diff options
157 files changed, 8708 insertions, 2893 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index caa7c3a..6bc2d87 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8373,9 +8373,14 @@ M: Chris Metcalf <cmetcalf@tilera.com> W: http://www.tilera.com/scm/ S: Supported F: arch/tile/ -F: drivers/tty/hvc/hvc_tile.c -F: drivers/net/ethernet/tile/ +F: drivers/char/tile-srom.c F: drivers/edac/tile_edac.c +F: drivers/net/ethernet/tile/ +F: drivers/rtc/rtc-tile.c +F: drivers/tty/hvc/hvc_tile.c +F: drivers/tty/serial/tilegx.c +F: drivers/usb/host/*-tilegx.c +F: include/linux/usb/tilegx.h TLAN NETWORK DRIVER M: Samuel Chessman <chessman@tux.org> diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 24565a7..6e1ed55 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -26,6 +26,7 @@ config TILE select HAVE_SYSCALL_TRACEPOINTS select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select HAVE_DEBUG_STACKOVERFLOW + select ARCH_WANT_FRAME_POINTERS # FIXME: investigate whether we need/want these options. # select HAVE_IOREMAP_PROT @@ -64,6 +65,9 @@ config HUGETLB_SUPER_PAGES depends on HUGETLB_PAGE && TILEGX def_bool y +config GENERIC_TIME_VSYSCALL + def_bool y + # FIXME: tilegx can implement a more efficient rwsem. config RWSEM_GENERIC_SPINLOCK def_bool y @@ -112,10 +116,19 @@ config SMP config HVC_TILE depends on TTY select HVC_DRIVER + select HVC_IRQ if TILEGX def_bool y config TILEGX - bool "Building with TILE-Gx (64-bit) compiler and toolchain" + bool "Building for TILE-Gx (64-bit) processor" + select HAVE_FUNCTION_TRACER + select HAVE_FUNCTION_TRACE_MCOUNT_TEST + select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_DYNAMIC_FTRACE + select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_KPROBES + select HAVE_KRETPROBES + select HAVE_ARCH_KGDB config TILEPRO def_bool !TILEGX @@ -194,7 +207,7 @@ config SYSVIPC_COMPAT def_bool y depends on COMPAT && SYSVIPC -# We do not currently support disabling HIGHMEM on tile64 and tilepro. +# We do not currently support disabling HIGHMEM on tilepro. config HIGHMEM bool # "Support for more than 512 MB of RAM" default !TILEGX @@ -300,6 +313,8 @@ config PAGE_OFFSET source "mm/Kconfig" +source "kernel/Kconfig.preempt" + config CMDLINE_BOOL bool "Built-in kernel command line" default n @@ -396,8 +411,20 @@ config NO_IOMEM config NO_IOPORT def_bool !PCI +config TILE_PCI_IO + bool "PCI I/O space support" + default n + depends on PCI + depends on TILEGX + ---help--- + Enable PCI I/O space support on TILEGx. Since the PCI I/O space + is used by few modern PCIe endpoint devices, its support is disabled + by default to save the TRIO PIO Region resource for other purposes. + source "drivers/pci/Kconfig" +source "drivers/pci/pcie/Kconfig" + config TILE_USB tristate "Tilera USB host adapter support" default y diff --git a/arch/tile/Kconfig.debug b/arch/tile/Kconfig.debug index 9165ea9..19734d3 100644 --- a/arch/tile/Kconfig.debug +++ b/arch/tile/Kconfig.debug @@ -14,14 +14,12 @@ config EARLY_PRINTK with klogd/syslogd. You should normally N here, unless you want to debug such a crash. -config DEBUG_EXTRA_FLAGS - string "Additional compiler arguments when building with '-g'" - depends on DEBUG_INFO - default "" +config TILE_HVGLUE_TRACE + bool "Provide wrapper functions for hypervisor ABI calls" + default n help - Debug info can be large, and flags like - `-femit-struct-debug-baseonly' can reduce the kernel file - size and build time noticeably. Such flags are often - helpful if the main use of debug info is line number info. + Provide wrapper functions for the hypervisor ABI calls + defined in arch/tile/kernel/hvglue.S. This allows tracing + mechanisms, etc., to have visibility into those calls. endmenu diff --git a/arch/tile/Makefile b/arch/tile/Makefile index 3d15364..4dc380a 100644 --- a/arch/tile/Makefile +++ b/arch/tile/Makefile @@ -30,10 +30,6 @@ endif # In kernel modules, this causes load failures due to unsupported relocations. KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"") -KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS) -endif - LIBGCC_PATH := \ $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name) diff --git a/arch/tile/configs/tilegx_defconfig b/arch/tile/configs/tilegx_defconfig index 4768481..730e40d 100644 --- a/arch/tile/configs/tilegx_defconfig +++ b/arch/tile/configs/tilegx_defconfig @@ -1,16 +1,15 @@ CONFIG_TILEGX=y -CONFIG_EXPERIMENTAL=y -# CONFIG_LOCALVERSION_AUTO is not set CONFIG_SYSVIPC=y CONFIG_POSIX_MQUEUE=y +CONFIG_FHANDLE=y +CONFIG_AUDIT=y +CONFIG_NO_HZ=y CONFIG_BSD_PROCESS_ACCT=y CONFIG_BSD_PROCESS_ACCT_V3=y -CONFIG_FHANDLE=y CONFIG_TASKSTATS=y CONFIG_TASK_DELAY_ACCT=y CONFIG_TASK_XACCT=y CONFIG_TASK_IO_ACCOUNTING=y -CONFIG_AUDIT=y CONFIG_LOG_BUF_SHIFT=19 CONFIG_CGROUPS=y CONFIG_CGROUP_DEBUG=y @@ -18,18 +17,18 @@ CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y -CONFIG_CGROUP_MEMCG=y -CONFIG_CGROUP_MEMCG_SWAP=y CONFIG_CGROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_BLK_CGROUP=y CONFIG_NAMESPACES=y CONFIG_RELAY=y CONFIG_BLK_DEV_INITRD=y +CONFIG_RD_XZ=y CONFIG_SYSCTL_SYSCALL=y CONFIG_EMBEDDED=y # CONFIG_COMPAT_BRK is not set CONFIG_PROFILING=y +CONFIG_KPROBES=y CONFIG_MODULES=y CONFIG_MODULE_FORCE_LOAD=y CONFIG_MODULE_UNLOAD=y @@ -45,12 +44,12 @@ CONFIG_UNIXWARE_DISKLABEL=y CONFIG_SGI_PARTITION=y CONFIG_SUN_PARTITION=y CONFIG_KARMA_PARTITION=y -CONFIG_EFI_PARTITION=y CONFIG_CFQ_GROUP_IOSCHED=y CONFIG_NR_CPUS=100 -CONFIG_NO_HZ=y -CONFIG_HIGH_RES_TIMERS=y CONFIG_HZ_100=y +# CONFIG_COMPACTION is not set +CONFIG_PREEMPT_VOLUNTARY=y +CONFIG_TILE_PCI_IO=y CONFIG_PCI_DEBUG=y # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set CONFIG_BINFMT_MISC=y @@ -108,150 +107,9 @@ CONFIG_IPV6_MULTIPLE_TABLES=y CONFIG_IPV6_MROUTE=y CONFIG_IPV6_PIMSM_V2=y CONFIG_NETLABEL=y -CONFIG_NETFILTER=y -CONFIG_NF_CONNTRACK=m -CONFIG_NF_CONNTRACK_SECMARK=y -CONFIG_NF_CONNTRACK_ZONES=y -CONFIG_NF_CONNTRACK_EVENTS=y -CONFIG_NF_CT_PROTO_DCCP=m -CONFIG_NF_CT_PROTO_UDPLITE=m -CONFIG_NF_CONNTRACK_AMANDA=m -CONFIG_NF_CONNTRACK_FTP=m -CONFIG_NF_CONNTRACK_H323=m -CONFIG_NF_CONNTRACK_IRC=m -CONFIG_NF_CONNTRACK_NETBIOS_NS=m -CONFIG_NF_CONNTRACK_PPTP=m -CONFIG_NF_CONNTRACK_SANE=m -CONFIG_NF_CONNTRACK_SIP=m -CONFIG_NF_CONNTRACK_TFTP=m -CONFIG_NETFILTER_TPROXY=m -CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m -CONFIG_NETFILTER_XT_TARGET_CONNMARK=m -CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=m -CONFIG_NETFILTER_XT_TARGET_CT=m -CONFIG_NETFILTER_XT_TARGET_DSCP=m -CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m -CONFIG_NETFILTER_XT_TARGET_MARK=m -CONFIG_NETFILTER_XT_TARGET_NFLOG=m -CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m -CONFIG_NETFILTER_XT_TARGET_TEE=m -CONFIG_NETFILTER_XT_TARGET_TPROXY=m -CONFIG_NETFILTER_XT_TARGET_TRACE=m -CONFIG_NETFILTER_XT_TARGET_SECMARK=m -CONFIG_NETFILTER_XT_TARGET_TCPMSS=m -CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m -CONFIG_NETFILTER_XT_MATCH_CLUSTER=m -CONFIG_NETFILTER_XT_MATCH_COMMENT=m -CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m -CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m -CONFIG_NETFILTER_XT_MATCH_CONNMARK=m -CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m -CONFIG_NETFILTER_XT_MATCH_DCCP=m -CONFIG_NETFILTER_XT_MATCH_DSCP=m -CONFIG_NETFILTER_XT_MATCH_ESP=m -CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m -CONFIG_NETFILTER_XT_MATCH_HELPER=m -CONFIG_NETFILTER_XT_MATCH_IPRANGE=m -CONFIG_NETFILTER_XT_MATCH_IPVS=m -CONFIG_NETFILTER_XT_MATCH_LENGTH=m -CONFIG_NETFILTER_XT_MATCH_LIMIT=m -CONFIG_NETFILTER_XT_MATCH_MAC=m -CONFIG_NETFILTER_XT_MATCH_MARK=m -CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m -CONFIG_NETFILTER_XT_MATCH_OSF=m -CONFIG_NETFILTER_XT_MATCH_OWNER=m -CONFIG_NETFILTER_XT_MATCH_POLICY=m -CONFIG_NETFILTER_XT_MATCH_PHYSDEV=m -CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m -CONFIG_NETFILTER_XT_MATCH_QUOTA=m -CONFIG_NETFILTER_XT_MATCH_RATEEST=m -CONFIG_NETFILTER_XT_MATCH_REALM=m -CONFIG_NETFILTER_XT_MATCH_RECENT=m -CONFIG_NETFILTER_XT_MATCH_SOCKET=m -CONFIG_NETFILTER_XT_MATCH_STATE=m -CONFIG_NETFILTER_XT_MATCH_STATISTIC=m -CONFIG_NETFILTER_XT_MATCH_STRING=m -CONFIG_NETFILTER_XT_MATCH_TCPMSS=m -CONFIG_NETFILTER_XT_MATCH_TIME=m -CONFIG_NETFILTER_XT_MATCH_U32=m -CONFIG_IP_VS=m -CONFIG_IP_VS_IPV6=y -CONFIG_IP_VS_PROTO_TCP=y -CONFIG_IP_VS_PROTO_UDP=y -CONFIG_IP_VS_PROTO_ESP=y -CONFIG_IP_VS_PROTO_AH=y -CONFIG_IP_VS_PROTO_SCTP=y -CONFIG_IP_VS_RR=m -CONFIG_IP_VS_WRR=m -CONFIG_IP_VS_LC=m -CONFIG_IP_VS_WLC=m -CONFIG_IP_VS_LBLC=m -CONFIG_IP_VS_LBLCR=m -CONFIG_IP_VS_SED=m -CONFIG_IP_VS_NQ=m -CONFIG_NF_CONNTRACK_IPV4=m -# CONFIG_NF_CONNTRACK_PROC_COMPAT is not set -CONFIG_IP_NF_QUEUE=m -CONFIG_IP_NF_IPTABLES=y -CONFIG_IP_NF_MATCH_AH=m -CONFIG_IP_NF_MATCH_ECN=m -CONFIG_IP_NF_MATCH_TTL=m -CONFIG_IP_NF_FILTER=y -CONFIG_IP_NF_TARGET_REJECT=y -CONFIG_IP_NF_TARGET_LOG=m -CONFIG_IP_NF_TARGET_ULOG=m -CONFIG_IP_NF_MANGLE=m -CONFIG_IP_NF_TARGET_ECN=m -CONFIG_IP_NF_TARGET_TTL=m -CONFIG_IP_NF_RAW=m -CONFIG_IP_NF_SECURITY=m -CONFIG_IP_NF_ARPTABLES=m -CONFIG_IP_NF_ARPFILTER=m -CONFIG_IP_NF_ARP_MANGLE=m -CONFIG_NF_CONNTRACK_IPV6=m -CONFIG_IP6_NF_QUEUE=m -CONFIG_IP6_NF_IPTABLES=m -CONFIG_IP6_NF_MATCH_AH=m -CONFIG_IP6_NF_MATCH_EUI64=m -CONFIG_IP6_NF_MATCH_FRAG=m -CONFIG_IP6_NF_MATCH_OPTS=m -CONFIG_IP6_NF_MATCH_HL=m -CONFIG_IP6_NF_MATCH_IPV6HEADER=m -CONFIG_IP6_NF_MATCH_MH=m -CONFIG_IP6_NF_MATCH_RT=m -CONFIG_IP6_NF_TARGET_HL=m -CONFIG_IP6_NF_TARGET_LOG=m -CONFIG_IP6_NF_FILTER=m -CONFIG_IP6_NF_TARGET_REJECT=m -CONFIG_IP6_NF_MANGLE=m -CONFIG_IP6_NF_RAW=m -CONFIG_IP6_NF_SECURITY=m -CONFIG_BRIDGE_NF_EBTABLES=m -CONFIG_BRIDGE_EBT_BROUTE=m -CONFIG_BRIDGE_EBT_T_FILTER=m -CONFIG_BRIDGE_EBT_T_NAT=m -CONFIG_BRIDGE_EBT_802_3=m -CONFIG_BRIDGE_EBT_AMONG=m -CONFIG_BRIDGE_EBT_ARP=m -CONFIG_BRIDGE_EBT_IP=m -CONFIG_BRIDGE_EBT_IP6=m -CONFIG_BRIDGE_EBT_LIMIT=m -CONFIG_BRIDGE_EBT_MARK=m -CONFIG_BRIDGE_EBT_PKTTYPE=m -CONFIG_BRIDGE_EBT_STP=m -CONFIG_BRIDGE_EBT_VLAN=m -CONFIG_BRIDGE_EBT_ARPREPLY=m -CONFIG_BRIDGE_EBT_DNAT=m -CONFIG_BRIDGE_EBT_MARK_T=m -CONFIG_BRIDGE_EBT_REDIRECT=m -CONFIG_BRIDGE_EBT_SNAT=m -CONFIG_BRIDGE_EBT_LOG=m -CONFIG_BRIDGE_EBT_ULOG=m -CONFIG_BRIDGE_EBT_NFLOG=m CONFIG_RDS=m CONFIG_RDS_TCP=m CONFIG_BRIDGE=m -CONFIG_NET_DSA=y CONFIG_VLAN_8021Q=m CONFIG_VLAN_8021Q_GVRP=y CONFIG_PHONET=m @@ -292,13 +150,13 @@ CONFIG_NET_ACT_POLICE=m CONFIG_NET_ACT_GACT=m CONFIG_GACT_PROB=y CONFIG_NET_ACT_MIRRED=m -CONFIG_NET_ACT_IPT=m CONFIG_NET_ACT_NAT=m CONFIG_NET_ACT_PEDIT=m CONFIG_NET_ACT_SIMP=m CONFIG_NET_ACT_SKBEDIT=m CONFIG_NET_CLS_IND=y CONFIG_DCB=y +CONFIG_DNS_RESOLVER=y # CONFIG_WIRELESS is not set CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_DEVTMPFS=y @@ -317,10 +175,12 @@ CONFIG_BLK_DEV_SD=y CONFIG_SCSI_CONSTANTS=y CONFIG_SCSI_LOGGING=y CONFIG_SCSI_SAS_ATA=y +CONFIG_ISCSI_TCP=m CONFIG_SCSI_MVSAS=y # CONFIG_SCSI_MVSAS_DEBUG is not set CONFIG_SCSI_MVSAS_TASKLET=y CONFIG_ATA=y +CONFIG_SATA_AHCI=y CONFIG_SATA_SIL24=y # CONFIG_ATA_SFF is not set CONFIG_MD=y @@ -343,6 +203,12 @@ CONFIG_DM_MULTIPATH_QL=m CONFIG_DM_MULTIPATH_ST=m CONFIG_DM_DELAY=m CONFIG_DM_UEVENT=y +CONFIG_TARGET_CORE=m +CONFIG_TCM_IBLOCK=m +CONFIG_TCM_FILEIO=m +CONFIG_TCM_PSCSI=m +CONFIG_LOOPBACK_TARGET=m +CONFIG_ISCSI_TARGET=m CONFIG_FUSION=y CONFIG_FUSION_SAS=y CONFIG_NETDEVICES=y @@ -359,42 +225,8 @@ CONFIG_VETH=m CONFIG_NET_DSA_MV88E6060=y CONFIG_NET_DSA_MV88E6131=y CONFIG_NET_DSA_MV88E6123_61_65=y -# CONFIG_NET_VENDOR_3COM is not set -# CONFIG_NET_VENDOR_ADAPTEC is not set -# CONFIG_NET_VENDOR_ALTEON is not set -# CONFIG_NET_VENDOR_AMD is not set -# CONFIG_NET_VENDOR_ATHEROS is not set -# CONFIG_NET_VENDOR_BROADCOM is not set -# CONFIG_NET_VENDOR_BROCADE is not set -# CONFIG_NET_VENDOR_CHELSIO is not set -# CONFIG_NET_VENDOR_CISCO is not set -# CONFIG_NET_VENDOR_DEC is not set -# CONFIG_NET_VENDOR_DLINK is not set -# CONFIG_NET_VENDOR_EMULEX is not set -# CONFIG_NET_VENDOR_EXAR is not set -# CONFIG_NET_VENDOR_HP is not set -# CONFIG_NET_VENDOR_INTEL is not set -# CONFIG_NET_VENDOR_MARVELL is not set -# CONFIG_NET_VENDOR_MELLANOX is not set -# CONFIG_NET_VENDOR_MICREL is not set -# CONFIG_NET_VENDOR_MYRI is not set -# CONFIG_NET_VENDOR_NATSEMI is not set -# CONFIG_NET_VENDOR_NVIDIA is not set -# CONFIG_NET_VENDOR_OKI is not set -# CONFIG_NET_PACKET_ENGINE is not set -# CONFIG_NET_VENDOR_QLOGIC is not set -# CONFIG_NET_VENDOR_REALTEK is not set -# CONFIG_NET_VENDOR_RDC is not set -# CONFIG_NET_VENDOR_SEEQ is not set -# CONFIG_NET_VENDOR_SILAN is not set -# CONFIG_NET_VENDOR_SIS is not set -# CONFIG_NET_VENDOR_SMSC is not set -# CONFIG_NET_VENDOR_STMICRO is not set -# CONFIG_NET_VENDOR_SUN is not set -# CONFIG_NET_VENDOR_TEHUTI is not set -# CONFIG_NET_VENDOR_TI is not set -# CONFIG_TILE_NET is not set -# CONFIG_NET_VENDOR_VIA is not set +CONFIG_SKY2=y +CONFIG_PTP_1588_CLOCK_TILEGX=y # CONFIG_WLAN is not set # CONFIG_INPUT_MOUSEDEV is not set # CONFIG_INPUT_KEYBOARD is not set @@ -402,6 +234,7 @@ CONFIG_NET_DSA_MV88E6123_61_65=y # CONFIG_SERIO is not set # CONFIG_VT is not set # CONFIG_LEGACY_PTYS is not set +CONFIG_SERIAL_TILEGX=y CONFIG_HW_RANDOM=y CONFIG_HW_RANDOM_TIMERIOMEM=m CONFIG_I2C=y @@ -410,13 +243,16 @@ CONFIG_I2C_CHARDEV=y CONFIG_WATCHDOG=y CONFIG_WATCHDOG_NOWAYOUT=y # CONFIG_VGA_ARB is not set -# CONFIG_HID_SUPPORT is not set +CONFIG_DRM=m +CONFIG_DRM_TDFX=m +CONFIG_DRM_R128=m +CONFIG_DRM_MGA=m +CONFIG_DRM_VIA=m +CONFIG_DRM_SAVAGE=m CONFIG_USB=y -# CONFIG_USB_DEVICE_CLASS is not set CONFIG_USB_EHCI_HCD=y CONFIG_USB_OHCI_HCD=y CONFIG_USB_STORAGE=y -CONFIG_USB_LIBUSUAL=y CONFIG_EDAC=y CONFIG_EDAC_MM_EDAC=y CONFIG_RTC_CLASS=y @@ -464,9 +300,8 @@ CONFIG_ECRYPT_FS=m CONFIG_CRAMFS=m CONFIG_SQUASHFS=m CONFIG_NFS_FS=m -CONFIG_NFS_V3=y CONFIG_NFS_V3_ACL=y -CONFIG_NFS_V4=y +CONFIG_NFS_V4=m CONFIG_NFS_V4_1=y CONFIG_NFS_FSCACHE=y CONFIG_NFSD=m @@ -519,25 +354,28 @@ CONFIG_NLS_ISO8859_15=m CONFIG_NLS_KOI8_R=m CONFIG_NLS_KOI8_U=m CONFIG_NLS_UTF8=m +CONFIG_DLM=m CONFIG_DLM_DEBUG=y +CONFIG_DYNAMIC_DEBUG=y +CONFIG_DEBUG_INFO=y +CONFIG_DEBUG_INFO_REDUCED=y # CONFIG_ENABLE_WARN_DEPRECATED is not set -CONFIG_MAGIC_SYSRQ=y CONFIG_STRIP_ASM_SYMS=y CONFIG_DEBUG_FS=y CONFIG_HEADERS_CHECK=y +# CONFIG_FRAME_POINTER is not set +CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y +CONFIG_DEBUG_VM=y +CONFIG_DEBUG_MEMORY_INIT=y +CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_LOCKUP_DETECTOR=y CONFIG_SCHEDSTATS=y CONFIG_TIMER_STATS=y -CONFIG_DEBUG_INFO=y -CONFIG_DEBUG_INFO_REDUCED=y -CONFIG_DEBUG_VM=y -CONFIG_DEBUG_MEMORY_INIT=y CONFIG_DEBUG_LIST=y CONFIG_DEBUG_CREDENTIALS=y -CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y -CONFIG_DYNAMIC_DEBUG=y +CONFIG_RCU_CPU_STALL_TIMEOUT=60 CONFIG_ASYNC_RAID6_TEST=m -CONFIG_DEBUG_STACKOVERFLOW=y +CONFIG_KGDB=y CONFIG_KEYS_DEBUG_PROC_KEYS=y CONFIG_SECURITY=y CONFIG_SECURITYFS=y @@ -546,7 +384,6 @@ CONFIG_SECURITY_NETWORK_XFRM=y CONFIG_SECURITY_SELINUX=y CONFIG_SECURITY_SELINUX_BOOTPARAM=y CONFIG_SECURITY_SELINUX_DISABLE=y -CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_PCRYPT=m CONFIG_CRYPTO_CRYPTD=m CONFIG_CRYPTO_TEST=m @@ -559,14 +396,12 @@ CONFIG_CRYPTO_XTS=m CONFIG_CRYPTO_HMAC=y CONFIG_CRYPTO_XCBC=m CONFIG_CRYPTO_VMAC=m -CONFIG_CRYPTO_CRC32C=y CONFIG_CRYPTO_MICHAEL_MIC=m CONFIG_CRYPTO_RMD128=m CONFIG_CRYPTO_RMD160=m CONFIG_CRYPTO_RMD256=m CONFIG_CRYPTO_RMD320=m CONFIG_CRYPTO_SHA1=y -CONFIG_CRYPTO_SHA256=m CONFIG_CRYPTO_SHA512=m CONFIG_CRYPTO_TGR192=m CONFIG_CRYPTO_WP512=m diff --git a/arch/tile/configs/tilepro_defconfig b/arch/tile/configs/tilepro_defconfig index dd2b8f0..80fc32e 100644 --- a/arch/tile/configs/tilepro_defconfig +++ b/arch/tile/configs/tilepro_defconfig @@ -1,15 +1,14 @@ -CONFIG_EXPERIMENTAL=y -# CONFIG_LOCALVERSION_AUTO is not set CONFIG_SYSVIPC=y CONFIG_POSIX_MQUEUE=y +CONFIG_AUDIT=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y CONFIG_BSD_PROCESS_ACCT=y CONFIG_BSD_PROCESS_ACCT_V3=y -CONFIG_FHANDLE=y CONFIG_TASKSTATS=y CONFIG_TASK_DELAY_ACCT=y CONFIG_TASK_XACCT=y CONFIG_TASK_IO_ACCOUNTING=y -CONFIG_AUDIT=y CONFIG_LOG_BUF_SHIFT=19 CONFIG_CGROUPS=y CONFIG_CGROUP_DEBUG=y @@ -17,14 +16,13 @@ CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y -CONFIG_CGROUP_MEMCG=y -CONFIG_CGROUP_MEMCG_SWAP=y CONFIG_CGROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_BLK_CGROUP=y CONFIG_NAMESPACES=y CONFIG_RELAY=y CONFIG_BLK_DEV_INITRD=y +CONFIG_RD_XZ=y CONFIG_SYSCTL_SYSCALL=y CONFIG_EMBEDDED=y # CONFIG_COMPAT_BRK is not set @@ -44,11 +42,10 @@ CONFIG_UNIXWARE_DISKLABEL=y CONFIG_SGI_PARTITION=y CONFIG_SUN_PARTITION=y CONFIG_KARMA_PARTITION=y -CONFIG_EFI_PARTITION=y CONFIG_CFQ_GROUP_IOSCHED=y -CONFIG_NO_HZ=y -CONFIG_HIGH_RES_TIMERS=y CONFIG_HZ_100=y +# CONFIG_COMPACTION is not set +CONFIG_PREEMPT_VOLUNTARY=y CONFIG_PCI_DEBUG=y # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set CONFIG_BINFMT_MISC=y @@ -122,16 +119,15 @@ CONFIG_NF_CONNTRACK_PPTP=m CONFIG_NF_CONNTRACK_SANE=m CONFIG_NF_CONNTRACK_SIP=m CONFIG_NF_CONNTRACK_TFTP=m -CONFIG_NETFILTER_TPROXY=m CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m CONFIG_NETFILTER_XT_TARGET_CONNMARK=m CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=m -CONFIG_NETFILTER_XT_TARGET_CT=m CONFIG_NETFILTER_XT_TARGET_DSCP=m CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m CONFIG_NETFILTER_XT_TARGET_MARK=m CONFIG_NETFILTER_XT_TARGET_NFLOG=m CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m +CONFIG_NETFILTER_XT_TARGET_NOTRACK=m CONFIG_NETFILTER_XT_TARGET_TEE=m CONFIG_NETFILTER_XT_TARGET_TPROXY=m CONFIG_NETFILTER_XT_TARGET_TRACE=m @@ -189,14 +185,12 @@ CONFIG_IP_VS_SED=m CONFIG_IP_VS_NQ=m CONFIG_NF_CONNTRACK_IPV4=m # CONFIG_NF_CONNTRACK_PROC_COMPAT is not set -CONFIG_IP_NF_QUEUE=m CONFIG_IP_NF_IPTABLES=y CONFIG_IP_NF_MATCH_AH=m CONFIG_IP_NF_MATCH_ECN=m CONFIG_IP_NF_MATCH_TTL=m CONFIG_IP_NF_FILTER=y CONFIG_IP_NF_TARGET_REJECT=y -CONFIG_IP_NF_TARGET_LOG=m CONFIG_IP_NF_TARGET_ULOG=m CONFIG_IP_NF_MANGLE=m CONFIG_IP_NF_TARGET_ECN=m @@ -207,8 +201,6 @@ CONFIG_IP_NF_ARPTABLES=m CONFIG_IP_NF_ARPFILTER=m CONFIG_IP_NF_ARP_MANGLE=m CONFIG_NF_CONNTRACK_IPV6=m -CONFIG_IP6_NF_QUEUE=m -CONFIG_IP6_NF_IPTABLES=m CONFIG_IP6_NF_MATCH_AH=m CONFIG_IP6_NF_MATCH_EUI64=m CONFIG_IP6_NF_MATCH_FRAG=m @@ -218,7 +210,6 @@ CONFIG_IP6_NF_MATCH_IPV6HEADER=m CONFIG_IP6_NF_MATCH_MH=m CONFIG_IP6_NF_MATCH_RT=m CONFIG_IP6_NF_TARGET_HL=m -CONFIG_IP6_NF_TARGET_LOG=m CONFIG_IP6_NF_FILTER=m CONFIG_IP6_NF_TARGET_REJECT=m CONFIG_IP6_NF_MANGLE=m @@ -249,7 +240,6 @@ CONFIG_BRIDGE_EBT_NFLOG=m CONFIG_RDS=m CONFIG_RDS_TCP=m CONFIG_BRIDGE=m -CONFIG_NET_DSA=y CONFIG_VLAN_8021Q=m CONFIG_VLAN_8021Q_GVRP=y CONFIG_PHONET=m @@ -297,6 +287,7 @@ CONFIG_NET_ACT_SIMP=m CONFIG_NET_ACT_SKBEDIT=m CONFIG_NET_CLS_IND=y CONFIG_DCB=y +CONFIG_DNS_RESOLVER=y # CONFIG_WIRELESS is not set CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_DEVTMPFS=y @@ -354,40 +345,7 @@ CONFIG_NET_DSA_MV88E6060=y CONFIG_NET_DSA_MV88E6131=y CONFIG_NET_DSA_MV88E6123_61_65=y # CONFIG_NET_VENDOR_3COM is not set -# CONFIG_NET_VENDOR_ADAPTEC is not set -# CONFIG_NET_VENDOR_ALTEON is not set -# CONFIG_NET_VENDOR_AMD is not set -# CONFIG_NET_VENDOR_ATHEROS is not set -# CONFIG_NET_VENDOR_BROADCOM is not set -# CONFIG_NET_VENDOR_BROCADE is not set -# CONFIG_NET_VENDOR_CHELSIO is not set -# CONFIG_NET_VENDOR_CISCO is not set -# CONFIG_NET_VENDOR_DEC is not set -# CONFIG_NET_VENDOR_DLINK is not set -# CONFIG_NET_VENDOR_EMULEX is not set -# CONFIG_NET_VENDOR_EXAR is not set -# CONFIG_NET_VENDOR_HP is not set -# CONFIG_NET_VENDOR_INTEL is not set -# CONFIG_NET_VENDOR_MARVELL is not set -# CONFIG_NET_VENDOR_MELLANOX is not set -# CONFIG_NET_VENDOR_MICREL is not set -# CONFIG_NET_VENDOR_MYRI is not set -# CONFIG_NET_VENDOR_NATSEMI is not set -# CONFIG_NET_VENDOR_NVIDIA is not set -# CONFIG_NET_VENDOR_OKI is not set -# CONFIG_NET_PACKET_ENGINE is not set -# CONFIG_NET_VENDOR_QLOGIC is not set -# CONFIG_NET_VENDOR_REALTEK is not set -# CONFIG_NET_VENDOR_RDC is not set -# CONFIG_NET_VENDOR_SEEQ is not set -# CONFIG_NET_VENDOR_SILAN is not set -# CONFIG_NET_VENDOR_SIS is not set -# CONFIG_NET_VENDOR_SMSC is not set -# CONFIG_NET_VENDOR_STMICRO is not set -# CONFIG_NET_VENDOR_SUN is not set -# CONFIG_NET_VENDOR_TEHUTI is not set -# CONFIG_NET_VENDOR_TI is not set -# CONFIG_NET_VENDOR_VIA is not set +CONFIG_E1000E=y # CONFIG_WLAN is not set # CONFIG_INPUT_MOUSEDEV is not set # CONFIG_INPUT_KEYBOARD is not set @@ -403,7 +361,6 @@ CONFIG_I2C_CHARDEV=y CONFIG_WATCHDOG=y CONFIG_WATCHDOG_NOWAYOUT=y # CONFIG_VGA_ARB is not set -# CONFIG_HID_SUPPORT is not set # CONFIG_USB_SUPPORT is not set CONFIG_EDAC=y CONFIG_EDAC_MM_EDAC=y @@ -448,13 +405,13 @@ CONFIG_PROC_KCORE=y CONFIG_TMPFS=y CONFIG_TMPFS_POSIX_ACL=y CONFIG_HUGETLBFS=y +CONFIG_CONFIGFS_FS=m CONFIG_ECRYPT_FS=m CONFIG_CRAMFS=m CONFIG_SQUASHFS=m CONFIG_NFS_FS=m -CONFIG_NFS_V3=y CONFIG_NFS_V3_ACL=y -CONFIG_NFS_V4=y +CONFIG_NFS_V4=m CONFIG_NFS_V4_1=y CONFIG_NFS_FSCACHE=y CONFIG_NFSD=m @@ -508,26 +465,29 @@ CONFIG_NLS_ISO8859_15=m CONFIG_NLS_KOI8_R=m CONFIG_NLS_KOI8_U=m CONFIG_NLS_UTF8=m +CONFIG_DLM=m CONFIG_DLM_DEBUG=y +CONFIG_DYNAMIC_DEBUG=y +CONFIG_DEBUG_INFO=y +CONFIG_DEBUG_INFO_REDUCED=y # CONFIG_ENABLE_WARN_DEPRECATED is not set CONFIG_FRAME_WARN=2048 -CONFIG_MAGIC_SYSRQ=y CONFIG_STRIP_ASM_SYMS=y CONFIG_DEBUG_FS=y CONFIG_HEADERS_CHECK=y +# CONFIG_FRAME_POINTER is not set +CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y +CONFIG_MAGIC_SYSRQ=y +CONFIG_DEBUG_VM=y +CONFIG_DEBUG_MEMORY_INIT=y +CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_LOCKUP_DETECTOR=y CONFIG_SCHEDSTATS=y CONFIG_TIMER_STATS=y -CONFIG_DEBUG_INFO=y -CONFIG_DEBUG_INFO_REDUCED=y -CONFIG_DEBUG_VM=y -CONFIG_DEBUG_MEMORY_INIT=y CONFIG_DEBUG_LIST=y CONFIG_DEBUG_CREDENTIALS=y -CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y -CONFIG_DYNAMIC_DEBUG=y +CONFIG_RCU_CPU_STALL_TIMEOUT=60 CONFIG_ASYNC_RAID6_TEST=m -CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_KEYS_DEBUG_PROC_KEYS=y CONFIG_SECURITY=y CONFIG_SECURITYFS=y @@ -536,7 +496,6 @@ CONFIG_SECURITY_NETWORK_XFRM=y CONFIG_SECURITY_SELINUX=y CONFIG_SECURITY_SELINUX_BOOTPARAM=y CONFIG_SECURITY_SELINUX_DISABLE=y -CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_PCRYPT=m CONFIG_CRYPTO_CRYPTD=m CONFIG_CRYPTO_TEST=m @@ -549,14 +508,12 @@ CONFIG_CRYPTO_XTS=m CONFIG_CRYPTO_HMAC=y CONFIG_CRYPTO_XCBC=m CONFIG_CRYPTO_VMAC=m -CONFIG_CRYPTO_CRC32C=y CONFIG_CRYPTO_MICHAEL_MIC=m CONFIG_CRYPTO_RMD128=m CONFIG_CRYPTO_RMD160=m CONFIG_CRYPTO_RMD256=m CONFIG_CRYPTO_RMD320=m CONFIG_CRYPTO_SHA1=y -CONFIG_CRYPTO_SHA256=m CONFIG_CRYPTO_SHA512=m CONFIG_CRYPTO_TGR192=m CONFIG_CRYPTO_WP512=m diff --git a/arch/tile/gxio/Kconfig b/arch/tile/gxio/Kconfig index d221f8d..d4e10d5 100644 --- a/arch/tile/gxio/Kconfig +++ b/arch/tile/gxio/Kconfig @@ -26,3 +26,8 @@ config TILE_GXIO_TRIO config TILE_GXIO_USB_HOST bool select TILE_GXIO + +# Support direct access to the TILE-Gx UART hardware from kernel space. +config TILE_GXIO_UART + bool + select TILE_GXIO diff --git a/arch/tile/gxio/Makefile b/arch/tile/gxio/Makefile index 8684bca..26ae2c7 100644 --- a/arch/tile/gxio/Makefile +++ b/arch/tile/gxio/Makefile @@ -6,4 +6,5 @@ obj-$(CONFIG_TILE_GXIO) += iorpc_globals.o kiorpc.o obj-$(CONFIG_TILE_GXIO_DMA) += dma_queue.o obj-$(CONFIG_TILE_GXIO_MPIPE) += mpipe.o iorpc_mpipe.o iorpc_mpipe_info.o obj-$(CONFIG_TILE_GXIO_TRIO) += trio.o iorpc_trio.o +obj-$(CONFIG_TILE_GXIO_UART) += uart.o iorpc_uart.o obj-$(CONFIG_TILE_GXIO_USB_HOST) += usb_host.o iorpc_usb_host.o diff --git a/arch/tile/gxio/iorpc_trio.c b/arch/tile/gxio/iorpc_trio.c index cef4b22..da6e18e 100644 --- a/arch/tile/gxio/iorpc_trio.c +++ b/arch/tile/gxio/iorpc_trio.c @@ -61,6 +61,29 @@ int gxio_trio_alloc_memory_maps(gxio_trio_context_t * context, EXPORT_SYMBOL(gxio_trio_alloc_memory_maps); +struct alloc_scatter_queues_param { + unsigned int count; + unsigned int first; + unsigned int flags; +}; + +int gxio_trio_alloc_scatter_queues(gxio_trio_context_t * context, + unsigned int count, unsigned int first, + unsigned int flags) +{ + struct alloc_scatter_queues_param temp; + struct alloc_scatter_queues_param *params = &temp; + + params->count = count; + params->first = first; + params->flags = flags; + + return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params, + sizeof(*params), + GXIO_TRIO_OP_ALLOC_SCATTER_QUEUES); +} + +EXPORT_SYMBOL(gxio_trio_alloc_scatter_queues); struct alloc_pio_regions_param { unsigned int count; diff --git a/arch/tile/gxio/iorpc_uart.c b/arch/tile/gxio/iorpc_uart.c new file mode 100644 index 0000000..b9a6d61 --- /dev/null +++ b/arch/tile/gxio/iorpc_uart.c @@ -0,0 +1,77 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* This file is machine-generated; DO NOT EDIT! */ +#include "gxio/iorpc_uart.h" + +struct cfg_interrupt_param { + union iorpc_interrupt interrupt; +}; + +int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, int inter_x, + int inter_y, int inter_ipi, int inter_event) +{ + struct cfg_interrupt_param temp; + struct cfg_interrupt_param *params = &temp; + + params->interrupt.kernel.x = inter_x; + params->interrupt.kernel.y = inter_y; + params->interrupt.kernel.ipi = inter_ipi; + params->interrupt.kernel.event = inter_event; + + return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params, + sizeof(*params), GXIO_UART_OP_CFG_INTERRUPT); +} + +EXPORT_SYMBOL(gxio_uart_cfg_interrupt); + +struct get_mmio_base_param { + HV_PTE base; +}; + +int gxio_uart_get_mmio_base(gxio_uart_context_t *context, HV_PTE *base) +{ + int __result; + struct get_mmio_base_param temp; + struct get_mmio_base_param *params = &temp; + + __result = + hv_dev_pread(context->fd, 0, (HV_VirtAddr) params, sizeof(*params), + GXIO_UART_OP_GET_MMIO_BASE); + *base = params->base; + + return __result; +} + +EXPORT_SYMBOL(gxio_uart_get_mmio_base); + +struct check_mmio_offset_param { + unsigned long offset; + unsigned long size; +}; + +int gxio_uart_check_mmio_offset(gxio_uart_context_t *context, + unsigned long offset, unsigned long size) +{ + struct check_mmio_offset_param temp; + struct check_mmio_offset_param *params = &temp; + + params->offset = offset; + params->size = size; + + return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params, + sizeof(*params), GXIO_UART_OP_CHECK_MMIO_OFFSET); +} + +EXPORT_SYMBOL(gxio_uart_check_mmio_offset); diff --git a/arch/tile/gxio/uart.c b/arch/tile/gxio/uart.c new file mode 100644 index 0000000..ba58517 --- /dev/null +++ b/arch/tile/gxio/uart.c @@ -0,0 +1,87 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* + * Implementation of UART gxio calls. + */ + +#include <linux/io.h> +#include <linux/errno.h> +#include <linux/module.h> + +#include <gxio/uart.h> +#include <gxio/iorpc_globals.h> +#include <gxio/iorpc_uart.h> +#include <gxio/kiorpc.h> + +int gxio_uart_init(gxio_uart_context_t *context, int uart_index) +{ + char file[32]; + int fd; + + snprintf(file, sizeof(file), "uart/%d/iorpc", uart_index); + fd = hv_dev_open((HV_VirtAddr) file, 0); + if (fd < 0) { + if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX) + return fd; + else + return -ENODEV; + } + + context->fd = fd; + + /* Map in the MMIO space. */ + context->mmio_base = (void __force *) + iorpc_ioremap(fd, HV_UART_MMIO_OFFSET, HV_UART_MMIO_SIZE); + + if (context->mmio_base == NULL) { + hv_dev_close(context->fd); + context->fd = -1; + return -ENODEV; + } + + return 0; +} + +EXPORT_SYMBOL_GPL(gxio_uart_init); + +int gxio_uart_destroy(gxio_uart_context_t *context) +{ + iounmap((void __force __iomem *)(context->mmio_base)); + hv_dev_close(context->fd); + + context->mmio_base = NULL; + context->fd = -1; + + return 0; +} + +EXPORT_SYMBOL_GPL(gxio_uart_destroy); + +/* UART register write wrapper. */ +void gxio_uart_write(gxio_uart_context_t *context, uint64_t offset, + uint64_t word) +{ + __gxio_mmio_write(context->mmio_base + offset, word); +} + +EXPORT_SYMBOL_GPL(gxio_uart_write); + +/* UART register read wrapper. */ +uint64_t gxio_uart_read(gxio_uart_context_t *context, uint64_t offset) +{ + return __gxio_mmio_read(context->mmio_base + offset); +} + +EXPORT_SYMBOL_GPL(gxio_uart_read); diff --git a/arch/tile/include/arch/trio.h b/arch/tile/include/arch/trio.h index d3000a8..c0ddedc 100644 --- a/arch/tile/include/arch/trio.h +++ b/arch/tile/include/arch/trio.h @@ -23,6 +23,45 @@ #ifndef __ASSEMBLER__ /* + * Map SQ Doorbell Format. + * This describes the format of the write-only doorbell register that exists + * in the last 8-bytes of the MAP_SQ_BASE/LIM range. This register is only + * writable from PCIe space. Writes to this register will not be written to + * Tile memory space and thus no IO VA translation is required if the last + * page of the BASE/LIM range is not otherwise written. + */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* + * When written with a 1, the associated MAP_SQ region's doorbell + * interrupt will be triggered once all previous writes are visible to + * Tile software. + */ + uint_reg_t doorbell : 1; + /* + * When written with a 1, the descriptor at the head of the associated + * MAP_SQ's FIFO will be dequeued. + */ + uint_reg_t pop : 1; + /* Reserved. */ + uint_reg_t __reserved : 62; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved : 62; + uint_reg_t pop : 1; + uint_reg_t doorbell : 1; +#endif + }; + + uint_reg_t word; +} TRIO_MAP_SQ_DOORBELL_FMT_t; + + +/* * Tile PIO Region Configuration - CFG Address Format. * This register describes the address format for PIO accesses when the * associated region is setup with TYPE=CFG. diff --git a/arch/tile/include/arch/uart.h b/arch/tile/include/arch/uart.h new file mode 100644 index 0000000..0796697 --- /dev/null +++ b/arch/tile/include/arch/uart.h @@ -0,0 +1,300 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* Machine-generated file; do not edit. */ + +#ifndef __ARCH_UART_H__ +#define __ARCH_UART_H__ + +#include <arch/abi.h> +#include <arch/uart_def.h> + +#ifndef __ASSEMBLER__ + +/* Divisor. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* + * Baud Rate Divisor. Desired_baud_rate = REF_CLK frequency / (baud * + * 16). + * Note: REF_CLK is always 125 MHz, the default + * divisor = 68, baud rate = 125M/(68*16) = 115200 baud. + */ + uint_reg_t divisor : 12; + /* Reserved. */ + uint_reg_t __reserved : 52; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved : 52; + uint_reg_t divisor : 12; +#endif + }; + + uint_reg_t word; +} UART_DIVISOR_t; + +/* FIFO Count. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* + * n: n active entries in the receive FIFO (max is 2**8). Each entry has + * 8 bits. + * 0: no active entry in the receive FIFO (that is empty). + */ + uint_reg_t rfifo_count : 9; + /* Reserved. */ + uint_reg_t __reserved_0 : 7; + /* + * n: n active entries in the transmit FIFO (max is 2**8). Each entry has + * 8 bits. + * 0: no active entry in the transmit FIFO (that is empty). + */ + uint_reg_t tfifo_count : 9; + /* Reserved. */ + uint_reg_t __reserved_1 : 7; + /* + * n: n active entries in the write FIFO (max is 2**2). Each entry has 8 + * bits. + * 0: no active entry in the write FIFO (that is empty). + */ + uint_reg_t wfifo_count : 3; + /* Reserved. */ + uint_reg_t __reserved_2 : 29; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_2 : 29; + uint_reg_t wfifo_count : 3; + uint_reg_t __reserved_1 : 7; + uint_reg_t tfifo_count : 9; + uint_reg_t __reserved_0 : 7; + uint_reg_t rfifo_count : 9; +#endif + }; + + uint_reg_t word; +} UART_FIFO_COUNT_t; + +/* FLAG. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* 1: receive FIFO is empty */ + uint_reg_t rfifo_empty : 1; + /* 1: write FIFO is empty. */ + uint_reg_t wfifo_empty : 1; + /* 1: transmit FIFO is empty. */ + uint_reg_t tfifo_empty : 1; + /* 1: receive FIFO is full. */ + uint_reg_t rfifo_full : 1; + /* 1: write FIFO is full. */ + uint_reg_t wfifo_full : 1; + /* 1: transmit FIFO is full. */ + uint_reg_t tfifo_full : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 57; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_1 : 57; + uint_reg_t tfifo_full : 1; + uint_reg_t wfifo_full : 1; + uint_reg_t rfifo_full : 1; + uint_reg_t tfifo_empty : 1; + uint_reg_t wfifo_empty : 1; + uint_reg_t rfifo_empty : 1; + uint_reg_t __reserved_0 : 1; +#endif + }; + + uint_reg_t word; +} UART_FLAG_t; + +/* + * Interrupt Vector Mask. + * Each bit in this register corresponds to a specific interrupt. When set, + * the associated interrupt will not be dispatched. + */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Read data FIFO read and no data available */ + uint_reg_t rdat_err : 1; + /* Write FIFO was written but it was full */ + uint_reg_t wdat_err : 1; + /* Stop bit not found when current data was received */ + uint_reg_t frame_err : 1; + /* Parity error was detected when current data was received */ + uint_reg_t parity_err : 1; + /* Data was received but the receive FIFO was full */ + uint_reg_t rfifo_overflow : 1; + /* + * An almost full event is reached when data is to be written to the + * receive FIFO, and the receive FIFO has more than or equal to + * BUFFER_THRESHOLD.RFIFO_AFULL bytes. + */ + uint_reg_t rfifo_afull : 1; + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* An entry in the transmit FIFO was popped */ + uint_reg_t tfifo_re : 1; + /* An entry has been pushed into the receive FIFO */ + uint_reg_t rfifo_we : 1; + /* An entry of the write FIFO has been popped */ + uint_reg_t wfifo_re : 1; + /* Rshim read receive FIFO in protocol mode */ + uint_reg_t rfifo_err : 1; + /* + * An almost empty event is reached when data is to be read from the + * transmit FIFO, and the transmit FIFO has less than or equal to + * BUFFER_THRESHOLD.TFIFO_AEMPTY bytes. + */ + uint_reg_t tfifo_aempty : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 52; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_1 : 52; + uint_reg_t tfifo_aempty : 1; + uint_reg_t rfifo_err : 1; + uint_reg_t wfifo_re : 1; + uint_reg_t rfifo_we : 1; + uint_reg_t tfifo_re : 1; + uint_reg_t __reserved_0 : 1; + uint_reg_t rfifo_afull : 1; + uint_reg_t rfifo_overflow : 1; + uint_reg_t parity_err : 1; + uint_reg_t frame_err : 1; + uint_reg_t wdat_err : 1; + uint_reg_t rdat_err : 1; +#endif + }; + + uint_reg_t word; +} UART_INTERRUPT_MASK_t; + +/* + * Interrupt vector, write-one-to-clear. + * Each bit in this register corresponds to a specific interrupt. Hardware + * sets the bit when the associated condition has occurred. Writing a 1 + * clears the status bit. + */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Read data FIFO read and no data available */ + uint_reg_t rdat_err : 1; + /* Write FIFO was written but it was full */ + uint_reg_t wdat_err : 1; + /* Stop bit not found when current data was received */ + uint_reg_t frame_err : 1; + /* Parity error was detected when current data was received */ + uint_reg_t parity_err : 1; + /* Data was received but the receive FIFO was full */ + uint_reg_t rfifo_overflow : 1; + /* + * Data was received and the receive FIFO is now almost full (more than + * BUFFER_THRESHOLD.RFIFO_AFULL bytes in it) + */ + uint_reg_t rfifo_afull : 1; + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* An entry in the transmit FIFO was popped */ + uint_reg_t tfifo_re : 1; + /* An entry has been pushed into the receive FIFO */ + uint_reg_t rfifo_we : 1; + /* An entry of the write FIFO has been popped */ + uint_reg_t wfifo_re : 1; + /* Rshim read receive FIFO in protocol mode */ + uint_reg_t rfifo_err : 1; + /* + * Data was read from the transmit FIFO and now it is almost empty (less + * than or equal to BUFFER_THRESHOLD.TFIFO_AEMPTY bytes in it). + */ + uint_reg_t tfifo_aempty : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 52; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_1 : 52; + uint_reg_t tfifo_aempty : 1; + uint_reg_t rfifo_err : 1; + uint_reg_t wfifo_re : 1; + uint_reg_t rfifo_we : 1; + uint_reg_t tfifo_re : 1; + uint_reg_t __reserved_0 : 1; + uint_reg_t rfifo_afull : 1; + uint_reg_t rfifo_overflow : 1; + uint_reg_t parity_err : 1; + uint_reg_t frame_err : 1; + uint_reg_t wdat_err : 1; + uint_reg_t rdat_err : 1; +#endif + }; + + uint_reg_t word; +} UART_INTERRUPT_STATUS_t; + +/* Type. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Number of stop bits, rx and tx */ + uint_reg_t sbits : 1; + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* Data word size, rx and tx */ + uint_reg_t dbits : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 1; + /* Parity selection, rx and tx */ + uint_reg_t ptype : 3; + /* Reserved. */ + uint_reg_t __reserved_2 : 57; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_2 : 57; + uint_reg_t ptype : 3; + uint_reg_t __reserved_1 : 1; + uint_reg_t dbits : 1; + uint_reg_t __reserved_0 : 1; + uint_reg_t sbits : 1; +#endif + }; + + uint_reg_t word; +} UART_TYPE_t; +#endif /* !defined(__ASSEMBLER__) */ + +#endif /* !defined(__ARCH_UART_H__) */ diff --git a/arch/tile/include/arch/uart_def.h b/arch/tile/include/arch/uart_def.h new file mode 100644 index 0000000..42bcaf5 --- /dev/null +++ b/arch/tile/include/arch/uart_def.h @@ -0,0 +1,120 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* Machine-generated file; do not edit. */ + +#ifndef __ARCH_UART_DEF_H__ +#define __ARCH_UART_DEF_H__ +#define UART_DIVISOR 0x0158 +#define UART_FIFO_COUNT 0x0110 +#define UART_FLAG 0x0108 +#define UART_INTERRUPT_MASK 0x0208 +#define UART_INTERRUPT_MASK__RDAT_ERR_SHIFT 0 +#define UART_INTERRUPT_MASK__RDAT_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__RDAT_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RDAT_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__RDAT_ERR_MASK 0x1 +#define UART_INTERRUPT_MASK__RDAT_ERR_FIELD 0,0 +#define UART_INTERRUPT_MASK__WDAT_ERR_SHIFT 1 +#define UART_INTERRUPT_MASK__WDAT_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__WDAT_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__WDAT_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__WDAT_ERR_MASK 0x2 +#define UART_INTERRUPT_MASK__WDAT_ERR_FIELD 1,1 +#define UART_INTERRUPT_MASK__FRAME_ERR_SHIFT 2 +#define UART_INTERRUPT_MASK__FRAME_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__FRAME_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__FRAME_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__FRAME_ERR_MASK 0x4 +#define UART_INTERRUPT_MASK__FRAME_ERR_FIELD 2,2 +#define UART_INTERRUPT_MASK__PARITY_ERR_SHIFT 3 +#define UART_INTERRUPT_MASK__PARITY_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__PARITY_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__PARITY_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__PARITY_ERR_MASK 0x8 +#define UART_INTERRUPT_MASK__PARITY_ERR_FIELD 3,3 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_SHIFT 4 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_MASK 0x10 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_FIELD 4,4 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_SHIFT 5 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_MASK 0x20 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_FIELD 5,5 +#define UART_INTERRUPT_MASK__TFIFO_RE_SHIFT 7 +#define UART_INTERRUPT_MASK__TFIFO_RE_WIDTH 1 +#define UART_INTERRUPT_MASK__TFIFO_RE_RESET_VAL 1 +#define UART_INTERRUPT_MASK__TFIFO_RE_RMASK 0x1 +#define UART_INTERRUPT_MASK__TFIFO_RE_MASK 0x80 +#define UART_INTERRUPT_MASK__TFIFO_RE_FIELD 7,7 +#define UART_INTERRUPT_MASK__RFIFO_WE_SHIFT 8 +#define UART_INTERRUPT_MASK__RFIFO_WE_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_WE_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_WE_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_WE_MASK 0x100 +#define UART_INTERRUPT_MASK__RFIFO_WE_FIELD 8,8 +#define UART_INTERRUPT_MASK__WFIFO_RE_SHIFT 9 +#define UART_INTERRUPT_MASK__WFIFO_RE_WIDTH 1 +#define UART_INTERRUPT_MASK__WFIFO_RE_RESET_VAL 1 +#define UART_INTERRUPT_MASK__WFIFO_RE_RMASK 0x1 +#define UART_INTERRUPT_MASK__WFIFO_RE_MASK 0x200 +#define UART_INTERRUPT_MASK__WFIFO_RE_FIELD 9,9 +#define UART_INTERRUPT_MASK__RFIFO_ERR_SHIFT 10 +#define UART_INTERRUPT_MASK__RFIFO_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_ERR_MASK 0x400 +#define UART_INTERRUPT_MASK__RFIFO_ERR_FIELD 10,10 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_SHIFT 11 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_WIDTH 1 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_RESET_VAL 1 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_RMASK 0x1 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_MASK 0x800 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_FIELD 11,11 +#define UART_INTERRUPT_STATUS 0x0200 +#define UART_RECEIVE_DATA 0x0148 +#define UART_TRANSMIT_DATA 0x0140 +#define UART_TYPE 0x0160 +#define UART_TYPE__SBITS_SHIFT 0 +#define UART_TYPE__SBITS_WIDTH 1 +#define UART_TYPE__SBITS_RESET_VAL 1 +#define UART_TYPE__SBITS_RMASK 0x1 +#define UART_TYPE__SBITS_MASK 0x1 +#define UART_TYPE__SBITS_FIELD 0,0 +#define UART_TYPE__SBITS_VAL_ONE_SBITS 0x0 +#define UART_TYPE__SBITS_VAL_TWO_SBITS 0x1 +#define UART_TYPE__DBITS_SHIFT 2 +#define UART_TYPE__DBITS_WIDTH 1 +#define UART_TYPE__DBITS_RESET_VAL 0 +#define UART_TYPE__DBITS_RMASK 0x1 +#define UART_TYPE__DBITS_MASK 0x4 +#define UART_TYPE__DBITS_FIELD 2,2 +#define UART_TYPE__DBITS_VAL_EIGHT_DBITS 0x0 +#define UART_TYPE__DBITS_VAL_SEVEN_DBITS 0x1 +#define UART_TYPE__PTYPE_SHIFT 4 +#define UART_TYPE__PTYPE_WIDTH 3 +#define UART_TYPE__PTYPE_RESET_VAL 3 +#define UART_TYPE__PTYPE_RMASK 0x7 +#define UART_TYPE__PTYPE_MASK 0x70 +#define UART_TYPE__PTYPE_FIELD 4,6 +#define UART_TYPE__PTYPE_VAL_NONE 0x0 +#define UART_TYPE__PTYPE_VAL_MARK 0x1 +#define UART_TYPE__PTYPE_VAL_SPACE 0x2 +#define UART_TYPE__PTYPE_VAL_EVEN 0x3 +#define UART_TYPE__PTYPE_VAL_ODD 0x4 +#endif /* !defined(__ARCH_UART_DEF_H__) */ diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild index b17b9b8..664d6ad 100644 --- a/arch/tile/include/asm/Kbuild +++ b/arch/tile/include/asm/Kbuild @@ -11,12 +11,13 @@ generic-y += errno.h generic-y += exec.h generic-y += fb.h generic-y += fcntl.h +generic-y += hw_irq.h generic-y += ioctl.h generic-y += ioctls.h generic-y += ipcbuf.h generic-y += irq_regs.h -generic-y += kdebug.h generic-y += local.h +generic-y += local64.h generic-y += msgbuf.h generic-y += mutex.h generic-y += param.h diff --git a/arch/tile/include/asm/atomic.h b/arch/tile/include/asm/atomic.h index e71387a..d385eaa 100644 --- a/arch/tile/include/asm/atomic.h +++ b/arch/tile/include/asm/atomic.h @@ -114,6 +114,32 @@ static inline int atomic_read(const atomic_t *v) #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) /** + * atomic_xchg - atomically exchange contents of memory with a new value + * @v: pointer of type atomic_t + * @i: integer value to store in memory + * + * Atomically sets @v to @i and returns old @v + */ +static inline int atomic_xchg(atomic_t *v, int n) +{ + return xchg(&v->counter, n); +} + +/** + * atomic_cmpxchg - atomically exchange contents of memory if it matches + * @v: pointer of type atomic_t + * @o: old value that memory should have + * @n: new value to write to memory if it matches + * + * Atomically checks if @v holds @o and replaces it with @n if so. + * Returns the old value at @v. + */ +static inline int atomic_cmpxchg(atomic_t *v, int o, int n) +{ + return cmpxchg(&v->counter, o, n); +} + +/** * atomic_add_negative - add and test if negative * @v: pointer of type atomic_t * @i: integer value to add @@ -133,6 +159,32 @@ static inline int atomic_read(const atomic_t *v) #ifndef __ASSEMBLY__ +/** + * atomic64_xchg - atomically exchange contents of memory with a new value + * @v: pointer of type atomic64_t + * @i: integer value to store in memory + * + * Atomically sets @v to @i and returns old @v + */ +static inline u64 atomic64_xchg(atomic64_t *v, u64 n) +{ + return xchg64(&v->counter, n); +} + +/** + * atomic64_cmpxchg - atomically exchange contents of memory if it matches + * @v: pointer of type atomic64_t + * @o: old value that memory should have + * @n: new value to write to memory if it matches + * + * Atomically checks if @v holds @o and replaces it with @n if so. + * Returns the old value at @v. + */ +static inline u64 atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n) +{ + return cmpxchg64(&v->counter, o, n); +} + static inline long long atomic64_dec_if_positive(atomic64_t *v) { long long c, old, dec; diff --git a/arch/tile/include/asm/atomic_32.h b/arch/tile/include/asm/atomic_32.h index e7fb5cf..0d0395b 100644 --- a/arch/tile/include/asm/atomic_32.h +++ b/arch/tile/include/asm/atomic_32.h @@ -22,40 +22,6 @@ #ifndef __ASSEMBLY__ -/* Tile-specific routines to support <linux/atomic.h>. */ -int _atomic_xchg(atomic_t *v, int n); -int _atomic_xchg_add(atomic_t *v, int i); -int _atomic_xchg_add_unless(atomic_t *v, int a, int u); -int _atomic_cmpxchg(atomic_t *v, int o, int n); - -/** - * atomic_xchg - atomically exchange contents of memory with a new value - * @v: pointer of type atomic_t - * @i: integer value to store in memory - * - * Atomically sets @v to @i and returns old @v - */ -static inline int atomic_xchg(atomic_t *v, int n) -{ - smp_mb(); /* barrier for proper semantics */ - return _atomic_xchg(v, n); -} - -/** - * atomic_cmpxchg - atomically exchange contents of memory if it matches - * @v: pointer of type atomic_t - * @o: old value that memory should have - * @n: new value to write to memory if it matches - * - * Atomically checks if @v holds @o and replaces it with @n if so. - * Returns the old value at @v. - */ -static inline int atomic_cmpxchg(atomic_t *v, int o, int n) -{ - smp_mb(); /* barrier for proper semantics */ - return _atomic_cmpxchg(v, o, n); -} - /** * atomic_add - add integer to atomic variable * @i: integer value to add @@ -65,7 +31,7 @@ static inline int atomic_cmpxchg(atomic_t *v, int o, int n) */ static inline void atomic_add(int i, atomic_t *v) { - _atomic_xchg_add(v, i); + _atomic_xchg_add(&v->counter, i); } /** @@ -78,7 +44,7 @@ static inline void atomic_add(int i, atomic_t *v) static inline int atomic_add_return(int i, atomic_t *v) { smp_mb(); /* barrier for proper semantics */ - return _atomic_xchg_add(v, i) + i; + return _atomic_xchg_add(&v->counter, i) + i; } /** @@ -93,7 +59,7 @@ static inline int atomic_add_return(int i, atomic_t *v) static inline int __atomic_add_unless(atomic_t *v, int a, int u) { smp_mb(); /* barrier for proper semantics */ - return _atomic_xchg_add_unless(v, a, u); + return _atomic_xchg_add_unless(&v->counter, a, u); } /** @@ -108,7 +74,7 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) */ static inline void atomic_set(atomic_t *v, int n) { - _atomic_xchg(v, n); + _atomic_xchg(&v->counter, n); } /* A 64bit atomic type */ @@ -119,11 +85,6 @@ typedef struct { #define ATOMIC64_INIT(val) { (val) } -u64 _atomic64_xchg(atomic64_t *v, u64 n); -u64 _atomic64_xchg_add(atomic64_t *v, u64 i); -u64 _atomic64_xchg_add_unless(atomic64_t *v, u64 a, u64 u); -u64 _atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n); - /** * atomic64_read - read atomic variable * @v: pointer of type atomic64_t @@ -137,35 +98,7 @@ static inline u64 atomic64_read(const atomic64_t *v) * Casting away const is safe since the atomic support routines * do not write to memory if the value has not been modified. */ - return _atomic64_xchg_add((atomic64_t *)v, 0); -} - -/** - * atomic64_xchg - atomically exchange contents of memory with a new value - * @v: pointer of type atomic64_t - * @i: integer value to store in memory - * - * Atomically sets @v to @i and returns old @v - */ -static inline u64 atomic64_xchg(atomic64_t *v, u64 n) -{ - smp_mb(); /* barrier for proper semantics */ - return _atomic64_xchg(v, n); -} - -/** - * atomic64_cmpxchg - atomically exchange contents of memory if it matches - * @v: pointer of type atomic64_t - * @o: old value that memory should have - * @n: new value to write to memory if it matches - * - * Atomically checks if @v holds @o and replaces it with @n if so. - * Returns the old value at @v. - */ -static inline u64 atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n) -{ - smp_mb(); /* barrier for proper semantics */ - return _atomic64_cmpxchg(v, o, n); + return _atomic64_xchg_add((u64 *)&v->counter, 0); } /** @@ -177,7 +110,7 @@ static inline u64 atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n) */ static inline void atomic64_add(u64 i, atomic64_t *v) { - _atomic64_xchg_add(v, i); + _atomic64_xchg_add(&v->counter, i); } /** @@ -190,7 +123,7 @@ static inline void atomic64_add(u64 i, atomic64_t *v) static inline u64 atomic64_add_return(u64 i, atomic64_t *v) { smp_mb(); /* barrier for proper semantics */ - return _atomic64_xchg_add(v, i) + i; + return _atomic64_xchg_add(&v->counter, i) + i; } /** @@ -205,7 +138,7 @@ static inline u64 atomic64_add_return(u64 i, atomic64_t *v) static inline u64 atomic64_add_unless(atomic64_t *v, u64 a, u64 u) { smp_mb(); /* barrier for proper semantics */ - return _atomic64_xchg_add_unless(v, a, u) != u; + return _atomic64_xchg_add_unless(&v->counter, a, u) != u; } /** @@ -220,7 +153,7 @@ static inline u64 atomic64_add_unless(atomic64_t *v, u64 a, u64 u) */ static inline void atomic64_set(atomic64_t *v, u64 n) { - _atomic64_xchg(v, n); + _atomic64_xchg(&v->counter, n); } #define atomic64_add_negative(a, v) (atomic64_add_return((a), (v)) < 0) @@ -252,21 +185,6 @@ static inline void atomic64_set(atomic64_t *v, u64 n) * Internal definitions only beyond this point. */ -#define ATOMIC_LOCKS_FOUND_VIA_TABLE() \ - (!CHIP_HAS_CBOX_HOME_MAP() && defined(CONFIG_SMP)) - -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - -/* Number of entries in atomic_lock_ptr[]. */ -#define ATOMIC_HASH_L1_SHIFT 6 -#define ATOMIC_HASH_L1_SIZE (1 << ATOMIC_HASH_L1_SHIFT) - -/* Number of locks in each struct pointed to by atomic_lock_ptr[]. */ -#define ATOMIC_HASH_L2_SHIFT (CHIP_L2_LOG_LINE_SIZE() - 2) -#define ATOMIC_HASH_L2_SIZE (1 << ATOMIC_HASH_L2_SHIFT) - -#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ - /* * Number of atomic locks in atomic_locks[]. Must be a power of two. * There is no reason for more than PAGE_SIZE / 8 entries, since that @@ -281,8 +199,6 @@ static inline void atomic64_set(atomic64_t *v, u64 n) extern int atomic_locks[]; #endif -#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ - /* * All the code that may fault while holding an atomic lock must * place the pointer to the lock in ATOMIC_LOCK_REG so the fault code diff --git a/arch/tile/include/asm/atomic_64.h b/arch/tile/include/asm/atomic_64.h index f4500c6..ad220ee 100644 --- a/arch/tile/include/asm/atomic_64.h +++ b/arch/tile/include/asm/atomic_64.h @@ -32,25 +32,6 @@ * on any routine which updates memory and returns a value. */ -static inline int atomic_cmpxchg(atomic_t *v, int o, int n) -{ - int val; - __insn_mtspr(SPR_CMPEXCH_VALUE, o); - smp_mb(); /* barrier for proper semantics */ - val = __insn_cmpexch4((void *)&v->counter, n); - smp_mb(); /* barrier for proper semantics */ - return val; -} - -static inline int atomic_xchg(atomic_t *v, int n) -{ - int val; - smp_mb(); /* barrier for proper semantics */ - val = __insn_exch4((void *)&v->counter, n); - smp_mb(); /* barrier for proper semantics */ - return val; -} - static inline void atomic_add(int i, atomic_t *v) { __insn_fetchadd4((void *)&v->counter, i); @@ -72,7 +53,7 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) if (oldval == u) break; guess = oldval; - oldval = atomic_cmpxchg(v, guess, guess + a); + oldval = cmpxchg(&v->counter, guess, guess + a); } while (guess != oldval); return oldval; } @@ -84,25 +65,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) #define atomic64_read(v) ((v)->counter) #define atomic64_set(v, i) ((v)->counter = (i)) -static inline long atomic64_cmpxchg(atomic64_t *v, long o, long n) -{ - long val; - smp_mb(); /* barrier for proper semantics */ - __insn_mtspr(SPR_CMPEXCH_VALUE, o); - val = __insn_cmpexch((void *)&v->counter, n); - smp_mb(); /* barrier for proper semantics */ - return val; -} - -static inline long atomic64_xchg(atomic64_t *v, long n) -{ - long val; - smp_mb(); /* barrier for proper semantics */ - val = __insn_exch((void *)&v->counter, n); - smp_mb(); /* barrier for proper semantics */ - return val; -} - static inline void atomic64_add(long i, atomic64_t *v) { __insn_fetchadd((void *)&v->counter, i); @@ -124,7 +86,7 @@ static inline long atomic64_add_unless(atomic64_t *v, long a, long u) if (oldval == u) break; guess = oldval; - oldval = atomic64_cmpxchg(v, guess, guess + a); + oldval = cmpxchg(&v->counter, guess, guess + a); } while (guess != oldval); return oldval != u; } diff --git a/arch/tile/include/asm/barrier.h b/arch/tile/include/asm/barrier.h index 990a217..a9a73da 100644 --- a/arch/tile/include/asm/barrier.h +++ b/arch/tile/include/asm/barrier.h @@ -77,7 +77,6 @@ #define __sync() __insn_mf() -#if !CHIP_HAS_MF_WAITS_FOR_VICTIMS() #include <hv/syscall_public.h> /* * Issue an uncacheable load to each memory controller, then @@ -96,7 +95,6 @@ static inline void __mb_incoherent(void) "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29"); } -#endif /* Fence to guarantee visibility of stores to incoherent memory. */ static inline void @@ -104,7 +102,6 @@ mb_incoherent(void) { __insn_mf(); -#if !CHIP_HAS_MF_WAITS_FOR_VICTIMS() { #if CHIP_HAS_TILE_WRITE_PENDING() const unsigned long WRITE_TIMEOUT_CYCLES = 400; @@ -116,7 +113,6 @@ mb_incoherent(void) #endif /* CHIP_HAS_TILE_WRITE_PENDING() */ (void) __mb_incoherent(); } -#endif /* CHIP_HAS_MF_WAITS_FOR_VICTIMS() */ } #define fast_wmb() __sync() diff --git a/arch/tile/include/asm/bitops.h b/arch/tile/include/asm/bitops.h index bd186c4..d5a2068 100644 --- a/arch/tile/include/asm/bitops.h +++ b/arch/tile/include/asm/bitops.h @@ -29,17 +29,6 @@ #endif /** - * __ffs - find first set bit in word - * @word: The word to search - * - * Undefined if no set bit exists, so code should check against 0 first. - */ -static inline unsigned long __ffs(unsigned long word) -{ - return __builtin_ctzl(word); -} - -/** * ffz - find first zero bit in word * @word: The word to search * @@ -50,33 +39,6 @@ static inline unsigned long ffz(unsigned long word) return __builtin_ctzl(~word); } -/** - * __fls - find last set bit in word - * @word: The word to search - * - * Undefined if no set bit exists, so code should check against 0 first. - */ -static inline unsigned long __fls(unsigned long word) -{ - return (sizeof(word) * 8) - 1 - __builtin_clzl(word); -} - -/** - * ffs - find first set bit in word - * @x: the word to search - * - * This is defined the same way as the libc and compiler builtin ffs - * routines, therefore differs in spirit from the other bitops. - * - * ffs(value) returns 0 if value is 0 or the position of the first - * set bit if value is nonzero. The first (least significant) bit - * is at position 1. - */ -static inline int ffs(int x) -{ - return __builtin_ffs(x); -} - static inline int fls64(__u64 w) { return (sizeof(__u64) * 8) - __builtin_clzll(w); @@ -118,6 +80,9 @@ static inline unsigned long __arch_hweight64(__u64 w) return __builtin_popcountll(w); } +#include <asm-generic/bitops/builtin-__ffs.h> +#include <asm-generic/bitops/builtin-__fls.h> +#include <asm-generic/bitops/builtin-ffs.h> #include <asm-generic/bitops/const_hweight.h> #include <asm-generic/bitops/lock.h> #include <asm-generic/bitops/find.h> diff --git a/arch/tile/include/asm/bitops_32.h b/arch/tile/include/asm/bitops_32.h index ddc4c1e..386865ad 100644 --- a/arch/tile/include/asm/bitops_32.h +++ b/arch/tile/include/asm/bitops_32.h @@ -16,7 +16,7 @@ #define _ASM_TILE_BITOPS_32_H #include <linux/compiler.h> -#include <linux/atomic.h> +#include <asm/barrier.h> /* Tile-specific routines to support <asm/bitops.h>. */ unsigned long _atomic_or(volatile unsigned long *p, unsigned long mask); diff --git a/arch/tile/include/asm/bitops_64.h b/arch/tile/include/asm/bitops_64.h index 60b87ee..ad34cd0 100644 --- a/arch/tile/include/asm/bitops_64.h +++ b/arch/tile/include/asm/bitops_64.h @@ -16,7 +16,7 @@ #define _ASM_TILE_BITOPS_64_H #include <linux/compiler.h> -#include <linux/atomic.h> +#include <asm/cmpxchg.h> /* See <asm/bitops.h> for API comments. */ @@ -44,8 +44,7 @@ static inline void change_bit(unsigned nr, volatile unsigned long *addr) oldval = *addr; do { guess = oldval; - oldval = atomic64_cmpxchg((atomic64_t *)addr, - guess, guess ^ mask); + oldval = cmpxchg(addr, guess, guess ^ mask); } while (guess != oldval); } @@ -90,8 +89,7 @@ static inline int test_and_change_bit(unsigned nr, oldval = *addr; do { guess = oldval; - oldval = atomic64_cmpxchg((atomic64_t *)addr, - guess, guess ^ mask); + oldval = cmpxchg(addr, guess, guess ^ mask); } while (guess != oldval); return (oldval & mask) != 0; } diff --git a/arch/tile/include/asm/cache.h b/arch/tile/include/asm/cache.h index a9a5299..6160761 100644 --- a/arch/tile/include/asm/cache.h +++ b/arch/tile/include/asm/cache.h @@ -49,9 +49,16 @@ #define __read_mostly __attribute__((__section__(".data..read_mostly"))) /* - * Attribute for data that is kept read/write coherent until the end of - * initialization, then bumped to read/only incoherent for performance. + * Originally we used small TLB pages for kernel data and grouped some + * things together as "write once", enforcing the property at the end + * of initialization by making those pages read-only and non-coherent. + * This allowed better cache utilization since cache inclusion did not + * need to be maintained. However, to do this requires an extra TLB + * entry, which on balance is more of a performance hit than the + * non-coherence is a performance gain, so we now just make "read + * mostly" and "write once" be synonyms. We keep the attribute + * separate in case we change our minds at a future date. */ -#define __write_once __attribute__((__section__(".w1data"))) +#define __write_once __read_mostly #endif /* _ASM_TILE_CACHE_H */ diff --git a/arch/tile/include/asm/cacheflush.h b/arch/tile/include/asm/cacheflush.h index 0fc63c4..92ee4c8 100644 --- a/arch/tile/include/asm/cacheflush.h +++ b/arch/tile/include/asm/cacheflush.h @@ -75,23 +75,6 @@ static inline void copy_to_user_page(struct vm_area_struct *vma, #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy((dst), (src), (len)) -/* - * Invalidate a VA range; pads to L2 cacheline boundaries. - * - * Note that on TILE64, __inv_buffer() actually flushes modified - * cache lines in addition to invalidating them, i.e., it's the - * same as __finv_buffer(). - */ -static inline void __inv_buffer(void *buffer, size_t size) -{ - char *next = (char *)((long)buffer & -L2_CACHE_BYTES); - char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size); - while (next < finish) { - __insn_inv(next); - next += CHIP_INV_STRIDE(); - } -} - /* Flush a VA range; pads to L2 cacheline boundaries. */ static inline void __flush_buffer(void *buffer, size_t size) { @@ -115,13 +98,6 @@ static inline void __finv_buffer(void *buffer, size_t size) } -/* Invalidate a VA range and wait for it to be complete. */ -static inline void inv_buffer(void *buffer, size_t size) -{ - __inv_buffer(buffer, size); - mb(); -} - /* * Flush a locally-homecached VA range and wait for the evicted * cachelines to hit memory. @@ -142,6 +118,26 @@ static inline void finv_buffer_local(void *buffer, size_t size) mb_incoherent(); } +#ifdef __tilepro__ +/* Invalidate a VA range; pads to L2 cacheline boundaries. */ +static inline void __inv_buffer(void *buffer, size_t size) +{ + char *next = (char *)((long)buffer & -L2_CACHE_BYTES); + char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size); + while (next < finish) { + __insn_inv(next); + next += CHIP_INV_STRIDE(); + } +} + +/* Invalidate a VA range and wait for it to be complete. */ +static inline void inv_buffer(void *buffer, size_t size) +{ + __inv_buffer(buffer, size); + mb(); +} +#endif + /* * Flush and invalidate a VA range that is homed remotely, waiting * until the memory controller holds the flushed values. If "hfh" is diff --git a/arch/tile/include/asm/cmpxchg.h b/arch/tile/include/asm/cmpxchg.h index 276f067..4001d5e 100644 --- a/arch/tile/include/asm/cmpxchg.h +++ b/arch/tile/include/asm/cmpxchg.h @@ -20,53 +20,108 @@ #ifndef __ASSEMBLY__ -/* Nonexistent functions intended to cause link errors. */ -extern unsigned long __xchg_called_with_bad_pointer(void); -extern unsigned long __cmpxchg_called_with_bad_pointer(void); +#include <asm/barrier.h> -#define xchg(ptr, x) \ +/* Nonexistent functions intended to cause compile errors. */ +extern void __xchg_called_with_bad_pointer(void) + __compiletime_error("Bad argument size for xchg"); +extern void __cmpxchg_called_with_bad_pointer(void) + __compiletime_error("Bad argument size for cmpxchg"); + +#ifndef __tilegx__ + +/* Note the _atomic_xxx() routines include a final mb(). */ +int _atomic_xchg(int *ptr, int n); +int _atomic_xchg_add(int *v, int i); +int _atomic_xchg_add_unless(int *v, int a, int u); +int _atomic_cmpxchg(int *ptr, int o, int n); +u64 _atomic64_xchg(u64 *v, u64 n); +u64 _atomic64_xchg_add(u64 *v, u64 i); +u64 _atomic64_xchg_add_unless(u64 *v, u64 a, u64 u); +u64 _atomic64_cmpxchg(u64 *v, u64 o, u64 n); + +#define xchg(ptr, n) \ + ({ \ + if (sizeof(*(ptr)) != 4) \ + __xchg_called_with_bad_pointer(); \ + smp_mb(); \ + (typeof(*(ptr)))_atomic_xchg((int *)(ptr), (int)(n)); \ + }) + +#define cmpxchg(ptr, o, n) \ + ({ \ + if (sizeof(*(ptr)) != 4) \ + __cmpxchg_called_with_bad_pointer(); \ + smp_mb(); \ + (typeof(*(ptr)))_atomic_cmpxchg((int *)ptr, (int)o, (int)n); \ + }) + +#define xchg64(ptr, n) \ + ({ \ + if (sizeof(*(ptr)) != 8) \ + __xchg_called_with_bad_pointer(); \ + smp_mb(); \ + (typeof(*(ptr)))_atomic64_xchg((u64 *)(ptr), (u64)(n)); \ + }) + +#define cmpxchg64(ptr, o, n) \ + ({ \ + if (sizeof(*(ptr)) != 8) \ + __cmpxchg_called_with_bad_pointer(); \ + smp_mb(); \ + (typeof(*(ptr)))_atomic64_cmpxchg((u64 *)ptr, (u64)o, (u64)n); \ + }) + +#else + +#define xchg(ptr, n) \ ({ \ typeof(*(ptr)) __x; \ + smp_mb(); \ switch (sizeof(*(ptr))) { \ case 4: \ - __x = (typeof(__x))(typeof(__x-__x))atomic_xchg( \ - (atomic_t *)(ptr), \ - (u32)(typeof((x)-(x)))(x)); \ + __x = (typeof(__x))(unsigned long) \ + __insn_exch4((ptr), (u32)(unsigned long)(n)); \ break; \ case 8: \ - __x = (typeof(__x))(typeof(__x-__x))atomic64_xchg( \ - (atomic64_t *)(ptr), \ - (u64)(typeof((x)-(x)))(x)); \ + __x = (typeof(__x)) \ + __insn_exch((ptr), (unsigned long)(n)); \ break; \ default: \ __xchg_called_with_bad_pointer(); \ + break; \ } \ + smp_mb(); \ __x; \ }) #define cmpxchg(ptr, o, n) \ ({ \ typeof(*(ptr)) __x; \ + __insn_mtspr(SPR_CMPEXCH_VALUE, (unsigned long)(o)); \ + smp_mb(); \ switch (sizeof(*(ptr))) { \ case 4: \ - __x = (typeof(__x))(typeof(__x-__x))atomic_cmpxchg( \ - (atomic_t *)(ptr), \ - (u32)(typeof((o)-(o)))(o), \ - (u32)(typeof((n)-(n)))(n)); \ + __x = (typeof(__x))(unsigned long) \ + __insn_cmpexch4((ptr), (u32)(unsigned long)(n)); \ break; \ case 8: \ - __x = (typeof(__x))(typeof(__x-__x))atomic64_cmpxchg( \ - (atomic64_t *)(ptr), \ - (u64)(typeof((o)-(o)))(o), \ - (u64)(typeof((n)-(n)))(n)); \ + __x = (typeof(__x))__insn_cmpexch((ptr), (u64)(n)); \ break; \ default: \ __cmpxchg_called_with_bad_pointer(); \ + break; \ } \ + smp_mb(); \ __x; \ }) -#define tas(ptr) (xchg((ptr), 1)) +#define xchg64 xchg +#define cmpxchg64 cmpxchg + +#endif + +#define tas(ptr) xchg((ptr), 1) #endif /* __ASSEMBLY__ */ diff --git a/arch/tile/include/asm/device.h b/arch/tile/include/asm/device.h index 5182705..6ab8bf1 100644 --- a/arch/tile/include/asm/device.h +++ b/arch/tile/include/asm/device.h @@ -23,7 +23,10 @@ struct dev_archdata { /* Offset of the DMA address from the PA. */ dma_addr_t dma_offset; - /* Highest DMA address that can be generated by this device. */ + /* + * Highest DMA address that can be generated by devices that + * have limited DMA capability, i.e. non 64-bit capable. + */ dma_addr_t max_direct_dma_addr; }; diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h index f2ff191..1eae359 100644 --- a/arch/tile/include/asm/dma-mapping.h +++ b/arch/tile/include/asm/dma-mapping.h @@ -20,9 +20,14 @@ #include <linux/cache.h> #include <linux/io.h> +#ifdef __tilegx__ +#define ARCH_HAS_DMA_GET_REQUIRED_MASK +#endif + extern struct dma_map_ops *tile_dma_map_ops; extern struct dma_map_ops *gx_pci_dma_map_ops; extern struct dma_map_ops *gx_legacy_pci_dma_map_ops; +extern struct dma_map_ops *gx_hybrid_pci_dma_map_ops; static inline struct dma_map_ops *get_dma_ops(struct device *dev) { @@ -44,12 +49,12 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off) static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { - return paddr + get_dma_offset(dev); + return paddr; } static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) { - return daddr - get_dma_offset(dev); + return daddr; } static inline void dma_mark_clean(void *addr, size_t size) {} @@ -87,11 +92,19 @@ dma_set_mask(struct device *dev, u64 mask) { struct dma_map_ops *dma_ops = get_dma_ops(dev); - /* Handle legacy PCI devices with limited memory addressability. */ - if ((dma_ops == gx_pci_dma_map_ops) && (mask <= DMA_BIT_MASK(32))) { - set_dma_ops(dev, gx_legacy_pci_dma_map_ops); - set_dma_offset(dev, 0); - if (mask > dev->archdata.max_direct_dma_addr) + /* + * For PCI devices with 64-bit DMA addressing capability, promote + * the dma_ops to hybrid, with the consistent memory DMA space limited + * to 32-bit. For 32-bit capable devices, limit the streaming DMA + * address range to max_direct_dma_addr. + */ + if (dma_ops == gx_pci_dma_map_ops || + dma_ops == gx_hybrid_pci_dma_map_ops || + dma_ops == gx_legacy_pci_dma_map_ops) { + if (mask == DMA_BIT_MASK(64) && + dma_ops == gx_legacy_pci_dma_map_ops) + set_dma_ops(dev, gx_hybrid_pci_dma_map_ops); + else if (mask > dev->archdata.max_direct_dma_addr) mask = dev->archdata.max_direct_dma_addr; } diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h index ff8a934..41d9878 100644 --- a/arch/tile/include/asm/elf.h +++ b/arch/tile/include/asm/elf.h @@ -30,7 +30,6 @@ typedef unsigned long elf_greg_t; #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t)) typedef elf_greg_t elf_gregset_t[ELF_NGREG]; -#define EM_TILE64 187 #define EM_TILEPRO 188 #define EM_TILEGX 191 @@ -132,6 +131,15 @@ extern int dump_task_regs(struct task_struct *, elf_gregset_t *); struct linux_binprm; extern int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack); +#define ARCH_DLINFO \ +do { \ + NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \ +} while (0) + +struct mm_struct; +extern unsigned long arch_randomize_brk(struct mm_struct *mm); +#define arch_randomize_brk arch_randomize_brk + #ifdef CONFIG_COMPAT #define COMPAT_ELF_PLATFORM "tilegx-m32" diff --git a/arch/tile/include/asm/fixmap.h b/arch/tile/include/asm/fixmap.h index e16dbf9..c6b9c1b 100644 --- a/arch/tile/include/asm/fixmap.h +++ b/arch/tile/include/asm/fixmap.h @@ -78,14 +78,6 @@ enum fixed_addresses { #endif }; -extern void __set_fixmap(enum fixed_addresses idx, - unsigned long phys, pgprot_t flags); - -#define set_fixmap(idx, phys) \ - __set_fixmap(idx, phys, PAGE_KERNEL) -#define clear_fixmap(idx) \ - __set_fixmap(idx, 0, __pgprot(0)) - #define __FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT) #define __FIXADDR_BOOT_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP + PAGE_SIZE - __FIXADDR_SIZE) diff --git a/arch/tile/include/asm/ftrace.h b/arch/tile/include/asm/ftrace.h index 461459b..13a9bb8 100644 --- a/arch/tile/include/asm/ftrace.h +++ b/arch/tile/include/asm/ftrace.h @@ -15,6 +15,26 @@ #ifndef _ASM_TILE_FTRACE_H #define _ASM_TILE_FTRACE_H -/* empty */ +#ifdef CONFIG_FUNCTION_TRACER + +#define MCOUNT_ADDR ((unsigned long)(__mcount)) +#define MCOUNT_INSN_SIZE 8 /* sizeof mcount call */ + +#ifndef __ASSEMBLY__ +extern void __mcount(void); + +#ifdef CONFIG_DYNAMIC_FTRACE +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + return addr; +} + +struct dyn_arch_ftrace { +}; +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#endif /* __ASSEMBLY__ */ + +#endif /* CONFIG_FUNCTION_TRACER */ #endif /* _ASM_TILE_FTRACE_H */ diff --git a/arch/tile/include/asm/futex.h b/arch/tile/include/asm/futex.h index 5909ac3..1a6ef1b 100644 --- a/arch/tile/include/asm/futex.h +++ b/arch/tile/include/asm/futex.h @@ -43,6 +43,7 @@ ".pushsection .fixup,\"ax\"\n" \ "0: { movei %0, %5; j 9f }\n" \ ".section __ex_table,\"a\"\n" \ + ".align 8\n" \ ".quad 1b, 0b\n" \ ".popsection\n" \ "9:" \ diff --git a/arch/tile/include/asm/homecache.h b/arch/tile/include/asm/homecache.h index 7b77713..7ddd1b8 100644 --- a/arch/tile/include/asm/homecache.h +++ b/arch/tile/include/asm/homecache.h @@ -33,8 +33,7 @@ struct zone; /* * Is this page immutable (unwritable) and thus able to be cached more - * widely than would otherwise be possible? On tile64 this means we - * mark the PTE to cache locally; on tilepro it means we have "nc" set. + * widely than would otherwise be possible? This means we have "nc" set. */ #define PAGE_HOME_IMMUTABLE -2 @@ -44,16 +43,8 @@ struct zone; */ #define PAGE_HOME_INCOHERENT -3 -#if CHIP_HAS_CBOX_HOME_MAP() /* Home for the page is distributed via hash-for-home. */ #define PAGE_HOME_HASH -4 -#endif - -/* Homing is unknown or unspecified. Not valid for page_home(). */ -#define PAGE_HOME_UNKNOWN -5 - -/* Home on the current cpu. Not valid for page_home(). */ -#define PAGE_HOME_HERE -6 /* Support wrapper to use instead of explicit hv_flush_remote(). */ extern void flush_remote(unsigned long cache_pfn, unsigned long cache_length, diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h index 3167291..9fe4349 100644 --- a/arch/tile/include/asm/io.h +++ b/arch/tile/include/asm/io.h @@ -19,7 +19,8 @@ #include <linux/bug.h> #include <asm/page.h> -#define IO_SPACE_LIMIT 0xfffffffful +/* Maximum PCI I/O space address supported. */ +#define IO_SPACE_LIMIT 0xffffffff /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem @@ -254,7 +255,7 @@ static inline void writeq(u64 val, unsigned long addr) static inline void memset_io(volatile void *dst, int val, size_t len) { - int x; + size_t x; BUG_ON((unsigned long)dst & 0x3); val = (val & 0xff) * 0x01010101; for (x = 0; x < len; x += 4) @@ -264,7 +265,7 @@ static inline void memset_io(volatile void *dst, int val, size_t len) static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, size_t len) { - int x; + size_t x; BUG_ON((unsigned long)src & 0x3); for (x = 0; x < len; x += 4) *(u32 *)(dst + x) = readl(src + x); @@ -273,7 +274,7 @@ static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, static inline void memcpy_toio(volatile void __iomem *dst, const void *src, size_t len) { - int x; + size_t x; BUG_ON((unsigned long)dst & 0x3); for (x = 0; x < len; x += 4) writel(*(u32 *)(src + x), dst + x); @@ -281,8 +282,108 @@ static inline void memcpy_toio(volatile void __iomem *dst, const void *src, #endif +#if CHIP_HAS_MMIO() && defined(CONFIG_TILE_PCI_IO) + +static inline u8 inb(unsigned long addr) +{ + return readb((volatile void __iomem *) addr); +} + +static inline u16 inw(unsigned long addr) +{ + return readw((volatile void __iomem *) addr); +} + +static inline u32 inl(unsigned long addr) +{ + return readl((volatile void __iomem *) addr); +} + +static inline void outb(u8 b, unsigned long addr) +{ + writeb(b, (volatile void __iomem *) addr); +} + +static inline void outw(u16 b, unsigned long addr) +{ + writew(b, (volatile void __iomem *) addr); +} + +static inline void outl(u32 b, unsigned long addr) +{ + writel(b, (volatile void __iomem *) addr); +} + +static inline void insb(unsigned long addr, void *buffer, int count) +{ + if (count) { + u8 *buf = buffer; + do { + u8 x = inb(addr); + *buf++ = x; + } while (--count); + } +} + +static inline void insw(unsigned long addr, void *buffer, int count) +{ + if (count) { + u16 *buf = buffer; + do { + u16 x = inw(addr); + *buf++ = x; + } while (--count); + } +} + +static inline void insl(unsigned long addr, void *buffer, int count) +{ + if (count) { + u32 *buf = buffer; + do { + u32 x = inl(addr); + *buf++ = x; + } while (--count); + } +} + +static inline void outsb(unsigned long addr, const void *buffer, int count) +{ + if (count) { + const u8 *buf = buffer; + do { + outb(*buf++, addr); + } while (--count); + } +} + +static inline void outsw(unsigned long addr, const void *buffer, int count) +{ + if (count) { + const u16 *buf = buffer; + do { + outw(*buf++, addr); + } while (--count); + } +} + +static inline void outsl(unsigned long addr, const void *buffer, int count) +{ + if (count) { + const u32 *buf = buffer; + do { + outl(*buf++, addr); + } while (--count); + } +} + +extern void __iomem *ioport_map(unsigned long port, unsigned int len); +extern void ioport_unmap(void __iomem *addr); + +#else + /* - * The Tile architecture does not support IOPORT, even with PCI. + * The TilePro architecture does not support IOPORT, even with PCI. * Unfortunately we can't yet simply not declare these methods, * since some generic code that compiles into the kernel, but * we never run, uses them unconditionally. @@ -290,7 +391,12 @@ static inline void memcpy_toio(volatile void __iomem *dst, const void *src, static inline long ioport_panic(void) { +#ifdef __tilegx__ + panic("PCI IO space support is disabled. Configure the kernel with" + " CONFIG_TILE_PCI_IO to enable it"); +#else panic("inb/outb and friends do not exist on tile"); +#endif return 0; } @@ -335,13 +441,6 @@ static inline void outl(u32 b, unsigned long addr) ioport_panic(); } -#define inb_p(addr) inb(addr) -#define inw_p(addr) inw(addr) -#define inl_p(addr) inl(addr) -#define outb_p(x, addr) outb((x), (addr)) -#define outw_p(x, addr) outw((x), (addr)) -#define outl_p(x, addr) outl((x), (addr)) - static inline void insb(unsigned long addr, void *buffer, int count) { ioport_panic(); @@ -372,6 +471,15 @@ static inline void outsl(unsigned long addr, const void *buffer, int count) ioport_panic(); } +#endif /* CHIP_HAS_MMIO() && defined(CONFIG_TILE_PCI_IO) */ + +#define inb_p(addr) inb(addr) +#define inw_p(addr) inw(addr) +#define inl_p(addr) inl(addr) +#define outb_p(x, addr) outb((x), (addr)) +#define outw_p(x, addr) outw((x), (addr)) +#define outl_p(x, addr) outl((x), (addr)) + #define ioread16be(addr) be16_to_cpu(ioread16(addr)) #define ioread32be(addr) be32_to_cpu(ioread32(addr)) #define iowrite16be(v, addr) iowrite16(be16_to_cpu(v), (addr)) diff --git a/arch/tile/include/asm/irqflags.h b/arch/tile/include/asm/irqflags.h index c96f9bb..71af574 100644 --- a/arch/tile/include/asm/irqflags.h +++ b/arch/tile/include/asm/irqflags.h @@ -124,6 +124,12 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); #define INITIAL_INTERRUPTS_ENABLED (1ULL << INT_MEM_ERROR) +#ifdef CONFIG_DEBUG_PREEMPT +/* Due to inclusion issues, we can't rely on <linux/smp.h> here. */ +extern unsigned int debug_smp_processor_id(void); +# define smp_processor_id() debug_smp_processor_id() +#endif + /* Disable interrupts. */ #define arch_local_irq_disable() \ interrupt_mask_set_mask(LINUX_MASKABLE_INTERRUPTS) @@ -132,9 +138,18 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); #define arch_local_irq_disable_all() \ interrupt_mask_set_mask(-1ULL) +/* + * Read the set of maskable interrupts. + * We avoid the preemption warning here via __this_cpu_ptr since even + * if irqs are already enabled, it's harmless to read the wrong cpu's + * enabled mask. + */ +#define arch_local_irqs_enabled() \ + (*__this_cpu_ptr(&interrupts_enabled_mask)) + /* Re-enable all maskable interrupts. */ #define arch_local_irq_enable() \ - interrupt_mask_reset_mask(__get_cpu_var(interrupts_enabled_mask)) + interrupt_mask_reset_mask(arch_local_irqs_enabled()) /* Disable or enable interrupts based on flag argument. */ #define arch_local_irq_restore(disabled) do { \ @@ -161,7 +176,7 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); /* Prevent the given interrupt from being enabled next time we enable irqs. */ #define arch_local_irq_mask(interrupt) \ - (__get_cpu_var(interrupts_enabled_mask) &= ~(1ULL << (interrupt))) + this_cpu_and(interrupts_enabled_mask, ~(1ULL << (interrupt))) /* Prevent the given interrupt from being enabled immediately. */ #define arch_local_irq_mask_now(interrupt) do { \ @@ -171,7 +186,7 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); /* Allow the given interrupt to be enabled next time we enable irqs. */ #define arch_local_irq_unmask(interrupt) \ - (__get_cpu_var(interrupts_enabled_mask) |= (1ULL << (interrupt))) + this_cpu_or(interrupts_enabled_mask, (1ULL << (interrupt))) /* Allow the given interrupt to be enabled immediately, if !irqs_disabled. */ #define arch_local_irq_unmask_now(interrupt) do { \ diff --git a/arch/tile/include/asm/hw_irq.h b/arch/tile/include/asm/kdebug.h index 4fac5fbf..5bbbfa9 100644 --- a/arch/tile/include/asm/hw_irq.h +++ b/arch/tile/include/asm/kdebug.h @@ -1,5 +1,5 @@ /* - * Copyright 2010 Tilera Corporation. All Rights Reserved. + * Copyright 2012 Tilera Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -12,7 +12,17 @@ * more details. */ -#ifndef _ASM_TILE_HW_IRQ_H -#define _ASM_TILE_HW_IRQ_H +#ifndef _ASM_TILE_KDEBUG_H +#define _ASM_TILE_KDEBUG_H -#endif /* _ASM_TILE_HW_IRQ_H */ +#include <linux/notifier.h> + +enum die_val { + DIE_OOPS = 1, + DIE_BREAK, + DIE_SSTEPBP, + DIE_PAGE_FAULT, + DIE_COMPILED_BPT +}; + +#endif /* _ASM_TILE_KDEBUG_H */ diff --git a/arch/tile/include/asm/kgdb.h b/arch/tile/include/asm/kgdb.h new file mode 100644 index 0000000..280c181 --- /dev/null +++ b/arch/tile/include/asm/kgdb.h @@ -0,0 +1,71 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * TILE-Gx KGDB support. + */ + +#ifndef __TILE_KGDB_H__ +#define __TILE_KGDB_H__ + +#include <linux/kdebug.h> +#include <arch/opcode.h> + +#define GDB_SIZEOF_REG sizeof(unsigned long) + +/* + * TILE-Gx gdb is expecting the following register layout: + * 56 GPRs(R0 - R52, TP, SP, LR), 8 special GPRs(networks and ZERO), + * plus the PC and the faultnum. + * + * Even though kernel not use the 8 special GPRs, they need to be present + * in the registers sent for correct processing in the host-side gdb. + * + */ +#define DBG_MAX_REG_NUM (56+8+2) +#define NUMREGBYTES (DBG_MAX_REG_NUM * GDB_SIZEOF_REG) + +/* + * BUFMAX defines the maximum number of characters in inbound/outbound + * buffers at least NUMREGBYTES*2 are needed for register packets, + * Longer buffer is needed to list all threads. + */ +#define BUFMAX 2048 + +#define BREAK_INSTR_SIZE TILEGX_BUNDLE_SIZE_IN_BYTES + +/* + * Require cache flush for set/clear a software breakpoint or write memory. + */ +#define CACHE_FLUSH_IS_SAFE 1 + +/* + * The compiled-in breakpoint instruction can be used to "break" into + * the debugger via magic system request key (sysrq-G). + */ +static tile_bundle_bits compiled_bpt = TILEGX_BPT_BUNDLE | DIE_COMPILED_BPT; + +enum tilegx_regnum { + TILEGX_PC_REGNUM = TREG_LAST_GPR + 9, + TILEGX_FAULTNUM_REGNUM, +}; + +/* + * Generate a breakpoint exception to "break" into the debugger. + */ +static inline void arch_kgdb_breakpoint(void) +{ + asm volatile (".quad %0\n\t" + ::""(compiled_bpt)); +} + +#endif /* __TILE_KGDB_H__ */ diff --git a/arch/tile/include/asm/kprobes.h b/arch/tile/include/asm/kprobes.h new file mode 100644 index 0000000..d8f9a83 --- /dev/null +++ b/arch/tile/include/asm/kprobes.h @@ -0,0 +1,79 @@ +/* + * arch/tile/include/asm/kprobes.h + * + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _ASM_TILE_KPROBES_H +#define _ASM_TILE_KPROBES_H + +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/percpu.h> + +#include <arch/opcode.h> + +#define __ARCH_WANT_KPROBES_INSN_SLOT +#define MAX_INSN_SIZE 2 + +#define kretprobe_blacklist_size 0 + +typedef tile_bundle_bits kprobe_opcode_t; + +#define flush_insn_slot(p) \ + flush_icache_range((unsigned long)p->addr, \ + (unsigned long)p->addr + \ + (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))) + +struct kprobe; + +/* Architecture specific copy of original instruction. */ +struct arch_specific_insn { + kprobe_opcode_t *insn; +}; + +struct prev_kprobe { + struct kprobe *kp; + unsigned long status; + unsigned long saved_pc; +}; + +#define MAX_JPROBES_STACK_SIZE 128 +#define MAX_JPROBES_STACK_ADDR \ + (((unsigned long)current_thread_info()) + THREAD_SIZE - 32 \ + - sizeof(struct pt_regs)) + +#define MIN_JPROBES_STACK_SIZE(ADDR) \ + ((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \ + ? MAX_JPROBES_STACK_ADDR - (ADDR) \ + : MAX_JPROBES_STACK_SIZE) + +/* per-cpu kprobe control block. */ +struct kprobe_ctlblk { + unsigned long kprobe_status; + unsigned long kprobe_saved_pc; + unsigned long jprobe_saved_sp; + struct prev_kprobe prev_kprobe; + struct pt_regs jprobe_saved_regs; + char jprobes_stack[MAX_JPROBES_STACK_SIZE]; +}; + +extern tile_bundle_bits breakpoint2_insn; +extern tile_bundle_bits breakpoint_insn; + +void arch_remove_kprobe(struct kprobe *); + +extern int kprobe_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data); + +#endif /* _ASM_TILE_KPROBES_H */ diff --git a/arch/tile/include/asm/mmu.h b/arch/tile/include/asm/mmu.h index e2c7890..0cab118 100644 --- a/arch/tile/include/asm/mmu.h +++ b/arch/tile/include/asm/mmu.h @@ -22,6 +22,7 @@ struct mm_context { * semaphore but atomically, but it is conservatively set. */ unsigned long priority_cached; + unsigned long vdso_base; }; typedef struct mm_context mm_context_t; diff --git a/arch/tile/include/asm/mmu_context.h b/arch/tile/include/asm/mmu_context.h index 37f0b74..4734215 100644 --- a/arch/tile/include/asm/mmu_context.h +++ b/arch/tile/include/asm/mmu_context.h @@ -45,7 +45,7 @@ static inline void __install_page_table(pgd_t *pgdir, int asid, pgprot_t prot) static inline void install_page_table(pgd_t *pgdir, int asid) { - pte_t *ptep = virt_to_pte(NULL, (unsigned long)pgdir); + pte_t *ptep = virt_to_kpte((unsigned long)pgdir); __install_page_table(pgdir, asid, *ptep); } diff --git a/arch/tile/include/asm/mmzone.h b/arch/tile/include/asm/mmzone.h index 9d3dbce..804f109 100644 --- a/arch/tile/include/asm/mmzone.h +++ b/arch/tile/include/asm/mmzone.h @@ -42,7 +42,7 @@ static inline int pfn_to_nid(unsigned long pfn) #define kern_addr_valid(kaddr) virt_addr_valid((void *)kaddr) -static inline int pfn_valid(int pfn) +static inline int pfn_valid(unsigned long pfn) { int nid = pfn_to_nid(pfn); diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h index dd033a4..6346888 100644 --- a/arch/tile/include/asm/page.h +++ b/arch/tile/include/asm/page.h @@ -39,6 +39,12 @@ #define HPAGE_MASK (~(HPAGE_SIZE - 1)) /* + * We do define AT_SYSINFO_EHDR to support vDSO, + * but don't use the gate mechanism. + */ +#define __HAVE_ARCH_GATE_AREA 1 + +/* * If the Kconfig doesn't specify, set a maximum zone order that * is enough so that we can create huge pages from small pages given * the respective sizes of the two page types. See <linux/mmzone.h>. @@ -142,8 +148,12 @@ static inline __attribute_const__ int get_order(unsigned long size) #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #endif +/* Allow overriding how much VA or PA the kernel will use. */ +#define MAX_PA_WIDTH CHIP_PA_WIDTH() +#define MAX_VA_WIDTH CHIP_VA_WIDTH() + /* Each memory controller has PAs distinct in their high bits. */ -#define NR_PA_HIGHBIT_SHIFT (CHIP_PA_WIDTH() - CHIP_LOG_NUM_MSHIMS()) +#define NR_PA_HIGHBIT_SHIFT (MAX_PA_WIDTH - CHIP_LOG_NUM_MSHIMS()) #define NR_PA_HIGHBIT_VALUES (1 << CHIP_LOG_NUM_MSHIMS()) #define __pa_to_highbits(pa) ((phys_addr_t)(pa) >> NR_PA_HIGHBIT_SHIFT) #define __pfn_to_highbits(pfn) ((pfn) >> (NR_PA_HIGHBIT_SHIFT - PAGE_SHIFT)) @@ -154,7 +164,7 @@ static inline __attribute_const__ int get_order(unsigned long size) * We reserve the lower half of memory for user-space programs, and the * upper half for system code. We re-map all of physical memory in the * upper half, which takes a quarter of our VA space. Then we have - * the vmalloc regions. The supervisor code lives at 0xfffffff700000000, + * the vmalloc regions. The supervisor code lives at the highest address, * with the hypervisor above that. * * Loadable kernel modules are placed immediately after the static @@ -166,26 +176,19 @@ static inline __attribute_const__ int get_order(unsigned long size) * Similarly, for now we don't play any struct page mapping games. */ -#if CHIP_PA_WIDTH() + 2 > CHIP_VA_WIDTH() +#if MAX_PA_WIDTH + 2 > MAX_VA_WIDTH # error Too much PA to map with the VA available! #endif -#define HALF_VA_SPACE (_AC(1, UL) << (CHIP_VA_WIDTH() - 1)) -#define MEM_LOW_END (HALF_VA_SPACE - 1) /* low half */ -#define MEM_HIGH_START (-HALF_VA_SPACE) /* high half */ -#define PAGE_OFFSET MEM_HIGH_START -#define FIXADDR_BASE _AC(0xfffffff400000000, UL) /* 4 GB */ -#define FIXADDR_TOP _AC(0xfffffff500000000, UL) /* 4 GB */ +#define PAGE_OFFSET (-(_AC(1, UL) << (MAX_VA_WIDTH - 1))) +#define KERNEL_HIGH_VADDR _AC(0xfffffff800000000, UL) /* high 32GB */ +#define FIXADDR_BASE (KERNEL_HIGH_VADDR - 0x400000000) /* 4 GB */ +#define FIXADDR_TOP (KERNEL_HIGH_VADDR - 0x300000000) /* 4 GB */ #define _VMALLOC_START FIXADDR_TOP -#define HUGE_VMAP_BASE _AC(0xfffffff600000000, UL) /* 4 GB */ -#define MEM_SV_START _AC(0xfffffff700000000, UL) /* 256 MB */ -#define MEM_SV_INTRPT MEM_SV_START -#define MEM_MODULE_START _AC(0xfffffff710000000, UL) /* 256 MB */ +#define HUGE_VMAP_BASE (KERNEL_HIGH_VADDR - 0x200000000) /* 4 GB */ +#define MEM_SV_START (KERNEL_HIGH_VADDR - 0x100000000) /* 256 MB */ +#define MEM_MODULE_START (MEM_SV_START + (256*1024*1024)) /* 256 MB */ #define MEM_MODULE_END (MEM_MODULE_START + (256*1024*1024)) -#define MEM_HV_START _AC(0xfffffff800000000, UL) /* 32 GB */ - -/* Highest DTLB address we will use */ -#define KERNEL_HIGH_VADDR MEM_SV_START #else /* !__tilegx__ */ @@ -207,25 +210,18 @@ static inline __attribute_const__ int get_order(unsigned long size) * values, and after that, we show "typical" values, since the actual * addresses depend on kernel #defines. * - * MEM_HV_INTRPT 0xfe000000 - * MEM_SV_INTRPT (kernel code) 0xfd000000 + * MEM_HV_START 0xfe000000 + * MEM_SV_START (kernel code) 0xfd000000 * MEM_USER_INTRPT (user vector) 0xfc000000 - * FIX_KMAP_xxx 0xf8000000 (via NR_CPUS * KM_TYPE_NR) - * PKMAP_BASE 0xf7000000 (via LAST_PKMAP) - * HUGE_VMAP 0xf3000000 (via CONFIG_NR_HUGE_VMAPS) - * VMALLOC_START 0xf0000000 (via __VMALLOC_RESERVE) + * FIX_KMAP_xxx 0xfa000000 (via NR_CPUS * KM_TYPE_NR) + * PKMAP_BASE 0xf9000000 (via LAST_PKMAP) + * VMALLOC_START 0xf7000000 (via VMALLOC_RESERVE) * mapped LOWMEM 0xc0000000 */ #define MEM_USER_INTRPT _AC(0xfc000000, UL) -#if CONFIG_KERNEL_PL == 1 -#define MEM_SV_INTRPT _AC(0xfd000000, UL) -#define MEM_HV_INTRPT _AC(0xfe000000, UL) -#else -#define MEM_GUEST_INTRPT _AC(0xfd000000, UL) -#define MEM_SV_INTRPT _AC(0xfe000000, UL) -#define MEM_HV_INTRPT _AC(0xff000000, UL) -#endif +#define MEM_SV_START _AC(0xfd000000, UL) +#define MEM_HV_START _AC(0xfe000000, UL) #define INTRPT_SIZE 0x4000 @@ -246,7 +242,7 @@ static inline __attribute_const__ int get_order(unsigned long size) #endif /* __tilegx__ */ -#ifndef __ASSEMBLY__ +#if !defined(__ASSEMBLY__) && !defined(VDSO_BUILD) #ifdef CONFIG_HIGHMEM @@ -332,6 +328,7 @@ static inline int pfn_valid(unsigned long pfn) struct mm_struct; extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr); +extern pte_t *virt_to_kpte(unsigned long kaddr); #endif /* !__ASSEMBLY__ */ diff --git a/arch/tile/include/asm/pci.h b/arch/tile/include/asm/pci.h index 54a9242..dfedd7a 100644 --- a/arch/tile/include/asm/pci.h +++ b/arch/tile/include/asm/pci.h @@ -17,7 +17,6 @@ #include <linux/dma-mapping.h> #include <linux/pci.h> -#include <linux/numa.h> #include <asm-generic/pci_iomap.h> #ifndef __tilegx__ @@ -29,7 +28,6 @@ struct pci_controller { int index; /* PCI domain number */ struct pci_bus *root_bus; - int first_busno; int last_busno; int hv_cfg_fd[2]; /* config{0,1} fds for this PCIe controller */ @@ -124,6 +122,11 @@ static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) {} * the CPA plus TILE_PCI_MEM_MAP_BASE_OFFSET. To support 32-bit * devices, we create a separate map region that handles the low * 4GB. + * + * This design lets us avoid the "PCI hole" problem where the host bridge + * won't pass DMA traffic with target addresses that happen to fall within the + * BAR space. This enables us to use all the physical memory for DMA, instead + * of wasting the same amount of physical memory as the BAR window size. */ #define TILE_PCI_MEM_MAP_BASE_OFFSET (1ULL << CHIP_PA_WIDTH()) @@ -145,6 +148,10 @@ struct pci_controller { int pio_mem_index; /* PIO region index for memory access */ +#ifdef CONFIG_TILE_PCI_IO + int pio_io_index; /* PIO region index for I/O space access */ +#endif + /* * Mem-Map regions for all the memory controllers so that Linux can * map all of its physical memory space to the PCI bus. @@ -154,6 +161,10 @@ struct pci_controller { int index; /* PCI domain number */ struct pci_bus *root_bus; + /* PCI I/O space resource for this controller. */ + struct resource io_space; + char io_space_name[32]; + /* PCI memory space resource for this controller. */ struct resource mem_space; char mem_space_name[32]; @@ -166,13 +177,11 @@ struct pci_controller { /* Table that maps the INTx numbers to Linux irq numbers. */ int irq_intx_table[4]; - - /* Address ranges that are routed to this controller/bridge. */ - struct resource mem_resources[3]; }; extern struct pci_controller pci_controllers[TILEGX_NUM_TRIO * TILEGX_TRIO_PCIES]; extern gxio_trio_context_t trio_contexts[TILEGX_NUM_TRIO]; +extern int num_trio_shims; extern void pci_iounmap(struct pci_dev *dev, void __iomem *); @@ -211,7 +220,8 @@ static inline int pcibios_assign_all_busses(void) } #define PCIBIOS_MIN_MEM 0 -#define PCIBIOS_MIN_IO 0 +/* Minimum PCI I/O address, starting at the page boundary. */ +#define PCIBIOS_MIN_IO PAGE_SIZE /* Use any cpu for PCI. */ #define cpumask_of_pcibus(bus) cpu_online_mask diff --git a/arch/tile/include/asm/pgtable_32.h b/arch/tile/include/asm/pgtable_32.h index 4ce4a7a..63142ab 100644 --- a/arch/tile/include/asm/pgtable_32.h +++ b/arch/tile/include/asm/pgtable_32.h @@ -84,10 +84,12 @@ extern unsigned long VMALLOC_RESERVE /* = CONFIG_VMALLOC_RESERVE */; /* We have no pmd or pud since we are strictly a two-level page table */ #include <asm-generic/pgtable-nopmd.h> +static inline int pud_huge_page(pud_t pud) { return 0; } + /* We don't define any pgds for these addresses. */ static inline int pgd_addr_invalid(unsigned long addr) { - return addr >= MEM_HV_INTRPT; + return addr >= MEM_HV_START; } /* diff --git a/arch/tile/include/asm/pgtable_64.h b/arch/tile/include/asm/pgtable_64.h index 2492fa5..3421177 100644 --- a/arch/tile/include/asm/pgtable_64.h +++ b/arch/tile/include/asm/pgtable_64.h @@ -63,6 +63,15 @@ /* We have no pud since we are a three-level page table. */ #include <asm-generic/pgtable-nopud.h> +/* + * pmds are the same as pgds and ptes, so converting is a no-op. + */ +#define pmd_pte(pmd) (pmd) +#define pmdp_ptep(pmdp) (pmdp) +#define pte_pmd(pte) (pte) + +#define pud_pte(pud) ((pud).pgd) + static inline int pud_none(pud_t pud) { return pud_val(pud) == 0; @@ -73,6 +82,11 @@ static inline int pud_present(pud_t pud) return pud_val(pud) & _PAGE_PRESENT; } +static inline int pud_huge_page(pud_t pud) +{ + return pud_val(pud) & _PAGE_HUGE_PAGE; +} + #define pmd_ERROR(e) \ pr_err("%s:%d: bad pmd 0x%016llx.\n", __FILE__, __LINE__, pmd_val(e)) @@ -89,6 +103,9 @@ static inline int pud_bad(pud_t pud) /* Return the page-table frame number (ptfn) that a pud_t points at. */ #define pud_ptfn(pud) hv_pte_get_ptfn((pud).pgd) +/* Return the page frame number (pfn) that a pud_t points at. */ +#define pud_pfn(pud) pte_pfn(pud_pte(pud)) + /* * A given kernel pud_t maps to a kernel pmd_t table at a specific * virtual address. Since kernel pmd_t tables can be aligned at @@ -123,8 +140,7 @@ static inline unsigned long pgd_addr_normalize(unsigned long addr) /* We don't define any pgds for these addresses. */ static inline int pgd_addr_invalid(unsigned long addr) { - return addr >= MEM_HV_START || - (addr > MEM_LOW_END && addr < MEM_HIGH_START); + return addr >= KERNEL_HIGH_VADDR || addr != pgd_addr_normalize(addr); } /* @@ -152,13 +168,6 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, return hv_pte(__insn_exch(&ptep->val, 0UL)); } -/* - * pmds are the same as pgds and ptes, so converting is a no-op. - */ -#define pmd_pte(pmd) (pmd) -#define pmdp_ptep(pmdp) (pmdp) -#define pte_pmd(pte) (pte) - #endif /* __ASSEMBLY__ */ #endif /* _ASM_TILE_PGTABLE_64_H */ diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h index b3f1049..4232363 100644 --- a/arch/tile/include/asm/processor.h +++ b/arch/tile/include/asm/processor.h @@ -15,6 +15,8 @@ #ifndef _ASM_TILE_PROCESSOR_H #define _ASM_TILE_PROCESSOR_H +#include <arch/chip.h> + #ifndef __ASSEMBLY__ /* @@ -25,7 +27,6 @@ #include <asm/ptrace.h> #include <asm/percpu.h> -#include <arch/chip.h> #include <arch/spr_def.h> struct task_struct; @@ -110,18 +111,16 @@ struct thread_struct { unsigned long long interrupt_mask; /* User interrupt-control 0 state */ unsigned long intctrl_0; -#if CHIP_HAS_PROC_STATUS_SPR() + /* Is this task currently doing a backtrace? */ + bool in_backtrace; /* Any other miscellaneous processor state bits */ unsigned long proc_status; -#endif #if !CHIP_HAS_FIXED_INTVEC_BASE() /* Interrupt base for PL0 interrupts */ unsigned long interrupt_vector_base; #endif -#if CHIP_HAS_TILE_RTF_HWM() /* Tile cache retry fifo high-water mark */ unsigned long tile_rtf_hwm; -#endif #if CHIP_HAS_DSTREAM_PF() /* Data stream prefetch control */ unsigned long dstream_pf; @@ -134,21 +133,16 @@ struct thread_struct { /* Async DMA TLB fault information */ struct async_tlb dma_async_tlb; #endif -#if CHIP_HAS_SN_PROC() - /* Was static network processor when we were switched out? */ - int sn_proc_running; - /* Async SNI TLB fault information */ - struct async_tlb sn_async_tlb; -#endif }; #endif /* !__ASSEMBLY__ */ /* * Start with "sp" this many bytes below the top of the kernel stack. - * This preserves the invariant that a called function may write to *sp. + * This allows us to be cache-aware when handling the initial save + * of the pt_regs value to the stack. */ -#define STACK_TOP_DELTA 8 +#define STACK_TOP_DELTA 64 /* * When entering the kernel via a fault, start with the top of the @@ -164,7 +158,7 @@ struct thread_struct { #ifndef __ASSEMBLY__ #ifdef __tilegx__ -#define TASK_SIZE_MAX (MEM_LOW_END + 1) +#define TASK_SIZE_MAX (_AC(1, UL) << (MAX_VA_WIDTH - 1)) #else #define TASK_SIZE_MAX PAGE_OFFSET #endif @@ -178,10 +172,10 @@ struct thread_struct { #define TASK_SIZE TASK_SIZE_MAX #endif -/* We provide a minimal "vdso" a la x86; just the sigreturn code for now. */ -#define VDSO_BASE (TASK_SIZE - PAGE_SIZE) +#define VDSO_BASE ((unsigned long)current->active_mm->context.vdso_base) +#define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x)) -#define STACK_TOP VDSO_BASE +#define STACK_TOP TASK_SIZE /* STACK_TOP_MAX is used temporarily in execve and should not check COMPAT. */ #define STACK_TOP_MAX TASK_SIZE_MAX @@ -232,21 +226,28 @@ extern int do_work_pending(struct pt_regs *regs, u32 flags); unsigned long get_wchan(struct task_struct *p); /* Return initial ksp value for given task. */ -#define task_ksp0(task) ((unsigned long)(task)->stack + THREAD_SIZE) +#define task_ksp0(task) \ + ((unsigned long)(task)->stack + THREAD_SIZE - STACK_TOP_DELTA) /* Return some info about the user process TASK. */ -#define KSTK_TOP(task) (task_ksp0(task) - STACK_TOP_DELTA) #define task_pt_regs(task) \ - ((struct pt_regs *)(task_ksp0(task) - KSTK_PTREGS_GAP) - 1) + ((struct pt_regs *)(task_ksp0(task) - KSTK_PTREGS_GAP) - 1) #define current_pt_regs() \ - ((struct pt_regs *)((stack_pointer | (THREAD_SIZE - 1)) - \ - (KSTK_PTREGS_GAP - 1)) - 1) + ((struct pt_regs *)((stack_pointer | (THREAD_SIZE - 1)) - \ + STACK_TOP_DELTA - (KSTK_PTREGS_GAP - 1)) - 1) #define task_sp(task) (task_pt_regs(task)->sp) #define task_pc(task) (task_pt_regs(task)->pc) /* Aliases for pc and sp (used in fs/proc/array.c) */ #define KSTK_EIP(task) task_pc(task) #define KSTK_ESP(task) task_sp(task) +/* Fine-grained unaligned JIT support */ +#define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr)) +#define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val)) + +extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr); +extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val); + /* Standard format for printing registers and other word-size data. */ #ifdef __tilegx__ # define REGFMT "0x%016lx" @@ -275,7 +276,6 @@ extern char chip_model[64]; /* Data on which physical memory controller corresponds to which NUMA node. */ extern int node_controller[]; -#if CHIP_HAS_CBOX_HOME_MAP() /* Does the heap allocator return hash-for-home pages by default? */ extern int hash_default; @@ -285,11 +285,6 @@ extern int kstack_hash; /* Does MAP_ANONYMOUS return hash-for-home pages by default? */ #define uheap_hash hash_default -#else -#define hash_default 0 -#define kstack_hash 0 -#define uheap_hash 0 -#endif /* Are we using huge pages in the TLB for kernel data? */ extern int kdata_huge; @@ -337,7 +332,6 @@ extern int kdata_huge; /* * Provide symbolic constants for PLs. - * Note that assembly code assumes that USER_PL is zero. */ #define USER_PL 0 #if CONFIG_KERNEL_PL == 2 @@ -346,20 +340,38 @@ extern int kdata_huge; #define KERNEL_PL CONFIG_KERNEL_PL /* SYSTEM_SAVE_K_0 holds the current cpu number ORed with ksp0. */ -#define CPU_LOG_MASK_VALUE 12 -#define CPU_MASK_VALUE ((1 << CPU_LOG_MASK_VALUE) - 1) -#if CONFIG_NR_CPUS > CPU_MASK_VALUE -# error Too many cpus! +#ifdef __tilegx__ +#define CPU_SHIFT 48 +#if CHIP_VA_WIDTH() > CPU_SHIFT +# error Too many VA bits! #endif +#define MAX_CPU_ID ((1 << (64 - CPU_SHIFT)) - 1) +#define raw_smp_processor_id() \ + ((int)(__insn_mfspr(SPR_SYSTEM_SAVE_K_0) >> CPU_SHIFT)) +#define get_current_ksp0() \ + ((unsigned long)(((long)__insn_mfspr(SPR_SYSTEM_SAVE_K_0) << \ + (64 - CPU_SHIFT)) >> (64 - CPU_SHIFT))) +#define next_current_ksp0(task) ({ \ + unsigned long __ksp0 = task_ksp0(task) & ((1UL << CPU_SHIFT) - 1); \ + unsigned long __cpu = (long)raw_smp_processor_id() << CPU_SHIFT; \ + __ksp0 | __cpu; \ +}) +#else +#define LOG2_NR_CPU_IDS 6 +#define MAX_CPU_ID ((1 << LOG2_NR_CPU_IDS) - 1) #define raw_smp_processor_id() \ - ((int)__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & CPU_MASK_VALUE) + ((int)__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & MAX_CPU_ID) #define get_current_ksp0() \ - (__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & ~CPU_MASK_VALUE) + (__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & ~MAX_CPU_ID) #define next_current_ksp0(task) ({ \ unsigned long __ksp0 = task_ksp0(task); \ int __cpu = raw_smp_processor_id(); \ - BUG_ON(__ksp0 & CPU_MASK_VALUE); \ + BUG_ON(__ksp0 & MAX_CPU_ID); \ __ksp0 | __cpu; \ }) +#endif +#if CONFIG_NR_CPUS > (MAX_CPU_ID + 1) +# error Too many cpus! +#endif #endif /* _ASM_TILE_PROCESSOR_H */ diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h index fd41226..b9620c0 100644 --- a/arch/tile/include/asm/ptrace.h +++ b/arch/tile/include/asm/ptrace.h @@ -33,12 +33,13 @@ typedef unsigned long pt_reg_t; #ifndef __ASSEMBLY__ +#define regs_return_value(regs) ((regs)->regs[0]) #define instruction_pointer(regs) ((regs)->pc) #define profile_pc(regs) instruction_pointer(regs) #define user_stack_pointer(regs) ((regs)->sp) /* Does the process account for user or for system time? */ -#define user_mode(regs) (EX1_PL((regs)->ex1) == USER_PL) +#define user_mode(regs) (EX1_PL((regs)->ex1) < KERNEL_PL) /* Fill in a struct pt_regs with the current kernel registers. */ struct pt_regs *get_pt_regs(struct pt_regs *); @@ -79,8 +80,7 @@ extern void single_step_execve(void); struct task_struct; -extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, - int error_code); +extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs); #ifdef __tilegx__ /* We need this since sigval_t has a user pointer in it, for GETSIGINFO etc. */ diff --git a/arch/tile/include/asm/sections.h b/arch/tile/include/asm/sections.h index 7d8a935..5d5d3b7 100644 --- a/arch/tile/include/asm/sections.h +++ b/arch/tile/include/asm/sections.h @@ -25,10 +25,16 @@ extern char _sinitdata[], _einitdata[]; /* Write-once data is writable only till the end of initialization. */ extern char __w1data_begin[], __w1data_end[]; +extern char vdso_start[], vdso_end[]; +#ifdef CONFIG_COMPAT +extern char vdso32_start[], vdso32_end[]; +#endif /* Not exactly sections, but PC comparison points in the code. */ extern char __rt_sigreturn[], __rt_sigreturn_end[]; -#ifndef __tilegx__ +#ifdef __tilegx__ +extern char __start_unalign_asm_code[], __end_unalign_asm_code[]; +#else extern char sys_cmpxchg[], __sys_cmpxchg_end[]; extern char __sys_cmpxchg_grab_lock[]; extern char __start_atomic_asm_code[], __end_atomic_asm_code[]; diff --git a/arch/tile/include/asm/setup.h b/arch/tile/include/asm/setup.h index d048888..e989090 100644 --- a/arch/tile/include/asm/setup.h +++ b/arch/tile/include/asm/setup.h @@ -24,9 +24,8 @@ */ #define MAXMEM_PFN PFN_DOWN(MAXMEM) +int tile_console_write(const char *buf, int count); void early_panic(const char *fmt, ...); -void warn_early_printk(void); -void __init disable_early_printk(void); /* Init-time routine to do tile-specific per-cpu setup. */ void setup_cpu(int boot); diff --git a/arch/tile/include/asm/smp.h b/arch/tile/include/asm/smp.h index 1aa759a..9a326b6 100644 --- a/arch/tile/include/asm/smp.h +++ b/arch/tile/include/asm/smp.h @@ -101,10 +101,8 @@ void print_disabled_cpus(void); extern struct cpumask cpu_lotar_map; #define cpu_is_valid_lotar(cpu) cpumask_test_cpu((cpu), &cpu_lotar_map) -#if CHIP_HAS_CBOX_HOME_MAP() /* Which processors are used for hash-for-home mapping */ extern struct cpumask hash_for_home_map; -#endif /* Which cpus can have their cache flushed by hv_flush_remote(). */ extern struct cpumask cpu_cacheable_map; diff --git a/arch/tile/include/asm/spinlock_64.h b/arch/tile/include/asm/spinlock_64.h index 5f8b6a0..9a12b9c 100644 --- a/arch/tile/include/asm/spinlock_64.h +++ b/arch/tile/include/asm/spinlock_64.h @@ -27,7 +27,7 @@ * Return the "current" portion of a ticket lock value, * i.e. the number that currently owns the lock. */ -static inline int arch_spin_current(u32 val) +static inline u32 arch_spin_current(u32 val) { return val >> __ARCH_SPIN_CURRENT_SHIFT; } @@ -36,7 +36,7 @@ static inline int arch_spin_current(u32 val) * Return the "next" portion of a ticket lock value, * i.e. the number that the next task to try to acquire the lock will get. */ -static inline int arch_spin_next(u32 val) +static inline u32 arch_spin_next(u32 val) { return val & __ARCH_SPIN_NEXT_MASK; } diff --git a/arch/tile/include/asm/string.h b/arch/tile/include/asm/string.h index 7535cf1..92b271b 100644 --- a/arch/tile/include/asm/string.h +++ b/arch/tile/include/asm/string.h @@ -21,8 +21,10 @@ #define __HAVE_ARCH_MEMMOVE #define __HAVE_ARCH_STRCHR #define __HAVE_ARCH_STRLEN +#define __HAVE_ARCH_STRNLEN extern __kernel_size_t strlen(const char *); +extern __kernel_size_t strnlen(const char *, __kernel_size_t); extern char *strchr(const char *s, int c); extern void *memchr(const void *s, int c, size_t n); extern void *memset(void *, int, __kernel_size_t); diff --git a/arch/tile/include/asm/thread_info.h b/arch/tile/include/asm/thread_info.h index d1733de..b8aa6df 100644 --- a/arch/tile/include/asm/thread_info.h +++ b/arch/tile/include/asm/thread_info.h @@ -39,6 +39,11 @@ struct thread_info { struct restart_block restart_block; struct single_step_state *step_state; /* single step state (if non-zero) */ + int align_ctl; /* controls unaligned access */ +#ifdef __tilegx__ + unsigned long unalign_jit_tmp[4]; /* temp r0..r3 storage */ + void __user *unalign_jit_base; /* unalign fixup JIT base */ +#endif }; /* @@ -56,6 +61,7 @@ struct thread_info { .fn = do_no_restart_syscall, \ }, \ .step_state = NULL, \ + .align_ctl = 0, \ } #define init_thread_info (init_thread_union.thread_info) diff --git a/arch/tile/include/asm/traps.h b/arch/tile/include/asm/traps.h index e28c3df4..4b99a1c 100644 --- a/arch/tile/include/asm/traps.h +++ b/arch/tile/include/asm/traps.h @@ -15,12 +15,13 @@ #ifndef _ASM_TILE_TRAPS_H #define _ASM_TILE_TRAPS_H +#ifndef __ASSEMBLY__ #include <arch/chip.h> /* mm/fault.c */ void do_page_fault(struct pt_regs *, int fault_num, unsigned long address, unsigned long write); -#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() +#if CHIP_HAS_TILE_DMA() void do_async_page_fault(struct pt_regs *); #endif @@ -69,6 +70,16 @@ void gx_singlestep_handle(struct pt_regs *, int fault_num); /* kernel/intvec_64.S */ void fill_ra_stack(void); + +/* Handle unalign data fixup. */ +extern void do_unaligned(struct pt_regs *regs, int vecnum); +#endif + +#endif /* __ASSEMBLY__ */ + +#ifdef __tilegx__ +/* 128 byte JIT per unalign fixup. */ +#define UNALIGN_JIT_SHIFT 7 #endif #endif /* _ASM_TILE_TRAPS_H */ diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h index e4d44bd..b6cde32 100644 --- a/arch/tile/include/asm/uaccess.h +++ b/arch/tile/include/asm/uaccess.h @@ -127,8 +127,10 @@ extern int fixup_exception(struct pt_regs *regs); #ifdef __LP64__ #define _ASM_PTR ".quad" +#define _ASM_ALIGN ".align 8" #else #define _ASM_PTR ".long" +#define _ASM_ALIGN ".align 4" #endif #define __get_user_asm(OP, x, ptr, ret) \ @@ -137,6 +139,7 @@ extern int fixup_exception(struct pt_regs *regs); "0: { movei %1, 0; movei %0, %3 }\n" \ "j 9f\n" \ ".section __ex_table,\"a\"\n" \ + _ASM_ALIGN "\n" \ _ASM_PTR " 1b, 0b\n" \ ".popsection\n" \ "9:" \ @@ -168,6 +171,7 @@ extern int fixup_exception(struct pt_regs *regs); "0: { movei %1, 0; movei %2, 0 }\n" \ "{ movei %0, %4; j 9f }\n" \ ".section __ex_table,\"a\"\n" \ + ".align 4\n" \ ".word 1b, 0b\n" \ ".word 2b, 0b\n" \ ".popsection\n" \ @@ -224,6 +228,7 @@ extern int __get_user_bad(void) ".pushsection .fixup,\"ax\"\n" \ "0: { movei %0, %3; j 9f }\n" \ ".section __ex_table,\"a\"\n" \ + _ASM_ALIGN "\n" \ _ASM_PTR " 1b, 0b\n" \ ".popsection\n" \ "9:" \ @@ -248,6 +253,7 @@ extern int __get_user_bad(void) ".pushsection .fixup,\"ax\"\n" \ "0: { movei %0, %4; j 9f }\n" \ ".section __ex_table,\"a\"\n" \ + ".align 4\n" \ ".word 1b, 0b\n" \ ".word 2b, 0b\n" \ ".popsection\n" \ @@ -567,37 +573,6 @@ static inline unsigned long __must_check flush_user( } /** - * inv_user: - Invalidate a block of memory in user space from cache. - * @mem: Destination address, in user space. - * @len: Number of bytes to invalidate. - * - * Returns number of bytes that could not be invalidated. - * On success, this will be zero. - * - * Note that on Tile64, the "inv" operation is in fact a - * "flush and invalidate", so cache write-backs will occur prior - * to the cache being marked invalid. - */ -extern unsigned long inv_user_asm(void __user *mem, unsigned long len); -static inline unsigned long __must_check __inv_user( - void __user *mem, unsigned long len) -{ - int retval; - - might_fault(); - retval = inv_user_asm(mem, len); - mb_incoherent(); - return retval; -} -static inline unsigned long __must_check inv_user( - void __user *mem, unsigned long len) -{ - if (access_ok(VERIFY_WRITE, mem, len)) - return __inv_user(mem, len); - return len; -} - -/** * finv_user: - Flush-inval a block of memory in user space from cache. * @mem: Destination address, in user space. * @len: Number of bytes to invalidate. diff --git a/arch/tile/include/asm/unaligned.h b/arch/tile/include/asm/unaligned.h index 37dfbe5..5a58a0d 100644 --- a/arch/tile/include/asm/unaligned.h +++ b/arch/tile/include/asm/unaligned.h @@ -15,11 +15,15 @@ #ifndef _ASM_TILE_UNALIGNED_H #define _ASM_TILE_UNALIGNED_H -#include <linux/unaligned/le_struct.h> -#include <linux/unaligned/be_byteshift.h> -#include <linux/unaligned/generic.h> -#define get_unaligned __get_unaligned_le -#define put_unaligned __put_unaligned_le +/* + * We could implement faster get_unaligned_[be/le]64 using the ldna + * instruction on tilegx; however, we need to either copy all of the + * other generic functions to here (which is pretty ugly) or else + * modify both the generic code and other arch code to allow arch + * specific unaligned data access functions. Given these functions + * are not often called, we'll stick with the generic version. + */ +#include <asm-generic/unaligned.h> /* * Is the kernel doing fixups of unaligned accesses? If <0, no kernel diff --git a/arch/tile/include/asm/vdso.h b/arch/tile/include/asm/vdso.h new file mode 100644 index 0000000..9f6a78d --- /dev/null +++ b/arch/tile/include/asm/vdso.h @@ -0,0 +1,49 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef __TILE_VDSO_H__ +#define __TILE_VDSO_H__ + +#include <linux/types.h> + +/* + * Note about the vdso_data structure: + * + * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the + * structure is supposed to be known only to the function in the vdso + * itself and may change without notice. + */ + +struct vdso_data { + __u64 tz_update_count; /* Timezone atomicity ctr */ + __u64 tb_update_count; /* Timebase atomicity ctr */ + __u64 xtime_tod_stamp; /* TOD clock for xtime */ + __u64 xtime_clock_sec; /* Kernel time second */ + __u64 xtime_clock_nsec; /* Kernel time nanosecond */ + __u64 wtom_clock_sec; /* Wall to monotonic clock second */ + __u64 wtom_clock_nsec; /* Wall to monotonic clock nanosecond */ + __u32 mult; /* Cycle to nanosecond multiplier */ + __u32 shift; /* Cycle to nanosecond divisor (power of two) */ + __u32 tz_minuteswest; /* Minutes west of Greenwich */ + __u32 tz_dsttime; /* Type of dst correction */ +}; + +extern struct vdso_data *vdso_data; + +/* __vdso_rt_sigreturn is defined with the addresses in the vdso page. */ +extern void __vdso_rt_sigreturn(void); + +extern int setup_vdso_pages(void); + +#endif /* __TILE_VDSO_H__ */ diff --git a/arch/tile/include/gxio/iorpc_trio.h b/arch/tile/include/gxio/iorpc_trio.h index 58105c3..d95b96f 100644 --- a/arch/tile/include/gxio/iorpc_trio.h +++ b/arch/tile/include/gxio/iorpc_trio.h @@ -30,6 +30,7 @@ #define GXIO_TRIO_OP_ALLOC_MEMORY_MAPS IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1404) +#define GXIO_TRIO_OP_ALLOC_SCATTER_QUEUES IORPC_OPCODE(IORPC_FORMAT_NONE, 0x140e) #define GXIO_TRIO_OP_ALLOC_PIO_REGIONS IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1412) #define GXIO_TRIO_OP_INIT_PIO_REGION_AUX IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1414) @@ -54,6 +55,10 @@ int gxio_trio_alloc_memory_maps(gxio_trio_context_t * context, unsigned int flags); +int gxio_trio_alloc_scatter_queues(gxio_trio_context_t * context, + unsigned int count, unsigned int first, + unsigned int flags); + int gxio_trio_alloc_pio_regions(gxio_trio_context_t * context, unsigned int count, unsigned int first, unsigned int flags); diff --git a/arch/tile/include/gxio/iorpc_uart.h b/arch/tile/include/gxio/iorpc_uart.h new file mode 100644 index 0000000..55429d4 --- /dev/null +++ b/arch/tile/include/gxio/iorpc_uart.h @@ -0,0 +1,40 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* This file is machine-generated; DO NOT EDIT! */ +#ifndef __GXIO_UART_LINUX_RPC_H__ +#define __GXIO_UART_LINUX_RPC_H__ + +#include <hv/iorpc.h> + +#include <hv/drv_uart_intf.h> +#include <gxio/uart.h> +#include <gxio/kiorpc.h> +#include <linux/string.h> +#include <linux/module.h> +#include <asm/pgtable.h> + +#define GXIO_UART_OP_CFG_INTERRUPT IORPC_OPCODE(IORPC_FORMAT_KERNEL_INTERRUPT, 0x1900) +#define GXIO_UART_OP_GET_MMIO_BASE IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x8000) +#define GXIO_UART_OP_CHECK_MMIO_OFFSET IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x8001) + +int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, int inter_x, + int inter_y, int inter_ipi, int inter_event); + +int gxio_uart_get_mmio_base(gxio_uart_context_t *context, HV_PTE *base); + +int gxio_uart_check_mmio_offset(gxio_uart_context_t *context, + unsigned long offset, unsigned long size); + +#endif /* !__GXIO_UART_LINUX_RPC_H__ */ diff --git a/arch/tile/include/gxio/uart.h b/arch/tile/include/gxio/uart.h new file mode 100644 index 0000000..438ee7e --- /dev/null +++ b/arch/tile/include/gxio/uart.h @@ -0,0 +1,105 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _GXIO_UART_H_ +#define _GXIO_UART_H_ + +#include "common.h" + +#include <hv/drv_uart_intf.h> +#include <hv/iorpc.h> + +/* + * + * An API for manipulating UART interface. + */ + +/* + * + * The Rshim allows access to the processor's UART interface. + */ + +/* A context object used to manage UART resources. */ +typedef struct { + + /* File descriptor for calling up to the hypervisor. */ + int fd; + + /* The VA at which our MMIO registers are mapped. */ + char *mmio_base; + +} gxio_uart_context_t; + +/* Request UART interrupts. + * + * Request that interrupts be delivered to a tile when the UART's + * Receive FIFO is written, or the Write FIFO is read. + * + * @param context Pointer to a properly initialized gxio_uart_context_t. + * @param bind_cpu_x X coordinate of CPU to which interrupt will be delivered. + * @param bind_cpu_y Y coordinate of CPU to which interrupt will be delivered. + * @param bind_interrupt IPI interrupt number. + * @param bind_event Sub-interrupt event bit number; a negative value can + * disable the interrupt. + * @return Zero if all of the requested UART events were successfully + * configured to interrupt. + */ +extern int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, + int bind_cpu_x, + int bind_cpu_y, + int bind_interrupt, int bind_event); + +/* Initialize a UART context. + * + * A properly initialized context must be obtained before any of the other + * gxio_uart routines may be used. + * + * @param context Pointer to a gxio_uart_context_t, which will be initialized + * by this routine, if it succeeds. + * @param uart_index Index of the UART to use. + * @return Zero if the context was successfully initialized, else a + * GXIO_ERR_xxx error code. + */ +extern int gxio_uart_init(gxio_uart_context_t *context, int uart_index); + +/* Destroy a UART context. + * + * Once destroyed, a context may not be used with any gxio_uart routines + * other than gxio_uart_init(). After this routine returns, no further + * interrupts requested on this context will be delivered. The state and + * configuration of the pins which had been attached to this context are + * unchanged by this operation. + * + * @param context Pointer to a gxio_uart_context_t. + * @return Zero if the context was successfully destroyed, else a + * GXIO_ERR_xxx error code. + */ +extern int gxio_uart_destroy(gxio_uart_context_t *context); + +/* Write UART register. + * @param context Pointer to a gxio_uart_context_t. + * @param offset UART register offset. + * @param word Data will be wrote to UART reigister. + */ +extern void gxio_uart_write(gxio_uart_context_t *context, uint64_t offset, + uint64_t word); + +/* Read UART register. + * @param context Pointer to a gxio_uart_context_t. + * @param offset UART register offset. + * @return Data read from UART register. + */ +extern uint64_t gxio_uart_read(gxio_uart_context_t *context, uint64_t offset); + +#endif /* _GXIO_UART_H_ */ diff --git a/arch/tile/include/hv/drv_trio_intf.h b/arch/tile/include/hv/drv_trio_intf.h index ef9f3f5..237e04d 100644 --- a/arch/tile/include/hv/drv_trio_intf.h +++ b/arch/tile/include/hv/drv_trio_intf.h @@ -64,8 +64,9 @@ struct pcie_port_property * will not consider it an error if the link comes up as a x8 link. */ uint8_t allow_x8: 1; - /** Reserved. */ - uint8_t reserved: 1; + /** If true, this link is connected to a device which may or may not + * be present. */ + uint8_t removable: 1; }; @@ -167,6 +168,9 @@ pcie_stream_intr_config_sel_t; struct pcie_trio_ports_property { struct pcie_port_property ports[TILEGX_TRIO_PCIES]; + + /** Set if this TRIO belongs to a Gx72 device. */ + uint8_t is_gx72; }; /* Flags indicating traffic class. */ diff --git a/arch/tile/include/hv/drv_uart_intf.h b/arch/tile/include/hv/drv_uart_intf.h new file mode 100644 index 0000000..f5379e2 --- /dev/null +++ b/arch/tile/include/hv/drv_uart_intf.h @@ -0,0 +1,33 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/** + * Interface definitions for the UART driver. + */ + +#ifndef _SYS_HV_DRV_UART_INTF_H +#define _SYS_HV_DRV_UART_INTF_H + +#include <arch/uart.h> + +/** Number of UART ports supported. */ +#define TILEGX_UART_NR 2 + +/** The mmap file offset (PA) of the UART MMIO region. */ +#define HV_UART_MMIO_OFFSET 0 + +/** The maximum size of the UARTs MMIO region (64K Bytes). */ +#define HV_UART_MMIO_SIZE (1UL << 16) + +#endif /* _SYS_HV_DRV_UART_INTF_H */ diff --git a/arch/tile/include/hv/hypervisor.h b/arch/tile/include/hv/hypervisor.h index 837dca5..dfcdeb6 100644 --- a/arch/tile/include/hv/hypervisor.h +++ b/arch/tile/include/hv/hypervisor.h @@ -318,8 +318,11 @@ /** hv_set_pte_super_shift */ #define HV_DISPATCH_SET_PTE_SUPER_SHIFT 57 +/** hv_console_set_ipi */ +#define HV_DISPATCH_CONSOLE_SET_IPI 63 + /** One more than the largest dispatch value */ -#define _HV_DISPATCH_END 58 +#define _HV_DISPATCH_END 64 #ifndef __ASSEMBLER__ @@ -541,14 +544,24 @@ typedef enum { HV_CONFSTR_CPUMOD_REV = 18, /** Human-readable CPU module description. */ - HV_CONFSTR_CPUMOD_DESC = 19 + HV_CONFSTR_CPUMOD_DESC = 19, + + /** Per-tile hypervisor statistics. When this identifier is specified, + * the hv_confstr call takes two extra arguments. The first is the + * HV_XY_TO_LOTAR of the target tile's coordinates. The second is + * a flag word. The only current flag is the lowest bit, which means + * "zero out the stats instead of retrieving them"; in this case the + * buffer and buffer length are ignored. */ + HV_CONFSTR_HV_STATS = 20 } HV_ConfstrQuery; /** Query a configuration string from the hypervisor. * * @param query Identifier for the specific string to be retrieved - * (HV_CONFSTR_xxx). + * (HV_CONFSTR_xxx). Some strings may require or permit extra + * arguments to be appended which select specific objects to be + * described; see the string descriptions above. * @param buf Buffer in which to place the string. * @param len Length of the buffer. * @return If query is valid, then the length of the corresponding string, @@ -556,21 +569,16 @@ typedef enum { * was truncated. If query is invalid, HV_EINVAL. If the specified * buffer is not writable by the client, HV_EFAULT. */ -int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len); +int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len, ...); /** Tile coordinate */ typedef struct { -#ifndef __BIG_ENDIAN__ /** X coordinate, relative to supervisor's top-left coordinate */ int x; /** Y coordinate, relative to supervisor's top-left coordinate */ int y; -#else - int y; - int x; -#endif } HV_Coord; @@ -585,6 +593,30 @@ typedef struct */ int hv_get_ipi_pte(HV_Coord tile, int pl, HV_PTE* pte); +/** Configure the console interrupt. + * + * When the console client interrupt is enabled, the hypervisor will + * deliver the specified IPI to the client in the following situations: + * + * - The console has at least one character available for input. + * + * - The console can accept new characters for output, and the last call + * to hv_console_write() did not write all of the characters requested + * by the client. + * + * Note that in some system configurations, console interrupt will not + * be available; clients should be prepared for this routine to fail and + * to fall back to periodic console polling in that case. + * + * @param ipi Index of the IPI register which will receive the interrupt. + * @param event IPI event number for console interrupt. If less than 0, + * disable the console IPI interrupt. + * @param coord Tile to be targeted for console interrupt. + * @return 0 on success, otherwise, HV_EINVAL if illegal parameter, + * HV_ENOTSUP if console interrupt are not available. + */ +int hv_console_set_ipi(int ipi, int event, HV_Coord coord); + #else /* !CHIP_HAS_IPI() */ /** A set of interrupts. */ @@ -1092,13 +1124,8 @@ HV_VirtAddrRange hv_inquire_virtual(int idx); /** A range of ASID values. */ typedef struct { -#ifndef __BIG_ENDIAN__ HV_ASID start; /**< First ASID in the range. */ unsigned int size; /**< Number of ASIDs. Zero for an invalid range. */ -#else - unsigned int size; /**< Number of ASIDs. Zero for an invalid range. */ - HV_ASID start; /**< First ASID in the range. */ -#endif } HV_ASIDRange; /** Returns information about a range of ASIDs. @@ -1422,7 +1449,6 @@ typedef enum /** Message recipient. */ typedef struct { -#ifndef __BIG_ENDIAN__ /** X coordinate, relative to supervisor's top-left coordinate */ unsigned int x:11; @@ -1431,11 +1457,6 @@ typedef struct /** Status of this recipient */ HV_Recip_State state:10; -#else //__BIG_ENDIAN__ - HV_Recip_State state:10; - unsigned int y:11; - unsigned int x:11; -#endif } HV_Recipient; /** Send a message to a set of recipients. diff --git a/arch/tile/include/uapi/arch/Kbuild b/arch/tile/include/uapi/arch/Kbuild index 4ebc34f..97dfbec 100644 --- a/arch/tile/include/uapi/arch/Kbuild +++ b/arch/tile/include/uapi/arch/Kbuild @@ -1,7 +1,6 @@ # UAPI Header export list header-y += abi.h header-y += chip.h -header-y += chip_tile64.h header-y += chip_tilegx.h header-y += chip_tilepro.h header-y += icache.h diff --git a/arch/tile/include/uapi/arch/chip.h b/arch/tile/include/uapi/arch/chip.h index 926d3db..4c91f90 100644 --- a/arch/tile/include/uapi/arch/chip.h +++ b/arch/tile/include/uapi/arch/chip.h @@ -12,9 +12,7 @@ * more details. */ -#if __tile_chip__ == 0 -#include <arch/chip_tile64.h> -#elif __tile_chip__ == 1 +#if __tile_chip__ == 1 #include <arch/chip_tilepro.h> #elif defined(__tilegx__) #include <arch/chip_tilegx.h> diff --git a/arch/tile/include/uapi/arch/chip_tile64.h b/arch/tile/include/uapi/arch/chip_tile64.h deleted file mode 100644 index 261aaba..0000000 --- a/arch/tile/include/uapi/arch/chip_tile64.h +++ /dev/null @@ -1,258 +0,0 @@ -/* - * Copyright 2010 Tilera Corporation. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -/* - * @file - * Global header file. - * This header file specifies defines for TILE64. - */ - -#ifndef __ARCH_CHIP_H__ -#define __ARCH_CHIP_H__ - -/** Specify chip version. - * When possible, prefer the CHIP_xxx symbols below for future-proofing. - * This is intended for cross-compiling; native compilation should - * use the predefined __tile_chip__ symbol. - */ -#define TILE_CHIP 0 - -/** Specify chip revision. - * This provides for the case of a respin of a particular chip type; - * the normal value for this symbol is "0". - * This is intended for cross-compiling; native compilation should - * use the predefined __tile_chip_rev__ symbol. - */ -#define TILE_CHIP_REV 0 - -/** The name of this architecture. */ -#define CHIP_ARCH_NAME "tile64" - -/** The ELF e_machine type for binaries for this chip. */ -#define CHIP_ELF_TYPE() EM_TILE64 - -/** The alternate ELF e_machine type for binaries for this chip. */ -#define CHIP_COMPAT_ELF_TYPE() 0x2506 - -/** What is the native word size of the machine? */ -#define CHIP_WORD_SIZE() 32 - -/** How many bits of a virtual address are used. Extra bits must be - * the sign extension of the low bits. - */ -#define CHIP_VA_WIDTH() 32 - -/** How many bits are in a physical address? */ -#define CHIP_PA_WIDTH() 36 - -/** Size of the L2 cache, in bytes. */ -#define CHIP_L2_CACHE_SIZE() 65536 - -/** Log size of an L2 cache line in bytes. */ -#define CHIP_L2_LOG_LINE_SIZE() 6 - -/** Size of an L2 cache line, in bytes. */ -#define CHIP_L2_LINE_SIZE() (1 << CHIP_L2_LOG_LINE_SIZE()) - -/** Associativity of the L2 cache. */ -#define CHIP_L2_ASSOC() 2 - -/** Size of the L1 data cache, in bytes. */ -#define CHIP_L1D_CACHE_SIZE() 8192 - -/** Log size of an L1 data cache line in bytes. */ -#define CHIP_L1D_LOG_LINE_SIZE() 4 - -/** Size of an L1 data cache line, in bytes. */ -#define CHIP_L1D_LINE_SIZE() (1 << CHIP_L1D_LOG_LINE_SIZE()) - -/** Associativity of the L1 data cache. */ -#define CHIP_L1D_ASSOC() 2 - -/** Size of the L1 instruction cache, in bytes. */ -#define CHIP_L1I_CACHE_SIZE() 8192 - -/** Log size of an L1 instruction cache line in bytes. */ -#define CHIP_L1I_LOG_LINE_SIZE() 6 - -/** Size of an L1 instruction cache line, in bytes. */ -#define CHIP_L1I_LINE_SIZE() (1 << CHIP_L1I_LOG_LINE_SIZE()) - -/** Associativity of the L1 instruction cache. */ -#define CHIP_L1I_ASSOC() 1 - -/** Stride with which flush instructions must be issued. */ -#define CHIP_FLUSH_STRIDE() CHIP_L2_LINE_SIZE() - -/** Stride with which inv instructions must be issued. */ -#define CHIP_INV_STRIDE() CHIP_L1D_LINE_SIZE() - -/** Stride with which finv instructions must be issued. */ -#define CHIP_FINV_STRIDE() CHIP_L1D_LINE_SIZE() - -/** Can the local cache coherently cache data that is homed elsewhere? */ -#define CHIP_HAS_COHERENT_LOCAL_CACHE() 0 - -/** How many simultaneous outstanding victims can the L2 cache have? */ -#define CHIP_MAX_OUTSTANDING_VICTIMS() 2 - -/** Does the TLB support the NC and NOALLOC bits? */ -#define CHIP_HAS_NC_AND_NOALLOC_BITS() 0 - -/** Does the chip support hash-for-home caching? */ -#define CHIP_HAS_CBOX_HOME_MAP() 0 - -/** Number of entries in the chip's home map tables. */ -/* #define CHIP_CBOX_HOME_MAP_SIZE() -- does not apply to chip 0 */ - -/** Do uncacheable requests miss in the cache regardless of whether - * there is matching data? */ -#define CHIP_HAS_ENFORCED_UNCACHEABLE_REQUESTS() 0 - -/** Does the mf instruction wait for victims? */ -#define CHIP_HAS_MF_WAITS_FOR_VICTIMS() 1 - -/** Does the chip have an "inv" instruction that doesn't also flush? */ -#define CHIP_HAS_INV() 0 - -/** Does the chip have a "wh64" instruction? */ -#define CHIP_HAS_WH64() 0 - -/** Does this chip have a 'dword_align' instruction? */ -#define CHIP_HAS_DWORD_ALIGN() 0 - -/** Number of performance counters. */ -#define CHIP_PERFORMANCE_COUNTERS() 2 - -/** Does this chip have auxiliary performance counters? */ -#define CHIP_HAS_AUX_PERF_COUNTERS() 0 - -/** Is the CBOX_MSR1 SPR supported? */ -#define CHIP_HAS_CBOX_MSR1() 0 - -/** Is the TILE_RTF_HWM SPR supported? */ -#define CHIP_HAS_TILE_RTF_HWM() 0 - -/** Is the TILE_WRITE_PENDING SPR supported? */ -#define CHIP_HAS_TILE_WRITE_PENDING() 0 - -/** Is the PROC_STATUS SPR supported? */ -#define CHIP_HAS_PROC_STATUS_SPR() 0 - -/** Is the DSTREAM_PF SPR supported? */ -#define CHIP_HAS_DSTREAM_PF() 0 - -/** Log of the number of mshims we have. */ -#define CHIP_LOG_NUM_MSHIMS() 2 - -/** Are the bases of the interrupt vector areas fixed? */ -#define CHIP_HAS_FIXED_INTVEC_BASE() 1 - -/** Are the interrupt masks split up into 2 SPRs? */ -#define CHIP_HAS_SPLIT_INTR_MASK() 1 - -/** Is the cycle count split up into 2 SPRs? */ -#define CHIP_HAS_SPLIT_CYCLE() 1 - -/** Does the chip have a static network? */ -#define CHIP_HAS_SN() 1 - -/** Does the chip have a static network processor? */ -#define CHIP_HAS_SN_PROC() 1 - -/** Size of the L1 static network processor instruction cache, in bytes. */ -#define CHIP_L1SNI_CACHE_SIZE() 2048 - -/** Does the chip have DMA support in each tile? */ -#define CHIP_HAS_TILE_DMA() 1 - -/** Does the chip have the second revision of the directly accessible - * dynamic networks? This encapsulates a number of characteristics, - * including the absence of the catch-all, the absence of inline message - * tags, the absence of support for network context-switching, and so on. - */ -#define CHIP_HAS_REV1_XDN() 0 - -/** Does the chip have cmpexch and similar (fetchadd, exch, etc.)? */ -#define CHIP_HAS_CMPEXCH() 0 - -/** Does the chip have memory-mapped I/O support? */ -#define CHIP_HAS_MMIO() 0 - -/** Does the chip have post-completion interrupts? */ -#define CHIP_HAS_POST_COMPLETION_INTERRUPTS() 0 - -/** Does the chip have native single step support? */ -#define CHIP_HAS_SINGLE_STEP() 0 - -#ifndef __OPEN_SOURCE__ /* features only relevant to hypervisor-level code */ - -/** How many entries are present in the instruction TLB? */ -#define CHIP_ITLB_ENTRIES() 8 - -/** How many entries are present in the data TLB? */ -#define CHIP_DTLB_ENTRIES() 16 - -/** How many MAF entries does the XAUI shim have? */ -#define CHIP_XAUI_MAF_ENTRIES() 16 - -/** Does the memory shim have a source-id table? */ -#define CHIP_HAS_MSHIM_SRCID_TABLE() 1 - -/** Does the L1 instruction cache clear on reset? */ -#define CHIP_HAS_L1I_CLEAR_ON_RESET() 0 - -/** Does the chip come out of reset with valid coordinates on all tiles? - * Note that if defined, this also implies that the upper left is 1,1. - */ -#define CHIP_HAS_VALID_TILE_COORD_RESET() 0 - -/** Does the chip have unified packet formats? */ -#define CHIP_HAS_UNIFIED_PACKET_FORMATS() 0 - -/** Does the chip support write reordering? */ -#define CHIP_HAS_WRITE_REORDERING() 0 - -/** Does the chip support Y-X routing as well as X-Y? */ -#define CHIP_HAS_Y_X_ROUTING() 0 - -/** Is INTCTRL_3 managed with the correct MPL? */ -#define CHIP_HAS_INTCTRL_3_STATUS_FIX() 0 - -/** Is it possible to configure the chip to be big-endian? */ -#define CHIP_HAS_BIG_ENDIAN_CONFIG() 0 - -/** Is the CACHE_RED_WAY_OVERRIDDEN SPR supported? */ -#define CHIP_HAS_CACHE_RED_WAY_OVERRIDDEN() 0 - -/** Is the DIAG_TRACE_WAY SPR supported? */ -#define CHIP_HAS_DIAG_TRACE_WAY() 0 - -/** Is the MEM_STRIPE_CONFIG SPR supported? */ -#define CHIP_HAS_MEM_STRIPE_CONFIG() 0 - -/** Are the TLB_PERF SPRs supported? */ -#define CHIP_HAS_TLB_PERF() 0 - -/** Is the VDN_SNOOP_SHIM_CTL SPR supported? */ -#define CHIP_HAS_VDN_SNOOP_SHIM_CTL() 0 - -/** Does the chip support rev1 DMA packets? */ -#define CHIP_HAS_REV1_DMA_PACKETS() 0 - -/** Does the chip have an IPI shim? */ -#define CHIP_HAS_IPI() 0 - -#endif /* !__OPEN_SOURCE__ */ -#endif /* __ARCH_CHIP_H__ */ diff --git a/arch/tile/include/uapi/arch/opcode_tilegx.h b/arch/tile/include/uapi/arch/opcode_tilegx.h index c14d02c..d76ff2d 100644 --- a/arch/tile/include/uapi/arch/opcode_tilegx.h +++ b/arch/tile/include/uapi/arch/opcode_tilegx.h @@ -61,6 +61,7 @@ typedef tilegx_bundle_bits tile_bundle_bits; #define TILE_BUNDLE_ALIGNMENT_IN_BYTES TILEGX_BUNDLE_ALIGNMENT_IN_BYTES #define TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES \ TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES +#define TILE_BPT_BUNDLE TILEGX_BPT_BUNDLE /* 64-bit pattern for a { bpt ; nop } bundle. */ #define TILEGX_BPT_BUNDLE 0x286a44ae51485000ULL diff --git a/arch/tile/include/uapi/arch/opcode_tilepro.h b/arch/tile/include/uapi/arch/opcode_tilepro.h index 71b763b..4451cff 100644 --- a/arch/tile/include/uapi/arch/opcode_tilepro.h +++ b/arch/tile/include/uapi/arch/opcode_tilepro.h @@ -71,6 +71,7 @@ typedef tilepro_bundle_bits tile_bundle_bits; #define TILE_BUNDLE_ALIGNMENT_IN_BYTES TILEPRO_BUNDLE_ALIGNMENT_IN_BYTES #define TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES \ TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES +#define TILE_BPT_BUNDLE TILEPRO_BPT_BUNDLE /* 64-bit pattern for a { bpt ; nop } bundle. */ #define TILEPRO_BPT_BUNDLE 0x400b3cae70166000ULL diff --git a/arch/tile/include/uapi/arch/spr_def_32.h b/arch/tile/include/uapi/arch/spr_def_32.h index c689446..78daa31 100644 --- a/arch/tile/include/uapi/arch/spr_def_32.h +++ b/arch/tile/include/uapi/arch/spr_def_32.h @@ -200,8 +200,6 @@ #define SPR_SIM_CONTROL 0x4e0c #define SPR_SNCTL 0x0805 #define SPR_SNCTL__FRZFABRIC_MASK 0x1 -#define SPR_SNCTL__FRZPROC_MASK 0x2 -#define SPR_SNPC 0x080b #define SPR_SNSTATIC 0x080c #define SPR_SYSTEM_SAVE_0_0 0x4b00 #define SPR_SYSTEM_SAVE_0_1 0x4b01 diff --git a/arch/tile/include/uapi/asm/auxvec.h b/arch/tile/include/uapi/asm/auxvec.h index 1d393ed..c93e927 100644 --- a/arch/tile/include/uapi/asm/auxvec.h +++ b/arch/tile/include/uapi/asm/auxvec.h @@ -15,6 +15,7 @@ #ifndef _ASM_TILE_AUXVEC_H #define _ASM_TILE_AUXVEC_H -/* No extensions to auxvec */ +/* The vDSO location. */ +#define AT_SYSINFO_EHDR 33 #endif /* _ASM_TILE_AUXVEC_H */ diff --git a/arch/tile/include/uapi/asm/cachectl.h b/arch/tile/include/uapi/asm/cachectl.h index af4c9f9..572ddca 100644 --- a/arch/tile/include/uapi/asm/cachectl.h +++ b/arch/tile/include/uapi/asm/cachectl.h @@ -29,8 +29,8 @@ * to honor the arguments at some point.) * * Flush and invalidation of memory can normally be performed with the - * __insn_flush(), __insn_inv(), and __insn_finv() instructions from - * userspace. The DCACHE option to the system call allows userspace + * __insn_flush() and __insn_finv() instructions from userspace. + * The DCACHE option to the system call allows userspace * to flush the entire L1+L2 data cache from the core. In this case, * the address and length arguments are not used. The DCACHE flush is * restricted to the current core, not all cores in the address space. diff --git a/arch/tile/kernel/Makefile b/arch/tile/kernel/Makefile index 5334be8..27a2bf3 100644 --- a/arch/tile/kernel/Makefile +++ b/arch/tile/kernel/Makefile @@ -3,11 +3,17 @@ # extra-y := vmlinux.lds head_$(BITS).o -obj-y := backtrace.o entry.o irq.o messaging.o \ +obj-y := backtrace.o entry.o hvglue.o irq.o messaging.o \ pci-dma.o proc.o process.o ptrace.o reboot.o \ - setup.o signal.o single_step.o stack.o sys.o sysfs.o time.o traps.o \ + setup.o signal.o single_step.o stack.o sys.o \ + sysfs.o time.o traps.o unaligned.o vdso.o \ intvec_$(BITS).o regs_$(BITS).o tile-desc_$(BITS).o +ifdef CONFIG_FUNCTION_TRACER +CFLAGS_REMOVE_ftrace.o = -pg +CFLAGS_REMOVE_early_printk.o = -pg +endif + obj-$(CONFIG_HARDWALL) += hardwall.o obj-$(CONFIG_COMPAT) += compat.o compat_signal.o obj-$(CONFIG_SMP) += smpboot.o smp.o tlb.o @@ -20,3 +26,9 @@ else obj-$(CONFIG_PCI) += pci.o endif obj-$(CONFIG_TILE_USB) += usb.o +obj-$(CONFIG_TILE_HVGLUE_TRACE) += hvglue_trace.o +obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o mcount_64.o +obj-$(CONFIG_KPROBES) += kprobes.o +obj-$(CONFIG_KGDB) += kgdb.o + +obj-y += vdso/ diff --git a/arch/tile/kernel/asm-offsets.c b/arch/tile/kernel/asm-offsets.c index 01ddf19..375e7c3 100644 --- a/arch/tile/kernel/asm-offsets.c +++ b/arch/tile/kernel/asm-offsets.c @@ -14,13 +14,6 @@ * Generates definitions from c-type structures used by assembly sources. */ -#include <linux/kbuild.h> -#include <linux/thread_info.h> -#include <linux/sched.h> -#include <linux/hardirq.h> -#include <linux/ptrace.h> -#include <hv/hypervisor.h> - /* Check for compatible compiler early in the build. */ #ifdef CONFIG_TILEGX # ifndef __tilegx__ @@ -31,46 +24,61 @@ # endif #else # ifdef __tilegx__ -# error Can not build TILEPro/TILE64 configurations with tilegx compiler +# error Can not build TILEPro configurations with tilegx compiler # endif #endif +#include <linux/kbuild.h> +#include <linux/thread_info.h> +#include <linux/sched.h> +#include <linux/hardirq.h> +#include <linux/ptrace.h> +#include <hv/hypervisor.h> + void foo(void) { - DEFINE(SINGLESTEP_STATE_BUFFER_OFFSET, \ + DEFINE(SINGLESTEP_STATE_BUFFER_OFFSET, offsetof(struct single_step_state, buffer)); - DEFINE(SINGLESTEP_STATE_FLAGS_OFFSET, \ + DEFINE(SINGLESTEP_STATE_FLAGS_OFFSET, offsetof(struct single_step_state, flags)); - DEFINE(SINGLESTEP_STATE_ORIG_PC_OFFSET, \ + DEFINE(SINGLESTEP_STATE_ORIG_PC_OFFSET, offsetof(struct single_step_state, orig_pc)); - DEFINE(SINGLESTEP_STATE_NEXT_PC_OFFSET, \ + DEFINE(SINGLESTEP_STATE_NEXT_PC_OFFSET, offsetof(struct single_step_state, next_pc)); - DEFINE(SINGLESTEP_STATE_BRANCH_NEXT_PC_OFFSET, \ + DEFINE(SINGLESTEP_STATE_BRANCH_NEXT_PC_OFFSET, offsetof(struct single_step_state, branch_next_pc)); - DEFINE(SINGLESTEP_STATE_UPDATE_VALUE_OFFSET, \ + DEFINE(SINGLESTEP_STATE_UPDATE_VALUE_OFFSET, offsetof(struct single_step_state, update_value)); - DEFINE(THREAD_INFO_TASK_OFFSET, \ + DEFINE(THREAD_INFO_TASK_OFFSET, offsetof(struct thread_info, task)); - DEFINE(THREAD_INFO_FLAGS_OFFSET, \ + DEFINE(THREAD_INFO_FLAGS_OFFSET, offsetof(struct thread_info, flags)); - DEFINE(THREAD_INFO_STATUS_OFFSET, \ + DEFINE(THREAD_INFO_STATUS_OFFSET, offsetof(struct thread_info, status)); - DEFINE(THREAD_INFO_HOMECACHE_CPU_OFFSET, \ + DEFINE(THREAD_INFO_HOMECACHE_CPU_OFFSET, offsetof(struct thread_info, homecache_cpu)); - DEFINE(THREAD_INFO_STEP_STATE_OFFSET, \ + DEFINE(THREAD_INFO_PREEMPT_COUNT_OFFSET, + offsetof(struct thread_info, preempt_count)); + DEFINE(THREAD_INFO_STEP_STATE_OFFSET, offsetof(struct thread_info, step_state)); +#ifdef __tilegx__ + DEFINE(THREAD_INFO_UNALIGN_JIT_BASE_OFFSET, + offsetof(struct thread_info, unalign_jit_base)); + DEFINE(THREAD_INFO_UNALIGN_JIT_TMP_OFFSET, + offsetof(struct thread_info, unalign_jit_tmp)); +#endif DEFINE(TASK_STRUCT_THREAD_KSP_OFFSET, offsetof(struct task_struct, thread.ksp)); DEFINE(TASK_STRUCT_THREAD_PC_OFFSET, offsetof(struct task_struct, thread.pc)); - DEFINE(HV_TOPOLOGY_WIDTH_OFFSET, \ + DEFINE(HV_TOPOLOGY_WIDTH_OFFSET, offsetof(HV_Topology, width)); - DEFINE(HV_TOPOLOGY_HEIGHT_OFFSET, \ + DEFINE(HV_TOPOLOGY_HEIGHT_OFFSET, offsetof(HV_Topology, height)); - DEFINE(IRQ_CPUSTAT_SYSCALL_COUNT_OFFSET, \ + DEFINE(IRQ_CPUSTAT_SYSCALL_COUNT_OFFSET, offsetof(irq_cpustat_t, irq_syscall_count)); } diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index d0a052e..85e00b2 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -32,6 +32,7 @@ #include <asm/ucontext.h> #include <asm/sigframe.h> #include <asm/syscalls.h> +#include <asm/vdso.h> #include <arch/interrupts.h> struct compat_ucontext { @@ -227,7 +228,7 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, if (err) goto give_sigsegv; - restorer = VDSO_BASE; + restorer = VDSO_SYM(&__vdso_rt_sigreturn); if (ka->sa.sa_flags & SA_RESTORER) restorer = ptr_to_compat_reg(ka->sa.sa_restorer); diff --git a/arch/tile/kernel/early_printk.c b/arch/tile/kernel/early_printk.c index 34d72a1..b608e00 100644 --- a/arch/tile/kernel/early_printk.c +++ b/arch/tile/kernel/early_printk.c @@ -23,19 +23,24 @@ static void early_hv_write(struct console *con, const char *s, unsigned n) { - hv_console_write((HV_VirtAddr) s, n); + tile_console_write(s, n); + + /* + * Convert NL to NLCR (close enough to CRNL) during early boot. + * We assume newlines are at the ends of strings, which turns out + * to be good enough for early boot console output. + */ + if (n && s[n-1] == '\n') + tile_console_write("\r", 1); } static struct console early_hv_console = { .name = "earlyhv", .write = early_hv_write, - .flags = CON_PRINTBUFFER, + .flags = CON_PRINTBUFFER | CON_BOOT, .index = -1, }; -/* Direct interface for emergencies */ -static int early_console_complete; - void early_panic(const char *fmt, ...) { va_list ap; @@ -43,51 +48,21 @@ void early_panic(const char *fmt, ...) va_start(ap, fmt); early_printk("Kernel panic - not syncing: "); early_vprintk(fmt, ap); - early_console->write(early_console, "\n", 1); + early_printk("\n"); va_end(ap); dump_stack(); hv_halt(); } -static int __initdata keep_early; - static int __init setup_early_printk(char *str) { if (early_console) return 1; - if (str != NULL && strncmp(str, "keep", 4) == 0) - keep_early = 1; - early_console = &early_hv_console; register_console(early_console); return 0; } -void __init disable_early_printk(void) -{ - early_console_complete = 1; - if (!early_console) - return; - if (!keep_early) { - early_printk("disabling early console\n"); - unregister_console(early_console); - early_console = NULL; - } else { - early_printk("keeping early console\n"); - } -} - -void warn_early_printk(void) -{ - if (early_console_complete || early_console) - return; - early_printk("\ -Machine shutting down before console output is fully initialized.\n\ -You may wish to reboot and add the option 'earlyprintk' to your\n\ -boot command line to see any diagnostic early console output.\n\ -"); -} - early_param("earlyprintk", setup_early_printk); diff --git a/arch/tile/kernel/entry.S b/arch/tile/kernel/entry.S index f116cb0..3d91759 100644 --- a/arch/tile/kernel/entry.S +++ b/arch/tile/kernel/entry.S @@ -27,22 +27,6 @@ STD_ENTRY(current_text_addr) { move r0, lr; jrp lr } STD_ENDPROC(current_text_addr) -/* - * We don't run this function directly, but instead copy it to a page - * we map into every user process. See vdso_setup(). - * - * Note that libc has a copy of this function that it uses to compare - * against the PC when a stack backtrace ends, so if this code is - * changed, the libc implementation(s) should also be updated. - */ - .pushsection .data -ENTRY(__rt_sigreturn) - moveli TREG_SYSCALL_NR_NAME,__NR_rt_sigreturn - swint1 - ENDPROC(__rt_sigreturn) - ENTRY(__rt_sigreturn_end) - .popsection - STD_ENTRY(dump_stack) { move r2, lr; lnk r1 } { move r4, r52; addli r1, r1, dump_stack - . } diff --git a/arch/tile/kernel/ftrace.c b/arch/tile/kernel/ftrace.c new file mode 100644 index 0000000..f1c4520 --- /dev/null +++ b/arch/tile/kernel/ftrace.c @@ -0,0 +1,246 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * TILE-Gx specific ftrace support + */ + +#include <linux/ftrace.h> +#include <linux/uaccess.h> + +#include <asm/cacheflush.h> +#include <asm/ftrace.h> +#include <asm/sections.h> + +#include <arch/opcode.h> + +#ifdef CONFIG_DYNAMIC_FTRACE + +static inline tilegx_bundle_bits NOP(void) +{ + return create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) | + create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) | + create_Opcode_X0(RRR_0_OPCODE_X0) | + create_UnaryOpcodeExtension_X1(NOP_UNARY_OPCODE_X1) | + create_RRROpcodeExtension_X1(UNARY_RRR_0_OPCODE_X1) | + create_Opcode_X1(RRR_0_OPCODE_X1); +} + +static int machine_stopped __read_mostly; + +int ftrace_arch_code_modify_prepare(void) +{ + machine_stopped = 1; + return 0; +} + +int ftrace_arch_code_modify_post_process(void) +{ + flush_icache_range(0, CHIP_L1I_CACHE_SIZE()); + machine_stopped = 0; + return 0; +} + +/* + * Put { move r10, lr; jal ftrace_caller } in a bundle, this lets dynamic + * tracer just add one cycle overhead to every kernel function when disabled. + */ +static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr, + bool link) +{ + tilegx_bundle_bits opcode_x0, opcode_x1; + long pcrel_by_instr = (addr - pc) >> TILEGX_LOG2_BUNDLE_SIZE_IN_BYTES; + + if (link) { + /* opcode: jal addr */ + opcode_x1 = + create_Opcode_X1(JUMP_OPCODE_X1) | + create_JumpOpcodeExtension_X1(JAL_JUMP_OPCODE_X1) | + create_JumpOff_X1(pcrel_by_instr); + } else { + /* opcode: j addr */ + opcode_x1 = + create_Opcode_X1(JUMP_OPCODE_X1) | + create_JumpOpcodeExtension_X1(J_JUMP_OPCODE_X1) | + create_JumpOff_X1(pcrel_by_instr); + } + + if (addr == FTRACE_ADDR) { + /* opcode: or r10, lr, zero */ + opcode_x0 = + create_Dest_X0(10) | + create_SrcA_X0(TREG_LR) | + create_SrcB_X0(TREG_ZERO) | + create_RRROpcodeExtension_X0(OR_RRR_0_OPCODE_X0) | + create_Opcode_X0(RRR_0_OPCODE_X0); + } else { + /* opcode: fnop */ + opcode_x0 = + create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) | + create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) | + create_Opcode_X0(RRR_0_OPCODE_X0); + } + + return opcode_x1 | opcode_x0; +} + +static unsigned long ftrace_nop_replace(struct dyn_ftrace *rec) +{ + return NOP(); +} + +static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) +{ + return ftrace_gen_branch(pc, addr, true); +} + +static int ftrace_modify_code(unsigned long pc, unsigned long old, + unsigned long new) +{ + unsigned long pc_wr; + + /* Check if the address is in kernel text space and module space. */ + if (!kernel_text_address(pc)) + return -EINVAL; + + /* Operate on writable kernel text mapping. */ + pc_wr = pc - MEM_SV_START + PAGE_OFFSET; + + if (probe_kernel_write((void *)pc_wr, &new, MCOUNT_INSN_SIZE)) + return -EPERM; + + smp_wmb(); + + if (!machine_stopped && num_online_cpus() > 1) + flush_icache_range(pc, pc + MCOUNT_INSN_SIZE); + + return 0; +} + +int ftrace_update_ftrace_func(ftrace_func_t func) +{ + unsigned long pc, old; + unsigned long new; + int ret; + + pc = (unsigned long)&ftrace_call; + memcpy(&old, &ftrace_call, MCOUNT_INSN_SIZE); + new = ftrace_call_replace(pc, (unsigned long)func); + + ret = ftrace_modify_code(pc, old, new); + + return ret; +} + +int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) +{ + unsigned long new, old; + unsigned long ip = rec->ip; + + old = ftrace_nop_replace(rec); + new = ftrace_call_replace(ip, addr); + + return ftrace_modify_code(rec->ip, old, new); +} + +int ftrace_make_nop(struct module *mod, + struct dyn_ftrace *rec, unsigned long addr) +{ + unsigned long ip = rec->ip; + unsigned long old; + unsigned long new; + int ret; + + old = ftrace_call_replace(ip, addr); + new = ftrace_nop_replace(rec); + ret = ftrace_modify_code(ip, old, new); + + return ret; +} + +int __init ftrace_dyn_arch_init(void *data) +{ + *(unsigned long *)data = 0; + + return 0; +} +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, + unsigned long frame_pointer) +{ + unsigned long return_hooker = (unsigned long) &return_to_handler; + struct ftrace_graph_ent trace; + unsigned long old; + int err; + + if (unlikely(atomic_read(¤t->tracing_graph_pause))) + return; + + old = *parent; + *parent = return_hooker; + + err = ftrace_push_return_trace(old, self_addr, &trace.depth, + frame_pointer); + if (err == -EBUSY) { + *parent = old; + return; + } + + trace.func = self_addr; + + /* Only trace if the calling function expects to */ + if (!ftrace_graph_entry(&trace)) { + current->curr_ret_stack--; + *parent = old; + } +} + +#ifdef CONFIG_DYNAMIC_FTRACE +extern unsigned long ftrace_graph_call; + +static int __ftrace_modify_caller(unsigned long *callsite, + void (*func) (void), bool enable) +{ + unsigned long caller_fn = (unsigned long) func; + unsigned long pc = (unsigned long) callsite; + unsigned long branch = ftrace_gen_branch(pc, caller_fn, false); + unsigned long nop = NOP(); + unsigned long old = enable ? nop : branch; + unsigned long new = enable ? branch : nop; + + return ftrace_modify_code(pc, old, new); +} + +static int ftrace_modify_graph_caller(bool enable) +{ + int ret; + + ret = __ftrace_modify_caller(&ftrace_graph_call, + ftrace_graph_caller, + enable); + + return ret; +} + +int ftrace_enable_ftrace_graph_caller(void) +{ + return ftrace_modify_graph_caller(true); +} + +int ftrace_disable_ftrace_graph_caller(void) +{ + return ftrace_modify_graph_caller(false); +} +#endif /* CONFIG_DYNAMIC_FTRACE */ +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ diff --git a/arch/tile/kernel/hardwall.c b/arch/tile/kernel/hardwall.c index 38ac189..df27a1f 100644 --- a/arch/tile/kernel/hardwall.c +++ b/arch/tile/kernel/hardwall.c @@ -272,9 +272,9 @@ static void hardwall_setup_func(void *info) struct hardwall_info *r = info; struct hardwall_type *hwt = r->type; - int cpu = smp_processor_id(); - int x = cpu % smp_width; - int y = cpu / smp_width; + int cpu = smp_processor_id(); /* on_each_cpu disables preemption */ + int x = cpu_x(cpu); + int y = cpu_y(cpu); int bits = 0; if (x == r->ulhc_x) bits |= W_PROTECT; @@ -317,6 +317,7 @@ static void hardwall_protect_rectangle(struct hardwall_info *r) on_each_cpu_mask(&rect_cpus, hardwall_setup_func, r, 1); } +/* Entered from INT_xDN_FIREWALL interrupt vector with irqs disabled. */ void __kprobes do_hardwall_trap(struct pt_regs* regs, int fault_num) { struct hardwall_info *rect; @@ -325,7 +326,6 @@ void __kprobes do_hardwall_trap(struct pt_regs* regs, int fault_num) struct siginfo info; int cpu = smp_processor_id(); int found_processes; - unsigned long flags; struct pt_regs *old_regs = set_irq_regs(regs); irq_enter(); @@ -346,7 +346,7 @@ void __kprobes do_hardwall_trap(struct pt_regs* regs, int fault_num) BUG_ON(hwt->disabled); /* This tile trapped a network access; find the rectangle. */ - spin_lock_irqsave(&hwt->lock, flags); + spin_lock(&hwt->lock); list_for_each_entry(rect, &hwt->list, list) { if (cpumask_test_cpu(cpu, &rect->cpumask)) break; @@ -401,7 +401,7 @@ void __kprobes do_hardwall_trap(struct pt_regs* regs, int fault_num) pr_notice("hardwall: no associated processes!\n"); done: - spin_unlock_irqrestore(&hwt->lock, flags); + spin_unlock(&hwt->lock); /* * We have to disable firewall interrupts now, or else when we @@ -540,6 +540,14 @@ static struct hardwall_info *hardwall_create(struct hardwall_type *hwt, } } + /* + * Eliminate cpus that are not part of this Linux client. + * Note that this allows for configurations that we might not want to + * support, such as one client on every even cpu, another client on + * every odd cpu. + */ + cpumask_and(&info->cpumask, &info->cpumask, cpu_online_mask); + /* Confirm it doesn't overlap and add it to the list. */ spin_lock_irqsave(&hwt->lock, flags); list_for_each_entry(iter, &hwt->list, list) { @@ -612,7 +620,7 @@ static int hardwall_activate(struct hardwall_info *info) /* * Deactivate a task's hardwall. Must hold lock for hardwall_type. - * This method may be called from free_task(), so we don't want to + * This method may be called from exit_thread(), so we don't want to * rely on too many fields of struct task_struct still being valid. * We assume the cpus_allowed, pid, and comm fields are still valid. */ @@ -653,7 +661,7 @@ static int hardwall_deactivate(struct hardwall_type *hwt, return -EINVAL; printk(KERN_DEBUG "Pid %d (%s) deactivated for %s hardwall: cpu %d\n", - task->pid, task->comm, hwt->name, smp_processor_id()); + task->pid, task->comm, hwt->name, raw_smp_processor_id()); return 0; } @@ -795,8 +803,8 @@ static void reset_xdn_network_state(struct hardwall_type *hwt) /* Reset UDN coordinates to their standard value */ { unsigned int cpu = smp_processor_id(); - unsigned int x = cpu % smp_width; - unsigned int y = cpu / smp_width; + unsigned int x = cpu_x(cpu); + unsigned int y = cpu_y(cpu); __insn_mtspr(SPR_UDN_TILE_COORD, (x << 18) | (y << 7)); } diff --git a/arch/tile/kernel/head_32.S b/arch/tile/kernel/head_32.S index ac11530..8d5b40f 100644 --- a/arch/tile/kernel/head_32.S +++ b/arch/tile/kernel/head_32.S @@ -39,12 +39,12 @@ ENTRY(_start) } { moveli r0, _HV_VERSION_OLD_HV_INIT - jal hv_init + jal _hv_init } /* Get a reasonable default ASID in r0 */ { move r0, zero - jal hv_inquire_asid + jal _hv_inquire_asid } /* Install the default page table */ { @@ -64,7 +64,7 @@ ENTRY(_start) auli r0, r0, ha16(swapper_pg_dir - PAGE_OFFSET) } { - inv r6 + finv r6 move r1, zero /* high 32 bits of CPA is zero */ } { @@ -73,12 +73,12 @@ ENTRY(_start) } { auli lr, lr, ha16(1f) - j hv_install_context + j _hv_install_context } 1: /* Get our processor number and save it away in SAVE_K_0. */ - jal hv_inquire_topology + jal _hv_inquire_topology mulll_uu r4, r1, r2 /* r1 == y, r2 == width */ add r4, r4, r0 /* r0 == x, so r4 == cpu == y*width + x */ @@ -86,7 +86,7 @@ ENTRY(_start) /* * Load up our per-cpu offset. When the first (master) tile * boots, this value is still zero, so we will load boot_pc - * with start_kernel, and boot_sp with init_stack + THREAD_SIZE. + * with start_kernel, and boot_sp at the top of init_stack. * The master tile initializes the per-cpu offset array, so that * when subsequent (secondary) tiles boot, they will instead load * from their per-cpu versions of boot_sp and boot_pc. @@ -126,7 +126,6 @@ ENTRY(_start) lw sp, r1 or r4, sp, r4 mtspr SPR_SYSTEM_SAVE_K_0, r4 /* save ksp0 + cpu */ - addi sp, sp, -STACK_TOP_DELTA { move lr, zero /* stop backtraces in the called function */ jr r0 @@ -163,8 +162,8 @@ ENTRY(swapper_pg_dir) .set addr, addr + PGDIR_SIZE .endr - /* The true text VAs are mapped as VA = PA + MEM_SV_INTRPT */ - PTE MEM_SV_INTRPT, 0, (1 << (HV_PTE_INDEX_READABLE - 32)) | \ + /* The true text VAs are mapped as VA = PA + MEM_SV_START */ + PTE MEM_SV_START, 0, (1 << (HV_PTE_INDEX_READABLE - 32)) | \ (1 << (HV_PTE_INDEX_EXECUTABLE - 32)) .org swapper_pg_dir + PGDIR_SIZE END(swapper_pg_dir) diff --git a/arch/tile/kernel/head_64.S b/arch/tile/kernel/head_64.S index 6093964..bd0e12f 100644 --- a/arch/tile/kernel/head_64.S +++ b/arch/tile/kernel/head_64.S @@ -25,6 +25,15 @@ #include <arch/chip.h> #include <arch/spr_def.h> +/* Extract two 32-bit bit values that were read into one register. */ +#ifdef __BIG_ENDIAN__ +#define GET_FIRST_INT(rd, rs) shrsi rd, rs, 32 +#define GET_SECOND_INT(rd, rs) addxi rd, rs, 0 +#else +#define GET_FIRST_INT(rd, rs) addxi rd, rs, 0 +#define GET_SECOND_INT(rd, rs) shrsi rd, rs, 32 +#endif + /* * This module contains the entry code for kernel images. It performs the * minimal setup needed to call the generic C routines. @@ -46,11 +55,11 @@ ENTRY(_start) movei r2, TILE_CHIP_REV movei r3, KERNEL_PL } - jal hv_init + jal _hv_init /* Get a reasonable default ASID in r0 */ { move r0, zero - jal hv_inquire_asid + jal _hv_inquire_asid } /* @@ -61,7 +70,7 @@ ENTRY(_start) * other CPUs should see a properly-constructed page table. */ { - v4int_l r2, zero, r0 /* ASID for hv_install_context */ + GET_FIRST_INT(r2, r0) /* ASID for hv_install_context */ moveli r4, hw1_last(swapper_pgprot - PAGE_OFFSET) } { @@ -77,7 +86,7 @@ ENTRY(_start) { /* After initializing swapper_pgprot, HV_PTE_GLOBAL is set. */ bfextu r7, r1, HV_PTE_INDEX_GLOBAL, HV_PTE_INDEX_GLOBAL - inv r4 + finv r4 } bnez r7, .Lno_write { @@ -121,29 +130,24 @@ ENTRY(_start) } { moveli r3, CTX_PAGE_FLAG - j hv_install_context + j _hv_install_context } 1: /* Install the interrupt base. */ - moveli r0, hw2_last(MEM_SV_START) - shl16insli r0, r0, hw1(MEM_SV_START) - shl16insli r0, r0, hw0(MEM_SV_START) + moveli r0, hw2_last(intrpt_start) + shl16insli r0, r0, hw1(intrpt_start) + shl16insli r0, r0, hw0(intrpt_start) mtspr SPR_INTERRUPT_VECTOR_BASE_K, r0 - /* - * Get our processor number and save it away in SAVE_K_0. - * Extract stuff from the topology structure: r4 = y, r6 = x, - * r5 = width. FIXME: consider whether we want to just make these - * 64-bit values (and if so fix smp_topology write below, too). - */ - jal hv_inquire_topology + /* Get our processor number and save it away in SAVE_K_0. */ + jal _hv_inquire_topology { - v4int_l r5, zero, r1 /* r5 = width */ - shrui r4, r0, 32 /* r4 = y */ + GET_FIRST_INT(r5, r1) /* r5 = width */ + GET_SECOND_INT(r4, r0) /* r4 = y */ } { - v4int_l r6, zero, r0 /* r6 = x */ + GET_FIRST_INT(r6, r0) /* r6 = x */ mul_lu_lu r4, r4, r5 } { @@ -154,7 +158,7 @@ ENTRY(_start) /* * Load up our per-cpu offset. When the first (master) tile * boots, this value is still zero, so we will load boot_pc - * with start_kernel, and boot_sp with init_stack + THREAD_SIZE. + * with start_kernel, and boot_sp with at the top of init_stack. * The master tile initializes the per-cpu offset array, so that * when subsequent (secondary) tiles boot, they will instead load * from their per-cpu versions of boot_sp and boot_pc. @@ -198,9 +202,9 @@ ENTRY(_start) } ld r0, r0 ld sp, r1 - or r4, sp, r4 + shli r4, r4, CPU_SHIFT + bfins r4, sp, 0, CPU_SHIFT-1 mtspr SPR_SYSTEM_SAVE_K_0, r4 /* save ksp0 + cpu */ - addi sp, sp, -STACK_TOP_DELTA { move lr, zero /* stop backtraces in the called function */ jr r0 diff --git a/arch/tile/kernel/hvglue.S b/arch/tile/kernel/hvglue.S new file mode 100644 index 0000000..2ab4566 --- /dev/null +++ b/arch/tile/kernel/hvglue.S @@ -0,0 +1,74 @@ +/* Hypervisor call vector addresses; see <hv/hypervisor.h> */ +.macro gensym sym, val, size +.org \val +.global _\sym +.type _\sym,function +_\sym: +.size _\sym,\size +#ifndef CONFIG_TILE_HVGLUE_TRACE +.globl \sym +.set \sym,_\sym +#endif +.endm + +.section .hvglue,"x",@nobits +.align 8 +gensym hv_init, 0x20, 32 +gensym hv_install_context, 0x40, 32 +gensym hv_sysconf, 0x60, 32 +gensym hv_get_rtc, 0x80, 32 +gensym hv_set_rtc, 0xa0, 32 +gensym hv_flush_asid, 0xc0, 32 +gensym hv_flush_page, 0xe0, 32 +gensym hv_flush_pages, 0x100, 32 +gensym hv_restart, 0x120, 32 +gensym hv_halt, 0x140, 32 +gensym hv_power_off, 0x160, 32 +gensym hv_inquire_physical, 0x180, 32 +gensym hv_inquire_memory_controller, 0x1a0, 32 +gensym hv_inquire_virtual, 0x1c0, 32 +gensym hv_inquire_asid, 0x1e0, 32 +gensym hv_nanosleep, 0x200, 32 +gensym hv_console_read_if_ready, 0x220, 32 +gensym hv_console_write, 0x240, 32 +gensym hv_downcall_dispatch, 0x260, 32 +gensym hv_inquire_topology, 0x280, 32 +gensym hv_fs_findfile, 0x2a0, 32 +gensym hv_fs_fstat, 0x2c0, 32 +gensym hv_fs_pread, 0x2e0, 32 +gensym hv_physaddr_read64, 0x300, 32 +gensym hv_physaddr_write64, 0x320, 32 +gensym hv_get_command_line, 0x340, 32 +gensym hv_set_caching, 0x360, 32 +gensym hv_bzero_page, 0x380, 32 +gensym hv_register_message_state, 0x3a0, 32 +gensym hv_send_message, 0x3c0, 32 +gensym hv_receive_message, 0x3e0, 32 +gensym hv_inquire_context, 0x400, 32 +gensym hv_start_all_tiles, 0x420, 32 +gensym hv_dev_open, 0x440, 32 +gensym hv_dev_close, 0x460, 32 +gensym hv_dev_pread, 0x480, 32 +gensym hv_dev_pwrite, 0x4a0, 32 +gensym hv_dev_poll, 0x4c0, 32 +gensym hv_dev_poll_cancel, 0x4e0, 32 +gensym hv_dev_preada, 0x500, 32 +gensym hv_dev_pwritea, 0x520, 32 +gensym hv_flush_remote, 0x540, 32 +gensym hv_console_putc, 0x560, 32 +gensym hv_inquire_tiles, 0x580, 32 +gensym hv_confstr, 0x5a0, 32 +gensym hv_reexec, 0x5c0, 32 +gensym hv_set_command_line, 0x5e0, 32 +gensym hv_clear_intr, 0x600, 32 +gensym hv_enable_intr, 0x620, 32 +gensym hv_disable_intr, 0x640, 32 +gensym hv_raise_intr, 0x660, 32 +gensym hv_trigger_ipi, 0x680, 32 +gensym hv_store_mapping, 0x6a0, 32 +gensym hv_inquire_realpa, 0x6c0, 32 +gensym hv_flush_all, 0x6e0, 32 +gensym hv_get_ipi_pte, 0x700, 32 +gensym hv_set_pte_super_shift, 0x720, 32 +gensym hv_console_set_ipi, 0x7e0, 32 +gensym hv_glue_internals, 0x800, 30720 diff --git a/arch/tile/kernel/hvglue.lds b/arch/tile/kernel/hvglue.lds deleted file mode 100644 index d44c5a6..0000000 --- a/arch/tile/kernel/hvglue.lds +++ /dev/null @@ -1,59 +0,0 @@ -/* Hypervisor call vector addresses; see <hv/hypervisor.h> */ -hv_init = TEXT_OFFSET + 0x10020; -hv_install_context = TEXT_OFFSET + 0x10040; -hv_sysconf = TEXT_OFFSET + 0x10060; -hv_get_rtc = TEXT_OFFSET + 0x10080; -hv_set_rtc = TEXT_OFFSET + 0x100a0; -hv_flush_asid = TEXT_OFFSET + 0x100c0; -hv_flush_page = TEXT_OFFSET + 0x100e0; -hv_flush_pages = TEXT_OFFSET + 0x10100; -hv_restart = TEXT_OFFSET + 0x10120; -hv_halt = TEXT_OFFSET + 0x10140; -hv_power_off = TEXT_OFFSET + 0x10160; -hv_inquire_physical = TEXT_OFFSET + 0x10180; -hv_inquire_memory_controller = TEXT_OFFSET + 0x101a0; -hv_inquire_virtual = TEXT_OFFSET + 0x101c0; -hv_inquire_asid = TEXT_OFFSET + 0x101e0; -hv_nanosleep = TEXT_OFFSET + 0x10200; -hv_console_read_if_ready = TEXT_OFFSET + 0x10220; -hv_console_write = TEXT_OFFSET + 0x10240; -hv_downcall_dispatch = TEXT_OFFSET + 0x10260; -hv_inquire_topology = TEXT_OFFSET + 0x10280; -hv_fs_findfile = TEXT_OFFSET + 0x102a0; -hv_fs_fstat = TEXT_OFFSET + 0x102c0; -hv_fs_pread = TEXT_OFFSET + 0x102e0; -hv_physaddr_read64 = TEXT_OFFSET + 0x10300; -hv_physaddr_write64 = TEXT_OFFSET + 0x10320; -hv_get_command_line = TEXT_OFFSET + 0x10340; -hv_set_caching = TEXT_OFFSET + 0x10360; -hv_bzero_page = TEXT_OFFSET + 0x10380; -hv_register_message_state = TEXT_OFFSET + 0x103a0; -hv_send_message = TEXT_OFFSET + 0x103c0; -hv_receive_message = TEXT_OFFSET + 0x103e0; -hv_inquire_context = TEXT_OFFSET + 0x10400; -hv_start_all_tiles = TEXT_OFFSET + 0x10420; -hv_dev_open = TEXT_OFFSET + 0x10440; -hv_dev_close = TEXT_OFFSET + 0x10460; -hv_dev_pread = TEXT_OFFSET + 0x10480; -hv_dev_pwrite = TEXT_OFFSET + 0x104a0; -hv_dev_poll = TEXT_OFFSET + 0x104c0; -hv_dev_poll_cancel = TEXT_OFFSET + 0x104e0; -hv_dev_preada = TEXT_OFFSET + 0x10500; -hv_dev_pwritea = TEXT_OFFSET + 0x10520; -hv_flush_remote = TEXT_OFFSET + 0x10540; -hv_console_putc = TEXT_OFFSET + 0x10560; -hv_inquire_tiles = TEXT_OFFSET + 0x10580; -hv_confstr = TEXT_OFFSET + 0x105a0; -hv_reexec = TEXT_OFFSET + 0x105c0; -hv_set_command_line = TEXT_OFFSET + 0x105e0; -hv_clear_intr = TEXT_OFFSET + 0x10600; -hv_enable_intr = TEXT_OFFSET + 0x10620; -hv_disable_intr = TEXT_OFFSET + 0x10640; -hv_raise_intr = TEXT_OFFSET + 0x10660; -hv_trigger_ipi = TEXT_OFFSET + 0x10680; -hv_store_mapping = TEXT_OFFSET + 0x106a0; -hv_inquire_realpa = TEXT_OFFSET + 0x106c0; -hv_flush_all = TEXT_OFFSET + 0x106e0; -hv_get_ipi_pte = TEXT_OFFSET + 0x10700; -hv_set_pte_super_shift = TEXT_OFFSET + 0x10720; -hv_glue_internals = TEXT_OFFSET + 0x10740; diff --git a/arch/tile/kernel/hvglue_trace.c b/arch/tile/kernel/hvglue_trace.c new file mode 100644 index 0000000..85c74ad --- /dev/null +++ b/arch/tile/kernel/hvglue_trace.c @@ -0,0 +1,266 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* + * Pull in the hypervisor header so we declare all the ABI functions + * with the underscore versions, then undef the names so that we can + * provide our own wrapper versions. + */ +#define hv_init _hv_init +#define hv_install_context _hv_install_context +#define hv_sysconf _hv_sysconf +#define hv_get_rtc _hv_get_rtc +#define hv_set_rtc _hv_set_rtc +#define hv_flush_asid _hv_flush_asid +#define hv_flush_page _hv_flush_page +#define hv_flush_pages _hv_flush_pages +#define hv_restart _hv_restart +#define hv_halt _hv_halt +#define hv_power_off _hv_power_off +#define hv_inquire_physical _hv_inquire_physical +#define hv_inquire_memory_controller _hv_inquire_memory_controller +#define hv_inquire_virtual _hv_inquire_virtual +#define hv_inquire_asid _hv_inquire_asid +#define hv_nanosleep _hv_nanosleep +#define hv_console_read_if_ready _hv_console_read_if_ready +#define hv_console_write _hv_console_write +#define hv_downcall_dispatch _hv_downcall_dispatch +#define hv_inquire_topology _hv_inquire_topology +#define hv_fs_findfile _hv_fs_findfile +#define hv_fs_fstat _hv_fs_fstat +#define hv_fs_pread _hv_fs_pread +#define hv_physaddr_read64 _hv_physaddr_read64 +#define hv_physaddr_write64 _hv_physaddr_write64 +#define hv_get_command_line _hv_get_command_line +#define hv_set_caching _hv_set_caching +#define hv_bzero_page _hv_bzero_page +#define hv_register_message_state _hv_register_message_state +#define hv_send_message _hv_send_message +#define hv_receive_message _hv_receive_message +#define hv_inquire_context _hv_inquire_context +#define hv_start_all_tiles _hv_start_all_tiles +#define hv_dev_open _hv_dev_open +#define hv_dev_close _hv_dev_close +#define hv_dev_pread _hv_dev_pread +#define hv_dev_pwrite _hv_dev_pwrite +#define hv_dev_poll _hv_dev_poll +#define hv_dev_poll_cancel _hv_dev_poll_cancel +#define hv_dev_preada _hv_dev_preada +#define hv_dev_pwritea _hv_dev_pwritea +#define hv_flush_remote _hv_flush_remote +#define hv_console_putc _hv_console_putc +#define hv_inquire_tiles _hv_inquire_tiles +#define hv_confstr _hv_confstr +#define hv_reexec _hv_reexec +#define hv_set_command_line _hv_set_command_line +#define hv_clear_intr _hv_clear_intr +#define hv_enable_intr _hv_enable_intr +#define hv_disable_intr _hv_disable_intr +#define hv_raise_intr _hv_raise_intr +#define hv_trigger_ipi _hv_trigger_ipi +#define hv_store_mapping _hv_store_mapping +#define hv_inquire_realpa _hv_inquire_realpa +#define hv_flush_all _hv_flush_all +#define hv_get_ipi_pte _hv_get_ipi_pte +#define hv_set_pte_super_shift _hv_set_pte_super_shift +#define hv_console_set_ipi _hv_console_set_ipi +#include <hv/hypervisor.h> +#undef hv_init +#undef hv_install_context +#undef hv_sysconf +#undef hv_get_rtc +#undef hv_set_rtc +#undef hv_flush_asid +#undef hv_flush_page +#undef hv_flush_pages +#undef hv_restart +#undef hv_halt +#undef hv_power_off +#undef hv_inquire_physical +#undef hv_inquire_memory_controller +#undef hv_inquire_virtual +#undef hv_inquire_asid +#undef hv_nanosleep +#undef hv_console_read_if_ready +#undef hv_console_write +#undef hv_downcall_dispatch +#undef hv_inquire_topology +#undef hv_fs_findfile +#undef hv_fs_fstat +#undef hv_fs_pread +#undef hv_physaddr_read64 +#undef hv_physaddr_write64 +#undef hv_get_command_line +#undef hv_set_caching +#undef hv_bzero_page +#undef hv_register_message_state +#undef hv_send_message +#undef hv_receive_message +#undef hv_inquire_context +#undef hv_start_all_tiles +#undef hv_dev_open +#undef hv_dev_close +#undef hv_dev_pread +#undef hv_dev_pwrite +#undef hv_dev_poll +#undef hv_dev_poll_cancel +#undef hv_dev_preada +#undef hv_dev_pwritea +#undef hv_flush_remote +#undef hv_console_putc +#undef hv_inquire_tiles +#undef hv_confstr +#undef hv_reexec +#undef hv_set_command_line +#undef hv_clear_intr +#undef hv_enable_intr +#undef hv_disable_intr +#undef hv_raise_intr +#undef hv_trigger_ipi +#undef hv_store_mapping +#undef hv_inquire_realpa +#undef hv_flush_all +#undef hv_get_ipi_pte +#undef hv_set_pte_super_shift +#undef hv_console_set_ipi + +/* + * Provide macros based on <linux/syscalls.h> to provide a wrapper + * function that invokes the same function with an underscore prefix. + * We can't use the existing __SC_xxx macros because we need to + * support up to nine arguments rather than up to six, and also this + * way the file stands alone from possible changes in the + * implementation of <linux/syscalls.h>. + */ +#define HV_WRAP0(type, name) \ + type name(void); \ + type name(void) \ + { \ + return _##name(); \ + } +#define __HV_DECL1(t1, a1) t1 a1 +#define __HV_DECL2(t2, a2, ...) t2 a2, __HV_DECL1(__VA_ARGS__) +#define __HV_DECL3(t3, a3, ...) t3 a3, __HV_DECL2(__VA_ARGS__) +#define __HV_DECL4(t4, a4, ...) t4 a4, __HV_DECL3(__VA_ARGS__) +#define __HV_DECL5(t5, a5, ...) t5 a5, __HV_DECL4(__VA_ARGS__) +#define __HV_DECL6(t6, a6, ...) t6 a6, __HV_DECL5(__VA_ARGS__) +#define __HV_DECL7(t7, a7, ...) t7 a7, __HV_DECL6(__VA_ARGS__) +#define __HV_DECL8(t8, a8, ...) t8 a8, __HV_DECL7(__VA_ARGS__) +#define __HV_DECL9(t9, a9, ...) t9 a9, __HV_DECL8(__VA_ARGS__) +#define __HV_PASS1(t1, a1) a1 +#define __HV_PASS2(t2, a2, ...) a2, __HV_PASS1(__VA_ARGS__) +#define __HV_PASS3(t3, a3, ...) a3, __HV_PASS2(__VA_ARGS__) +#define __HV_PASS4(t4, a4, ...) a4, __HV_PASS3(__VA_ARGS__) +#define __HV_PASS5(t5, a5, ...) a5, __HV_PASS4(__VA_ARGS__) +#define __HV_PASS6(t6, a6, ...) a6, __HV_PASS5(__VA_ARGS__) +#define __HV_PASS7(t7, a7, ...) a7, __HV_PASS6(__VA_ARGS__) +#define __HV_PASS8(t8, a8, ...) a8, __HV_PASS7(__VA_ARGS__) +#define __HV_PASS9(t9, a9, ...) a9, __HV_PASS8(__VA_ARGS__) +#define HV_WRAPx(x, type, name, ...) \ + type name(__HV_DECL##x(__VA_ARGS__)); \ + type name(__HV_DECL##x(__VA_ARGS__)) \ + { \ + return _##name(__HV_PASS##x(__VA_ARGS__)); \ + } +#define HV_WRAP1(type, name, ...) HV_WRAPx(1, type, name, __VA_ARGS__) +#define HV_WRAP2(type, name, ...) HV_WRAPx(2, type, name, __VA_ARGS__) +#define HV_WRAP3(type, name, ...) HV_WRAPx(3, type, name, __VA_ARGS__) +#define HV_WRAP4(type, name, ...) HV_WRAPx(4, type, name, __VA_ARGS__) +#define HV_WRAP5(type, name, ...) HV_WRAPx(5, type, name, __VA_ARGS__) +#define HV_WRAP6(type, name, ...) HV_WRAPx(6, type, name, __VA_ARGS__) +#define HV_WRAP7(type, name, ...) HV_WRAPx(7, type, name, __VA_ARGS__) +#define HV_WRAP8(type, name, ...) HV_WRAPx(8, type, name, __VA_ARGS__) +#define HV_WRAP9(type, name, ...) HV_WRAPx(9, type, name, __VA_ARGS__) + +/* List all the hypervisor API functions. */ +HV_WRAP4(void, hv_init, HV_VersionNumber, interface_version_number, + int, chip_num, int, chip_rev_num, int, client_pl) +HV_WRAP1(long, hv_sysconf, HV_SysconfQuery, query) +HV_WRAP3(int, hv_confstr, HV_ConfstrQuery, query, HV_VirtAddr, buf, int, len) +#if CHIP_HAS_IPI() +HV_WRAP3(int, hv_get_ipi_pte, HV_Coord, tile, int, pl, HV_PTE*, pte) +HV_WRAP3(int, hv_console_set_ipi, int, ipi, int, event, HV_Coord, coord); +#else +HV_WRAP1(void, hv_enable_intr, HV_IntrMask, enab_mask) +HV_WRAP1(void, hv_disable_intr, HV_IntrMask, disab_mask) +HV_WRAP1(void, hv_clear_intr, HV_IntrMask, clear_mask) +HV_WRAP1(void, hv_raise_intr, HV_IntrMask, raise_mask) +HV_WRAP2(HV_Errno, hv_trigger_ipi, HV_Coord, tile, int, interrupt) +#endif /* !CHIP_HAS_IPI() */ +HV_WRAP3(int, hv_store_mapping, HV_VirtAddr, va, unsigned int, len, + HV_PhysAddr, pa) +HV_WRAP2(HV_PhysAddr, hv_inquire_realpa, HV_PhysAddr, cpa, unsigned int, len) +HV_WRAP0(HV_RTCTime, hv_get_rtc) +HV_WRAP1(void, hv_set_rtc, HV_RTCTime, time) +HV_WRAP4(int, hv_install_context, HV_PhysAddr, page_table, HV_PTE, access, + HV_ASID, asid, __hv32, flags) +HV_WRAP2(int, hv_set_pte_super_shift, int, level, int, log2_count) +HV_WRAP0(HV_Context, hv_inquire_context) +HV_WRAP1(int, hv_flush_asid, HV_ASID, asid) +HV_WRAP2(int, hv_flush_page, HV_VirtAddr, address, HV_PageSize, page_size) +HV_WRAP3(int, hv_flush_pages, HV_VirtAddr, start, HV_PageSize, page_size, + unsigned long, size) +HV_WRAP1(int, hv_flush_all, int, preserve_global) +HV_WRAP2(void, hv_restart, HV_VirtAddr, cmd, HV_VirtAddr, args) +HV_WRAP0(void, hv_halt) +HV_WRAP0(void, hv_power_off) +HV_WRAP1(int, hv_reexec, HV_PhysAddr, entry) +HV_WRAP0(HV_Topology, hv_inquire_topology) +HV_WRAP3(HV_Errno, hv_inquire_tiles, HV_InqTileSet, set, HV_VirtAddr, cpumask, + int, length) +HV_WRAP1(HV_PhysAddrRange, hv_inquire_physical, int, idx) +HV_WRAP2(HV_MemoryControllerInfo, hv_inquire_memory_controller, HV_Coord, coord, + int, controller) +HV_WRAP1(HV_VirtAddrRange, hv_inquire_virtual, int, idx) +HV_WRAP1(HV_ASIDRange, hv_inquire_asid, int, idx) +HV_WRAP1(void, hv_nanosleep, int, nanosecs) +HV_WRAP0(int, hv_console_read_if_ready) +HV_WRAP1(void, hv_console_putc, int, byte) +HV_WRAP2(int, hv_console_write, HV_VirtAddr, bytes, int, len) +HV_WRAP0(void, hv_downcall_dispatch) +HV_WRAP1(int, hv_fs_findfile, HV_VirtAddr, filename) +HV_WRAP1(HV_FS_StatInfo, hv_fs_fstat, int, inode) +HV_WRAP4(int, hv_fs_pread, int, inode, HV_VirtAddr, buf, + int, length, int, offset) +HV_WRAP2(unsigned long long, hv_physaddr_read64, HV_PhysAddr, addr, + HV_PTE, access) +HV_WRAP3(void, hv_physaddr_write64, HV_PhysAddr, addr, HV_PTE, access, + unsigned long long, val) +HV_WRAP2(int, hv_get_command_line, HV_VirtAddr, buf, int, length) +HV_WRAP2(HV_Errno, hv_set_command_line, HV_VirtAddr, buf, int, length) +HV_WRAP1(void, hv_set_caching, unsigned long, bitmask) +HV_WRAP2(void, hv_bzero_page, HV_VirtAddr, va, unsigned int, size) +HV_WRAP1(HV_Errno, hv_register_message_state, HV_MsgState*, msgstate) +HV_WRAP4(int, hv_send_message, HV_Recipient *, recips, int, nrecip, + HV_VirtAddr, buf, int, buflen) +HV_WRAP3(HV_RcvMsgInfo, hv_receive_message, HV_MsgState, msgstate, + HV_VirtAddr, buf, int, buflen) +HV_WRAP0(void, hv_start_all_tiles) +HV_WRAP2(int, hv_dev_open, HV_VirtAddr, name, __hv32, flags) +HV_WRAP1(int, hv_dev_close, int, devhdl) +HV_WRAP5(int, hv_dev_pread, int, devhdl, __hv32, flags, HV_VirtAddr, va, + __hv32, len, __hv64, offset) +HV_WRAP5(int, hv_dev_pwrite, int, devhdl, __hv32, flags, HV_VirtAddr, va, + __hv32, len, __hv64, offset) +HV_WRAP3(int, hv_dev_poll, int, devhdl, __hv32, events, HV_IntArg, intarg) +HV_WRAP1(int, hv_dev_poll_cancel, int, devhdl) +HV_WRAP6(int, hv_dev_preada, int, devhdl, __hv32, flags, __hv32, sgl_len, + HV_SGL *, sglp, __hv64, offset, HV_IntArg, intarg) +HV_WRAP6(int, hv_dev_pwritea, int, devhdl, __hv32, flags, __hv32, sgl_len, + HV_SGL *, sglp, __hv64, offset, HV_IntArg, intarg) +HV_WRAP9(int, hv_flush_remote, HV_PhysAddr, cache_pa, + unsigned long, cache_control, unsigned long*, cache_cpumask, + HV_VirtAddr, tlb_va, unsigned long, tlb_length, + unsigned long, tlb_pgsize, unsigned long*, tlb_cpumask, + HV_Remote_ASID*, asids, int, asidcount) diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S index cb52d66..088d5c1 100644 --- a/arch/tile/kernel/intvec_32.S +++ b/arch/tile/kernel/intvec_32.S @@ -28,20 +28,10 @@ #include <arch/interrupts.h> #include <arch/spr_def.h> -#ifdef CONFIG_PREEMPT -# error "No support for kernel preemption currently" -#endif - #define PTREGS_PTR(reg, ptreg) addli reg, sp, C_ABI_SAVE_AREA_SIZE + (ptreg) #define PTREGS_OFFSET_SYSCALL PTREGS_OFFSET_REG(TREG_SYSCALL_NR) -#if !CHIP_HAS_WH64() - /* By making this an empty macro, we can use wh64 in the code. */ - .macro wh64 reg - .endm -#endif - .macro push_reg reg, ptr=sp, delta=-4 { sw \ptr, \reg @@ -189,7 +179,7 @@ intvec_\vecname: * point sp at the top aligned address on the actual stack page. */ mfspr r0, SPR_SYSTEM_SAVE_K_0 - mm r0, r0, zero, LOG2_THREAD_SIZE, 31 + mm r0, r0, zero, LOG2_NR_CPU_IDS, 31 0: /* @@ -207,6 +197,9 @@ intvec_\vecname: * cache line 1: r14...r29 * cache line 0: 2 x frame, r0..r13 */ +#if STACK_TOP_DELTA != 64 +#error STACK_TOP_DELTA must be 64 for assumptions here and in task_pt_regs() +#endif andi r0, r0, -64 /* @@ -326,18 +319,14 @@ intvec_\vecname: movei r3, -1 /* not used, but set for consistency */ } .else -#if CHIP_HAS_AUX_PERF_COUNTERS() .ifc \c_routine, op_handle_aux_perf_interrupt { mfspr r2, AUX_PERF_COUNT_STS movei r3, -1 /* not used, but set for consistency */ } .else -#endif movei r3, 0 -#if CHIP_HAS_AUX_PERF_COUNTERS() .endif -#endif .endif .endif .endif @@ -354,7 +343,7 @@ intvec_\vecname: #ifdef __COLLECT_LINKER_FEEDBACK__ .pushsection .text.intvec_feedback,"ax" .org (\vecnum << 5) - FEEDBACK_ENTER_EXPLICIT(intvec_\vecname, .intrpt1, 1 << 8) + FEEDBACK_ENTER_EXPLICIT(intvec_\vecname, .intrpt, 1 << 8) jrp lr .popsection #endif @@ -468,7 +457,7 @@ intvec_\vecname: } { auli r21, r21, ha16(__per_cpu_offset) - mm r20, r20, zero, 0, LOG2_THREAD_SIZE-1 + mm r20, r20, zero, 0, LOG2_NR_CPU_IDS-1 } s2a r20, r20, r21 lw tp, r20 @@ -562,7 +551,6 @@ intvec_\vecname: .endif mtspr INTERRUPT_CRITICAL_SECTION, zero -#if CHIP_HAS_WH64() /* * Prepare the first 256 stack bytes to be rapidly accessible * without having to fetch the background data. We don't really @@ -583,7 +571,6 @@ intvec_\vecname: addi r52, r52, -64 } wh64 r52 -#endif #ifdef CONFIG_TRACE_IRQFLAGS .ifnc \function,handle_nmi @@ -762,7 +749,7 @@ intvec_\vecname: .macro dc_dispatch vecnum, vecname .org (\vecnum << 8) intvec_\vecname: - j hv_downcall_dispatch + j _hv_downcall_dispatch ENDPROC(intvec_\vecname) .endm @@ -812,17 +799,34 @@ STD_ENTRY(interrupt_return) } lw r29, r29 andi r29, r29, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ + bzt r29, .Lresume_userspace + +#ifdef CONFIG_PREEMPT + /* Returning to kernel space. Check if we need preemption. */ + GET_THREAD_INFO(r29) + addli r28, r29, THREAD_INFO_FLAGS_OFFSET { - bzt r29, .Lresume_userspace - PTREGS_PTR(r29, PTREGS_OFFSET_PC) + lw r28, r28 + addli r29, r29, THREAD_INFO_PREEMPT_COUNT_OFFSET } + { + andi r28, r28, _TIF_NEED_RESCHED + lw r29, r29 + } + bzt r28, 1f + bnz r29, 1f + jal preempt_schedule_irq + FEEDBACK_REENTER(interrupt_return) +1: +#endif /* If we're resuming to _cpu_idle_nap, bump PC forward by 8. */ { - lw r28, r29 + PTREGS_PTR(r29, PTREGS_OFFSET_PC) moveli r27, lo16(_cpu_idle_nap) } { + lw r28, r29 auli r27, r27, ha16(_cpu_idle_nap) } { @@ -1420,7 +1424,6 @@ handle_ill: { lw r0, r0 /* indirect thru thread_info to get task_info*/ addi r1, sp, C_ABI_SAVE_AREA_SIZE /* put ptregs pointer into r1 */ - move r2, zero /* load error code into r2 */ } jal send_sigtrap /* issue a SIGTRAP */ @@ -1518,12 +1521,10 @@ STD_ENTRY(_sys_clone) __HEAD .align 64 /* Align much later jump on the start of a cache line. */ -#if !ATOMIC_LOCKS_FOUND_VIA_TABLE() nop #if PAGE_SIZE >= 0x10000 nop #endif -#endif ENTRY(sys_cmpxchg) /* @@ -1557,45 +1558,6 @@ ENTRY(sys_cmpxchg) # error Code here assumes PAGE_OFFSET can be loaded with just hi16() #endif -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - { - /* Check for unaligned input. */ - bnz sp, .Lcmpxchg_badaddr - mm r25, r0, zero, 3, PAGE_SHIFT-1 - } - { - crc32_32 r25, zero, r25 - moveli r21, lo16(atomic_lock_ptr) - } - { - auli r21, r21, ha16(atomic_lock_ptr) - auli r23, zero, hi16(PAGE_OFFSET) /* hugepage-aligned */ - } - { - shri r20, r25, 32 - ATOMIC_HASH_L1_SHIFT - slt_u r23, r0, r23 - lw r26, r0 /* see comment in the "#else" for the "lw r26". */ - } - { - s2a r21, r20, r21 - bbns r23, .Lcmpxchg_badaddr - } - { - lw r21, r21 - seqi r23, TREG_SYSCALL_NR_NAME, __NR_FAST_cmpxchg64 - andi r25, r25, ATOMIC_HASH_L2_SIZE - 1 - } - { - /* Branch away at this point if we're doing a 64-bit cmpxchg. */ - bbs r23, .Lcmpxchg64 - andi r23, r0, 7 /* Precompute alignment for cmpxchg64. */ - } - { - s2a ATOMIC_LOCK_REG_NAME, r25, r21 - j .Lcmpxchg32_tns /* see comment in the #else for the jump. */ - } - -#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ { /* Check for unaligned input. */ bnz sp, .Lcmpxchg_badaddr @@ -1609,7 +1571,7 @@ ENTRY(sys_cmpxchg) * Because of C pointer arithmetic, we want to compute this: * * ((char*)atomic_locks + - * (((r0 >> 3) & (1 << (ATOMIC_HASH_SIZE - 1))) << 2)) + * (((r0 >> 3) & ((1 << ATOMIC_HASH_SHIFT) - 1)) << 2)) * * Instead of two shifts we just ">> 1", and use 'mm' * to ignore the low and high bits we don't want. @@ -1620,12 +1582,9 @@ ENTRY(sys_cmpxchg) /* * Ensure that the TLB is loaded before we take out the lock. - * On tilepro, this will start fetching the value all the way - * into our L1 as well (and if it gets modified before we - * grab the lock, it will be invalidated from our cache - * before we reload it). On tile64, we'll start fetching it - * into our L1 if we're the home, and if we're not, we'll - * still at least start fetching it into the home's L2. + * This will start fetching the value all the way into our L1 + * as well (and if it gets modified before we grab the lock, + * it will be invalidated from our cache before we reload it). */ lw r26, r0 } @@ -1668,8 +1627,6 @@ ENTRY(sys_cmpxchg) j .Lcmpxchg32_tns } -#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ - /* Symbol for do_page_fault_ics() to use to compare against the PC. */ .global __sys_cmpxchg_grab_lock __sys_cmpxchg_grab_lock: @@ -1807,9 +1764,6 @@ __sys_cmpxchg_grab_lock: .align 64 .Lcmpxchg64: { -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - s2a ATOMIC_LOCK_REG_NAME, r25, r21 -#endif bzt r23, .Lcmpxchg64_tns } j .Lcmpxchg_badaddr @@ -1875,8 +1829,8 @@ int_unalign: push_extra_callee_saves r0 j do_trap -/* Include .intrpt1 array of interrupt vectors */ - .section ".intrpt1", "ax" +/* Include .intrpt array of interrupt vectors */ + .section ".intrpt", "ax" #define op_handle_perf_interrupt bad_intr #define op_handle_aux_perf_interrupt bad_intr @@ -1944,10 +1898,8 @@ int_unalign: do_page_fault int_hand INT_SN_CPL, SN_CPL, bad_intr int_hand INT_DOUBLE_FAULT, DOUBLE_FAULT, do_trap -#if CHIP_HAS_AUX_PERF_COUNTERS() int_hand INT_AUX_PERF_COUNT, AUX_PERF_COUNT, \ op_handle_aux_perf_interrupt, handle_nmi -#endif /* Synthetic interrupt delivered only by the simulator */ int_hand INT_BREAKPOINT, BREAKPOINT, do_breakpoint diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S index 85d4839..ec755d3 100644 --- a/arch/tile/kernel/intvec_64.S +++ b/arch/tile/kernel/intvec_64.S @@ -17,25 +17,33 @@ #include <linux/linkage.h> #include <linux/errno.h> #include <linux/unistd.h> +#include <linux/init.h> #include <asm/ptrace.h> #include <asm/thread_info.h> #include <asm/irqflags.h> #include <asm/asm-offsets.h> #include <asm/types.h> +#include <asm/traps.h> #include <asm/signal.h> #include <hv/hypervisor.h> #include <arch/abi.h> #include <arch/interrupts.h> #include <arch/spr_def.h> -#ifdef CONFIG_PREEMPT -# error "No support for kernel preemption currently" -#endif - #define PTREGS_PTR(reg, ptreg) addli reg, sp, C_ABI_SAVE_AREA_SIZE + (ptreg) #define PTREGS_OFFSET_SYSCALL PTREGS_OFFSET_REG(TREG_SYSCALL_NR) +#if CONFIG_KERNEL_PL == 1 || CONFIG_KERNEL_PL == 2 +/* + * Set "result" non-zero if ex1 holds the PL of the kernel + * (with or without ICS being set). Note this works only + * because we never find the PL at level 3. + */ +# define IS_KERNEL_EX1(result, ex1) andi result, ex1, CONFIG_KERNEL_PL +#else +# error Recode IS_KERNEL_EX1 for CONFIG_KERNEL_PL +#endif .macro push_reg reg, ptr=sp, delta=-8 { @@ -98,6 +106,185 @@ } .endm + /* + * Unalign data exception fast handling: In order to handle + * unaligned data access, a fast JIT version is generated and stored + * in a specific area in user space. We first need to do a quick poke + * to see if the JIT is available. We use certain bits in the fault + * PC (3 to 9 is used for 16KB page size) as index to address the JIT + * code area. The first 64bit word is the fault PC, and the 2nd one is + * the fault bundle itself. If these 2 words both match, then we + * directly "iret" to JIT code. If not, a slow path is invoked to + * generate new JIT code. Note: the current JIT code WILL be + * overwritten if it existed. So, ideally we can handle 128 unalign + * fixups via JIT. For lookup efficiency and to effectively support + * tight loops with multiple unaligned reference, a simple + * direct-mapped cache is used. + * + * SPR_EX_CONTEXT_K_0 is modified to return to JIT code. + * SPR_EX_CONTEXT_K_1 has ICS set. + * SPR_EX_CONTEXT_0_0 is setup to user program's next PC. + * SPR_EX_CONTEXT_0_1 = 0. + */ + .macro int_hand_unalign_fast vecnum, vecname + .org (\vecnum << 8) +intvec_\vecname: + /* Put r3 in SPR_SYSTEM_SAVE_K_1. */ + mtspr SPR_SYSTEM_SAVE_K_1, r3 + + mfspr r3, SPR_EX_CONTEXT_K_1 + /* + * Examine if exception comes from user without ICS set. + * If not, just go directly to the slow path. + */ + bnez r3, hand_unalign_slow_nonuser + + mfspr r3, SPR_SYSTEM_SAVE_K_0 + + /* Get &thread_info->unalign_jit_tmp[0] in r3. */ + bfexts r3, r3, 0, CPU_SHIFT-1 + mm r3, zero, LOG2_THREAD_SIZE, 63 + addli r3, r3, THREAD_INFO_UNALIGN_JIT_TMP_OFFSET + + /* + * Save r0, r1, r2 into thread_info array r3 points to + * from low to high memory in order. + */ + st_add r3, r0, 8 + st_add r3, r1, 8 + { + st_add r3, r2, 8 + andi r2, sp, 7 + } + + /* Save stored r3 value so we can revert it on a page fault. */ + mfspr r1, SPR_SYSTEM_SAVE_K_1 + st r3, r1 + + { + /* Generate a SIGBUS if sp is not 8-byte aligned. */ + bnez r2, hand_unalign_slow_badsp + } + + /* + * Get the thread_info in r0; load r1 with pc. Set the low bit of sp + * as an indicator to the page fault code in case we fault. + */ + { + ori sp, sp, 1 + mfspr r1, SPR_EX_CONTEXT_K_0 + } + + /* Add the jit_info offset in thread_info; extract r1 [3:9] into r2. */ + { + addli r0, r3, THREAD_INFO_UNALIGN_JIT_BASE_OFFSET - \ + (THREAD_INFO_UNALIGN_JIT_TMP_OFFSET + (3 * 8)) + bfextu r2, r1, 3, (2 + PAGE_SHIFT - UNALIGN_JIT_SHIFT) + } + + /* Load the jit_info; multiply r2 by 128. */ + { + ld r0, r0 + shli r2, r2, UNALIGN_JIT_SHIFT + } + + /* + * If r0 is NULL, the JIT page is not mapped, so go to slow path; + * add offset r2 to r0 at the same time. + */ + { + beqz r0, hand_unalign_slow + add r2, r0, r2 + } + + /* + * We are loading from userspace (both the JIT info PC and + * instruction word, and the instruction word we executed) + * and since either could fault while holding the interrupt + * critical section, we must tag this region and check it in + * do_page_fault() to handle it properly. + */ +ENTRY(__start_unalign_asm_code) + + /* Load first word of JIT in r0 and increment r2 by 8. */ + ld_add r0, r2, 8 + + /* + * Compare the PC with the 1st word in JIT; load the fault bundle + * into r1. + */ + { + cmpeq r0, r0, r1 + ld r1, r1 + } + + /* Go to slow path if PC doesn't match. */ + beqz r0, hand_unalign_slow + + /* + * Load the 2nd word of JIT, which is supposed to be the fault + * bundle for a cache hit. Increment r2; after this bundle r2 will + * point to the potential start of the JIT code we want to run. + */ + ld_add r0, r2, 8 + + /* No further accesses to userspace are done after this point. */ +ENTRY(__end_unalign_asm_code) + + /* Compare the real bundle with what is saved in the JIT area. */ + { + cmpeq r0, r1, r0 + mtspr SPR_EX_CONTEXT_0_1, zero + } + + /* Go to slow path if the fault bundle does not match. */ + beqz r0, hand_unalign_slow + + /* + * A cache hit is found. + * r2 points to start of JIT code (3rd word). + * r0 is the fault pc. + * r1 is the fault bundle. + * Reset the low bit of sp. + */ + { + mfspr r0, SPR_EX_CONTEXT_K_0 + andi sp, sp, ~1 + } + + /* Write r2 into EX_CONTEXT_K_0 and increment PC. */ + { + mtspr SPR_EX_CONTEXT_K_0, r2 + addi r0, r0, 8 + } + + /* + * Set ICS on kernel EX_CONTEXT_K_1 in order to "iret" to + * user with ICS set. This way, if the JIT fixup causes another + * unalign exception (which shouldn't be possible) the user + * process will be terminated with SIGBUS. Also, our fixup will + * run without interleaving with external interrupts. + * Each fixup is at most 14 bundles, so it won't hold ICS for long. + */ + { + movei r1, PL_ICS_EX1(USER_PL, 1) + mtspr SPR_EX_CONTEXT_0_0, r0 + } + + { + mtspr SPR_EX_CONTEXT_K_1, r1 + addi r3, r3, -(3 * 8) + } + + /* Restore r0..r3. */ + ld_add r0, r3, 8 + ld_add r1, r3, 8 + ld_add r2, r3, 8 + ld r3, r3 + + iret + ENDPROC(intvec_\vecname) + .endm #ifdef __COLLECT_LINKER_FEEDBACK__ .pushsection .text.intvec_feedback,"ax" @@ -118,15 +305,21 @@ intvec_feedback: * The "processing" argument specifies the code for processing * the interrupt. Defaults to "handle_interrupt". */ - .macro int_hand vecnum, vecname, c_routine, processing=handle_interrupt - .org (\vecnum << 8) + .macro __int_hand vecnum, vecname, c_routine,processing=handle_interrupt intvec_\vecname: /* Temporarily save a register so we have somewhere to work. */ mtspr SPR_SYSTEM_SAVE_K_1, r0 mfspr r0, SPR_EX_CONTEXT_K_1 - andi r0, r0, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ + /* + * The unalign data fastpath code sets the low bit in sp to + * force us to reset it here on fault. + */ + { + blbs sp, 2f + IS_KERNEL_EX1(r0, r0) + } .ifc \vecnum, INT_DOUBLE_FAULT /* @@ -176,15 +369,15 @@ intvec_\vecname: } .endif - +2: /* - * SYSTEM_SAVE_K_0 holds the cpu number in the low bits, and - * the current stack top in the higher bits. So we recover - * our stack top by just masking off the low bits, then + * SYSTEM_SAVE_K_0 holds the cpu number in the high bits, and + * the current stack top in the lower bits. So we recover + * our starting stack value by sign-extending the low bits, then * point sp at the top aligned address on the actual stack page. */ mfspr r0, SPR_SYSTEM_SAVE_K_0 - mm r0, zero, LOG2_THREAD_SIZE, 63 + bfexts r0, r0, 0, CPU_SHIFT-1 0: /* @@ -206,6 +399,9 @@ intvec_\vecname: * cache line 1: r6...r13 * cache line 0: 2 x frame, r0..r5 */ +#if STACK_TOP_DELTA != 64 +#error STACK_TOP_DELTA must be 64 for assumptions here and in task_pt_regs() +#endif andi r0, r0, -64 /* @@ -305,7 +501,7 @@ intvec_\vecname: mfspr r3, SPR_SYSTEM_SAVE_K_2 /* info about page fault */ .else .ifc \vecnum, INT_ILL_TRANS - mfspr r2, ILL_TRANS_REASON + mfspr r2, ILL_VA_PC .else .ifc \vecnum, INT_DOUBLE_FAULT mfspr r2, SPR_SYSTEM_SAVE_K_2 /* double fault info from HV */ @@ -315,12 +511,10 @@ intvec_\vecname: .else .ifc \c_routine, op_handle_perf_interrupt mfspr r2, PERF_COUNT_STS -#if CHIP_HAS_AUX_PERF_COUNTERS() .else .ifc \c_routine, op_handle_aux_perf_interrupt mfspr r2, AUX_PERF_COUNT_STS .endif -#endif .endif .endif .endif @@ -339,7 +533,7 @@ intvec_\vecname: #ifdef __COLLECT_LINKER_FEEDBACK__ .pushsection .text.intvec_feedback,"ax" .org (\vecnum << 5) - FEEDBACK_ENTER_EXPLICIT(intvec_\vecname, .intrpt1, 1 << 8) + FEEDBACK_ENTER_EXPLICIT(intvec_\vecname, .intrpt, 1 << 8) jrp lr .popsection #endif @@ -455,11 +649,12 @@ intvec_\vecname: /* * If we will be returning to the kernel, we will need to * reset the interrupt masks to the state they had before. - * Set DISABLE_IRQ in flags iff we came from PL1 with irqs disabled. + * Set DISABLE_IRQ in flags iff we came from kernel pl with + * irqs disabled. */ mfspr r32, SPR_EX_CONTEXT_K_1 { - andi r32, r32, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ + IS_KERNEL_EX1(r22, r22) PTREGS_PTR(r21, PTREGS_OFFSET_FLAGS) } beqzt r32, 1f /* zero if from user space */ @@ -503,7 +698,7 @@ intvec_\vecname: } { shl16insli r21, r21, hw1(__per_cpu_offset) - bfextu r20, r20, 0, LOG2_THREAD_SIZE-1 + bfextu r20, r20, CPU_SHIFT, 63 } shl16insli r21, r21, hw0(__per_cpu_offset) shl3add r20, r20, r21 @@ -585,7 +780,7 @@ intvec_\vecname: .macro dc_dispatch vecnum, vecname .org (\vecnum << 8) intvec_\vecname: - j hv_downcall_dispatch + j _hv_downcall_dispatch ENDPROC(intvec_\vecname) .endm @@ -626,14 +821,36 @@ STD_ENTRY(interrupt_return) PTREGS_PTR(r29, PTREGS_OFFSET_EX1) } ld r29, r29 - andi r29, r29, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ + IS_KERNEL_EX1(r29, r29) { beqzt r29, .Lresume_userspace - PTREGS_PTR(r29, PTREGS_OFFSET_PC) + move r29, sp + } + +#ifdef CONFIG_PREEMPT + /* Returning to kernel space. Check if we need preemption. */ + EXTRACT_THREAD_INFO(r29) + addli r28, r29, THREAD_INFO_FLAGS_OFFSET + { + ld r28, r28 + addli r29, r29, THREAD_INFO_PREEMPT_COUNT_OFFSET + } + { + andi r28, r28, _TIF_NEED_RESCHED + ld4s r29, r29 } + beqzt r28, 1f + bnez r29, 1f + jal preempt_schedule_irq + FEEDBACK_REENTER(interrupt_return) +1: +#endif /* If we're resuming to _cpu_idle_nap, bump PC forward by 8. */ - moveli r27, hw2_last(_cpu_idle_nap) + { + moveli r27, hw2_last(_cpu_idle_nap) + PTREGS_PTR(r29, PTREGS_OFFSET_PC) + } { ld r28, r29 shl16insli r27, r27, hw1(_cpu_idle_nap) @@ -728,7 +945,7 @@ STD_ENTRY(interrupt_return) PTREGS_PTR(r32, PTREGS_OFFSET_FLAGS) } { - andi r0, r0, SPR_EX_CONTEXT_1_1__PL_MASK + IS_KERNEL_EX1(r0, r0) ld r32, r32 } bnez r0, 1f @@ -799,7 +1016,7 @@ STD_ENTRY(interrupt_return) pop_reg r21, sp, PTREGS_OFFSET_REG(31) - PTREGS_OFFSET_PC { mtspr SPR_EX_CONTEXT_K_1, lr - andi lr, lr, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ + IS_KERNEL_EX1(lr, lr) } { mtspr SPR_EX_CONTEXT_K_0, r21 @@ -1223,10 +1440,31 @@ STD_ENTRY(_sys_clone) j sys_clone STD_ENDPROC(_sys_clone) -/* The single-step support may need to read all the registers. */ + /* + * Recover r3, r2, r1 and r0 here saved by unalign fast vector. + * The vector area limit is 32 bundles, so we handle the reload here. + * r0, r1, r2 are in thread_info from low to high memory in order. + * r3 points to location the original r3 was saved. + * We put this code in the __HEAD section so it can be reached + * via a conditional branch from the fast path. + */ + __HEAD +hand_unalign_slow: + andi sp, sp, ~1 +hand_unalign_slow_badsp: + addi r3, r3, -(3 * 8) + ld_add r0, r3, 8 + ld_add r1, r3, 8 + ld r2, r3 +hand_unalign_slow_nonuser: + mfspr r3, SPR_SYSTEM_SAVE_K_1 + __int_hand INT_UNALIGN_DATA, UNALIGN_DATA_SLOW, int_unalign + +/* The unaligned data support needs to read all the registers. */ int_unalign: push_extra_callee_saves r0 - j do_trap + j do_unaligned +ENDPROC(hand_unalign_slow) /* Fill the return address stack with nonzero entries. */ STD_ENTRY(fill_ra_stack) @@ -1240,8 +1478,15 @@ STD_ENTRY(fill_ra_stack) 4: jrp r0 STD_ENDPROC(fill_ra_stack) -/* Include .intrpt1 array of interrupt vectors */ - .section ".intrpt1", "ax" + .macro int_hand vecnum, vecname, c_routine, processing=handle_interrupt + .org (\vecnum << 8) + __int_hand \vecnum, \vecname, \c_routine, \processing + .endm + +/* Include .intrpt array of interrupt vectors */ + .section ".intrpt", "ax" + .global intrpt_start +intrpt_start: #define op_handle_perf_interrupt bad_intr #define op_handle_aux_perf_interrupt bad_intr @@ -1272,7 +1517,7 @@ STD_ENTRY(fill_ra_stack) int_hand INT_SWINT_1, SWINT_1, SYSCALL, handle_syscall int_hand INT_SWINT_0, SWINT_0, do_trap int_hand INT_ILL_TRANS, ILL_TRANS, do_trap - int_hand INT_UNALIGN_DATA, UNALIGN_DATA, int_unalign + int_hand_unalign_fast INT_UNALIGN_DATA, UNALIGN_DATA int_hand INT_DTLB_MISS, DTLB_MISS, do_page_fault int_hand INT_DTLB_ACCESS, DTLB_ACCESS, do_page_fault int_hand INT_IDN_FIREWALL, IDN_FIREWALL, do_hardwall_trap diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c index 3ccf2cd..0586fdb 100644 --- a/arch/tile/kernel/irq.c +++ b/arch/tile/kernel/irq.c @@ -55,7 +55,8 @@ static DEFINE_PER_CPU(int, irq_depth); /* State for allocating IRQs on Gx. */ #if CHIP_HAS_IPI() -static unsigned long available_irqs = ~(1UL << IRQ_RESCHEDULE); +static unsigned long available_irqs = ((1UL << NR_IRQS) - 1) & + (~(1UL << IRQ_RESCHEDULE)); static DEFINE_SPINLOCK(available_irqs_lock); #endif @@ -73,7 +74,8 @@ static DEFINE_SPINLOCK(available_irqs_lock); /* * The interrupt handling path, implemented in terms of HV interrupt - * emulation on TILE64 and TILEPro, and IPI hardware on TILE-Gx. + * emulation on TILEPro, and IPI hardware on TILE-Gx. + * Entered with interrupts disabled. */ void tile_dev_intr(struct pt_regs *regs, int intnum) { @@ -233,7 +235,7 @@ void tile_irq_activate(unsigned int irq, int tile_irq_type) { /* * We use handle_level_irq() by default because the pending - * interrupt vector (whether modeled by the HV on TILE64 and + * interrupt vector (whether modeled by the HV on * TILEPro or implemented in hardware on TILE-Gx) has * level-style semantics for each bit. An interrupt fires * whenever a bit is high, not just at edges. diff --git a/arch/tile/kernel/kgdb.c b/arch/tile/kernel/kgdb.c new file mode 100644 index 0000000..4cd8838 --- /dev/null +++ b/arch/tile/kernel/kgdb.c @@ -0,0 +1,499 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * TILE-Gx KGDB support. + */ + +#include <linux/ptrace.h> +#include <linux/kgdb.h> +#include <linux/kdebug.h> +#include <linux/uaccess.h> +#include <linux/module.h> +#include <asm/cacheflush.h> + +static tile_bundle_bits singlestep_insn = TILEGX_BPT_BUNDLE | DIE_SSTEPBP; +static unsigned long stepped_addr; +static tile_bundle_bits stepped_instr; + +struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = { + { "r0", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[0])}, + { "r1", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[1])}, + { "r2", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[2])}, + { "r3", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[3])}, + { "r4", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[4])}, + { "r5", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[5])}, + { "r6", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[6])}, + { "r7", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[7])}, + { "r8", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[8])}, + { "r9", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[9])}, + { "r10", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[10])}, + { "r11", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[11])}, + { "r12", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[12])}, + { "r13", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[13])}, + { "r14", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[14])}, + { "r15", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[15])}, + { "r16", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[16])}, + { "r17", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[17])}, + { "r18", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[18])}, + { "r19", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[19])}, + { "r20", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[20])}, + { "r21", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[21])}, + { "r22", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[22])}, + { "r23", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[23])}, + { "r24", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[24])}, + { "r25", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[25])}, + { "r26", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[26])}, + { "r27", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[27])}, + { "r28", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[28])}, + { "r29", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[29])}, + { "r30", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[30])}, + { "r31", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[31])}, + { "r32", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[32])}, + { "r33", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[33])}, + { "r34", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[34])}, + { "r35", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[35])}, + { "r36", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[36])}, + { "r37", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[37])}, + { "r38", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[38])}, + { "r39", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[39])}, + { "r40", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[40])}, + { "r41", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[41])}, + { "r42", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[42])}, + { "r43", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[43])}, + { "r44", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[44])}, + { "r45", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[45])}, + { "r46", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[46])}, + { "r47", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[47])}, + { "r48", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[48])}, + { "r49", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[49])}, + { "r50", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[50])}, + { "r51", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[51])}, + { "r52", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[52])}, + { "tp", GDB_SIZEOF_REG, offsetof(struct pt_regs, tp)}, + { "sp", GDB_SIZEOF_REG, offsetof(struct pt_regs, sp)}, + { "lr", GDB_SIZEOF_REG, offsetof(struct pt_regs, lr)}, + { "sn", GDB_SIZEOF_REG, -1}, + { "idn0", GDB_SIZEOF_REG, -1}, + { "idn1", GDB_SIZEOF_REG, -1}, + { "udn0", GDB_SIZEOF_REG, -1}, + { "udn1", GDB_SIZEOF_REG, -1}, + { "udn2", GDB_SIZEOF_REG, -1}, + { "udn3", GDB_SIZEOF_REG, -1}, + { "zero", GDB_SIZEOF_REG, -1}, + { "pc", GDB_SIZEOF_REG, offsetof(struct pt_regs, pc)}, + { "faultnum", GDB_SIZEOF_REG, offsetof(struct pt_regs, faultnum)}, +}; + +char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs) +{ + if (regno >= DBG_MAX_REG_NUM || regno < 0) + return NULL; + + if (dbg_reg_def[regno].offset != -1) + memcpy(mem, (void *)regs + dbg_reg_def[regno].offset, + dbg_reg_def[regno].size); + else + memset(mem, 0, dbg_reg_def[regno].size); + return dbg_reg_def[regno].name; +} + +int dbg_set_reg(int regno, void *mem, struct pt_regs *regs) +{ + if (regno >= DBG_MAX_REG_NUM || regno < 0) + return -EINVAL; + + if (dbg_reg_def[regno].offset != -1) + memcpy((void *)regs + dbg_reg_def[regno].offset, mem, + dbg_reg_def[regno].size); + return 0; +} + +/* + * Similar to pt_regs_to_gdb_regs() except that process is sleeping and so + * we may not be able to get all the info. + */ +void +sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task) +{ + int reg; + struct pt_regs *thread_regs; + unsigned long *ptr = gdb_regs; + + if (task == NULL) + return; + + /* Initialize to zero. */ + memset(gdb_regs, 0, NUMREGBYTES); + + thread_regs = task_pt_regs(task); + for (reg = 0; reg <= TREG_LAST_GPR; reg++) + *(ptr++) = thread_regs->regs[reg]; + + gdb_regs[TILEGX_PC_REGNUM] = thread_regs->pc; + gdb_regs[TILEGX_FAULTNUM_REGNUM] = thread_regs->faultnum; +} + +void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc) +{ + regs->pc = pc; +} + +static void kgdb_call_nmi_hook(void *ignored) +{ + kgdb_nmicallback(raw_smp_processor_id(), NULL); +} + +void kgdb_roundup_cpus(unsigned long flags) +{ + local_irq_enable(); + smp_call_function(kgdb_call_nmi_hook, NULL, 0); + local_irq_disable(); +} + +/* + * Convert a kernel address to the writable kernel text mapping. + */ +static unsigned long writable_address(unsigned long addr) +{ + unsigned long ret = 0; + + if (core_kernel_text(addr)) + ret = addr - MEM_SV_START + PAGE_OFFSET; + else if (is_module_text_address(addr)) + ret = addr; + else + pr_err("Unknown virtual address 0x%lx\n", addr); + + return ret; +} + +/* + * Calculate the new address for after a step. + */ +static unsigned long get_step_address(struct pt_regs *regs) +{ + int src_reg; + int jump_off; + int br_off; + unsigned long addr; + unsigned int opcode; + tile_bundle_bits bundle; + + /* Move to the next instruction by default. */ + addr = regs->pc + TILEGX_BUNDLE_SIZE_IN_BYTES; + bundle = *(unsigned long *)instruction_pointer(regs); + + /* 0: X mode, Otherwise: Y mode. */ + if (bundle & TILEGX_BUNDLE_MODE_MASK) { + if (get_Opcode_Y1(bundle) == RRR_1_OPCODE_Y1 && + get_RRROpcodeExtension_Y1(bundle) == + UNARY_RRR_1_OPCODE_Y1) { + opcode = get_UnaryOpcodeExtension_Y1(bundle); + + switch (opcode) { + case JALR_UNARY_OPCODE_Y1: + case JALRP_UNARY_OPCODE_Y1: + case JR_UNARY_OPCODE_Y1: + case JRP_UNARY_OPCODE_Y1: + src_reg = get_SrcA_Y1(bundle); + dbg_get_reg(src_reg, &addr, regs); + break; + } + } + } else if (get_Opcode_X1(bundle) == RRR_0_OPCODE_X1) { + if (get_RRROpcodeExtension_X1(bundle) == + UNARY_RRR_0_OPCODE_X1) { + opcode = get_UnaryOpcodeExtension_X1(bundle); + + switch (opcode) { + case JALR_UNARY_OPCODE_X1: + case JALRP_UNARY_OPCODE_X1: + case JR_UNARY_OPCODE_X1: + case JRP_UNARY_OPCODE_X1: + src_reg = get_SrcA_X1(bundle); + dbg_get_reg(src_reg, &addr, regs); + break; + } + } + } else if (get_Opcode_X1(bundle) == JUMP_OPCODE_X1) { + opcode = get_JumpOpcodeExtension_X1(bundle); + + switch (opcode) { + case JAL_JUMP_OPCODE_X1: + case J_JUMP_OPCODE_X1: + jump_off = sign_extend(get_JumpOff_X1(bundle), 27); + addr = regs->pc + + (jump_off << TILEGX_LOG2_BUNDLE_SIZE_IN_BYTES); + break; + } + } else if (get_Opcode_X1(bundle) == BRANCH_OPCODE_X1) { + br_off = 0; + opcode = get_BrType_X1(bundle); + + switch (opcode) { + case BEQZT_BRANCH_OPCODE_X1: + case BEQZ_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) == 0) + br_off = get_BrOff_X1(bundle); + break; + case BGEZT_BRANCH_OPCODE_X1: + case BGEZ_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) >= 0) + br_off = get_BrOff_X1(bundle); + break; + case BGTZT_BRANCH_OPCODE_X1: + case BGTZ_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) > 0) + br_off = get_BrOff_X1(bundle); + break; + case BLBCT_BRANCH_OPCODE_X1: + case BLBC_BRANCH_OPCODE_X1: + if (!(get_SrcA_X1(bundle) & 1)) + br_off = get_BrOff_X1(bundle); + break; + case BLBST_BRANCH_OPCODE_X1: + case BLBS_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) & 1) + br_off = get_BrOff_X1(bundle); + break; + case BLEZT_BRANCH_OPCODE_X1: + case BLEZ_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) <= 0) + br_off = get_BrOff_X1(bundle); + break; + case BLTZT_BRANCH_OPCODE_X1: + case BLTZ_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) < 0) + br_off = get_BrOff_X1(bundle); + break; + case BNEZT_BRANCH_OPCODE_X1: + case BNEZ_BRANCH_OPCODE_X1: + if (get_SrcA_X1(bundle) != 0) + br_off = get_BrOff_X1(bundle); + break; + } + + if (br_off != 0) { + br_off = sign_extend(br_off, 17); + addr = regs->pc + + (br_off << TILEGX_LOG2_BUNDLE_SIZE_IN_BYTES); + } + } + + return addr; +} + +/* + * Replace the next instruction after the current instruction with a + * breakpoint instruction. + */ +static void do_single_step(struct pt_regs *regs) +{ + unsigned long addr_wr; + + /* Determine where the target instruction will send us to. */ + stepped_addr = get_step_address(regs); + probe_kernel_read((char *)&stepped_instr, (char *)stepped_addr, + BREAK_INSTR_SIZE); + + addr_wr = writable_address(stepped_addr); + probe_kernel_write((char *)addr_wr, (char *)&singlestep_insn, + BREAK_INSTR_SIZE); + smp_wmb(); + flush_icache_range(stepped_addr, stepped_addr + BREAK_INSTR_SIZE); +} + +static void undo_single_step(struct pt_regs *regs) +{ + unsigned long addr_wr; + + if (stepped_instr == 0) + return; + + addr_wr = writable_address(stepped_addr); + probe_kernel_write((char *)addr_wr, (char *)&stepped_instr, + BREAK_INSTR_SIZE); + stepped_instr = 0; + smp_wmb(); + flush_icache_range(stepped_addr, stepped_addr + BREAK_INSTR_SIZE); +} + +/* + * Calls linux_debug_hook before the kernel dies. If KGDB is enabled, + * then try to fall into the debugger. + */ +static int +kgdb_notify(struct notifier_block *self, unsigned long cmd, void *ptr) +{ + int ret; + unsigned long flags; + struct die_args *args = (struct die_args *)ptr; + struct pt_regs *regs = args->regs; + +#ifdef CONFIG_KPROBES + /* + * Return immediately if the kprobes fault notifier has set + * DIE_PAGE_FAULT. + */ + if (cmd == DIE_PAGE_FAULT) + return NOTIFY_DONE; +#endif /* CONFIG_KPROBES */ + + switch (cmd) { + case DIE_BREAK: + case DIE_COMPILED_BPT: + break; + case DIE_SSTEPBP: + local_irq_save(flags); + kgdb_handle_exception(0, SIGTRAP, 0, regs); + local_irq_restore(flags); + return NOTIFY_STOP; + default: + /* Userspace events, ignore. */ + if (user_mode(regs)) + return NOTIFY_DONE; + } + + local_irq_save(flags); + ret = kgdb_handle_exception(args->trapnr, args->signr, args->err, regs); + local_irq_restore(flags); + if (ret) + return NOTIFY_DONE; + + return NOTIFY_STOP; +} + +static struct notifier_block kgdb_notifier = { + .notifier_call = kgdb_notify, +}; + +/* + * kgdb_arch_handle_exception - Handle architecture specific GDB packets. + * @vector: The error vector of the exception that happened. + * @signo: The signal number of the exception that happened. + * @err_code: The error code of the exception that happened. + * @remcom_in_buffer: The buffer of the packet we have read. + * @remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into. + * @regs: The &struct pt_regs of the current process. + * + * This function MUST handle the 'c' and 's' command packets, + * as well packets to set / remove a hardware breakpoint, if used. + * If there are additional packets which the hardware needs to handle, + * they are handled here. The code should return -1 if it wants to + * process more packets, and a %0 or %1 if it wants to exit from the + * kgdb callback. + */ +int kgdb_arch_handle_exception(int vector, int signo, int err_code, + char *remcom_in_buffer, char *remcom_out_buffer, + struct pt_regs *regs) +{ + char *ptr; + unsigned long address; + + /* Undo any stepping we may have done. */ + undo_single_step(regs); + + switch (remcom_in_buffer[0]) { + case 'c': + case 's': + case 'D': + case 'k': + /* + * Try to read optional parameter, pc unchanged if no parm. + * If this was a compiled-in breakpoint, we need to move + * to the next instruction or we will just breakpoint + * over and over again. + */ + ptr = &remcom_in_buffer[1]; + if (kgdb_hex2long(&ptr, &address)) + regs->pc = address; + else if (*(unsigned long *)regs->pc == compiled_bpt) + regs->pc += BREAK_INSTR_SIZE; + + if (remcom_in_buffer[0] == 's') { + do_single_step(regs); + kgdb_single_step = 1; + atomic_set(&kgdb_cpu_doing_single_step, + raw_smp_processor_id()); + } else + atomic_set(&kgdb_cpu_doing_single_step, -1); + + return 0; + } + + return -1; /* this means that we do not want to exit from the handler */ +} + +struct kgdb_arch arch_kgdb_ops; + +/* + * kgdb_arch_init - Perform any architecture specific initalization. + * + * This function will handle the initalization of any architecture + * specific callbacks. + */ +int kgdb_arch_init(void) +{ + tile_bundle_bits bundle = TILEGX_BPT_BUNDLE; + + memcpy(arch_kgdb_ops.gdb_bpt_instr, &bundle, BREAK_INSTR_SIZE); + return register_die_notifier(&kgdb_notifier); +} + +/* + * kgdb_arch_exit - Perform any architecture specific uninitalization. + * + * This function will handle the uninitalization of any architecture + * specific callbacks, for dynamic registration and unregistration. + */ +void kgdb_arch_exit(void) +{ + unregister_die_notifier(&kgdb_notifier); +} + +int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt) +{ + int err; + unsigned long addr_wr = writable_address(bpt->bpt_addr); + + if (addr_wr == 0) + return -1; + + err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr, + BREAK_INSTR_SIZE); + if (err) + return err; + + err = probe_kernel_write((char *)addr_wr, arch_kgdb_ops.gdb_bpt_instr, + BREAK_INSTR_SIZE); + smp_wmb(); + flush_icache_range((unsigned long)bpt->bpt_addr, + (unsigned long)bpt->bpt_addr + BREAK_INSTR_SIZE); + return err; +} + +int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt) +{ + int err; + unsigned long addr_wr = writable_address(bpt->bpt_addr); + + if (addr_wr == 0) + return -1; + + err = probe_kernel_write((char *)addr_wr, (char *)bpt->saved_instr, + BREAK_INSTR_SIZE); + smp_wmb(); + flush_icache_range((unsigned long)bpt->bpt_addr, + (unsigned long)bpt->bpt_addr + BREAK_INSTR_SIZE); + return err; +} diff --git a/arch/tile/kernel/kprobes.c b/arch/tile/kernel/kprobes.c new file mode 100644 index 0000000..27cdcac --- /dev/null +++ b/arch/tile/kernel/kprobes.c @@ -0,0 +1,528 @@ +/* + * arch/tile/kernel/kprobes.c + * Kprobes on TILE-Gx + * + * Some portions copied from the MIPS version. + * + * Copyright (C) IBM Corporation, 2002, 2004 + * Copyright 2006 Sony Corp. + * Copyright 2010 Cavium Networks + * + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/kprobes.h> +#include <linux/kdebug.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <asm/cacheflush.h> + +#include <arch/opcode.h> + +DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL; +DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); + +tile_bundle_bits breakpoint_insn = TILEGX_BPT_BUNDLE; +tile_bundle_bits breakpoint2_insn = TILEGX_BPT_BUNDLE | DIE_SSTEPBP; + +/* + * Check whether instruction is branch or jump, or if executing it + * has different results depending on where it is executed (e.g. lnk). + */ +static int __kprobes insn_has_control(kprobe_opcode_t insn) +{ + if (get_Mode(insn) != 0) { /* Y-format bundle */ + if (get_Opcode_Y1(insn) != RRR_1_OPCODE_Y1 || + get_RRROpcodeExtension_Y1(insn) != UNARY_RRR_1_OPCODE_Y1) + return 0; + + switch (get_UnaryOpcodeExtension_Y1(insn)) { + case JALRP_UNARY_OPCODE_Y1: + case JALR_UNARY_OPCODE_Y1: + case JRP_UNARY_OPCODE_Y1: + case JR_UNARY_OPCODE_Y1: + case LNK_UNARY_OPCODE_Y1: + return 1; + default: + return 0; + } + } + + switch (get_Opcode_X1(insn)) { + case BRANCH_OPCODE_X1: /* branch instructions */ + case JUMP_OPCODE_X1: /* jump instructions: j and jal */ + return 1; + + case RRR_0_OPCODE_X1: /* other jump instructions */ + if (get_RRROpcodeExtension_X1(insn) != UNARY_RRR_0_OPCODE_X1) + return 0; + switch (get_UnaryOpcodeExtension_X1(insn)) { + case JALRP_UNARY_OPCODE_X1: + case JALR_UNARY_OPCODE_X1: + case JRP_UNARY_OPCODE_X1: + case JR_UNARY_OPCODE_X1: + case LNK_UNARY_OPCODE_X1: + return 1; + default: + return 0; + } + default: + return 0; + } +} + +int __kprobes arch_prepare_kprobe(struct kprobe *p) +{ + unsigned long addr = (unsigned long)p->addr; + + if (addr & (sizeof(kprobe_opcode_t) - 1)) + return -EINVAL; + + if (insn_has_control(*p->addr)) { + pr_notice("Kprobes for control instructions are not " + "supported\n"); + return -EINVAL; + } + + /* insn: must be on special executable page on tile. */ + p->ainsn.insn = get_insn_slot(); + if (!p->ainsn.insn) + return -ENOMEM; + + /* + * In the kprobe->ainsn.insn[] array we store the original + * instruction at index zero and a break trap instruction at + * index one. + */ + memcpy(&p->ainsn.insn[0], p->addr, sizeof(kprobe_opcode_t)); + p->ainsn.insn[1] = breakpoint2_insn; + p->opcode = *p->addr; + + return 0; +} + +void __kprobes arch_arm_kprobe(struct kprobe *p) +{ + unsigned long addr_wr; + + /* Operate on writable kernel text mapping. */ + addr_wr = (unsigned long)p->addr - MEM_SV_START + PAGE_OFFSET; + + if (probe_kernel_write((void *)addr_wr, &breakpoint_insn, + sizeof(breakpoint_insn))) + pr_err("%s: failed to enable kprobe\n", __func__); + + smp_wmb(); + flush_insn_slot(p); +} + +void __kprobes arch_disarm_kprobe(struct kprobe *kp) +{ + unsigned long addr_wr; + + /* Operate on writable kernel text mapping. */ + addr_wr = (unsigned long)kp->addr - MEM_SV_START + PAGE_OFFSET; + + if (probe_kernel_write((void *)addr_wr, &kp->opcode, + sizeof(kp->opcode))) + pr_err("%s: failed to enable kprobe\n", __func__); + + smp_wmb(); + flush_insn_slot(kp); +} + +void __kprobes arch_remove_kprobe(struct kprobe *p) +{ + if (p->ainsn.insn) { + free_insn_slot(p->ainsn.insn, 0); + p->ainsn.insn = NULL; + } +} + +static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb) +{ + kcb->prev_kprobe.kp = kprobe_running(); + kcb->prev_kprobe.status = kcb->kprobe_status; + kcb->prev_kprobe.saved_pc = kcb->kprobe_saved_pc; +} + +static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb) +{ + __this_cpu_write(current_kprobe, kcb->prev_kprobe.kp); + kcb->kprobe_status = kcb->prev_kprobe.status; + kcb->kprobe_saved_pc = kcb->prev_kprobe.saved_pc; +} + +static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs, + struct kprobe_ctlblk *kcb) +{ + __this_cpu_write(current_kprobe, p); + kcb->kprobe_saved_pc = regs->pc; +} + +static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs) +{ + /* Single step inline if the instruction is a break. */ + if (p->opcode == breakpoint_insn || + p->opcode == breakpoint2_insn) + regs->pc = (unsigned long)p->addr; + else + regs->pc = (unsigned long)&p->ainsn.insn[0]; +} + +static int __kprobes kprobe_handler(struct pt_regs *regs) +{ + struct kprobe *p; + int ret = 0; + kprobe_opcode_t *addr; + struct kprobe_ctlblk *kcb; + + addr = (kprobe_opcode_t *)regs->pc; + + /* + * We don't want to be preempted for the entire + * duration of kprobe processing. + */ + preempt_disable(); + kcb = get_kprobe_ctlblk(); + + /* Check we're not actually recursing. */ + if (kprobe_running()) { + p = get_kprobe(addr); + if (p) { + if (kcb->kprobe_status == KPROBE_HIT_SS && + p->ainsn.insn[0] == breakpoint_insn) { + goto no_kprobe; + } + /* + * We have reentered the kprobe_handler(), since + * another probe was hit while within the handler. + * We here save the original kprobes variables and + * just single step on the instruction of the new probe + * without calling any user handlers. + */ + save_previous_kprobe(kcb); + set_current_kprobe(p, regs, kcb); + kprobes_inc_nmissed_count(p); + prepare_singlestep(p, regs); + kcb->kprobe_status = KPROBE_REENTER; + return 1; + } else { + if (*addr != breakpoint_insn) { + /* + * The breakpoint instruction was removed by + * another cpu right after we hit, no further + * handling of this interrupt is appropriate. + */ + ret = 1; + goto no_kprobe; + } + p = __this_cpu_read(current_kprobe); + if (p->break_handler && p->break_handler(p, regs)) + goto ss_probe; + } + goto no_kprobe; + } + + p = get_kprobe(addr); + if (!p) { + if (*addr != breakpoint_insn) { + /* + * The breakpoint instruction was removed right + * after we hit it. Another cpu has removed + * either a probepoint or a debugger breakpoint + * at this address. In either case, no further + * handling of this interrupt is appropriate. + */ + ret = 1; + } + /* Not one of ours: let kernel handle it. */ + goto no_kprobe; + } + + set_current_kprobe(p, regs, kcb); + kcb->kprobe_status = KPROBE_HIT_ACTIVE; + + if (p->pre_handler && p->pre_handler(p, regs)) { + /* Handler has already set things up, so skip ss setup. */ + return 1; + } + +ss_probe: + prepare_singlestep(p, regs); + kcb->kprobe_status = KPROBE_HIT_SS; + return 1; + +no_kprobe: + preempt_enable_no_resched(); + return ret; +} + +/* + * Called after single-stepping. p->addr is the address of the + * instruction that has been replaced by the breakpoint. To avoid the + * SMP problems that can occur when we temporarily put back the + * original opcode to single-step, we single-stepped a copy of the + * instruction. The address of this copy is p->ainsn.insn. + * + * This function prepares to return from the post-single-step + * breakpoint trap. + */ +static void __kprobes resume_execution(struct kprobe *p, + struct pt_regs *regs, + struct kprobe_ctlblk *kcb) +{ + unsigned long orig_pc = kcb->kprobe_saved_pc; + regs->pc = orig_pc + 8; +} + +static inline int post_kprobe_handler(struct pt_regs *regs) +{ + struct kprobe *cur = kprobe_running(); + struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + + if (!cur) + return 0; + + if ((kcb->kprobe_status != KPROBE_REENTER) && cur->post_handler) { + kcb->kprobe_status = KPROBE_HIT_SSDONE; + cur->post_handler(cur, regs, 0); + } + + resume_execution(cur, regs, kcb); + + /* Restore back the original saved kprobes variables and continue. */ + if (kcb->kprobe_status == KPROBE_REENTER) { + restore_previous_kprobe(kcb); + goto out; + } + reset_current_kprobe(); +out: + preempt_enable_no_resched(); + + return 1; +} + +static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr) +{ + struct kprobe *cur = kprobe_running(); + struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + + if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr)) + return 1; + + if (kcb->kprobe_status & KPROBE_HIT_SS) { + /* + * We are here because the instruction being single + * stepped caused a page fault. We reset the current + * kprobe and the ip points back to the probe address + * and allow the page fault handler to continue as a + * normal page fault. + */ + resume_execution(cur, regs, kcb); + reset_current_kprobe(); + preempt_enable_no_resched(); + } + return 0; +} + +/* + * Wrapper routine for handling exceptions. + */ +int __kprobes kprobe_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data) +{ + struct die_args *args = (struct die_args *)data; + int ret = NOTIFY_DONE; + + switch (val) { + case DIE_BREAK: + if (kprobe_handler(args->regs)) + ret = NOTIFY_STOP; + break; + case DIE_SSTEPBP: + if (post_kprobe_handler(args->regs)) + ret = NOTIFY_STOP; + break; + case DIE_PAGE_FAULT: + /* kprobe_running() needs smp_processor_id(). */ + preempt_disable(); + + if (kprobe_running() + && kprobe_fault_handler(args->regs, args->trapnr)) + ret = NOTIFY_STOP; + preempt_enable(); + break; + default: + break; + } + return ret; +} + +int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs) +{ + struct jprobe *jp = container_of(p, struct jprobe, kp); + struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + + kcb->jprobe_saved_regs = *regs; + kcb->jprobe_saved_sp = regs->sp; + + memcpy(kcb->jprobes_stack, (void *)kcb->jprobe_saved_sp, + MIN_JPROBES_STACK_SIZE(kcb->jprobe_saved_sp)); + + regs->pc = (unsigned long)(jp->entry); + + return 1; +} + +/* Defined in the inline asm below. */ +void jprobe_return_end(void); + +void __kprobes jprobe_return(void) +{ + asm volatile( + "bpt\n\t" + ".globl jprobe_return_end\n" + "jprobe_return_end:\n"); +} + +int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs) +{ + struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + + if (regs->pc >= (unsigned long)jprobe_return && + regs->pc <= (unsigned long)jprobe_return_end) { + *regs = kcb->jprobe_saved_regs; + memcpy((void *)kcb->jprobe_saved_sp, kcb->jprobes_stack, + MIN_JPROBES_STACK_SIZE(kcb->jprobe_saved_sp)); + preempt_enable_no_resched(); + + return 1; + } + return 0; +} + +/* + * Function return probe trampoline: + * - init_kprobes() establishes a probepoint here + * - When the probed function returns, this probe causes the + * handlers to fire + */ +static void __used kretprobe_trampoline_holder(void) +{ + asm volatile( + "nop\n\t" + ".global kretprobe_trampoline\n" + "kretprobe_trampoline:\n\t" + "nop\n\t" + : : : "memory"); +} + +void kretprobe_trampoline(void); + +void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, + struct pt_regs *regs) +{ + ri->ret_addr = (kprobe_opcode_t *) regs->lr; + + /* Replace the return addr with trampoline addr */ + regs->lr = (unsigned long)kretprobe_trampoline; +} + +/* + * Called when the probe at kretprobe trampoline is hit. + */ +static int __kprobes trampoline_probe_handler(struct kprobe *p, + struct pt_regs *regs) +{ + struct kretprobe_instance *ri = NULL; + struct hlist_head *head, empty_rp; + struct hlist_node *tmp; + unsigned long flags, orig_ret_address = 0; + unsigned long trampoline_address = (unsigned long)kretprobe_trampoline; + + INIT_HLIST_HEAD(&empty_rp); + kretprobe_hash_lock(current, &head, &flags); + + /* + * It is possible to have multiple instances associated with a given + * task either because multiple functions in the call path have + * a return probe installed on them, and/or more than one return + * return probe was registered for a target function. + * + * We can handle this because: + * - instances are always inserted at the head of the list + * - when multiple return probes are registered for the same + * function, the first instance's ret_addr will point to the + * real return address, and all the rest will point to + * kretprobe_trampoline + */ + hlist_for_each_entry_safe(ri, tmp, head, hlist) { + if (ri->task != current) + /* another task is sharing our hash bucket */ + continue; + + if (ri->rp && ri->rp->handler) + ri->rp->handler(ri, regs); + + orig_ret_address = (unsigned long)ri->ret_addr; + recycle_rp_inst(ri, &empty_rp); + + if (orig_ret_address != trampoline_address) { + /* + * This is the real return address. Any other + * instances associated with this task are for + * other calls deeper on the call stack + */ + break; + } + } + + kretprobe_assert(ri, orig_ret_address, trampoline_address); + instruction_pointer(regs) = orig_ret_address; + + reset_current_kprobe(); + kretprobe_hash_unlock(current, &flags); + preempt_enable_no_resched(); + + hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) { + hlist_del(&ri->hlist); + kfree(ri); + } + /* + * By returning a non-zero value, we are telling + * kprobe_handler() that we don't want the post_handler + * to run (and have re-enabled preemption) + */ + return 1; +} + +int __kprobes arch_trampoline_kprobe(struct kprobe *p) +{ + if (p->addr == (kprobe_opcode_t *)kretprobe_trampoline) + return 1; + + return 0; +} + +static struct kprobe trampoline_p = { + .addr = (kprobe_opcode_t *)kretprobe_trampoline, + .pre_handler = trampoline_probe_handler +}; + +int __init arch_init_kprobes(void) +{ + register_kprobe(&trampoline_p); + return 0; +} diff --git a/arch/tile/kernel/mcount_64.S b/arch/tile/kernel/mcount_64.S new file mode 100644 index 0000000..70d7bb0 --- /dev/null +++ b/arch/tile/kernel/mcount_64.S @@ -0,0 +1,224 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * TILE-Gx specific __mcount support + */ + +#include <linux/linkage.h> +#include <asm/ftrace.h> + +#define REGSIZE 8 + + .text + .global __mcount + + .macro MCOUNT_SAVE_REGS + addli sp, sp, -REGSIZE + { + st sp, lr + addli r29, sp, - (12 * REGSIZE) + } + { + addli sp, sp, - (13 * REGSIZE) + st r29, sp + } + addli r29, r29, REGSIZE + { st r29, r0; addli r29, r29, REGSIZE } + { st r29, r1; addli r29, r29, REGSIZE } + { st r29, r2; addli r29, r29, REGSIZE } + { st r29, r3; addli r29, r29, REGSIZE } + { st r29, r4; addli r29, r29, REGSIZE } + { st r29, r5; addli r29, r29, REGSIZE } + { st r29, r6; addli r29, r29, REGSIZE } + { st r29, r7; addli r29, r29, REGSIZE } + { st r29, r8; addli r29, r29, REGSIZE } + { st r29, r9; addli r29, r29, REGSIZE } + { st r29, r10; addli r29, r29, REGSIZE } + .endm + + .macro MCOUNT_RESTORE_REGS + addli r29, sp, (2 * REGSIZE) + { ld r0, r29; addli r29, r29, REGSIZE } + { ld r1, r29; addli r29, r29, REGSIZE } + { ld r2, r29; addli r29, r29, REGSIZE } + { ld r3, r29; addli r29, r29, REGSIZE } + { ld r4, r29; addli r29, r29, REGSIZE } + { ld r5, r29; addli r29, r29, REGSIZE } + { ld r6, r29; addli r29, r29, REGSIZE } + { ld r7, r29; addli r29, r29, REGSIZE } + { ld r8, r29; addli r29, r29, REGSIZE } + { ld r9, r29; addli r29, r29, REGSIZE } + { ld r10, r29; addli lr, sp, (13 * REGSIZE) } + { ld lr, lr; addli sp, sp, (14 * REGSIZE) } + .endm + + .macro RETURN_BACK + { move r12, lr; move lr, r10 } + jrp r12 + .endm + +#ifdef CONFIG_DYNAMIC_FTRACE + + .align 64 +STD_ENTRY(__mcount) +__mcount: + j ftrace_stub +STD_ENDPROC(__mcount) + + .align 64 +STD_ENTRY(ftrace_caller) + moveli r11, hw2_last(function_trace_stop) + { shl16insli r11, r11, hw1(function_trace_stop); move r12, lr } + { shl16insli r11, r11, hw0(function_trace_stop); move lr, r10 } + ld r11, r11 + beqz r11, 1f + jrp r12 + +1: + { move r10, lr; move lr, r12 } + MCOUNT_SAVE_REGS + + /* arg1: self return address */ + /* arg2: parent's return address */ + { move r0, lr; move r1, r10 } + + .global ftrace_call +ftrace_call: + /* + * a placeholder for the call to a real tracing function, i.e. + * ftrace_trace_function() + */ + nop + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + .global ftrace_graph_call +ftrace_graph_call: + /* + * a placeholder for the call to a real tracing function, i.e. + * ftrace_graph_caller() + */ + nop +#endif + MCOUNT_RESTORE_REGS + .global ftrace_stub +ftrace_stub: + RETURN_BACK +STD_ENDPROC(ftrace_caller) + +#else /* ! CONFIG_DYNAMIC_FTRACE */ + + .align 64 +STD_ENTRY(__mcount) + moveli r11, hw2_last(function_trace_stop) + { shl16insli r11, r11, hw1(function_trace_stop); move r12, lr } + { shl16insli r11, r11, hw0(function_trace_stop); move lr, r10 } + ld r11, r11 + beqz r11, 1f + jrp r12 + +1: + { move r10, lr; move lr, r12 } + { + moveli r11, hw2_last(ftrace_trace_function) + moveli r13, hw2_last(ftrace_stub) + } + { + shl16insli r11, r11, hw1(ftrace_trace_function) + shl16insli r13, r13, hw1(ftrace_stub) + } + { + shl16insli r11, r11, hw0(ftrace_trace_function) + shl16insli r13, r13, hw0(ftrace_stub) + } + + ld r11, r11 + sub r14, r13, r11 + bnez r14, static_trace + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + moveli r15, hw2_last(ftrace_graph_return) + shl16insli r15, r15, hw1(ftrace_graph_return) + shl16insli r15, r15, hw0(ftrace_graph_return) + ld r15, r15 + sub r15, r15, r13 + bnez r15, ftrace_graph_caller + + { + moveli r16, hw2_last(ftrace_graph_entry) + moveli r17, hw2_last(ftrace_graph_entry_stub) + } + { + shl16insli r16, r16, hw1(ftrace_graph_entry) + shl16insli r17, r17, hw1(ftrace_graph_entry_stub) + } + { + shl16insli r16, r16, hw0(ftrace_graph_entry) + shl16insli r17, r17, hw0(ftrace_graph_entry_stub) + } + ld r16, r16 + sub r17, r16, r17 + bnez r17, ftrace_graph_caller + +#endif + RETURN_BACK + +static_trace: + MCOUNT_SAVE_REGS + + /* arg1: self return address */ + /* arg2: parent's return address */ + { move r0, lr; move r1, r10 } + + /* call ftrace_trace_function() */ + jalr r11 + + MCOUNT_RESTORE_REGS + + .global ftrace_stub +ftrace_stub: + RETURN_BACK +STD_ENDPROC(__mcount) + +#endif /* ! CONFIG_DYNAMIC_FTRACE */ + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + +STD_ENTRY(ftrace_graph_caller) +ftrace_graph_caller: +#ifndef CONFIG_DYNAMIC_FTRACE + MCOUNT_SAVE_REGS +#endif + + /* arg1: Get the location of the parent's return address */ + addi r0, sp, 12 * REGSIZE + /* arg2: Get self return address */ + move r1, lr + + jal prepare_ftrace_return + + MCOUNT_RESTORE_REGS + RETURN_BACK +STD_ENDPROC(ftrace_graph_caller) + + .global return_to_handler +return_to_handler: + MCOUNT_SAVE_REGS + + jal ftrace_return_to_handler + /* restore the real parent address */ + move r11, r0 + + MCOUNT_RESTORE_REGS + jr r11 + +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ diff --git a/arch/tile/kernel/pci-dma.c b/arch/tile/kernel/pci-dma.c index b9fe80e..09b5870 100644 --- a/arch/tile/kernel/pci-dma.c +++ b/arch/tile/kernel/pci-dma.c @@ -36,8 +36,9 @@ static void *tile_dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs) { - u64 dma_mask = dev->coherent_dma_mask ?: DMA_BIT_MASK(32); - int node = dev_to_node(dev); + u64 dma_mask = (dev && dev->coherent_dma_mask) ? + dev->coherent_dma_mask : DMA_BIT_MASK(32); + int node = dev ? dev_to_node(dev) : 0; int order = get_order(size); struct page *pg; dma_addr_t addr; @@ -256,7 +257,7 @@ static void tile_dma_unmap_page(struct device *dev, dma_addr_t dma_address, BUG_ON(!valid_dma_direction(direction)); __dma_complete_page(pfn_to_page(PFN_DOWN(dma_address)), - dma_address & PAGE_OFFSET, size, direction); + dma_address & (PAGE_SIZE - 1), size, direction); } static void tile_dma_sync_single_for_cpu(struct device *dev, @@ -357,7 +358,7 @@ static void *tile_pci_dma_alloc_coherent(struct device *dev, size_t size, addr = page_to_phys(pg); - *dma_handle = phys_to_dma(dev, addr); + *dma_handle = addr + get_dma_offset(dev); return page_address(pg); } @@ -387,7 +388,7 @@ static int tile_pci_dma_map_sg(struct device *dev, struct scatterlist *sglist, sg->dma_address = sg_phys(sg); __dma_prep_pa_range(sg->dma_address, sg->length, direction); - sg->dma_address = phys_to_dma(dev, sg->dma_address); + sg->dma_address = sg->dma_address + get_dma_offset(dev); #ifdef CONFIG_NEED_SG_DMA_LENGTH sg->dma_length = sg->length; #endif @@ -422,7 +423,7 @@ static dma_addr_t tile_pci_dma_map_page(struct device *dev, struct page *page, BUG_ON(offset + size > PAGE_SIZE); __dma_prep_page(page, offset, size, direction); - return phys_to_dma(dev, page_to_pa(page) + offset); + return page_to_pa(page) + offset + get_dma_offset(dev); } static void tile_pci_dma_unmap_page(struct device *dev, dma_addr_t dma_address, @@ -432,10 +433,10 @@ static void tile_pci_dma_unmap_page(struct device *dev, dma_addr_t dma_address, { BUG_ON(!valid_dma_direction(direction)); - dma_address = dma_to_phys(dev, dma_address); + dma_address -= get_dma_offset(dev); __dma_complete_page(pfn_to_page(PFN_DOWN(dma_address)), - dma_address & PAGE_OFFSET, size, direction); + dma_address & (PAGE_SIZE - 1), size, direction); } static void tile_pci_dma_sync_single_for_cpu(struct device *dev, @@ -445,7 +446,7 @@ static void tile_pci_dma_sync_single_for_cpu(struct device *dev, { BUG_ON(!valid_dma_direction(direction)); - dma_handle = dma_to_phys(dev, dma_handle); + dma_handle -= get_dma_offset(dev); __dma_complete_pa_range(dma_handle, size, direction); } @@ -456,7 +457,7 @@ static void tile_pci_dma_sync_single_for_device(struct device *dev, enum dma_data_direction direction) { - dma_handle = dma_to_phys(dev, dma_handle); + dma_handle -= get_dma_offset(dev); __dma_prep_pa_range(dma_handle, size, direction); } @@ -558,22 +559,47 @@ static struct dma_map_ops pci_swiotlb_dma_ops = { .mapping_error = swiotlb_dma_mapping_error, }; +static struct dma_map_ops pci_hybrid_dma_ops = { + .alloc = tile_swiotlb_alloc_coherent, + .free = tile_swiotlb_free_coherent, + .map_page = tile_pci_dma_map_page, + .unmap_page = tile_pci_dma_unmap_page, + .map_sg = tile_pci_dma_map_sg, + .unmap_sg = tile_pci_dma_unmap_sg, + .sync_single_for_cpu = tile_pci_dma_sync_single_for_cpu, + .sync_single_for_device = tile_pci_dma_sync_single_for_device, + .sync_sg_for_cpu = tile_pci_dma_sync_sg_for_cpu, + .sync_sg_for_device = tile_pci_dma_sync_sg_for_device, + .mapping_error = tile_pci_dma_mapping_error, + .dma_supported = tile_pci_dma_supported +}; + struct dma_map_ops *gx_legacy_pci_dma_map_ops = &pci_swiotlb_dma_ops; +struct dma_map_ops *gx_hybrid_pci_dma_map_ops = &pci_hybrid_dma_ops; #else struct dma_map_ops *gx_legacy_pci_dma_map_ops; +struct dma_map_ops *gx_hybrid_pci_dma_map_ops; #endif EXPORT_SYMBOL(gx_legacy_pci_dma_map_ops); +EXPORT_SYMBOL(gx_hybrid_pci_dma_map_ops); #ifdef CONFIG_ARCH_HAS_DMA_SET_COHERENT_MASK int dma_set_coherent_mask(struct device *dev, u64 mask) { struct dma_map_ops *dma_ops = get_dma_ops(dev); - /* Handle legacy PCI devices with limited memory addressability. */ - if (((dma_ops == gx_pci_dma_map_ops) || - (dma_ops == gx_legacy_pci_dma_map_ops)) && - (mask <= DMA_BIT_MASK(32))) { - if (mask > dev->archdata.max_direct_dma_addr) + /* + * For PCI devices with 64-bit DMA addressing capability, promote + * the dma_ops to full capability for both streams and consistent + * memory access. For 32-bit capable devices, limit the consistent + * memory DMA range to max_direct_dma_addr. + */ + if (dma_ops == gx_pci_dma_map_ops || + dma_ops == gx_hybrid_pci_dma_map_ops || + dma_ops == gx_legacy_pci_dma_map_ops) { + if (mask == DMA_BIT_MASK(64)) + set_dma_ops(dev, gx_pci_dma_map_ops); + else if (mask > dev->archdata.max_direct_dma_addr) mask = dev->archdata.max_direct_dma_addr; } @@ -584,3 +610,21 @@ int dma_set_coherent_mask(struct device *dev, u64 mask) } EXPORT_SYMBOL(dma_set_coherent_mask); #endif + +#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK +/* + * The generic dma_get_required_mask() uses the highest physical address + * (max_pfn) to provide the hint to the PCI drivers regarding 32-bit or + * 64-bit DMA configuration. Since TILEGx has I/O TLB/MMU, allowing the + * DMAs to use the full 64-bit PCI address space and not limited by + * the physical memory space, we always let the PCI devices use + * 64-bit DMA if they have that capability, by returning the 64-bit + * DMA mask here. The device driver has the option to use 32-bit DMA if + * the device is not capable of 64-bit DMA. + */ +u64 dma_get_required_mask(struct device *dev) +{ + return DMA_BIT_MASK(64); +} +EXPORT_SYMBOL_GPL(dma_get_required_mask); +#endif diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c index 67237d3..b7180e6 100644 --- a/arch/tile/kernel/pci.c +++ b/arch/tile/kernel/pci.c @@ -20,7 +20,6 @@ #include <linux/capability.h> #include <linux/sched.h> #include <linux/errno.h> -#include <linux/bootmem.h> #include <linux/irq.h> #include <linux/io.h> #include <linux/uaccess.h> @@ -52,6 +51,8 @@ * */ +static int pci_probe = 1; + /* * This flag tells if the platform is TILEmpower that needs * special configuration for the PLX switch chip. @@ -144,6 +145,11 @@ int __init tile_pci_init(void) { int i; + if (!pci_probe) { + pr_info("PCI: disabled by boot argument\n"); + return 0; + } + pr_info("PCI: Searching for controllers...\n"); /* Re-init number of PCIe controllers to support hot-plug feature. */ @@ -192,7 +198,6 @@ int __init tile_pci_init(void) controller->hv_cfg_fd[0] = hv_cfg_fd0; controller->hv_cfg_fd[1] = hv_cfg_fd1; controller->hv_mem_fd = hv_mem_fd; - controller->first_busno = 0; controller->last_busno = 0xff; controller->ops = &tile_cfg_ops; @@ -283,7 +288,7 @@ int __init pcibios_init(void) * known to require at least 20ms here, but we use a more * conservative value. */ - mdelay(250); + msleep(250); /* Scan all of the recorded PCI controllers. */ for (i = 0; i < TILE_NUM_PCIE; i++) { @@ -304,18 +309,10 @@ int __init pcibios_init(void) pr_info("PCI: initializing controller #%d\n", i); - /* - * This comes from the generic Linux PCI driver. - * - * It reads the PCI tree for this bus into the Linux - * data structures. - * - * This is inlined in linux/pci.h and calls into - * pci_scan_bus_parented() in probe.c. - */ pci_add_resource(&resources, &ioport_resource); pci_add_resource(&resources, &iomem_resource); - bus = pci_scan_root_bus(NULL, 0, controller->ops, controller, &resources); + bus = pci_scan_root_bus(NULL, 0, controller->ops, + controller, &resources); controller->root_bus = bus; controller->last_busno = bus->busn_res.end; } @@ -388,6 +385,16 @@ void pcibios_set_master(struct pci_dev *dev) /* No special bus mastering setup handling. */ } +/* Process any "pci=" kernel boot arguments. */ +char *__init pcibios_setup(char *str) +{ + if (!strcmp(str, "off")) { + pci_probe = 0; + return NULL; + } + return str; +} + /* * Enable memory and/or address decoding, as appropriate, for the * device described by the 'dev' struct. diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c index 6640e7b..a97a645 100644 --- a/arch/tile/kernel/pci_gx.c +++ b/arch/tile/kernel/pci_gx.c @@ -69,19 +69,32 @@ static int pcie_rc[TILEGX_NUM_TRIO][TILEGX_TRIO_PCIES]; * a HW PCIe link-training bug. The exact delay is specified with * a kernel boot argument in the form of "pcie_rc_delay=T,P,S", * where T is the TRIO instance number, P is the port number and S is - * the delay in seconds. If the delay is not provided, the value - * will be DEFAULT_RC_DELAY. + * the delay in seconds. If the argument is specified, but the delay is + * not provided, the value will be DEFAULT_RC_DELAY. */ static int rc_delay[TILEGX_NUM_TRIO][TILEGX_TRIO_PCIES]; /* Default number of seconds that the PCIe RC port probe can be delayed. */ #define DEFAULT_RC_DELAY 10 -/* Max number of seconds that the PCIe RC port probe can be delayed. */ -#define MAX_RC_DELAY 20 +/* The PCI I/O space size in each PCI domain. */ +#define IO_SPACE_SIZE 0x10000 + +/* Provide shorter versions of some very long constant names. */ +#define AUTO_CONFIG_RC \ + TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_RC +#define AUTO_CONFIG_RC_G1 \ + TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_RC_G1 +#define AUTO_CONFIG_EP \ + TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_ENDPOINT +#define AUTO_CONFIG_EP_G1 \ + TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_ENDPOINT_G1 /* Array of the PCIe ports configuration info obtained from the BIB. */ -struct pcie_port_property pcie_ports[TILEGX_NUM_TRIO][TILEGX_TRIO_PCIES]; +struct pcie_trio_ports_property pcie_ports[TILEGX_NUM_TRIO]; + +/* Number of configured TRIO instances. */ +int num_trio_shims; /* All drivers share the TRIO contexts defined here. */ gxio_trio_context_t trio_contexts[TILEGX_NUM_TRIO]; @@ -89,24 +102,21 @@ gxio_trio_context_t trio_contexts[TILEGX_NUM_TRIO]; /* Pointer to an array of PCIe RC controllers. */ struct pci_controller pci_controllers[TILEGX_NUM_TRIO * TILEGX_TRIO_PCIES]; int num_rc_controllers; -static int num_ep_controllers; static struct pci_ops tile_cfg_ops; /* Mask of CPUs that should receive PCIe interrupts. */ static struct cpumask intr_cpus_map; -/* - * We don't need to worry about the alignment of resources. - */ +/* We don't need to worry about the alignment of resources. */ resource_size_t pcibios_align_resource(void *data, const struct resource *res, - resource_size_t size, resource_size_t align) + resource_size_t size, + resource_size_t align) { return res->start; } EXPORT_SYMBOL(pcibios_align_resource); - /* * Pick a CPU to receive and handle the PCIe interrupts, based on the IRQ #. * For now, we simply send interrupts to non-dataplane CPUs. @@ -134,24 +144,19 @@ static int tile_irq_cpu(int irq) return cpu; } -/* - * Open a file descriptor to the TRIO shim. - */ +/* Open a file descriptor to the TRIO shim. */ static int tile_pcie_open(int trio_index) { gxio_trio_context_t *context = &trio_contexts[trio_index]; int ret; + int mac; - /* - * This opens a file descriptor to the TRIO shim. - */ + /* This opens a file descriptor to the TRIO shim. */ ret = gxio_trio_init(context, trio_index); if (ret < 0) - return ret; + goto gxio_trio_init_failure; - /* - * Allocate an ASID for the kernel. - */ + /* Allocate an ASID for the kernel. */ ret = gxio_trio_alloc_asids(context, 1, 0, 0); if (ret < 0) { pr_err("PCI: ASID alloc failure on TRIO %d, give up\n", @@ -189,31 +194,97 @@ static int tile_pcie_open(int trio_index) } #endif + /* Get the properties of the PCIe ports on this TRIO instance. */ + ret = gxio_trio_get_port_property(context, &pcie_ports[trio_index]); + if (ret < 0) { + pr_err("PCI: PCIE_GET_PORT_PROPERTY failure, error %d," + " on TRIO %d\n", ret, trio_index); + goto get_port_property_failure; + } + + context->mmio_base_mac = + iorpc_ioremap(context->fd, 0, HV_TRIO_CONFIG_IOREMAP_SIZE); + if (context->mmio_base_mac == NULL) { + pr_err("PCI: TRIO config space mapping failure, error %d," + " on TRIO %d\n", ret, trio_index); + ret = -ENOMEM; + + goto trio_mmio_mapping_failure; + } + + /* Check the port strap state which will override the BIB setting. */ + for (mac = 0; mac < TILEGX_TRIO_PCIES; mac++) { + TRIO_PCIE_INTFC_PORT_CONFIG_t port_config; + unsigned int reg_offset; + + /* Ignore ports that are not specified in the BIB. */ + if (!pcie_ports[trio_index].ports[mac].allow_rc && + !pcie_ports[trio_index].ports[mac].allow_ep) + continue; + + reg_offset = + (TRIO_PCIE_INTFC_PORT_CONFIG << + TRIO_CFG_REGION_ADDR__REG_SHIFT) | + (TRIO_CFG_REGION_ADDR__INTFC_VAL_MAC_INTERFACE << + TRIO_CFG_REGION_ADDR__INTFC_SHIFT) | + (mac << TRIO_CFG_REGION_ADDR__MAC_SEL_SHIFT); + + port_config.word = + __gxio_mmio_read(context->mmio_base_mac + reg_offset); + + if (port_config.strap_state != AUTO_CONFIG_RC && + port_config.strap_state != AUTO_CONFIG_RC_G1) { + /* + * If this is really intended to be an EP port, record + * it so that the endpoint driver will know about it. + */ + if (port_config.strap_state == AUTO_CONFIG_EP || + port_config.strap_state == AUTO_CONFIG_EP_G1) + pcie_ports[trio_index].ports[mac].allow_ep = 1; + } + } + return ret; +trio_mmio_mapping_failure: +get_port_property_failure: asid_alloc_failure: #ifdef USE_SHARED_PCIE_CONFIG_REGION pio_alloc_failure: #endif hv_dev_close(context->fd); +gxio_trio_init_failure: + context->fd = -1; return ret; } -static void -tilegx_legacy_irq_ack(struct irq_data *d) +static int __init tile_trio_init(void) +{ + int i; + + /* We loop over all the TRIO shims. */ + for (i = 0; i < TILEGX_NUM_TRIO; i++) { + if (tile_pcie_open(i) < 0) + continue; + num_trio_shims++; + } + + return 0; +} +postcore_initcall(tile_trio_init); + +static void tilegx_legacy_irq_ack(struct irq_data *d) { __insn_mtspr(SPR_IPI_EVENT_RESET_K, 1UL << d->irq); } -static void -tilegx_legacy_irq_mask(struct irq_data *d) +static void tilegx_legacy_irq_mask(struct irq_data *d) { __insn_mtspr(SPR_IPI_MASK_SET_K, 1UL << d->irq); } -static void -tilegx_legacy_irq_unmask(struct irq_data *d) +static void tilegx_legacy_irq_unmask(struct irq_data *d) { __insn_mtspr(SPR_IPI_MASK_RESET_K, 1UL << d->irq); } @@ -234,8 +305,7 @@ static struct irq_chip tilegx_legacy_irq_chip = { * to Linux which just calls handle_level_irq() after clearing the * MAC INTx Assert status bit associated with this interrupt. */ -static void -trio_handle_level_irq(unsigned int irq, struct irq_desc *desc) +static void trio_handle_level_irq(unsigned int irq, struct irq_desc *desc) { struct pci_controller *controller = irq_desc_get_handler_data(desc); gxio_trio_context_t *trio_context = controller->trio; @@ -301,9 +371,7 @@ static int tile_init_irqs(struct pci_controller *controller) goto free_irqs; } - /* - * Register the IRQ handler with the kernel. - */ + /* Register the IRQ handler with the kernel. */ irq_set_chip_and_handler(irq, &tilegx_legacy_irq_chip, trio_handle_level_irq); irq_set_chip_data(irq, (void *)(uint64_t)i); @@ -320,14 +388,39 @@ free_irqs: } /* + * Return 1 if the port is strapped to operate in RC mode. + */ +static int +strapped_for_rc(gxio_trio_context_t *trio_context, int mac) +{ + TRIO_PCIE_INTFC_PORT_CONFIG_t port_config; + unsigned int reg_offset; + + /* Check the port configuration. */ + reg_offset = + (TRIO_PCIE_INTFC_PORT_CONFIG << + TRIO_CFG_REGION_ADDR__REG_SHIFT) | + (TRIO_CFG_REGION_ADDR__INTFC_VAL_MAC_INTERFACE << + TRIO_CFG_REGION_ADDR__INTFC_SHIFT) | + (mac << TRIO_CFG_REGION_ADDR__MAC_SEL_SHIFT); + port_config.word = + __gxio_mmio_read(trio_context->mmio_base_mac + reg_offset); + + if (port_config.strap_state == AUTO_CONFIG_RC || + port_config.strap_state == AUTO_CONFIG_RC_G1) + return 1; + else + return 0; +} + +/* * Find valid controllers and fill in pci_controller structs for each * of them. * - * Returns the number of controllers discovered. + * Return the number of controllers discovered. */ int __init tile_pci_init(void) { - int num_trio_shims = 0; int ctl_index = 0; int i, j; @@ -338,64 +431,62 @@ int __init tile_pci_init(void) pr_info("PCI: Searching for controllers...\n"); - /* - * We loop over all the TRIO shims. - */ - for (i = 0; i < TILEGX_NUM_TRIO; i++) { - int ret; - - ret = tile_pcie_open(i); - if (ret < 0) - continue; - - num_trio_shims++; - } - if (num_trio_shims == 0 || sim_is_simulator()) return 0; /* - * Now determine which PCIe ports are configured to operate in RC mode. - * We look at the Board Information Block first and then see if there - * are any overriding configuration by the HW strapping pin. + * Now determine which PCIe ports are configured to operate in RC + * mode. There is a differece in the port configuration capability + * between the Gx36 and Gx72 devices. + * + * The Gx36 has configuration capability for each of the 3 PCIe + * interfaces (disable, auto endpoint, auto RC, etc.). + * On the Gx72, you can only select one of the 3 PCIe interfaces per + * TRIO to train automatically. Further, the allowable training modes + * are reduced to four options (auto endpoint, auto RC, stream x1, + * stream x4). + * + * For Gx36 ports, it must be allowed to be in RC mode by the + * Board Information Block, and the hardware strapping pins must be + * set to RC mode. + * + * For Gx72 ports, the port will operate in RC mode if either of the + * following is true: + * 1. It is allowed to be in RC mode by the Board Information Block, + * and the BIB doesn't allow the EP mode. + * 2. It is allowed to be in either the RC or the EP mode by the BIB, + * and the hardware strapping pin is set to RC mode. */ for (i = 0; i < TILEGX_NUM_TRIO; i++) { gxio_trio_context_t *context = &trio_contexts[i]; - int ret; if (context->fd < 0) continue; - ret = hv_dev_pread(context->fd, 0, - (HV_VirtAddr)&pcie_ports[i][0], - sizeof(struct pcie_port_property) * TILEGX_TRIO_PCIES, - GXIO_TRIO_OP_GET_PORT_PROPERTY); - if (ret < 0) { - pr_err("PCI: PCIE_GET_PORT_PROPERTY failure, error %d," - " on TRIO %d\n", ret, i); - continue; - } - for (j = 0; j < TILEGX_TRIO_PCIES; j++) { - if (pcie_ports[i][j].allow_rc) { + int is_rc = 0; + + if (pcie_ports[i].is_gx72 && + pcie_ports[i].ports[j].allow_rc) { + if (!pcie_ports[i].ports[j].allow_ep || + strapped_for_rc(context, j)) + is_rc = 1; + } else if (pcie_ports[i].ports[j].allow_rc && + strapped_for_rc(context, j)) { + is_rc = 1; + } + if (is_rc) { pcie_rc[i][j] = 1; num_rc_controllers++; } - else if (pcie_ports[i][j].allow_ep) { - num_ep_controllers++; - } } } - /* - * Return if no PCIe ports are configured to operate in RC mode. - */ + /* Return if no PCIe ports are configured to operate in RC mode. */ if (num_rc_controllers == 0) return 0; - /* - * Set the TRIO pointer and MAC index for each PCIe RC port. - */ + /* Set the TRIO pointer and MAC index for each PCIe RC port. */ for (i = 0; i < TILEGX_NUM_TRIO; i++) { for (j = 0; j < TILEGX_TRIO_PCIES; j++) { if (pcie_rc[i][j]) { @@ -411,26 +502,32 @@ int __init tile_pci_init(void) } out: - /* - * Configure each PCIe RC port. - */ + /* Configure each PCIe RC port. */ for (i = 0; i < num_rc_controllers; i++) { - /* - * Configure the PCIe MAC to run in RC mode. - */ + /* Configure the PCIe MAC to run in RC mode. */ struct pci_controller *controller = &pci_controllers[i]; controller->index = i; controller->ops = &tile_cfg_ops; + controller->io_space.start = PCIBIOS_MIN_IO + + (i * IO_SPACE_SIZE); + controller->io_space.end = controller->io_space.start + + IO_SPACE_SIZE - 1; + BUG_ON(controller->io_space.end > IO_SPACE_LIMIT); + controller->io_space.flags = IORESOURCE_IO; + snprintf(controller->io_space_name, + sizeof(controller->io_space_name), + "PCI I/O domain %d", i); + controller->io_space.name = controller->io_space_name; + /* * The PCI memory resource is located above the PA space. * For every host bridge, the BAR window or the MMIO aperture * is in range [3GB, 4GB - 1] of a 4GB space beyond the * PA space. */ - controller->mem_offset = TILE_PCI_MEM_START + (i * TILE_PCI_BAR_WINDOW_TOP); controller->mem_space.start = controller->mem_offset + @@ -458,7 +555,6 @@ static int tile_map_irq(const struct pci_dev *dev, u8 device, u8 pin) return controller->irq_intx_table[pin - 1]; } - static void fixup_read_and_payload_sizes(struct pci_controller *controller) { gxio_trio_context_t *trio_context = controller->trio; @@ -472,9 +568,7 @@ static void fixup_read_and_payload_sizes(struct pci_controller *controller) mac = controller->mac; - /* - * Set our max read request size to be 4KB. - */ + /* Set our max read request size to be 4KB. */ reg_offset = (TRIO_PCIE_RC_DEVICE_CONTROL << TRIO_CFG_REGION_ADDR__REG_SHIFT) | @@ -483,10 +577,10 @@ static void fixup_read_and_payload_sizes(struct pci_controller *controller) (mac << TRIO_CFG_REGION_ADDR__MAC_SEL_SHIFT); dev_control.word = __gxio_mmio_read32(trio_context->mmio_base_mac + - reg_offset); + reg_offset); dev_control.max_read_req_sz = 5; __gxio_mmio_write32(trio_context->mmio_base_mac + reg_offset, - dev_control.word); + dev_control.word); /* * Set the max payload size supported by this Gx PCIe MAC. @@ -502,10 +596,10 @@ static void fixup_read_and_payload_sizes(struct pci_controller *controller) (mac << TRIO_CFG_REGION_ADDR__MAC_SEL_SHIFT); rc_dev_cap.word = __gxio_mmio_read32(trio_context->mmio_base_mac + - reg_offset); + reg_offset); rc_dev_cap.mps_sup = 1; __gxio_mmio_write32(trio_context->mmio_base_mac + reg_offset, - rc_dev_cap.word); + rc_dev_cap.word); /* Configure PCI Express MPS setting. */ list_for_each_entry(child, &root_bus->children, node) @@ -528,7 +622,7 @@ static void fixup_read_and_payload_sizes(struct pci_controller *controller) dev_control.max_payload_size, dev_control.max_read_req_sz, mac); - if (err < 0) { + if (err < 0) { pr_err("PCI: PCIE_CONFIGURE_MAC_MPS_MRS failure, " "MAC %d on TRIO %d\n", mac, controller->trio_index); @@ -565,21 +659,14 @@ static int setup_pcie_rc_delay(char *str) if (!isdigit(*str)) return -EINVAL; delay = simple_strtoul(str, (char **)&str, 10); - if (delay > MAX_RC_DELAY) - return -EINVAL; } rc_delay[trio_index][mac] = delay ? : DEFAULT_RC_DELAY; - pr_info("Delaying PCIe RC link training for %u sec" - " on MAC %lu on TRIO %lu\n", rc_delay[trio_index][mac], - mac, trio_index); return 0; } early_param("pcie_rc_delay", setup_pcie_rc_delay); -/* - * PCI initialization entry point, called by subsys_initcall. - */ +/* PCI initialization entry point, called by subsys_initcall. */ int __init pcibios_init(void) { resource_size_t offset; @@ -589,35 +676,10 @@ int __init pcibios_init(void) tile_pci_init(); - if (num_rc_controllers == 0 && num_ep_controllers == 0) + if (num_rc_controllers == 0) return 0; /* - * We loop over all the TRIO shims and set up the MMIO mappings. - */ - for (i = 0; i < TILEGX_NUM_TRIO; i++) { - gxio_trio_context_t *context = &trio_contexts[i]; - - if (context->fd < 0) - continue; - - /* - * Map in the MMIO space for the MAC. - */ - offset = 0; - context->mmio_base_mac = - iorpc_ioremap(context->fd, offset, - HV_TRIO_CONFIG_IOREMAP_SIZE); - if (context->mmio_base_mac == NULL) { - pr_err("PCI: MAC map failure on TRIO %d\n", i); - - hv_dev_close(context->fd); - context->fd = -1; - continue; - } - } - - /* * Delay a bit in case devices aren't ready. Some devices are * known to require at least 20ms here, but we use a more * conservative value. @@ -628,7 +690,6 @@ int __init pcibios_init(void) for (next_busno = 0, i = 0; i < num_rc_controllers; i++) { struct pci_controller *controller = &pci_controllers[i]; gxio_trio_context_t *trio_context = controller->trio; - TRIO_PCIE_INTFC_PORT_CONFIG_t port_config; TRIO_PCIE_INTFC_PORT_STATUS_t port_status; TRIO_PCIE_INTFC_TX_FIFO_CTL_t tx_fifo_ctl; struct pci_bus *bus; @@ -645,75 +706,64 @@ int __init pcibios_init(void) mac = controller->mac; /* - * Check the port strap state which will override the BIB - * setting. + * Check for PCIe link-up status to decide if we need + * to force the link to come up. */ - reg_offset = - (TRIO_PCIE_INTFC_PORT_CONFIG << + (TRIO_PCIE_INTFC_PORT_STATUS << TRIO_CFG_REGION_ADDR__REG_SHIFT) | (TRIO_CFG_REGION_ADDR__INTFC_VAL_MAC_INTERFACE << - TRIO_CFG_REGION_ADDR__INTFC_SHIFT ) | + TRIO_CFG_REGION_ADDR__INTFC_SHIFT) | (mac << TRIO_CFG_REGION_ADDR__MAC_SEL_SHIFT); - port_config.word = + port_status.word = __gxio_mmio_read(trio_context->mmio_base_mac + reg_offset); - - if ((port_config.strap_state != - TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_RC) && - (port_config.strap_state != - TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_RC_G1)) { - /* - * If this is really intended to be an EP port, - * record it so that the endpoint driver will know about it. - */ - if (port_config.strap_state == - TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_ENDPOINT || - port_config.strap_state == - TRIO_PCIE_INTFC_PORT_CONFIG__STRAP_STATE_VAL_AUTO_CONFIG_ENDPOINT_G1) - pcie_ports[trio_index][mac].allow_ep = 1; - - continue; + if (!port_status.dl_up) { + if (rc_delay[trio_index][mac]) { + pr_info("Delaying PCIe RC TRIO init %d sec" + " on MAC %d on TRIO %d\n", + rc_delay[trio_index][mac], mac, + trio_index); + msleep(rc_delay[trio_index][mac] * 1000); + } + ret = gxio_trio_force_rc_link_up(trio_context, mac); + if (ret < 0) + pr_err("PCI: PCIE_FORCE_LINK_UP failure, " + "MAC %d on TRIO %d\n", mac, trio_index); } - /* - * Delay the RC link training if needed. - */ - if (rc_delay[trio_index][mac]) - msleep(rc_delay[trio_index][mac] * 1000); - - ret = gxio_trio_force_rc_link_up(trio_context, mac); - if (ret < 0) - pr_err("PCI: PCIE_FORCE_LINK_UP failure, " - "MAC %d on TRIO %d\n", mac, trio_index); - pr_info("PCI: Found PCI controller #%d on TRIO %d MAC %d\n", i, trio_index, controller->mac); - /* - * Wait a bit here because some EP devices take longer - * to come up. - */ - msleep(1000); - - /* - * Check for PCIe link-up status. - */ - - reg_offset = - (TRIO_PCIE_INTFC_PORT_STATUS << - TRIO_CFG_REGION_ADDR__REG_SHIFT) | - (TRIO_CFG_REGION_ADDR__INTFC_VAL_MAC_INTERFACE << - TRIO_CFG_REGION_ADDR__INTFC_SHIFT ) | - (mac << TRIO_CFG_REGION_ADDR__MAC_SEL_SHIFT); + /* Delay the bus probe if needed. */ + if (rc_delay[trio_index][mac]) { + pr_info("Delaying PCIe RC bus enumerating %d sec" + " on MAC %d on TRIO %d\n", + rc_delay[trio_index][mac], mac, + trio_index); + msleep(rc_delay[trio_index][mac] * 1000); + } else { + /* + * Wait a bit here because some EP devices + * take longer to come up. + */ + msleep(1000); + } + /* Check for PCIe link-up status again. */ port_status.word = __gxio_mmio_read(trio_context->mmio_base_mac + reg_offset); if (!port_status.dl_up) { - pr_err("PCI: link is down, MAC %d on TRIO %d\n", - mac, trio_index); + if (pcie_ports[trio_index].ports[mac].removable) { + pr_info("PCI: link is down, MAC %d on TRIO %d\n", + mac, trio_index); + pr_info("This is expected if no PCIe card" + " is connected to this link\n"); + } else + pr_err("PCI: link is down, MAC %d on TRIO %d\n", + mac, trio_index); continue; } @@ -739,7 +789,6 @@ int __init pcibios_init(void) * Change the device ID so that Linux bus crawl doesn't confuse * the internal bridge with any Tilera endpoints. */ - reg_offset = (TRIO_PCIE_RC_DEVICE_ID_VEN_ID << TRIO_CFG_REGION_ADDR__REG_SHIFT) | @@ -752,10 +801,7 @@ int __init pcibios_init(void) TRIO_PCIE_RC_DEVICE_ID_VEN_ID__DEV_ID_SHIFT) | TILERA_VENDOR_ID); - /* - * Set the internal P2P bridge class code. - */ - + /* Set the internal P2P bridge class code. */ reg_offset = (TRIO_PCIE_RC_REVISION_ID << TRIO_CFG_REGION_ADDR__REG_SHIFT) | @@ -766,26 +812,22 @@ int __init pcibios_init(void) class_code_revision = __gxio_mmio_read32(trio_context->mmio_base_mac + reg_offset); - class_code_revision = (class_code_revision & 0xff ) | - (PCI_CLASS_BRIDGE_PCI << 16); + class_code_revision = (class_code_revision & 0xff) | + (PCI_CLASS_BRIDGE_PCI << 16); __gxio_mmio_write32(trio_context->mmio_base_mac + reg_offset, class_code_revision); #ifdef USE_SHARED_PCIE_CONFIG_REGION - /* - * Map in the MMIO space for the PIO region. - */ + /* Map in the MMIO space for the PIO region. */ offset = HV_TRIO_PIO_OFFSET(trio_context->pio_cfg_index) | (((unsigned long long)mac) << TRIO_TILE_PIO_REGION_SETUP_CFG_ADDR__MAC_SHIFT); #else - /* - * Alloc a PIO region for PCI config access per MAC. - */ + /* Alloc a PIO region for PCI config access per MAC. */ ret = gxio_trio_alloc_pio_regions(trio_context, 1, 0, 0); if (ret < 0) { pr_err("PCI: PCI CFG PIO alloc failure for mac %d " @@ -796,9 +838,7 @@ int __init pcibios_init(void) trio_context->pio_cfg_index[mac] = ret; - /* - * For PIO CFG, the bus_address_hi parameter is 0. - */ + /* For PIO CFG, the bus_address_hi parameter is 0. */ ret = gxio_trio_init_pio_region_aux(trio_context, trio_context->pio_cfg_index[mac], mac, 0, HV_TRIO_PIO_FLAG_CONFIG_SPACE); @@ -815,9 +855,15 @@ int __init pcibios_init(void) #endif + /* + * To save VMALLOC space, we take advantage of the fact that + * bit 29 in the PIO CFG address format is reserved 0. With + * TRIO_TILE_PIO_REGION_SETUP_CFG_ADDR__MAC_SHIFT being 30, + * this cuts VMALLOC space usage from 1GB to 512MB per mac. + */ trio_context->mmio_base_pio_cfg[mac] = - iorpc_ioremap(trio_context->fd, offset, - (1 << TRIO_TILE_PIO_REGION_SETUP_CFG_ADDR__MAC_SHIFT)); + iorpc_ioremap(trio_context->fd, offset, (1UL << + (TRIO_TILE_PIO_REGION_SETUP_CFG_ADDR__MAC_SHIFT - 1))); if (trio_context->mmio_base_pio_cfg[mac] == NULL) { pr_err("PCI: PIO map failure for mac %d on TRIO %d\n", mac, trio_index); @@ -825,9 +871,7 @@ int __init pcibios_init(void) continue; } - /* - * Initialize the PCIe interrupts. - */ + /* Initialize the PCIe interrupts. */ if (tile_init_irqs(controller)) { pr_err("PCI: IRQs init failure for mac %d on TRIO %d\n", mac, trio_index); @@ -838,17 +882,16 @@ int __init pcibios_init(void) /* * The PCI memory resource is located above the PA space. * The memory range for the PCI root bus should not overlap - * with the physical RAM + * with the physical RAM. */ pci_add_resource_offset(&resources, &controller->mem_space, controller->mem_offset); - + pci_add_resource(&resources, &controller->io_space); controller->first_busno = next_busno; bus = pci_scan_root_bus(NULL, next_busno, controller->ops, controller, &resources); controller->root_bus = bus; next_busno = bus->busn_res.end + 1; - } /* Do machine dependent PCI interrupt routing */ @@ -860,7 +903,6 @@ int __init pcibios_init(void) * It allocates all of the resources (I/O memory, etc) * associated with the devices read in above. */ - pci_assign_unassigned_resources(); /* Record the I/O resources in the PCI controller structure. */ @@ -868,9 +910,6 @@ int __init pcibios_init(void) struct pci_controller *controller = &pci_controllers[i]; gxio_trio_context_t *trio_context = controller->trio; struct pci_bus *root_bus = pci_controllers[i].root_bus; - struct pci_bus *next_bus; - uint32_t bus_address_hi; - struct pci_dev *dev; int ret; int j; @@ -884,43 +923,12 @@ int __init pcibios_init(void) /* Configure the max_payload_size values for this domain. */ fixup_read_and_payload_sizes(controller); - list_for_each_entry(dev, &root_bus->devices, bus_list) { - /* Find the PCI host controller, ie. the 1st bridge. */ - if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && - (PCI_SLOT(dev->devfn) == 0)) { - next_bus = dev->subordinate; - pci_controllers[i].mem_resources[0] = - *next_bus->resource[0]; - pci_controllers[i].mem_resources[1] = - *next_bus->resource[1]; - pci_controllers[i].mem_resources[2] = - *next_bus->resource[2]; - - break; - } - } - - if (pci_controllers[i].mem_resources[1].flags & IORESOURCE_MEM) - bus_address_hi = - pci_controllers[i].mem_resources[1].start >> 32; - else if (pci_controllers[i].mem_resources[2].flags & IORESOURCE_PREFETCH) - bus_address_hi = - pci_controllers[i].mem_resources[2].start >> 32; - else { - /* This is unlikely. */ - pr_err("PCI: no memory resources on TRIO %d mac %d\n", - controller->trio_index, controller->mac); - continue; - } - - /* - * Alloc a PIO region for PCI memory access for each RC port. - */ + /* Alloc a PIO region for PCI memory access for each RC port. */ ret = gxio_trio_alloc_pio_regions(trio_context, 1, 0, 0); if (ret < 0) { pr_err("PCI: MEM PIO alloc failure on TRIO %d mac %d, " - "give up\n", controller->trio_index, - controller->mac); + "give up\n", controller->trio_index, + controller->mac); continue; } @@ -938,12 +946,45 @@ int __init pcibios_init(void) 0); if (ret < 0) { pr_err("PCI: MEM PIO init failure on TRIO %d mac %d, " - "give up\n", controller->trio_index, - controller->mac); + "give up\n", controller->trio_index, + controller->mac); continue; } +#ifdef CONFIG_TILE_PCI_IO + /* + * Alloc a PIO region for PCI I/O space access for each RC port. + */ + ret = gxio_trio_alloc_pio_regions(trio_context, 1, 0, 0); + if (ret < 0) { + pr_err("PCI: I/O PIO alloc failure on TRIO %d mac %d, " + "give up\n", controller->trio_index, + controller->mac); + + continue; + } + + controller->pio_io_index = ret; + + /* + * For PIO IO, the bus_address_hi parameter is hard-coded 0 + * because PCI I/O address space is 32-bit. + */ + ret = gxio_trio_init_pio_region_aux(trio_context, + controller->pio_io_index, + controller->mac, + 0, + HV_TRIO_PIO_FLAG_IO_SPACE); + if (ret < 0) { + pr_err("PCI: I/O PIO init failure on TRIO %d mac %d, " + "give up\n", controller->trio_index, + controller->mac); + + continue; + } +#endif + /* * Configure a Mem-Map region for each memory controller so * that Linux can map all of its PA space to the PCI bus. @@ -958,9 +999,9 @@ int __init pcibios_init(void) 0); if (ret < 0) { pr_err("PCI: Mem-Map alloc failure on TRIO %d " - "mac %d for MC %d, give up\n", - controller->trio_index, - controller->mac, j); + "mac %d for MC %d, give up\n", + controller->trio_index, + controller->mac, j); goto alloc_mem_map_failed; } @@ -991,9 +1032,9 @@ int __init pcibios_init(void) GXIO_TRIO_ORDER_MODE_UNORDERED); if (ret < 0) { pr_err("PCI: Mem-Map init failure on TRIO %d " - "mac %d for MC %d, give up\n", - controller->trio_index, - controller->mac, j); + "mac %d for MC %d, give up\n", + controller->trio_index, + controller->mac, j); goto alloc_mem_map_failed; } @@ -1002,23 +1043,19 @@ int __init pcibios_init(void) alloc_mem_map_failed: break; } - } return 0; } subsys_initcall(pcibios_init); -/* Note: to be deleted after Linux 3.6 merge. */ +/* No bus fixups needed. */ void pcibios_fixup_bus(struct pci_bus *bus) { } -/* - * This can be called from the generic PCI layer, but doesn't need to - * do anything. - */ -char *pcibios_setup(char *str) +/* Process any "pci=" kernel boot arguments. */ +char *__init pcibios_setup(char *str) { if (!strcmp(str, "off")) { pci_probe = 0; @@ -1029,8 +1066,7 @@ char *pcibios_setup(char *str) /* * Enable memory address decoding, as appropriate, for the - * device described by the 'dev' struct. The I/O decoding - * is disabled, though the TILE-Gx supports I/O addressing. + * device described by the 'dev' struct. * * This is called from the generic PCI layer, and can be called * for bridges or endpoints. @@ -1040,13 +1076,24 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) return pci_enable_resources(dev, mask); } -/* Called for each device after PCI setup is done. */ +/* + * Called for each device after PCI setup is done. + * We initialize the PCI device capabilities conservatively, assuming that + * all devices can only address the 32-bit DMA space. The exception here is + * that the device dma_offset is set to the value that matches the 64-bit + * capable devices. This is OK because dma_offset is not used by legacy + * dma_ops, nor by the hybrid dma_ops's streaming DMAs, which are 64-bit ops. + * This implementation matches the kernel design of setting PCI devices' + * coherent_dma_mask to 0xffffffffull by default, allowing the device drivers + * to skip calling pci_set_consistent_dma_mask(DMA_BIT_MASK(32)). + */ static void pcibios_fixup_final(struct pci_dev *pdev) { - set_dma_ops(&pdev->dev, gx_pci_dma_map_ops); + set_dma_ops(&pdev->dev, gx_legacy_pci_dma_map_ops); set_dma_offset(&pdev->dev, TILE_PCI_MEM_MAP_BASE_OFFSET); pdev->dev.archdata.max_direct_dma_addr = TILE_PCI_MAX_DIRECT_DMA_ADDRESS; + pdev->dev.coherent_dma_mask = TILE_PCI_MAX_DIRECT_DMA_ADDRESS; } DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_final); @@ -1060,19 +1107,15 @@ void __iomem *ioremap(resource_size_t phys_addr, unsigned long size) resource_size_t start; resource_size_t end; int trio_fd; - int i, j; + int i; start = phys_addr; end = phys_addr + size - 1; /* - * In the following, each PCI controller's mem_resources[1] - * represents its (non-prefetchable) PCI memory resource and - * mem_resources[2] refers to its prefetchable PCI memory resource. - * By searching phys_addr in each controller's mem_resources[], we can + * By searching phys_addr in each controller's mem_space, we can * determine the controller that should accept the PCI memory access. */ - for (i = 0; i < num_rc_controllers; i++) { /* * Skip controllers that are not properly initialized or @@ -1081,25 +1124,18 @@ void __iomem *ioremap(resource_size_t phys_addr, unsigned long size) if (pci_controllers[i].root_bus == NULL) continue; - for (j = 1; j < 3; j++) { - bar_start = - pci_controllers[i].mem_resources[j].start; - bar_end = - pci_controllers[i].mem_resources[j].end; - - if ((start >= bar_start) && (end <= bar_end)) { + bar_start = pci_controllers[i].mem_space.start; + bar_end = pci_controllers[i].mem_space.end; - controller = &pci_controllers[i]; - - goto got_it; - } + if ((start >= bar_start) && (end <= bar_end)) { + controller = &pci_controllers[i]; + break; } } if (controller == NULL) return NULL; -got_it: trio_fd = controller->trio->fd; /* Convert the resource start to the bus address offset. */ @@ -1107,14 +1143,71 @@ got_it: offset = HV_TRIO_PIO_OFFSET(controller->pio_mem_index) + start; - /* - * We need to keep the PCI bus address's in-page offset in the VA. - */ + /* We need to keep the PCI bus address's in-page offset in the VA. */ return iorpc_ioremap(trio_fd, offset, size) + - (phys_addr & (PAGE_SIZE - 1)); + (start & (PAGE_SIZE - 1)); } EXPORT_SYMBOL(ioremap); +#ifdef CONFIG_TILE_PCI_IO +/* Map a PCI I/O address into VA space. */ +void __iomem *ioport_map(unsigned long port, unsigned int size) +{ + struct pci_controller *controller = NULL; + resource_size_t bar_start; + resource_size_t bar_end; + resource_size_t offset; + resource_size_t start; + resource_size_t end; + int trio_fd; + int i; + + start = port; + end = port + size - 1; + + /* + * By searching the port in each controller's io_space, we can + * determine the controller that should accept the PCI I/O access. + */ + for (i = 0; i < num_rc_controllers; i++) { + /* + * Skip controllers that are not properly initialized or + * have down links. + */ + if (pci_controllers[i].root_bus == NULL) + continue; + + bar_start = pci_controllers[i].io_space.start; + bar_end = pci_controllers[i].io_space.end; + + if ((start >= bar_start) && (end <= bar_end)) { + controller = &pci_controllers[i]; + break; + } + } + + if (controller == NULL) + return NULL; + + trio_fd = controller->trio->fd; + + /* Convert the resource start to the bus address offset. */ + port -= controller->io_space.start; + + offset = HV_TRIO_PIO_OFFSET(controller->pio_io_index) + port; + + /* We need to keep the PCI bus address's in-page offset in the VA. */ + return iorpc_ioremap(trio_fd, offset, size) + (port & (PAGE_SIZE - 1)); +} +EXPORT_SYMBOL(ioport_map); + +void ioport_unmap(void __iomem *addr) +{ + iounmap(addr); +} +EXPORT_SYMBOL(ioport_unmap); +#endif + void pci_iounmap(struct pci_dev *dev, void __iomem *addr) { iounmap(addr); @@ -1136,7 +1229,6 @@ EXPORT_SYMBOL(pci_iounmap); * offset is in bytes, from the start of config space for the * specified bus & device. */ - static int tile_cfg_read(struct pci_bus *bus, unsigned int devfn, int offset, int size, u32 *val) { @@ -1186,7 +1278,6 @@ static int tile_cfg_read(struct pci_bus *bus, unsigned int devfn, int offset, * Accesses to the directly attached device have to be * sent as type-0 configs. */ - if (busnum == (controller->first_busno + 1)) { /* * There is only one device off of our built-in P2P bridge. @@ -1208,9 +1299,8 @@ static int tile_cfg_read(struct pci_bus *bus, unsigned int devfn, int offset, * Note that we don't set the mac field in cfg_addr because the * mapping is per port. */ - mmio_addr = trio_context->mmio_base_pio_cfg[controller->mac] + - cfg_addr.word; + cfg_addr.word; valid_device: @@ -1314,7 +1404,6 @@ static int tile_cfg_write(struct pci_bus *bus, unsigned int devfn, int offset, * Accesses to the directly attached device have to be * sent as type-0 configs. */ - if (busnum == (controller->first_busno + 1)) { /* * There is only one device off of our built-in P2P bridge. @@ -1336,7 +1425,6 @@ static int tile_cfg_write(struct pci_bus *bus, unsigned int devfn, int offset, * Note that we don't set the mac field in cfg_addr because the * mapping is per port. */ - mmio_addr = trio_context->mmio_base_pio_cfg[controller->mac] + cfg_addr.word; @@ -1374,11 +1462,8 @@ static struct pci_ops tile_cfg_ops = { }; -/* - * MSI support starts here. - */ -static unsigned int -tilegx_msi_startup(struct irq_data *d) +/* MSI support starts here. */ +static unsigned int tilegx_msi_startup(struct irq_data *d) { if (d->msi_desc) unmask_msi_irq(d); @@ -1386,21 +1471,18 @@ tilegx_msi_startup(struct irq_data *d) return 0; } -static void -tilegx_msi_ack(struct irq_data *d) +static void tilegx_msi_ack(struct irq_data *d) { __insn_mtspr(SPR_IPI_EVENT_RESET_K, 1UL << d->irq); } -static void -tilegx_msi_mask(struct irq_data *d) +static void tilegx_msi_mask(struct irq_data *d) { mask_msi_irq(d); __insn_mtspr(SPR_IPI_MASK_SET_K, 1UL << d->irq); } -static void -tilegx_msi_unmask(struct irq_data *d) +static void tilegx_msi_unmask(struct irq_data *d) { __insn_mtspr(SPR_IPI_MASK_RESET_K, 1UL << d->irq); unmask_msi_irq(d); @@ -1457,32 +1539,55 @@ int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) trio_context = controller->trio; /* - * Allocate the Mem-Map that will accept the MSI write and - * trigger the TILE-side interrupts. + * Allocate a scatter-queue that will accept the MSI write and + * trigger the TILE-side interrupts. We use the scatter-queue regions + * before the mem map regions, because the latter are needed by more + * applications. */ - mem_map = gxio_trio_alloc_memory_maps(trio_context, 1, 0, 0); - if (mem_map < 0) { - dev_printk(KERN_INFO, &pdev->dev, - "%s Mem-Map alloc failure. " - "Failed to initialize MSI interrupts. " - "Falling back to legacy interrupts.\n", - desc->msi_attrib.is_msix ? "MSI-X" : "MSI"); + mem_map = gxio_trio_alloc_scatter_queues(trio_context, 1, 0, 0); + if (mem_map >= 0) { + TRIO_MAP_SQ_DOORBELL_FMT_t doorbell_template = {{ + .pop = 0, + .doorbell = 1, + }}; + + mem_map += TRIO_NUM_MAP_MEM_REGIONS; + mem_map_base = MEM_MAP_INTR_REGIONS_BASE + + mem_map * MEM_MAP_INTR_REGION_SIZE; + mem_map_limit = mem_map_base + MEM_MAP_INTR_REGION_SIZE - 1; + + msi_addr = mem_map_base + MEM_MAP_INTR_REGION_SIZE - 8; + msg.data = (unsigned int)doorbell_template.word; + } else { + /* SQ regions are out, allocate from map mem regions. */ + mem_map = gxio_trio_alloc_memory_maps(trio_context, 1, 0, 0); + if (mem_map < 0) { + dev_printk(KERN_INFO, &pdev->dev, + "%s Mem-Map alloc failure. " + "Failed to initialize MSI interrupts. " + "Falling back to legacy interrupts.\n", + desc->msi_attrib.is_msix ? "MSI-X" : "MSI"); + ret = -ENOMEM; + goto msi_mem_map_alloc_failure; + } - ret = -ENOMEM; - goto msi_mem_map_alloc_failure; + mem_map_base = MEM_MAP_INTR_REGIONS_BASE + + mem_map * MEM_MAP_INTR_REGION_SIZE; + mem_map_limit = mem_map_base + MEM_MAP_INTR_REGION_SIZE - 1; + + msi_addr = mem_map_base + TRIO_MAP_MEM_REG_INT3 - + TRIO_MAP_MEM_REG_INT0; + + msg.data = mem_map; } /* We try to distribute different IRQs to different tiles. */ cpu = tile_irq_cpu(irq); /* - * Now call up to the HV to configure the Mem-Map interrupt and + * Now call up to the HV to configure the MSI interrupt and * set up the IPI binding. */ - mem_map_base = MEM_MAP_INTR_REGIONS_BASE + - mem_map * MEM_MAP_INTR_REGION_SIZE; - mem_map_limit = mem_map_base + MEM_MAP_INTR_REGION_SIZE - 1; - ret = gxio_trio_config_msi_intr(trio_context, cpu_x(cpu), cpu_y(cpu), KERNEL_PL, irq, controller->mac, mem_map, mem_map_base, mem_map_limit, @@ -1495,13 +1600,9 @@ int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) irq_set_msi_desc(irq, desc); - msi_addr = mem_map_base + TRIO_MAP_MEM_REG_INT3 - TRIO_MAP_MEM_REG_INT0; - msg.address_hi = msi_addr >> 32; msg.address_lo = msi_addr & 0xffffffff; - msg.data = mem_map; - write_msi_msg(irq, &msg); irq_set_chip_and_handler(irq, &tilegx_msi_chip, handle_level_irq); irq_set_handler_data(irq, controller); diff --git a/arch/tile/kernel/proc.c b/arch/tile/kernel/proc.c index dafc447..681100c 100644 --- a/arch/tile/kernel/proc.c +++ b/arch/tile/kernel/proc.c @@ -113,7 +113,6 @@ arch_initcall(proc_tile_init); * Support /proc/sys/tile directory */ -#ifndef __tilegx__ /* FIXME: GX: no support for unaligned access yet */ static ctl_table unaligned_subtable[] = { { .procname = "enabled", @@ -160,4 +159,3 @@ static int __init proc_sys_tile_init(void) } arch_initcall(proc_sys_tile_init); -#endif diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index 8ac3044..16ed589 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -33,6 +33,7 @@ #include <asm/syscalls.h> #include <asm/traps.h> #include <asm/setup.h> +#include <asm/uaccess.h> #ifdef CONFIG_HARDWALL #include <asm/hardwall.h> #endif @@ -74,19 +75,6 @@ void arch_release_thread_info(struct thread_info *info) { struct single_step_state *step_state = info->step_state; -#ifdef CONFIG_HARDWALL - /* - * We free a thread_info from the context of the task that has - * been scheduled next, so the original task is already dead. - * Calling deactivate here just frees up the data structures. - * If the task we're freeing held the last reference to a - * hardwall fd, it would have been released prior to this point - * anyway via exit_files(), and the hardwall_task.info pointers - * would be NULL by now. - */ - hardwall_deactivate_all(info->task); -#endif - if (step_state) { /* @@ -160,6 +148,14 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, */ task_thread_info(p)->step_state = NULL; +#ifdef __tilegx__ + /* + * Do not clone unalign jit fixup from the parent; each thread + * must allocate its own on demand. + */ + task_thread_info(p)->unalign_jit_base = NULL; +#endif + /* * Copy the registers onto the kernel stack so the * return-from-interrupt code will reload it into registers. @@ -191,16 +187,8 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, memset(&p->thread.dma_async_tlb, 0, sizeof(struct async_tlb)); #endif -#if CHIP_HAS_SN_PROC() - /* Likewise, the new thread is not running static processor code. */ - p->thread.sn_proc_running = 0; - memset(&p->thread.sn_async_tlb, 0, sizeof(struct async_tlb)); -#endif - -#if CHIP_HAS_PROC_STATUS_SPR() /* New thread has its miscellaneous processor state bits clear. */ p->thread.proc_status = 0; -#endif #ifdef CONFIG_HARDWALL /* New thread does not own any networks. */ @@ -218,19 +206,32 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, return 0; } +int set_unalign_ctl(struct task_struct *tsk, unsigned int val) +{ + task_thread_info(tsk)->align_ctl = val; + return 0; +} + +int get_unalign_ctl(struct task_struct *tsk, unsigned long adr) +{ + return put_user(task_thread_info(tsk)->align_ctl, + (unsigned int __user *)adr); +} + +static struct task_struct corrupt_current = { .comm = "<corrupt>" }; + /* * Return "current" if it looks plausible, or else a pointer to a dummy. * This can be helpful if we are just trying to emit a clean panic. */ struct task_struct *validate_current(void) { - static struct task_struct corrupt = { .comm = "<corrupt>" }; struct task_struct *tsk = current; if (unlikely((unsigned long)tsk < PAGE_OFFSET || (high_memory && (void *)tsk > high_memory) || ((unsigned long)tsk & (__alignof__(*tsk) - 1)) != 0)) { pr_err("Corrupt 'current' %p (sp %#lx)\n", tsk, stack_pointer); - tsk = &corrupt; + tsk = &corrupt_current; } return tsk; } @@ -369,15 +370,11 @@ static void save_arch_state(struct thread_struct *t) t->system_save[2] = __insn_mfspr(SPR_SYSTEM_SAVE_0_2); t->system_save[3] = __insn_mfspr(SPR_SYSTEM_SAVE_0_3); t->intctrl_0 = __insn_mfspr(SPR_INTCTRL_0_STATUS); -#if CHIP_HAS_PROC_STATUS_SPR() t->proc_status = __insn_mfspr(SPR_PROC_STATUS); -#endif #if !CHIP_HAS_FIXED_INTVEC_BASE() t->interrupt_vector_base = __insn_mfspr(SPR_INTERRUPT_VECTOR_BASE_0); #endif -#if CHIP_HAS_TILE_RTF_HWM() t->tile_rtf_hwm = __insn_mfspr(SPR_TILE_RTF_HWM); -#endif #if CHIP_HAS_DSTREAM_PF() t->dstream_pf = __insn_mfspr(SPR_DSTREAM_PF); #endif @@ -398,15 +395,11 @@ static void restore_arch_state(const struct thread_struct *t) __insn_mtspr(SPR_SYSTEM_SAVE_0_2, t->system_save[2]); __insn_mtspr(SPR_SYSTEM_SAVE_0_3, t->system_save[3]); __insn_mtspr(SPR_INTCTRL_0_STATUS, t->intctrl_0); -#if CHIP_HAS_PROC_STATUS_SPR() __insn_mtspr(SPR_PROC_STATUS, t->proc_status); -#endif #if !CHIP_HAS_FIXED_INTVEC_BASE() __insn_mtspr(SPR_INTERRUPT_VECTOR_BASE_0, t->interrupt_vector_base); #endif -#if CHIP_HAS_TILE_RTF_HWM() __insn_mtspr(SPR_TILE_RTF_HWM, t->tile_rtf_hwm); -#endif #if CHIP_HAS_DSTREAM_PF() __insn_mtspr(SPR_DSTREAM_PF, t->dstream_pf); #endif @@ -415,26 +408,11 @@ static void restore_arch_state(const struct thread_struct *t) void _prepare_arch_switch(struct task_struct *next) { -#if CHIP_HAS_SN_PROC() - int snctl; -#endif #if CHIP_HAS_TILE_DMA() struct tile_dma_state *dma = ¤t->thread.tile_dma_state; if (dma->enabled) save_tile_dma_state(dma); #endif -#if CHIP_HAS_SN_PROC() - /* - * Suspend the static network processor if it was running. - * We do not suspend the fabric itself, just like we don't - * try to suspend the UDN. - */ - snctl = __insn_mfspr(SPR_SNCTL); - current->thread.sn_proc_running = - (snctl & SPR_SNCTL__FRZPROC_MASK) == 0; - if (current->thread.sn_proc_running) - __insn_mtspr(SPR_SNCTL, snctl | SPR_SNCTL__FRZPROC_MASK); -#endif } @@ -462,17 +440,6 @@ struct task_struct *__sched _switch_to(struct task_struct *prev, /* Restore other arch state. */ restore_arch_state(&next->thread); -#if CHIP_HAS_SN_PROC() - /* - * Restart static network processor in the new process - * if it was running before. - */ - if (next->thread.sn_proc_running) { - int snctl = __insn_mfspr(SPR_SNCTL); - __insn_mtspr(SPR_SNCTL, snctl & ~SPR_SNCTL__FRZPROC_MASK); - } -#endif - #ifdef CONFIG_HARDWALL /* Enable or disable access to the network registers appropriately. */ hardwall_switch_tasks(prev, next); @@ -514,7 +481,7 @@ int do_work_pending(struct pt_regs *regs, u32 thread_info_flags) schedule(); return 1; } -#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() +#if CHIP_HAS_TILE_DMA() if (thread_info_flags & _TIF_ASYNC_TLB) { do_async_page_fault(regs); return 1; @@ -564,7 +531,15 @@ void flush_thread(void) */ void exit_thread(void) { - /* Nothing */ +#ifdef CONFIG_HARDWALL + /* + * Remove the task from the list of tasks that are associated + * with any live hardwalls. (If the task that is exiting held + * the last reference to a hardwall fd, it would already have + * been released and deactivated at this point.) + */ + hardwall_deactivate_all(current); +#endif } void show_regs(struct pt_regs *regs) @@ -573,23 +548,24 @@ void show_regs(struct pt_regs *regs) int i; pr_err("\n"); - show_regs_print_info(KERN_ERR); + if (tsk != &corrupt_current) + show_regs_print_info(KERN_ERR); #ifdef __tilegx__ - for (i = 0; i < 51; i += 3) + for (i = 0; i < 17; i++) pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT" r%-2d: "REGFMT"\n", - i, regs->regs[i], i+1, regs->regs[i+1], - i+2, regs->regs[i+2]); - pr_err(" r51: "REGFMT" r52: "REGFMT" tp : "REGFMT"\n", - regs->regs[51], regs->regs[52], regs->tp); + i, regs->regs[i], i+18, regs->regs[i+18], + i+36, regs->regs[i+36]); + pr_err(" r17: "REGFMT" r35: "REGFMT" tp : "REGFMT"\n", + regs->regs[17], regs->regs[35], regs->tp); pr_err(" sp : "REGFMT" lr : "REGFMT"\n", regs->sp, regs->lr); #else - for (i = 0; i < 52; i += 4) + for (i = 0; i < 13; i++) pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT " r%-2d: "REGFMT" r%-2d: "REGFMT"\n", - i, regs->regs[i], i+1, regs->regs[i+1], - i+2, regs->regs[i+2], i+3, regs->regs[i+3]); - pr_err(" r52: "REGFMT" tp : "REGFMT" sp : "REGFMT" lr : "REGFMT"\n", - regs->regs[52], regs->tp, regs->sp, regs->lr); + i, regs->regs[i], i+14, regs->regs[i+14], + i+27, regs->regs[i+27], i+40, regs->regs[i+40]); + pr_err(" r13: "REGFMT" tp : "REGFMT" sp : "REGFMT" lr : "REGFMT"\n", + regs->regs[13], regs->tp, regs->sp, regs->lr); #endif pr_err(" pc : "REGFMT" ex1: %ld faultnum: %ld\n", regs->pc, regs->ex1, regs->faultnum); diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index 0f83ed4..de98c6d 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -265,6 +265,21 @@ int do_syscall_trace_enter(struct pt_regs *regs) void do_syscall_trace_exit(struct pt_regs *regs) { + long errno; + + /* + * The standard tile calling convention returns the value (or negative + * errno) in r0, and zero (or positive errno) in r1. + * It saves a couple of cycles on the hot path to do this work in + * registers only as we return, rather than updating the in-memory + * struct ptregs. + */ + errno = (long) regs->regs[0]; + if (errno < 0 && errno > -4096) + regs->regs[1] = -errno; + else + regs->regs[1] = 0; + if (test_thread_flag(TIF_SYSCALL_TRACE)) tracehook_report_syscall_exit(regs, 0); @@ -272,7 +287,7 @@ void do_syscall_trace_exit(struct pt_regs *regs) trace_sys_exit(regs, regs->regs[0]); } -void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) +void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs) { struct siginfo info; @@ -288,5 +303,5 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) /* Handle synthetic interrupt delivered only by the simulator. */ void __kprobes do_breakpoint(struct pt_regs* regs, int fault_num) { - send_sigtrap(current, regs, fault_num); + send_sigtrap(current, regs); } diff --git a/arch/tile/kernel/reboot.c b/arch/tile/kernel/reboot.c index d1b5c91..6c5d2c0 100644 --- a/arch/tile/kernel/reboot.c +++ b/arch/tile/kernel/reboot.c @@ -27,7 +27,6 @@ void machine_halt(void) { - warn_early_printk(); arch_local_irq_disable_all(); smp_send_stop(); hv_halt(); @@ -35,7 +34,6 @@ void machine_halt(void) void machine_power_off(void) { - warn_early_printk(); arch_local_irq_disable_all(); smp_send_stop(); hv_power_off(); diff --git a/arch/tile/kernel/regs_32.S b/arch/tile/kernel/regs_32.S index c12280c..542cae1 100644 --- a/arch/tile/kernel/regs_32.S +++ b/arch/tile/kernel/regs_32.S @@ -20,7 +20,7 @@ #include <asm/switch_to.h> /* - * See <asm/system.h>; called with prev and next task_struct pointers. + * See <asm/switch_to.h>; called with prev and next task_struct pointers. * "prev" is returned in r0 for _switch_to and also for ret_from_fork. * * We want to save pc/sp in "prev", and get the new pc/sp from "next". @@ -39,7 +39,7 @@ */ #if CALLEE_SAVED_REGS_COUNT != 24 -# error Mismatch between <asm/system.h> and kernel/entry.S +# error Mismatch between <asm/switch_to.h> and kernel/entry.S #endif #define FRAME_SIZE ((2 + CALLEE_SAVED_REGS_COUNT) * 4) diff --git a/arch/tile/kernel/regs_64.S b/arch/tile/kernel/regs_64.S index 0829fd0..bbffcc6 100644 --- a/arch/tile/kernel/regs_64.S +++ b/arch/tile/kernel/regs_64.S @@ -20,7 +20,7 @@ #include <asm/switch_to.h> /* - * See <asm/system.h>; called with prev and next task_struct pointers. + * See <asm/switch_to.h>; called with prev and next task_struct pointers. * "prev" is returned in r0 for _switch_to and also for ret_from_fork. * * We want to save pc/sp in "prev", and get the new pc/sp from "next". @@ -39,7 +39,7 @@ */ #if CALLEE_SAVED_REGS_COUNT != 24 -# error Mismatch between <asm/system.h> and kernel/entry.S +# error Mismatch between <asm/switch_to.h> and kernel/entry.S #endif #define FRAME_SIZE ((2 + CALLEE_SAVED_REGS_COUNT) * 8) diff --git a/arch/tile/kernel/relocate_kernel_32.S b/arch/tile/kernel/relocate_kernel_32.S index 010b418..e44fbcf 100644 --- a/arch/tile/kernel/relocate_kernel_32.S +++ b/arch/tile/kernel/relocate_kernel_32.S @@ -20,15 +20,6 @@ #include <asm/page.h> #include <hv/hypervisor.h> -#define ___hvb MEM_SV_INTRPT + HV_GLUE_START_CPA - -#define ___hv_dispatch(f) (___hvb + (HV_DISPATCH_ENTRY_SIZE * f)) - -#define ___hv_console_putc ___hv_dispatch(HV_DISPATCH_CONSOLE_PUTC) -#define ___hv_halt ___hv_dispatch(HV_DISPATCH_HALT) -#define ___hv_reexec ___hv_dispatch(HV_DISPATCH_REEXEC) -#define ___hv_flush_remote ___hv_dispatch(HV_DISPATCH_FLUSH_REMOTE) - #undef RELOCATE_NEW_KERNEL_VERBOSE STD_ENTRY(relocate_new_kernel) @@ -43,8 +34,8 @@ STD_ENTRY(relocate_new_kernel) addi sp, sp, -8 /* we now have a stack (whether we need one or not) */ - moveli r40, lo16(___hv_console_putc) - auli r40, r40, ha16(___hv_console_putc) + moveli r40, lo16(hv_console_putc) + auli r40, r40, ha16(hv_console_putc) #ifdef RELOCATE_NEW_KERNEL_VERBOSE moveli r0, 'r' @@ -86,7 +77,6 @@ STD_ENTRY(relocate_new_kernel) move r30, sp addi sp, sp, -8 -#if CHIP_HAS_CBOX_HOME_MAP() /* * On TILEPro, we need to flush all tiles' caches, since we may * have been doing hash-for-home caching there. Note that we @@ -114,15 +104,14 @@ STD_ENTRY(relocate_new_kernel) } { move r8, zero /* asids */ - moveli r20, lo16(___hv_flush_remote) + moveli r20, lo16(hv_flush_remote) } { move r9, zero /* asidcount */ - auli r20, r20, ha16(___hv_flush_remote) + auli r20, r20, ha16(hv_flush_remote) } jalr r20 -#endif /* r33 is destination pointer, default to zero */ @@ -175,8 +164,8 @@ STD_ENTRY(relocate_new_kernel) move r0, r32 moveli r1, 0 /* arg to hv_reexec is 64 bits */ - moveli r41, lo16(___hv_reexec) - auli r41, r41, ha16(___hv_reexec) + moveli r41, lo16(hv_reexec) + auli r41, r41, ha16(hv_reexec) jalr r41 @@ -267,8 +256,8 @@ STD_ENTRY(relocate_new_kernel) moveli r0, '\n' jalr r40 .Lhalt: - moveli r41, lo16(___hv_halt) - auli r41, r41, ha16(___hv_halt) + moveli r41, lo16(hv_halt) + auli r41, r41, ha16(hv_halt) jalr r41 STD_ENDPROC(relocate_new_kernel) diff --git a/arch/tile/kernel/relocate_kernel_64.S b/arch/tile/kernel/relocate_kernel_64.S index 1c09a4f..d9d8cf6 100644 --- a/arch/tile/kernel/relocate_kernel_64.S +++ b/arch/tile/kernel/relocate_kernel_64.S @@ -34,11 +34,11 @@ STD_ENTRY(relocate_new_kernel) addi sp, sp, -8 /* we now have a stack (whether we need one or not) */ +#ifdef RELOCATE_NEW_KERNEL_VERBOSE moveli r40, hw2_last(hv_console_putc) shl16insli r40, r40, hw1(hv_console_putc) shl16insli r40, r40, hw0(hv_console_putc) -#ifdef RELOCATE_NEW_KERNEL_VERBOSE moveli r0, 'r' jalr r40 @@ -78,7 +78,6 @@ STD_ENTRY(relocate_new_kernel) move r30, sp addi sp, sp, -16 -#if CHIP_HAS_CBOX_HOME_MAP() /* * On TILE-GX, we need to flush all tiles' caches, since we may * have been doing hash-for-home caching there. Note that we @@ -116,7 +115,6 @@ STD_ENTRY(relocate_new_kernel) shl16insli r20, r20, hw0(hv_flush_remote) jalr r20 -#endif /* r33 is destination pointer, default to zero */ @@ -176,10 +174,12 @@ STD_ENTRY(relocate_new_kernel) /* we should not get here */ +#ifdef RELOCATE_NEW_KERNEL_VERBOSE moveli r0, '?' jalr r40 moveli r0, '\n' jalr r40 +#endif j .Lhalt @@ -237,7 +237,9 @@ STD_ENTRY(relocate_new_kernel) j .Lloop -.Lerr: moveli r0, 'e' +.Lerr: +#ifdef RELOCATE_NEW_KERNEL_VERBOSE + moveli r0, 'e' jalr r40 moveli r0, 'r' jalr r40 @@ -245,6 +247,7 @@ STD_ENTRY(relocate_new_kernel) jalr r40 moveli r0, '\n' jalr r40 +#endif .Lhalt: moveli r41, hw2_last(hv_halt) shl16insli r41, r41, hw1(hv_halt) diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c index eceb834..4c34cae 100644 --- a/arch/tile/kernel/setup.c +++ b/arch/tile/kernel/setup.c @@ -154,6 +154,65 @@ static int __init setup_maxnodemem(char *str) } early_param("maxnodemem", setup_maxnodemem); +struct memmap_entry { + u64 addr; /* start of memory segment */ + u64 size; /* size of memory segment */ +}; +static struct memmap_entry memmap_map[64]; +static int memmap_nr; + +static void add_memmap_region(u64 addr, u64 size) +{ + if (memmap_nr >= ARRAY_SIZE(memmap_map)) { + pr_err("Ooops! Too many entries in the memory map!\n"); + return; + } + memmap_map[memmap_nr].addr = addr; + memmap_map[memmap_nr].size = size; + memmap_nr++; +} + +static int __init setup_memmap(char *p) +{ + char *oldp; + u64 start_at, mem_size; + + if (!p) + return -EINVAL; + + if (!strncmp(p, "exactmap", 8)) { + pr_err("\"memmap=exactmap\" not valid on tile\n"); + return 0; + } + + oldp = p; + mem_size = memparse(p, &p); + if (p == oldp) + return -EINVAL; + + if (*p == '@') { + pr_err("\"memmap=nn@ss\" (force RAM) invalid on tile\n"); + } else if (*p == '#') { + pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on tile\n"); + } else if (*p == '$') { + start_at = memparse(p+1, &p); + add_memmap_region(start_at, mem_size); + } else { + if (mem_size == 0) + return -EINVAL; + maxmem_pfn = (mem_size >> HPAGE_SHIFT) << + (HPAGE_SHIFT - PAGE_SHIFT); + } + return *p == '\0' ? 0 : -EINVAL; +} +early_param("memmap", setup_memmap); + +static int __init setup_mem(char *str) +{ + return setup_maxmem(str); +} +early_param("mem", setup_mem); /* compatibility with x86 */ + static int __init setup_isolnodes(char *str) { char buf[MAX_NUMNODES * 5]; @@ -209,7 +268,7 @@ early_param("vmalloc", parse_vmalloc); /* * Determine for each controller where its lowmem is mapped and how much of * it is mapped there. On controller zero, the first few megabytes are - * already mapped in as code at MEM_SV_INTRPT, so in principle we could + * already mapped in as code at MEM_SV_START, so in principle we could * start our data mappings higher up, but for now we don't bother, to avoid * additional confusion. * @@ -614,11 +673,12 @@ static void __init setup_bootmem_allocator_node(int i) /* * Throw away any memory aliased by the PCI region. */ - if (pci_reserve_start_pfn < end && pci_reserve_end_pfn > start) - reserve_bootmem(PFN_PHYS(pci_reserve_start_pfn), - PFN_PHYS(pci_reserve_end_pfn - - pci_reserve_start_pfn), + if (pci_reserve_start_pfn < end && pci_reserve_end_pfn > start) { + start = max(pci_reserve_start_pfn, start); + end = min(pci_reserve_end_pfn, end); + reserve_bootmem(PFN_PHYS(start), PFN_PHYS(end - start), BOOTMEM_EXCLUSIVE); + } #endif } @@ -628,6 +688,31 @@ static void __init setup_bootmem_allocator(void) for (i = 0; i < MAX_NUMNODES; ++i) setup_bootmem_allocator_node(i); + /* Reserve any memory excluded by "memmap" arguments. */ + for (i = 0; i < memmap_nr; ++i) { + struct memmap_entry *m = &memmap_map[i]; + reserve_bootmem(m->addr, m->size, 0); + } + +#ifdef CONFIG_BLK_DEV_INITRD + if (initrd_start) { + /* Make sure the initrd memory region is not modified. */ + if (reserve_bootmem(initrd_start, initrd_end - initrd_start, + BOOTMEM_EXCLUSIVE)) { + pr_crit("The initrd memory region has been polluted. Disabling it.\n"); + initrd_start = 0; + initrd_end = 0; + } else { + /* + * Translate initrd_start & initrd_end from PA to VA for + * future access. + */ + initrd_start += PAGE_OFFSET; + initrd_end += PAGE_OFFSET; + } + } +#endif + #ifdef CONFIG_KEXEC if (crashk_res.start != crashk_res.end) reserve_bootmem(crashk_res.start, resource_size(&crashk_res), 0); @@ -961,9 +1046,6 @@ void setup_cpu(int boot) arch_local_irq_unmask(INT_DMATLB_MISS); arch_local_irq_unmask(INT_DMATLB_ACCESS); #endif -#if CHIP_HAS_SN_PROC() - arch_local_irq_unmask(INT_SNITLB_MISS); -#endif #ifdef __tilegx__ arch_local_irq_unmask(INT_SINGLE_STEP_K); #endif @@ -978,10 +1060,6 @@ void setup_cpu(int boot) /* Static network is not restricted. */ __insn_mtspr(SPR_MPL_SN_ACCESS_SET_0, 1); #endif -#if CHIP_HAS_SN_PROC() - __insn_mtspr(SPR_MPL_SN_NOTIFY_SET_0, 1); - __insn_mtspr(SPR_MPL_SN_CPL_SET_0, 1); -#endif /* * Set the MPL for interrupt control 0 & 1 to the corresponding @@ -1029,6 +1107,10 @@ static void __init load_hv_initrd(void) int fd, rc; void *initrd; + /* If initrd has already been set, skip initramfs file in hvfs. */ + if (initrd_start) + return; + fd = hv_fs_findfile((HV_VirtAddr) initramfs_file); if (fd == HV_ENOENT) { if (set_initramfs_file) { @@ -1067,6 +1149,25 @@ void __init free_initrd_mem(unsigned long begin, unsigned long end) free_bootmem(__pa(begin), end - begin); } +static int __init setup_initrd(char *str) +{ + char *endp; + unsigned long initrd_size; + + initrd_size = str ? simple_strtoul(str, &endp, 0) : 0; + if (initrd_size == 0 || *endp != '@') + return -EINVAL; + + initrd_start = simple_strtoul(endp+1, &endp, 0); + if (initrd_start == 0) + return -EINVAL; + + initrd_end = initrd_start + initrd_size; + + return 0; +} +early_param("initrd", setup_initrd); + #else static inline void load_hv_initrd(void) {} #endif /* CONFIG_BLK_DEV_INITRD */ @@ -1134,7 +1235,7 @@ static void __init validate_va(void) #ifndef __tilegx__ /* FIXME: GX: probably some validation relevant here */ /* * Similarly, make sure we're only using allowed VAs. - * We assume we can contiguously use MEM_USER_INTRPT .. MEM_HV_INTRPT, + * We assume we can contiguously use MEM_USER_INTRPT .. MEM_HV_START, * and 0 .. KERNEL_HIGH_VADDR. * In addition, make sure we CAN'T use the end of memory, since * we use the last chunk of each pgd for the pgd_list. @@ -1149,7 +1250,7 @@ static void __init validate_va(void) if (range.size == 0) break; if (range.start <= MEM_USER_INTRPT && - range.start + range.size >= MEM_HV_INTRPT) + range.start + range.size >= MEM_HV_START) user_kernel_ok = 1; if (range.start == 0) max_va = range.size; @@ -1183,7 +1284,6 @@ static void __init validate_va(void) struct cpumask __write_once cpu_lotar_map; EXPORT_SYMBOL(cpu_lotar_map); -#if CHIP_HAS_CBOX_HOME_MAP() /* * hash_for_home_map lists all the tiles that hash-for-home data * will be cached on. Note that this may includes tiles that are not @@ -1193,7 +1293,6 @@ EXPORT_SYMBOL(cpu_lotar_map); */ struct cpumask hash_for_home_map; EXPORT_SYMBOL(hash_for_home_map); -#endif /* * cpu_cacheable_map lists all the cpus whose caches the hypervisor can @@ -1286,7 +1385,6 @@ static void __init setup_cpu_maps(void) cpu_lotar_map = *cpu_possible_mask; } -#if CHIP_HAS_CBOX_HOME_MAP() /* Retrieve set of CPUs used for hash-for-home caching */ rc = hv_inquire_tiles(HV_INQ_TILES_HFH_CACHE, (HV_VirtAddr) hash_for_home_map.bits, @@ -1294,9 +1392,6 @@ static void __init setup_cpu_maps(void) if (rc < 0) early_panic("hv_inquire_tiles(HFH_CACHE) failed: rc %d\n", rc); cpumask_or(&cpu_cacheable_map, cpu_possible_mask, &hash_for_home_map); -#else - cpu_cacheable_map = *cpu_possible_mask; -#endif } @@ -1492,7 +1587,7 @@ void __init setup_per_cpu_areas(void) /* Update the vmalloc mapping and page home. */ unsigned long addr = (unsigned long)ptr + i; - pte_t *ptep = virt_to_pte(NULL, addr); + pte_t *ptep = virt_to_kpte(addr); pte_t pte = *ptep; BUG_ON(pfn != pte_pfn(pte)); pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_TILE_L3); @@ -1501,12 +1596,12 @@ void __init setup_per_cpu_areas(void) /* Update the lowmem mapping for consistency. */ lowmem_va = (unsigned long)pfn_to_kaddr(pfn); - ptep = virt_to_pte(NULL, lowmem_va); + ptep = virt_to_kpte(lowmem_va); if (pte_huge(*ptep)) { printk(KERN_DEBUG "early shatter of huge page" " at %#lx\n", lowmem_va); shatter_pmd((pmd_t *)ptep); - ptep = virt_to_pte(NULL, lowmem_va); + ptep = virt_to_kpte(lowmem_va); BUG_ON(pte_huge(*ptep)); } BUG_ON(pfn != pte_pfn(*ptep)); @@ -1548,6 +1643,8 @@ insert_non_bus_resource(void) { struct resource *res = kzalloc(sizeof(struct resource), GFP_ATOMIC); + if (!res) + return NULL; res->name = "Non-Bus Physical Address Space"; res->start = (1ULL << 32); res->end = -1LL; @@ -1561,11 +1658,13 @@ insert_non_bus_resource(void) #endif static struct resource* __init -insert_ram_resource(u64 start_pfn, u64 end_pfn) +insert_ram_resource(u64 start_pfn, u64 end_pfn, bool reserved) { struct resource *res = kzalloc(sizeof(struct resource), GFP_ATOMIC); - res->name = "System RAM"; + if (!res) + return NULL; + res->name = reserved ? "Reserved" : "System RAM"; res->start = start_pfn << PAGE_SHIFT; res->end = (end_pfn << PAGE_SHIFT) - 1; res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; @@ -1585,7 +1684,7 @@ insert_ram_resource(u64 start_pfn, u64 end_pfn) static int __init request_standard_resources(void) { int i; - enum { CODE_DELTA = MEM_SV_INTRPT - PAGE_OFFSET }; + enum { CODE_DELTA = MEM_SV_START - PAGE_OFFSET }; #if defined(CONFIG_PCI) && !defined(__tilegx__) insert_non_bus_resource(); @@ -1600,11 +1699,11 @@ static int __init request_standard_resources(void) end_pfn > pci_reserve_start_pfn) { if (end_pfn > pci_reserve_end_pfn) insert_ram_resource(pci_reserve_end_pfn, - end_pfn); + end_pfn, 0); end_pfn = pci_reserve_start_pfn; } #endif - insert_ram_resource(start_pfn, end_pfn); + insert_ram_resource(start_pfn, end_pfn, 0); } code_resource.start = __pa(_text - CODE_DELTA); @@ -1615,6 +1714,13 @@ static int __init request_standard_resources(void) insert_resource(&iomem_resource, &code_resource); insert_resource(&iomem_resource, &data_resource); + /* Mark any "memmap" regions busy for the resource manager. */ + for (i = 0; i < memmap_nr; ++i) { + struct memmap_entry *m = &memmap_map[i]; + insert_ram_resource(PFN_DOWN(m->addr), + PFN_UP(m->addr + m->size - 1), 1); + } + #ifdef CONFIG_KEXEC insert_resource(&iomem_resource, &crashk_res); #endif diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c index 9531845b..2d1dbf3 100644 --- a/arch/tile/kernel/signal.c +++ b/arch/tile/kernel/signal.c @@ -33,6 +33,7 @@ #include <asm/ucontext.h> #include <asm/sigframe.h> #include <asm/syscalls.h> +#include <asm/vdso.h> #include <arch/interrupts.h> #define DEBUG_SIG 0 @@ -190,7 +191,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, if (err) goto give_sigsegv; - restorer = VDSO_BASE; + restorer = VDSO_SYM(&__vdso_rt_sigreturn); if (ka->sa.sa_flags & SA_RESTORER) restorer = (unsigned long) ka->sa.sa_restorer; diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c index 27742e8..de07fa7 100644 --- a/arch/tile/kernel/single_step.c +++ b/arch/tile/kernel/single_step.c @@ -12,41 +12,30 @@ * more details. * * A code-rewriter that enables instruction single-stepping. - * Derived from iLib's single-stepping code. */ -#ifndef __tilegx__ /* Hardware support for single step unavailable. */ - -/* These functions are only used on the TILE platform */ +#include <linux/smp.h> +#include <linux/ptrace.h> #include <linux/slab.h> #include <linux/thread_info.h> #include <linux/uaccess.h> #include <linux/mman.h> #include <linux/types.h> #include <linux/err.h> +#include <linux/prctl.h> #include <asm/cacheflush.h> +#include <asm/traps.h> +#include <asm/uaccess.h> #include <asm/unaligned.h> #include <arch/abi.h> +#include <arch/spr_def.h> #include <arch/opcode.h> -#define signExtend17(val) sign_extend((val), 17) -#define TILE_X1_MASK (0xffffffffULL << 31) - -int unaligned_printk; -static int __init setup_unaligned_printk(char *str) -{ - long val; - if (strict_strtol(str, 0, &val) != 0) - return 0; - unaligned_printk = val; - pr_info("Printk for each unaligned data accesses is %s\n", - unaligned_printk ? "enabled" : "disabled"); - return 1; -} -__setup("unaligned_printk=", setup_unaligned_printk); +#ifndef __tilegx__ /* Hardware support for single step unavailable. */ -unsigned int unaligned_fixup_count; +#define signExtend17(val) sign_extend((val), 17) +#define TILE_X1_MASK (0xffffffffULL << 31) enum mem_op { MEMOP_NONE, @@ -56,12 +45,13 @@ enum mem_op { MEMOP_STORE_POSTINCR }; -static inline tile_bundle_bits set_BrOff_X1(tile_bundle_bits n, s32 offset) +static inline tilepro_bundle_bits set_BrOff_X1(tilepro_bundle_bits n, + s32 offset) { - tile_bundle_bits result; + tilepro_bundle_bits result; /* mask out the old offset */ - tile_bundle_bits mask = create_BrOff_X1(-1); + tilepro_bundle_bits mask = create_BrOff_X1(-1); result = n & (~mask); /* or in the new offset */ @@ -70,10 +60,11 @@ static inline tile_bundle_bits set_BrOff_X1(tile_bundle_bits n, s32 offset) return result; } -static inline tile_bundle_bits move_X1(tile_bundle_bits n, int dest, int src) +static inline tilepro_bundle_bits move_X1(tilepro_bundle_bits n, int dest, + int src) { - tile_bundle_bits result; - tile_bundle_bits op; + tilepro_bundle_bits result; + tilepro_bundle_bits op; result = n & (~TILE_X1_MASK); @@ -87,13 +78,13 @@ static inline tile_bundle_bits move_X1(tile_bundle_bits n, int dest, int src) return result; } -static inline tile_bundle_bits nop_X1(tile_bundle_bits n) +static inline tilepro_bundle_bits nop_X1(tilepro_bundle_bits n) { return move_X1(n, TREG_ZERO, TREG_ZERO); } -static inline tile_bundle_bits addi_X1( - tile_bundle_bits n, int dest, int src, int imm) +static inline tilepro_bundle_bits addi_X1( + tilepro_bundle_bits n, int dest, int src, int imm) { n &= ~TILE_X1_MASK; @@ -107,15 +98,26 @@ static inline tile_bundle_bits addi_X1( return n; } -static tile_bundle_bits rewrite_load_store_unaligned( +static tilepro_bundle_bits rewrite_load_store_unaligned( struct single_step_state *state, - tile_bundle_bits bundle, + tilepro_bundle_bits bundle, struct pt_regs *regs, enum mem_op mem_op, int size, int sign_ext) { unsigned char __user *addr; int val_reg, addr_reg, err, val; + int align_ctl; + + align_ctl = unaligned_fixup; + switch (task_thread_info(current)->align_ctl) { + case PR_UNALIGN_NOPRINT: + align_ctl = 1; + break; + case PR_UNALIGN_SIGBUS: + align_ctl = 0; + break; + } /* Get address and value registers */ if (bundle & TILEPRO_BUNDLE_Y_ENCODING_MASK) { @@ -160,7 +162,7 @@ static tile_bundle_bits rewrite_load_store_unaligned( * tilepro hardware would be doing, if it could provide us with the * actual bad address in an SPR, which it doesn't. */ - if (unaligned_fixup == 0) { + if (align_ctl == 0) { siginfo_t info = { .si_signo = SIGBUS, .si_code = BUS_ADRALN, @@ -209,14 +211,14 @@ static tile_bundle_bits rewrite_load_store_unaligned( if (err) { siginfo_t info = { - .si_signo = SIGSEGV, - .si_code = SEGV_MAPERR, + .si_signo = SIGBUS, + .si_code = BUS_ADRALN, .si_addr = addr }; - trace_unhandled_signal("segfault", regs, - (unsigned long)addr, SIGSEGV); + trace_unhandled_signal("bad address for unaligned fixup", regs, + (unsigned long)addr, SIGBUS); force_sig_info(info.si_signo, &info, current); - return (tile_bundle_bits) 0; + return (tilepro_bundle_bits) 0; } if (unaligned_printk || unaligned_fixup_count == 0) { @@ -285,7 +287,7 @@ void single_step_execve(void) ti->step_state = NULL; } -/** +/* * single_step_once() - entry point when single stepping has been triggered. * @regs: The machine register state * @@ -304,20 +306,31 @@ void single_step_execve(void) */ void single_step_once(struct pt_regs *regs) { - extern tile_bundle_bits __single_step_ill_insn; - extern tile_bundle_bits __single_step_j_insn; - extern tile_bundle_bits __single_step_addli_insn; - extern tile_bundle_bits __single_step_auli_insn; + extern tilepro_bundle_bits __single_step_ill_insn; + extern tilepro_bundle_bits __single_step_j_insn; + extern tilepro_bundle_bits __single_step_addli_insn; + extern tilepro_bundle_bits __single_step_auli_insn; struct thread_info *info = (void *)current_thread_info(); struct single_step_state *state = info->step_state; int is_single_step = test_ti_thread_flag(info, TIF_SINGLESTEP); - tile_bundle_bits __user *buffer, *pc; - tile_bundle_bits bundle; + tilepro_bundle_bits __user *buffer, *pc; + tilepro_bundle_bits bundle; int temp_reg; int target_reg = TREG_LR; int err; enum mem_op mem_op = MEMOP_NONE; int size = 0, sign_ext = 0; /* happy compiler */ + int align_ctl; + + align_ctl = unaligned_fixup; + switch (task_thread_info(current)->align_ctl) { + case PR_UNALIGN_NOPRINT: + align_ctl = 1; + break; + case PR_UNALIGN_SIGBUS: + align_ctl = 0; + break; + } asm( " .pushsection .rodata.single_step\n" @@ -390,7 +403,7 @@ void single_step_once(struct pt_regs *regs) if (regs->faultnum == INT_SWINT_1) regs->pc -= 8; - pc = (tile_bundle_bits __user *)(regs->pc); + pc = (tilepro_bundle_bits __user *)(regs->pc); if (get_user(bundle, pc) != 0) { pr_err("Couldn't read instruction at %p trying to step\n", pc); return; @@ -533,7 +546,6 @@ void single_step_once(struct pt_regs *regs) } break; -#if CHIP_HAS_WH64() /* postincrement operations */ case IMM_0_OPCODE_X1: switch (get_ImmOpcodeExtension_X1(bundle)) { @@ -568,7 +580,6 @@ void single_step_once(struct pt_regs *regs) break; } break; -#endif /* CHIP_HAS_WH64() */ } if (state->update) { @@ -627,9 +638,9 @@ void single_step_once(struct pt_regs *regs) /* * Check if we need to rewrite an unaligned load/store. - * Returning zero is a special value meaning we need to SIGSEGV. + * Returning zero is a special value meaning we generated a signal. */ - if (mem_op != MEMOP_NONE && unaligned_fixup >= 0) { + if (mem_op != MEMOP_NONE && align_ctl >= 0) { bundle = rewrite_load_store_unaligned(state, bundle, regs, mem_op, size, sign_ext); if (bundle == 0) @@ -668,9 +679,9 @@ void single_step_once(struct pt_regs *regs) } /* End with a jump back to the next instruction */ - delta = ((regs->pc + TILE_BUNDLE_SIZE_IN_BYTES) - + delta = ((regs->pc + TILEPRO_BUNDLE_SIZE_IN_BYTES) - (unsigned long)buffer) >> - TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES; + TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES; bundle = __single_step_j_insn; bundle |= create_JOffLong_X1(delta); err |= __put_user(bundle, buffer++); @@ -698,9 +709,6 @@ void single_step_once(struct pt_regs *regs) } #else -#include <linux/smp.h> -#include <linux/ptrace.h> -#include <arch/spr_def.h> static DEFINE_PER_CPU(unsigned long, ss_saved_pc); @@ -743,10 +751,10 @@ void gx_singlestep_handle(struct pt_regs *regs, int fault_num) } else if ((*ss_pc != regs->pc) || (!(control & SPR_SINGLE_STEP_CONTROL_1__CANCELED_MASK))) { - ptrace_notify(SIGTRAP); control |= SPR_SINGLE_STEP_CONTROL_1__CANCELED_MASK; control |= SPR_SINGLE_STEP_CONTROL_1__INHIBIT_MASK; __insn_mtspr(SPR_SINGLE_STEP_CONTROL_K, control); + send_sigtrap(current, regs); } } diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c index cbc73a8..01e8ab2 100644 --- a/arch/tile/kernel/smp.c +++ b/arch/tile/kernel/smp.c @@ -20,8 +20,13 @@ #include <linux/irq.h> #include <linux/module.h> #include <asm/cacheflush.h> +#include <asm/homecache.h> -HV_Topology smp_topology __write_once; +/* + * We write to width and height with a single store in head_NN.S, + * so make the variable aligned to "long". + */ +HV_Topology smp_topology __write_once __aligned(sizeof(long)); EXPORT_SYMBOL(smp_topology); #if CHIP_HAS_IPI() @@ -100,8 +105,8 @@ static void smp_start_cpu_interrupt(void) /* Handler to stop the current cpu. */ static void smp_stop_cpu_interrupt(void) { - set_cpu_online(smp_processor_id(), 0); arch_local_irq_disable_all(); + set_cpu_online(smp_processor_id(), 0); for (;;) asm("nap; nop"); } @@ -167,9 +172,16 @@ static void ipi_flush_icache_range(void *info) void flush_icache_range(unsigned long start, unsigned long end) { struct ipi_flush flush = { start, end }; - preempt_disable(); - on_each_cpu(ipi_flush_icache_range, &flush, 1); - preempt_enable(); + + /* If invoked with irqs disabled, we can not issue IPIs. */ + if (irqs_disabled()) + flush_remote(0, HV_FLUSH_EVICT_L1I, NULL, 0, 0, 0, + NULL, NULL, 0); + else { + preempt_disable(); + on_each_cpu(ipi_flush_icache_range, &flush, 1); + preempt_enable(); + } } diff --git a/arch/tile/kernel/smpboot.c b/arch/tile/kernel/smpboot.c index a535655..732e9d1 100644 --- a/arch/tile/kernel/smpboot.c +++ b/arch/tile/kernel/smpboot.c @@ -142,13 +142,15 @@ static struct cpumask cpu_started; */ static void start_secondary(void) { - int cpuid = smp_processor_id(); + int cpuid; + + preempt_disable(); + + cpuid = smp_processor_id(); /* Set our thread pointer appropriately. */ set_my_cpu_offset(__per_cpu_offset[cpuid]); - preempt_disable(); - /* * In large machines even this will slow us down, since we * will be contending for for the printk spinlock. diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c index af8dfc9..362284a 100644 --- a/arch/tile/kernel/stack.c +++ b/arch/tile/kernel/stack.c @@ -29,6 +29,7 @@ #include <asm/switch_to.h> #include <asm/sigframe.h> #include <asm/stack.h> +#include <asm/vdso.h> #include <arch/abi.h> #include <arch/interrupts.h> @@ -102,9 +103,8 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt) p->sp >= sp) { if (kbt->verbose) pr_err(" <%s while in kernel mode>\n", fault); - } else if (EX1_PL(p->ex1) == USER_PL && - p->pc < PAGE_OFFSET && - p->sp < PAGE_OFFSET) { + } else if (user_mode(p) && + p->sp < PAGE_OFFSET && p->sp != 0) { if (kbt->verbose) pr_err(" <%s while in user mode>\n", fault); } else if (kbt->verbose) { @@ -120,7 +120,7 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt) /* Is the pc pointing to a sigreturn trampoline? */ static int is_sigreturn(unsigned long pc) { - return (pc == VDSO_BASE); + return current->mm && (pc == VDSO_SYM(&__vdso_rt_sigreturn)); } /* Return a pt_regs pointer for a valid signal handler frame */ @@ -129,7 +129,7 @@ static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt, { BacktraceIterator *b = &kbt->it; - if (b->pc == VDSO_BASE && b->sp < PAGE_OFFSET && + if (is_sigreturn(b->pc) && b->sp < PAGE_OFFSET && b->sp % sizeof(long) == 0) { int retval; pagefault_disable(); @@ -195,21 +195,21 @@ static int KBacktraceIterator_next_item_inclusive( */ static void validate_stack(struct pt_regs *regs) { - int cpu = smp_processor_id(); + int cpu = raw_smp_processor_id(); unsigned long ksp0 = get_current_ksp0(); - unsigned long ksp0_base = ksp0 - THREAD_SIZE; + unsigned long ksp0_base = ksp0 & -THREAD_SIZE; unsigned long sp = stack_pointer; if (EX1_PL(regs->ex1) == KERNEL_PL && regs->sp >= ksp0) { - pr_err("WARNING: cpu %d: kernel stack page %#lx underrun!\n" + pr_err("WARNING: cpu %d: kernel stack %#lx..%#lx underrun!\n" " sp %#lx (%#lx in caller), caller pc %#lx, lr %#lx\n", - cpu, ksp0_base, sp, regs->sp, regs->pc, regs->lr); + cpu, ksp0_base, ksp0, sp, regs->sp, regs->pc, regs->lr); } else if (sp < ksp0_base + sizeof(struct thread_info)) { - pr_err("WARNING: cpu %d: kernel stack page %#lx overrun!\n" + pr_err("WARNING: cpu %d: kernel stack %#lx..%#lx overrun!\n" " sp %#lx (%#lx in caller), caller pc %#lx, lr %#lx\n", - cpu, ksp0_base, sp, regs->sp, regs->pc, regs->lr); + cpu, ksp0_base, ksp0, sp, regs->sp, regs->pc, regs->lr); } } @@ -352,6 +352,26 @@ static void describe_addr(struct KBacktraceIterator *kbt, } /* + * Avoid possible crash recursion during backtrace. If it happens, it + * makes it easy to lose the actual root cause of the failure, so we + * put a simple guard on all the backtrace loops. + */ +static bool start_backtrace(void) +{ + if (current->thread.in_backtrace) { + pr_err("Backtrace requested while in backtrace!\n"); + return false; + } + current->thread.in_backtrace = true; + return true; +} + +static void end_backtrace(void) +{ + current->thread.in_backtrace = false; +} + +/* * This method wraps the backtracer's more generic support. * It is only invoked from the architecture-specific code; show_stack() * and dump_stack() (in entry.S) are architecture-independent entry points. @@ -361,6 +381,8 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers) int i; int have_mmap_sem = 0; + if (!start_backtrace()) + return; if (headers) { /* * Add a blank line since if we are called from panic(), @@ -371,7 +393,7 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers) pr_err("Starting stack dump of tid %d, pid %d (%s)" " on cpu %d at cycle %lld\n", kbt->task->pid, kbt->task->tgid, kbt->task->comm, - smp_processor_id(), get_cycles()); + raw_smp_processor_id(), get_cycles()); } kbt->verbose = 1; i = 0; @@ -402,6 +424,7 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers) pr_err("Stack dump complete\n"); if (have_mmap_sem) up_read(&kbt->task->mm->mmap_sem); + end_backtrace(); } EXPORT_SYMBOL(tile_show_stack); @@ -463,6 +486,8 @@ void save_stack_trace_tsk(struct task_struct *task, struct stack_trace *trace) int skip = trace->skip; int i = 0; + if (!start_backtrace()) + goto done; if (task == NULL || task == current) KBacktraceIterator_init_current(&kbt); else @@ -476,6 +501,8 @@ void save_stack_trace_tsk(struct task_struct *task, struct stack_trace *trace) break; trace->entries[i++] = kbt.it.pc; } + end_backtrace(); +done: trace->nr_entries = i; } EXPORT_SYMBOL(save_stack_trace_tsk); diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c index b881a7be..38debe7 100644 --- a/arch/tile/kernel/sys.c +++ b/arch/tile/kernel/sys.c @@ -38,8 +38,10 @@ SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, unsigned long, flags) { + /* DCACHE is not particularly effective if not bound to one cpu. */ if (flags & DCACHE) - homecache_evict(cpumask_of(smp_processor_id())); + homecache_evict(cpumask_of(raw_smp_processor_id())); + if (flags & ICACHE) flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm), 0, 0, 0, NULL, NULL, 0); diff --git a/arch/tile/kernel/sysfs.c b/arch/tile/kernel/sysfs.c index e25b0a8..a3ed12f 100644 --- a/arch/tile/kernel/sysfs.c +++ b/arch/tile/kernel/sysfs.c @@ -157,6 +157,67 @@ hvconfig_bin_read(struct file *filp, struct kobject *kobj, return count; } +static ssize_t hv_stats_show(struct device *dev, + struct device_attribute *attr, + char *page) +{ + int cpu = dev->id; + long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu)); + + ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS, + (unsigned long)page, PAGE_SIZE - 1, + lotar, 0); + n = n < 0 ? 0 : min(n, (ssize_t)PAGE_SIZE - 1); + page[n] = '\0'; + return n; +} + +static ssize_t hv_stats_store(struct device *dev, + struct device_attribute *attr, + const char *page, + size_t count) +{ + int cpu = dev->id; + long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu)); + + ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS, 0, 0, lotar, 1); + return n < 0 ? n : count; +} + +static DEVICE_ATTR(hv_stats, 0644, hv_stats_show, hv_stats_store); + +static int hv_stats_device_add(struct device *dev, struct subsys_interface *sif) +{ + int err, cpu = dev->id; + + if (!cpu_online(cpu)) + return 0; + + err = sysfs_create_file(&dev->kobj, &dev_attr_hv_stats.attr); + + return err; +} + +static int hv_stats_device_remove(struct device *dev, + struct subsys_interface *sif) +{ + int cpu = dev->id; + + if (!cpu_online(cpu)) + return 0; + + sysfs_remove_file(&dev->kobj, &dev_attr_hv_stats.attr); + return 0; +} + + +static struct subsys_interface hv_stats_interface = { + .name = "hv_stats", + .subsys = &cpu_subsys, + .add_dev = hv_stats_device_add, + .remove_dev = hv_stats_device_remove, +}; + static int __init create_sysfs_entries(void) { int err = 0; @@ -188,6 +249,21 @@ static int __init create_sysfs_entries(void) err = sysfs_create_bin_file(hypervisor_kobj, &hvconfig_bin); } + if (!err) { + /* + * Don't bother adding the hv_stats files on each CPU if + * our hypervisor doesn't supply statistics. + */ + int cpu = raw_smp_processor_id(); + long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu)); + char dummy; + ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS, + (unsigned long) &dummy, 1, + lotar, 0); + if (n >= 0) + err = subsys_interface_register(&hv_stats_interface); + } + return err; } subsys_initcall(create_sysfs_entries); diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c index 7c353d8..5d10642 100644 --- a/arch/tile/kernel/time.c +++ b/arch/tile/kernel/time.c @@ -23,8 +23,10 @@ #include <linux/smp.h> #include <linux/delay.h> #include <linux/module.h> +#include <linux/timekeeper_internal.h> #include <asm/irq_regs.h> #include <asm/traps.h> +#include <asm/vdso.h> #include <hv/hypervisor.h> #include <arch/interrupts.h> #include <arch/spr_def.h> @@ -110,7 +112,6 @@ void __init time_init(void) setup_tile_timer(); } - /* * Define the tile timer clock event device. The timer is driven by * the TILE_TIMER_CONTROL register, which consists of a 31-bit down @@ -237,3 +238,37 @@ cycles_t ns2cycles(unsigned long nsecs) struct clock_event_device *dev = &__raw_get_cpu_var(tile_timer); return ((u64)nsecs * dev->mult) >> dev->shift; } + +void update_vsyscall_tz(void) +{ + /* Userspace gettimeofday will spin while this value is odd. */ + ++vdso_data->tz_update_count; + smp_wmb(); + vdso_data->tz_minuteswest = sys_tz.tz_minuteswest; + vdso_data->tz_dsttime = sys_tz.tz_dsttime; + smp_wmb(); + ++vdso_data->tz_update_count; +} + +void update_vsyscall(struct timekeeper *tk) +{ + struct timespec wall_time = tk_xtime(tk); + struct timespec *wtm = &tk->wall_to_monotonic; + struct clocksource *clock = tk->clock; + + if (clock != &cycle_counter_cs) + return; + + /* Userspace gettimeofday will spin while this value is odd. */ + ++vdso_data->tb_update_count; + smp_wmb(); + vdso_data->xtime_tod_stamp = clock->cycle_last; + vdso_data->xtime_clock_sec = wall_time.tv_sec; + vdso_data->xtime_clock_nsec = wall_time.tv_nsec; + vdso_data->wtom_clock_sec = wtm->tv_sec; + vdso_data->wtom_clock_nsec = wtm->tv_nsec; + vdso_data->mult = clock->mult; + vdso_data->shift = clock->shift; + smp_wmb(); + ++vdso_data->tb_update_count; +} diff --git a/arch/tile/kernel/tlb.c b/arch/tile/kernel/tlb.c index 3fd54d5..f23b535 100644 --- a/arch/tile/kernel/tlb.c +++ b/arch/tile/kernel/tlb.c @@ -91,8 +91,14 @@ void flush_tlb_all(void) } } +/* + * Callers need to flush the L1I themselves if necessary, e.g. for + * kernel module unload. Otherwise we assume callers are not using + * executable pgprot_t's. Using EVICT_L1I means that dataplane cpus + * will get an unnecessary interrupt otherwise. + */ void flush_tlb_kernel_range(unsigned long start, unsigned long end) { - flush_remote(0, HV_FLUSH_EVICT_L1I, cpu_online_mask, + flush_remote(0, 0, NULL, start, end - start, PAGE_SIZE, cpu_online_mask, NULL, 0); } diff --git a/arch/tile/kernel/traps.c b/arch/tile/kernel/traps.c index 5b19a23..6b603d5 100644 --- a/arch/tile/kernel/traps.c +++ b/arch/tile/kernel/traps.c @@ -15,6 +15,7 @@ #include <linux/sched.h> #include <linux/kernel.h> #include <linux/kprobes.h> +#include <linux/kdebug.h> #include <linux/module.h> #include <linux/reboot.h> #include <linux/uaccess.h> @@ -29,7 +30,7 @@ void __init trap_init(void) { - /* Nothing needed here since we link code at .intrpt1 */ + /* Nothing needed here since we link code at .intrpt */ } int unaligned_fixup = 1; @@ -100,13 +101,7 @@ static int retry_gpv(unsigned int gpv_reason) #endif /* CHIP_HAS_TILE_DMA() */ -#ifdef __tilegx__ -#define bundle_bits tilegx_bundle_bits -#else -#define bundle_bits tile_bundle_bits -#endif - -extern bundle_bits bpt_code; +extern tile_bundle_bits bpt_code; asm(".pushsection .rodata.bpt_code,\"a\";" ".align 8;" @@ -114,7 +109,7 @@ asm(".pushsection .rodata.bpt_code,\"a\";" ".size bpt_code,.-bpt_code;" ".popsection"); -static int special_ill(bundle_bits bundle, int *sigp, int *codep) +static int special_ill(tile_bundle_bits bundle, int *sigp, int *codep) { int sig, code, maxcode; @@ -214,24 +209,73 @@ static const char *const int_name[] = { #endif }; +static int do_bpt(struct pt_regs *regs) +{ + unsigned long bundle, bcode, bpt; + + bundle = *(unsigned long *)instruction_pointer(regs); + + /* + * bpt shoule be { bpt; nop }, which is 0x286a44ae51485000ULL. + * we encode the unused least significant bits for other purpose. + */ + bpt = bundle & ~((1ULL << 12) - 1); + if (bpt != TILE_BPT_BUNDLE) + return 0; + + bcode = bundle & ((1ULL << 12) - 1); + /* + * notify the kprobe handlers, if instruction is likely to + * pertain to them. + */ + switch (bcode) { + /* breakpoint_insn */ + case 0: + notify_die(DIE_BREAK, "debug", regs, bundle, + INT_ILL, SIGTRAP); + break; + /* compiled_bpt */ + case DIE_COMPILED_BPT: + notify_die(DIE_COMPILED_BPT, "debug", regs, bundle, + INT_ILL, SIGTRAP); + break; + /* breakpoint2_insn */ + case DIE_SSTEPBP: + notify_die(DIE_SSTEPBP, "single_step", regs, bundle, + INT_ILL, SIGTRAP); + break; + default: + return 0; + } + + return 1; +} + void __kprobes do_trap(struct pt_regs *regs, int fault_num, unsigned long reason) { siginfo_t info = { 0 }; int signo, code; unsigned long address = 0; - bundle_bits instr; + tile_bundle_bits instr; + int is_kernel = !user_mode(regs); + + /* Handle breakpoints, etc. */ + if (is_kernel && fault_num == INT_ILL && do_bpt(regs)) + return; - /* Re-enable interrupts. */ - local_irq_enable(); + /* Re-enable interrupts, if they were previously enabled. */ + if (!(regs->flags & PT_FLAGS_DISABLE_IRQ)) + local_irq_enable(); /* * If it hits in kernel mode and we can't fix it up, just exit the * current process and hope for the best. */ - if (!user_mode(regs)) { + if (is_kernel) { const char *name; - if (fixup_exception(regs)) /* only UNALIGN_DATA in practice */ + char buf[100]; + if (fixup_exception(regs)) /* ILL_TRANS or UNALIGN_DATA */ return; if (fault_num >= 0 && fault_num < sizeof(int_name)/sizeof(int_name[0]) && @@ -239,10 +283,16 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num, name = int_name[fault_num]; else name = "Unknown interrupt"; - pr_alert("Kernel took bad trap %d (%s) at PC %#lx\n", - fault_num, name, regs->pc); if (fault_num == INT_GPV) - pr_alert("GPV_REASON is %#lx\n", reason); + snprintf(buf, sizeof(buf), "; GPV_REASON %#lx", reason); +#ifdef __tilegx__ + else if (fault_num == INT_ILL_TRANS) + snprintf(buf, sizeof(buf), "; address %#lx", reason); +#endif + else + buf[0] = '\0'; + pr_alert("Kernel took bad trap %d (%s) at PC %#lx%s\n", + fault_num, name, regs->pc, buf); show_regs(regs); do_exit(SIGKILL); /* FIXME: implement i386 die() */ return; @@ -324,11 +374,8 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num, fill_ra_stack(); signo = SIGSEGV; + address = reason; code = SEGV_MAPERR; - if (reason & SPR_ILL_TRANS_REASON__I_STREAM_VA_RMASK) - address = regs->pc; - else - address = 0; /* FIXME: GX: single-step for address */ break; } #endif diff --git a/arch/tile/kernel/unaligned.c b/arch/tile/kernel/unaligned.c new file mode 100644 index 0000000..b425fb6 --- /dev/null +++ b/arch/tile/kernel/unaligned.c @@ -0,0 +1,1609 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * A code-rewriter that handles unaligned exception. + */ + +#include <linux/smp.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/thread_info.h> +#include <linux/uaccess.h> +#include <linux/mman.h> +#include <linux/types.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/compat.h> +#include <linux/prctl.h> +#include <asm/cacheflush.h> +#include <asm/traps.h> +#include <asm/uaccess.h> +#include <asm/unaligned.h> +#include <arch/abi.h> +#include <arch/spr_def.h> +#include <arch/opcode.h> + + +/* + * This file handles unaligned exception for tile-Gx. The tilepro's unaligned + * exception is supported out of single_step.c + */ + +int unaligned_printk; + +static int __init setup_unaligned_printk(char *str) +{ + long val; + if (kstrtol(str, 0, &val) != 0) + return 0; + unaligned_printk = val; + pr_info("Printk for each unaligned data accesses is %s\n", + unaligned_printk ? "enabled" : "disabled"); + return 1; +} +__setup("unaligned_printk=", setup_unaligned_printk); + +unsigned int unaligned_fixup_count; + +#ifdef __tilegx__ + +/* + * Unalign data jit fixup code fragement. Reserved space is 128 bytes. + * The 1st 64-bit word saves fault PC address, 2nd word is the fault + * instruction bundle followed by 14 JIT bundles. + */ + +struct unaligned_jit_fragment { + unsigned long pc; + tilegx_bundle_bits bundle; + tilegx_bundle_bits insn[14]; +}; + +/* + * Check if a nop or fnop at bundle's pipeline X0. + */ + +static bool is_bundle_x0_nop(tilegx_bundle_bits bundle) +{ + return (((get_UnaryOpcodeExtension_X0(bundle) == + NOP_UNARY_OPCODE_X0) && + (get_RRROpcodeExtension_X0(bundle) == + UNARY_RRR_0_OPCODE_X0) && + (get_Opcode_X0(bundle) == + RRR_0_OPCODE_X0)) || + ((get_UnaryOpcodeExtension_X0(bundle) == + FNOP_UNARY_OPCODE_X0) && + (get_RRROpcodeExtension_X0(bundle) == + UNARY_RRR_0_OPCODE_X0) && + (get_Opcode_X0(bundle) == + RRR_0_OPCODE_X0))); +} + +/* + * Check if nop or fnop at bundle's pipeline X1. + */ + +static bool is_bundle_x1_nop(tilegx_bundle_bits bundle) +{ + return (((get_UnaryOpcodeExtension_X1(bundle) == + NOP_UNARY_OPCODE_X1) && + (get_RRROpcodeExtension_X1(bundle) == + UNARY_RRR_0_OPCODE_X1) && + (get_Opcode_X1(bundle) == + RRR_0_OPCODE_X1)) || + ((get_UnaryOpcodeExtension_X1(bundle) == + FNOP_UNARY_OPCODE_X1) && + (get_RRROpcodeExtension_X1(bundle) == + UNARY_RRR_0_OPCODE_X1) && + (get_Opcode_X1(bundle) == + RRR_0_OPCODE_X1))); +} + +/* + * Check if nop or fnop at bundle's Y0 pipeline. + */ + +static bool is_bundle_y0_nop(tilegx_bundle_bits bundle) +{ + return (((get_UnaryOpcodeExtension_Y0(bundle) == + NOP_UNARY_OPCODE_Y0) && + (get_RRROpcodeExtension_Y0(bundle) == + UNARY_RRR_1_OPCODE_Y0) && + (get_Opcode_Y0(bundle) == + RRR_1_OPCODE_Y0)) || + ((get_UnaryOpcodeExtension_Y0(bundle) == + FNOP_UNARY_OPCODE_Y0) && + (get_RRROpcodeExtension_Y0(bundle) == + UNARY_RRR_1_OPCODE_Y0) && + (get_Opcode_Y0(bundle) == + RRR_1_OPCODE_Y0))); +} + +/* + * Check if nop or fnop at bundle's pipeline Y1. + */ + +static bool is_bundle_y1_nop(tilegx_bundle_bits bundle) +{ + return (((get_UnaryOpcodeExtension_Y1(bundle) == + NOP_UNARY_OPCODE_Y1) && + (get_RRROpcodeExtension_Y1(bundle) == + UNARY_RRR_1_OPCODE_Y1) && + (get_Opcode_Y1(bundle) == + RRR_1_OPCODE_Y1)) || + ((get_UnaryOpcodeExtension_Y1(bundle) == + FNOP_UNARY_OPCODE_Y1) && + (get_RRROpcodeExtension_Y1(bundle) == + UNARY_RRR_1_OPCODE_Y1) && + (get_Opcode_Y1(bundle) == + RRR_1_OPCODE_Y1))); +} + +/* + * Test if a bundle's y0 and y1 pipelines are both nop or fnop. + */ + +static bool is_y0_y1_nop(tilegx_bundle_bits bundle) +{ + return is_bundle_y0_nop(bundle) && is_bundle_y1_nop(bundle); +} + +/* + * Test if a bundle's x0 and x1 pipelines are both nop or fnop. + */ + +static bool is_x0_x1_nop(tilegx_bundle_bits bundle) +{ + return is_bundle_x0_nop(bundle) && is_bundle_x1_nop(bundle); +} + +/* + * Find the destination, source registers of fault unalign access instruction + * at X1 or Y2. Also, allocate up to 3 scratch registers clob1, clob2 and + * clob3, which are guaranteed different from any register used in the fault + * bundle. r_alias is used to return if the other instructions other than the + * unalign load/store shares same register with ra, rb and rd. + */ + +static void find_regs(tilegx_bundle_bits bundle, uint64_t *rd, uint64_t *ra, + uint64_t *rb, uint64_t *clob1, uint64_t *clob2, + uint64_t *clob3, bool *r_alias) +{ + int i; + uint64_t reg; + uint64_t reg_map = 0, alias_reg_map = 0, map; + bool alias; + + *ra = -1; + *rb = -1; + + if (rd) + *rd = -1; + + *clob1 = -1; + *clob2 = -1; + *clob3 = -1; + alias = false; + + /* + * Parse fault bundle, find potential used registers and mark + * corresponding bits in reg_map and alias_map. These 2 bit maps + * are used to find the scratch registers and determine if there + * is register alais. + */ + if (bundle & TILEGX_BUNDLE_MODE_MASK) { /* Y Mode Bundle. */ + + reg = get_SrcA_Y2(bundle); + reg_map |= 1ULL << reg; + *ra = reg; + reg = get_SrcBDest_Y2(bundle); + reg_map |= 1ULL << reg; + + if (rd) { + /* Load. */ + *rd = reg; + alias_reg_map = (1ULL << *rd) | (1ULL << *ra); + } else { + /* Store. */ + *rb = reg; + alias_reg_map = (1ULL << *ra) | (1ULL << *rb); + } + + if (!is_bundle_y1_nop(bundle)) { + reg = get_SrcA_Y1(bundle); + reg_map |= (1ULL << reg); + map = (1ULL << reg); + + reg = get_SrcB_Y1(bundle); + reg_map |= (1ULL << reg); + map |= (1ULL << reg); + + reg = get_Dest_Y1(bundle); + reg_map |= (1ULL << reg); + map |= (1ULL << reg); + + if (map & alias_reg_map) + alias = true; + } + + if (!is_bundle_y0_nop(bundle)) { + reg = get_SrcA_Y0(bundle); + reg_map |= (1ULL << reg); + map = (1ULL << reg); + + reg = get_SrcB_Y0(bundle); + reg_map |= (1ULL << reg); + map |= (1ULL << reg); + + reg = get_Dest_Y0(bundle); + reg_map |= (1ULL << reg); + map |= (1ULL << reg); + + if (map & alias_reg_map) + alias = true; + } + } else { /* X Mode Bundle. */ + + reg = get_SrcA_X1(bundle); + reg_map |= (1ULL << reg); + *ra = reg; + if (rd) { + /* Load. */ + reg = get_Dest_X1(bundle); + reg_map |= (1ULL << reg); + *rd = reg; + alias_reg_map = (1ULL << *rd) | (1ULL << *ra); + } else { + /* Store. */ + reg = get_SrcB_X1(bundle); + reg_map |= (1ULL << reg); + *rb = reg; + alias_reg_map = (1ULL << *ra) | (1ULL << *rb); + } + + if (!is_bundle_x0_nop(bundle)) { + reg = get_SrcA_X0(bundle); + reg_map |= (1ULL << reg); + map = (1ULL << reg); + + reg = get_SrcB_X0(bundle); + reg_map |= (1ULL << reg); + map |= (1ULL << reg); + + reg = get_Dest_X0(bundle); + reg_map |= (1ULL << reg); + map |= (1ULL << reg); + + if (map & alias_reg_map) + alias = true; + } + } + + /* + * "alias" indicates if the unalign access registers have collision + * with others in the same bundle. We jsut simply test all register + * operands case (RRR), ignored the case with immidate. If a bundle + * has no register alias, we may do fixup in a simple or fast manner. + * So if an immidata field happens to hit with a register, we may end + * up fall back to the generic handling. + */ + + *r_alias = alias; + + /* Flip bits on reg_map. */ + reg_map ^= -1ULL; + + /* Scan reg_map lower 54(TREG_SP) bits to find 3 set bits. */ + for (i = 0; i < TREG_SP; i++) { + if (reg_map & (0x1ULL << i)) { + if (*clob1 == -1) { + *clob1 = i; + } else if (*clob2 == -1) { + *clob2 = i; + } else if (*clob3 == -1) { + *clob3 = i; + return; + } + } + } +} + +/* + * Sanity check for register ra, rb, rd, clob1/2/3. Return true if any of them + * is unexpected. + */ + +static bool check_regs(uint64_t rd, uint64_t ra, uint64_t rb, + uint64_t clob1, uint64_t clob2, uint64_t clob3) +{ + bool unexpected = false; + if ((ra >= 56) && (ra != TREG_ZERO)) + unexpected = true; + + if ((clob1 >= 56) || (clob2 >= 56) || (clob3 >= 56)) + unexpected = true; + + if (rd != -1) { + if ((rd >= 56) && (rd != TREG_ZERO)) + unexpected = true; + } else { + if ((rb >= 56) && (rb != TREG_ZERO)) + unexpected = true; + } + return unexpected; +} + + +#define GX_INSN_X0_MASK ((1ULL << 31) - 1) +#define GX_INSN_X1_MASK (((1ULL << 31) - 1) << 31) +#define GX_INSN_Y0_MASK ((0xFULL << 27) | (0xFFFFFULL)) +#define GX_INSN_Y1_MASK (GX_INSN_Y0_MASK << 31) +#define GX_INSN_Y2_MASK ((0x7FULL << 51) | (0x7FULL << 20)) + +#ifdef __LITTLE_ENDIAN +#define GX_INSN_BSWAP(_bundle_) (_bundle_) +#else +#define GX_INSN_BSWAP(_bundle_) swab64(_bundle_) +#endif /* __LITTLE_ENDIAN */ + +/* + * __JIT_CODE(.) creates template bundles in .rodata.unalign_data section. + * The corresponding static function jix_x#_###(.) generates partial or + * whole bundle based on the template and given arguments. + */ + +#define __JIT_CODE(_X_) \ + asm (".pushsection .rodata.unalign_data, \"a\"\n" \ + _X_"\n" \ + ".popsection\n") + +__JIT_CODE("__unalign_jit_x1_mtspr: {mtspr 0, r0}"); +static tilegx_bundle_bits jit_x1_mtspr(int spr, int reg) +{ + extern tilegx_bundle_bits __unalign_jit_x1_mtspr; + return (GX_INSN_BSWAP(__unalign_jit_x1_mtspr) & GX_INSN_X1_MASK) | + create_MT_Imm14_X1(spr) | create_SrcA_X1(reg); +} + +__JIT_CODE("__unalign_jit_x1_mfspr: {mfspr r0, 0}"); +static tilegx_bundle_bits jit_x1_mfspr(int reg, int spr) +{ + extern tilegx_bundle_bits __unalign_jit_x1_mfspr; + return (GX_INSN_BSWAP(__unalign_jit_x1_mfspr) & GX_INSN_X1_MASK) | + create_MF_Imm14_X1(spr) | create_Dest_X1(reg); +} + +__JIT_CODE("__unalign_jit_x0_addi: {addi r0, r0, 0; iret}"); +static tilegx_bundle_bits jit_x0_addi(int rd, int ra, int imm8) +{ + extern tilegx_bundle_bits __unalign_jit_x0_addi; + return (GX_INSN_BSWAP(__unalign_jit_x0_addi) & GX_INSN_X0_MASK) | + create_Dest_X0(rd) | create_SrcA_X0(ra) | + create_Imm8_X0(imm8); +} + +__JIT_CODE("__unalign_jit_x1_ldna: {ldna r0, r0}"); +static tilegx_bundle_bits jit_x1_ldna(int rd, int ra) +{ + extern tilegx_bundle_bits __unalign_jit_x1_ldna; + return (GX_INSN_BSWAP(__unalign_jit_x1_ldna) & GX_INSN_X1_MASK) | + create_Dest_X1(rd) | create_SrcA_X1(ra); +} + +__JIT_CODE("__unalign_jit_x0_dblalign: {dblalign r0, r0 ,r0}"); +static tilegx_bundle_bits jit_x0_dblalign(int rd, int ra, int rb) +{ + extern tilegx_bundle_bits __unalign_jit_x0_dblalign; + return (GX_INSN_BSWAP(__unalign_jit_x0_dblalign) & GX_INSN_X0_MASK) | + create_Dest_X0(rd) | create_SrcA_X0(ra) | + create_SrcB_X0(rb); +} + +__JIT_CODE("__unalign_jit_x1_iret: {iret}"); +static tilegx_bundle_bits jit_x1_iret(void) +{ + extern tilegx_bundle_bits __unalign_jit_x1_iret; + return GX_INSN_BSWAP(__unalign_jit_x1_iret) & GX_INSN_X1_MASK; +} + +__JIT_CODE("__unalign_jit_x01_fnop: {fnop;fnop}"); +static tilegx_bundle_bits jit_x0_fnop(void) +{ + extern tilegx_bundle_bits __unalign_jit_x01_fnop; + return GX_INSN_BSWAP(__unalign_jit_x01_fnop) & GX_INSN_X0_MASK; +} + +static tilegx_bundle_bits jit_x1_fnop(void) +{ + extern tilegx_bundle_bits __unalign_jit_x01_fnop; + return GX_INSN_BSWAP(__unalign_jit_x01_fnop) & GX_INSN_X1_MASK; +} + +__JIT_CODE("__unalign_jit_y2_dummy: {fnop; fnop; ld zero, sp}"); +static tilegx_bundle_bits jit_y2_dummy(void) +{ + extern tilegx_bundle_bits __unalign_jit_y2_dummy; + return GX_INSN_BSWAP(__unalign_jit_y2_dummy) & GX_INSN_Y2_MASK; +} + +static tilegx_bundle_bits jit_y1_fnop(void) +{ + extern tilegx_bundle_bits __unalign_jit_y2_dummy; + return GX_INSN_BSWAP(__unalign_jit_y2_dummy) & GX_INSN_Y1_MASK; +} + +__JIT_CODE("__unalign_jit_x1_st1_add: {st1_add r1, r0, 0}"); +static tilegx_bundle_bits jit_x1_st1_add(int ra, int rb, int imm8) +{ + extern tilegx_bundle_bits __unalign_jit_x1_st1_add; + return (GX_INSN_BSWAP(__unalign_jit_x1_st1_add) & + (~create_SrcA_X1(-1)) & + GX_INSN_X1_MASK) | create_SrcA_X1(ra) | + create_SrcB_X1(rb) | create_Dest_Imm8_X1(imm8); +} + +__JIT_CODE("__unalign_jit_x1_st: {crc32_8 r1, r0, r0; st r0, r0}"); +static tilegx_bundle_bits jit_x1_st(int ra, int rb) +{ + extern tilegx_bundle_bits __unalign_jit_x1_st; + return (GX_INSN_BSWAP(__unalign_jit_x1_st) & GX_INSN_X1_MASK) | + create_SrcA_X1(ra) | create_SrcB_X1(rb); +} + +__JIT_CODE("__unalign_jit_x1_st_add: {st_add r1, r0, 0}"); +static tilegx_bundle_bits jit_x1_st_add(int ra, int rb, int imm8) +{ + extern tilegx_bundle_bits __unalign_jit_x1_st_add; + return (GX_INSN_BSWAP(__unalign_jit_x1_st_add) & + (~create_SrcA_X1(-1)) & + GX_INSN_X1_MASK) | create_SrcA_X1(ra) | + create_SrcB_X1(rb) | create_Dest_Imm8_X1(imm8); +} + +__JIT_CODE("__unalign_jit_x1_ld: {crc32_8 r1, r0, r0; ld r0, r0}"); +static tilegx_bundle_bits jit_x1_ld(int rd, int ra) +{ + extern tilegx_bundle_bits __unalign_jit_x1_ld; + return (GX_INSN_BSWAP(__unalign_jit_x1_ld) & GX_INSN_X1_MASK) | + create_Dest_X1(rd) | create_SrcA_X1(ra); +} + +__JIT_CODE("__unalign_jit_x1_ld_add: {ld_add r1, r0, 0}"); +static tilegx_bundle_bits jit_x1_ld_add(int rd, int ra, int imm8) +{ + extern tilegx_bundle_bits __unalign_jit_x1_ld_add; + return (GX_INSN_BSWAP(__unalign_jit_x1_ld_add) & + (~create_Dest_X1(-1)) & + GX_INSN_X1_MASK) | create_Dest_X1(rd) | + create_SrcA_X1(ra) | create_Imm8_X1(imm8); +} + +__JIT_CODE("__unalign_jit_x0_bfexts: {bfexts r0, r0, 0, 0}"); +static tilegx_bundle_bits jit_x0_bfexts(int rd, int ra, int bfs, int bfe) +{ + extern tilegx_bundle_bits __unalign_jit_x0_bfexts; + return (GX_INSN_BSWAP(__unalign_jit_x0_bfexts) & + GX_INSN_X0_MASK) | + create_Dest_X0(rd) | create_SrcA_X0(ra) | + create_BFStart_X0(bfs) | create_BFEnd_X0(bfe); +} + +__JIT_CODE("__unalign_jit_x0_bfextu: {bfextu r0, r0, 0, 0}"); +static tilegx_bundle_bits jit_x0_bfextu(int rd, int ra, int bfs, int bfe) +{ + extern tilegx_bundle_bits __unalign_jit_x0_bfextu; + return (GX_INSN_BSWAP(__unalign_jit_x0_bfextu) & + GX_INSN_X0_MASK) | + create_Dest_X0(rd) | create_SrcA_X0(ra) | + create_BFStart_X0(bfs) | create_BFEnd_X0(bfe); +} + +__JIT_CODE("__unalign_jit_x1_addi: {bfextu r1, r1, 0, 0; addi r0, r0, 0}"); +static tilegx_bundle_bits jit_x1_addi(int rd, int ra, int imm8) +{ + extern tilegx_bundle_bits __unalign_jit_x1_addi; + return (GX_INSN_BSWAP(__unalign_jit_x1_addi) & GX_INSN_X1_MASK) | + create_Dest_X1(rd) | create_SrcA_X1(ra) | + create_Imm8_X1(imm8); +} + +__JIT_CODE("__unalign_jit_x0_shrui: {shrui r0, r0, 0; iret}"); +static tilegx_bundle_bits jit_x0_shrui(int rd, int ra, int imm6) +{ + extern tilegx_bundle_bits __unalign_jit_x0_shrui; + return (GX_INSN_BSWAP(__unalign_jit_x0_shrui) & + GX_INSN_X0_MASK) | + create_Dest_X0(rd) | create_SrcA_X0(ra) | + create_ShAmt_X0(imm6); +} + +__JIT_CODE("__unalign_jit_x0_rotli: {rotli r0, r0, 0; iret}"); +static tilegx_bundle_bits jit_x0_rotli(int rd, int ra, int imm6) +{ + extern tilegx_bundle_bits __unalign_jit_x0_rotli; + return (GX_INSN_BSWAP(__unalign_jit_x0_rotli) & + GX_INSN_X0_MASK) | + create_Dest_X0(rd) | create_SrcA_X0(ra) | + create_ShAmt_X0(imm6); +} + +__JIT_CODE("__unalign_jit_x1_bnezt: {bnezt r0, __unalign_jit_x1_bnezt}"); +static tilegx_bundle_bits jit_x1_bnezt(int ra, int broff) +{ + extern tilegx_bundle_bits __unalign_jit_x1_bnezt; + return (GX_INSN_BSWAP(__unalign_jit_x1_bnezt) & + GX_INSN_X1_MASK) | + create_SrcA_X1(ra) | create_BrOff_X1(broff); +} + +#undef __JIT_CODE + +/* + * This function generates unalign fixup JIT. + * + * We fist find unalign load/store instruction's destination, source + * reguisters: ra, rb and rd. and 3 scratch registers by calling + * find_regs(...). 3 scratch clobbers should not alias with any register + * used in the fault bundle. Then analyze the fault bundle to determine + * if it's a load or store, operand width, branch or address increment etc. + * At last generated JIT is copied into JIT code area in user space. + */ + +static +void jit_bundle_gen(struct pt_regs *regs, tilegx_bundle_bits bundle, + int align_ctl) +{ + struct thread_info *info = current_thread_info(); + struct unaligned_jit_fragment frag; + struct unaligned_jit_fragment *jit_code_area; + tilegx_bundle_bits bundle_2 = 0; + /* If bundle_2_enable = false, bundle_2 is fnop/nop operation. */ + bool bundle_2_enable = true; + uint64_t ra, rb, rd = -1, clob1, clob2, clob3; + /* + * Indicate if the unalign access + * instruction's registers hit with + * others in the same bundle. + */ + bool alias = false; + bool load_n_store = true; + bool load_store_signed = false; + unsigned int load_store_size = 8; + bool y1_br = false; /* True, for a branch in same bundle at Y1.*/ + int y1_br_reg = 0; + /* True for link operation. i.e. jalr or lnk at Y1 */ + bool y1_lr = false; + int y1_lr_reg = 0; + bool x1_add = false;/* True, for load/store ADD instruction at X1*/ + int x1_add_imm8 = 0; + bool unexpected = false; + int n = 0, k; + + jit_code_area = + (struct unaligned_jit_fragment *)(info->unalign_jit_base); + + memset((void *)&frag, 0, sizeof(frag)); + + /* 0: X mode, Otherwise: Y mode. */ + if (bundle & TILEGX_BUNDLE_MODE_MASK) { + unsigned int mod, opcode; + + if (get_Opcode_Y1(bundle) == RRR_1_OPCODE_Y1 && + get_RRROpcodeExtension_Y1(bundle) == + UNARY_RRR_1_OPCODE_Y1) { + + opcode = get_UnaryOpcodeExtension_Y1(bundle); + + /* + * Test "jalr", "jalrp", "jr", "jrp" instruction at Y1 + * pipeline. + */ + switch (opcode) { + case JALR_UNARY_OPCODE_Y1: + case JALRP_UNARY_OPCODE_Y1: + y1_lr = true; + y1_lr_reg = 55; /* Link register. */ + /* FALLTHROUGH */ + case JR_UNARY_OPCODE_Y1: + case JRP_UNARY_OPCODE_Y1: + y1_br = true; + y1_br_reg = get_SrcA_Y1(bundle); + break; + case LNK_UNARY_OPCODE_Y1: + /* "lnk" at Y1 pipeline. */ + y1_lr = true; + y1_lr_reg = get_Dest_Y1(bundle); + break; + } + } + + opcode = get_Opcode_Y2(bundle); + mod = get_Mode(bundle); + + /* + * bundle_2 is bundle after making Y2 as a dummy operation + * - ld zero, sp + */ + bundle_2 = (bundle & (~GX_INSN_Y2_MASK)) | jit_y2_dummy(); + + /* Make Y1 as fnop if Y1 is a branch or lnk operation. */ + if (y1_br || y1_lr) { + bundle_2 &= ~(GX_INSN_Y1_MASK); + bundle_2 |= jit_y1_fnop(); + } + + if (is_y0_y1_nop(bundle_2)) + bundle_2_enable = false; + + if (mod == MODE_OPCODE_YC2) { + /* Store. */ + load_n_store = false; + load_store_size = 1 << opcode; + load_store_signed = false; + find_regs(bundle, 0, &ra, &rb, &clob1, &clob2, + &clob3, &alias); + if (load_store_size > 8) + unexpected = true; + } else { + /* Load. */ + load_n_store = true; + if (mod == MODE_OPCODE_YB2) { + switch (opcode) { + case LD_OPCODE_Y2: + load_store_signed = false; + load_store_size = 8; + break; + case LD4S_OPCODE_Y2: + load_store_signed = true; + load_store_size = 4; + break; + case LD4U_OPCODE_Y2: + load_store_signed = false; + load_store_size = 4; + break; + default: + unexpected = true; + } + } else if (mod == MODE_OPCODE_YA2) { + if (opcode == LD2S_OPCODE_Y2) { + load_store_signed = true; + load_store_size = 2; + } else if (opcode == LD2U_OPCODE_Y2) { + load_store_signed = false; + load_store_size = 2; + } else + unexpected = true; + } else + unexpected = true; + find_regs(bundle, &rd, &ra, &rb, &clob1, &clob2, + &clob3, &alias); + } + } else { + unsigned int opcode; + + /* bundle_2 is bundle after making X1 as "fnop". */ + bundle_2 = (bundle & (~GX_INSN_X1_MASK)) | jit_x1_fnop(); + + if (is_x0_x1_nop(bundle_2)) + bundle_2_enable = false; + + if (get_Opcode_X1(bundle) == RRR_0_OPCODE_X1) { + opcode = get_UnaryOpcodeExtension_X1(bundle); + + if (get_RRROpcodeExtension_X1(bundle) == + UNARY_RRR_0_OPCODE_X1) { + load_n_store = true; + find_regs(bundle, &rd, &ra, &rb, &clob1, + &clob2, &clob3, &alias); + + switch (opcode) { + case LD_UNARY_OPCODE_X1: + load_store_signed = false; + load_store_size = 8; + break; + case LD4S_UNARY_OPCODE_X1: + load_store_signed = true; + /* FALLTHROUGH */ + case LD4U_UNARY_OPCODE_X1: + load_store_size = 4; + break; + + case LD2S_UNARY_OPCODE_X1: + load_store_signed = true; + /* FALLTHROUGH */ + case LD2U_UNARY_OPCODE_X1: + load_store_size = 2; + break; + default: + unexpected = true; + } + } else { + load_n_store = false; + load_store_signed = false; + find_regs(bundle, 0, &ra, &rb, + &clob1, &clob2, &clob3, + &alias); + + opcode = get_RRROpcodeExtension_X1(bundle); + switch (opcode) { + case ST_RRR_0_OPCODE_X1: + load_store_size = 8; + break; + case ST4_RRR_0_OPCODE_X1: + load_store_size = 4; + break; + case ST2_RRR_0_OPCODE_X1: + load_store_size = 2; + break; + default: + unexpected = true; + } + } + } else if (get_Opcode_X1(bundle) == IMM8_OPCODE_X1) { + load_n_store = true; + opcode = get_Imm8OpcodeExtension_X1(bundle); + switch (opcode) { + case LD_ADD_IMM8_OPCODE_X1: + load_store_size = 8; + break; + + case LD4S_ADD_IMM8_OPCODE_X1: + load_store_signed = true; + /* FALLTHROUGH */ + case LD4U_ADD_IMM8_OPCODE_X1: + load_store_size = 4; + break; + + case LD2S_ADD_IMM8_OPCODE_X1: + load_store_signed = true; + /* FALLTHROUGH */ + case LD2U_ADD_IMM8_OPCODE_X1: + load_store_size = 2; + break; + + case ST_ADD_IMM8_OPCODE_X1: + load_n_store = false; + load_store_size = 8; + break; + case ST4_ADD_IMM8_OPCODE_X1: + load_n_store = false; + load_store_size = 4; + break; + case ST2_ADD_IMM8_OPCODE_X1: + load_n_store = false; + load_store_size = 2; + break; + default: + unexpected = true; + } + + if (!unexpected) { + x1_add = true; + if (load_n_store) + x1_add_imm8 = get_Imm8_X1(bundle); + else + x1_add_imm8 = get_Dest_Imm8_X1(bundle); + } + + find_regs(bundle, load_n_store ? (&rd) : NULL, + &ra, &rb, &clob1, &clob2, &clob3, &alias); + } else + unexpected = true; + } + + /* + * Some sanity check for register numbers extracted from fault bundle. + */ + if (check_regs(rd, ra, rb, clob1, clob2, clob3) == true) + unexpected = true; + + /* Give warning if register ra has an aligned address. */ + if (!unexpected) + WARN_ON(!((load_store_size - 1) & (regs->regs[ra]))); + + + /* + * Fault came from kernel space, here we only need take care of + * unaligned "get_user/put_user" macros defined in "uaccess.h". + * Basically, we will handle bundle like this: + * {ld/2u/4s rd, ra; movei rx, 0} or {st/2/4 ra, rb; movei rx, 0} + * (Refer to file "arch/tile/include/asm/uaccess.h" for details). + * For either load or store, byte-wise operation is performed by calling + * get_user() or put_user(). If the macro returns non-zero value, + * set the value to rx, otherwise set zero to rx. Finally make pc point + * to next bundle and return. + */ + + if (EX1_PL(regs->ex1) != USER_PL) { + + unsigned long rx = 0; + unsigned long x = 0, ret = 0; + + if (y1_br || y1_lr || x1_add || + (load_store_signed != + (load_n_store && load_store_size == 4))) { + /* No branch, link, wrong sign-ext or load/store add. */ + unexpected = true; + } else if (!unexpected) { + if (bundle & TILEGX_BUNDLE_MODE_MASK) { + /* + * Fault bundle is Y mode. + * Check if the Y1 and Y0 is the form of + * { movei rx, 0; nop/fnop }, if yes, + * find the rx. + */ + + if ((get_Opcode_Y1(bundle) == ADDI_OPCODE_Y1) + && (get_SrcA_Y1(bundle) == TREG_ZERO) && + (get_Imm8_Y1(bundle) == 0) && + is_bundle_y0_nop(bundle)) { + rx = get_Dest_Y1(bundle); + } else if ((get_Opcode_Y0(bundle) == + ADDI_OPCODE_Y0) && + (get_SrcA_Y0(bundle) == TREG_ZERO) && + (get_Imm8_Y0(bundle) == 0) && + is_bundle_y1_nop(bundle)) { + rx = get_Dest_Y0(bundle); + } else { + unexpected = true; + } + } else { + /* + * Fault bundle is X mode. + * Check if the X0 is 'movei rx, 0', + * if yes, find the rx. + */ + + if ((get_Opcode_X0(bundle) == IMM8_OPCODE_X0) + && (get_Imm8OpcodeExtension_X0(bundle) == + ADDI_IMM8_OPCODE_X0) && + (get_SrcA_X0(bundle) == TREG_ZERO) && + (get_Imm8_X0(bundle) == 0)) { + rx = get_Dest_X0(bundle); + } else { + unexpected = true; + } + } + + /* rx should be less than 56. */ + if (!unexpected && (rx >= 56)) + unexpected = true; + } + + if (!search_exception_tables(regs->pc)) { + /* No fixup in the exception tables for the pc. */ + unexpected = true; + } + + if (unexpected) { + /* Unexpected unalign kernel fault. */ + struct task_struct *tsk = validate_current(); + + bust_spinlocks(1); + + show_regs(regs); + + if (unlikely(tsk->pid < 2)) { + panic("Kernel unalign fault running %s!", + tsk->pid ? "init" : "the idle task"); + } +#ifdef SUPPORT_DIE + die("Oops", regs); +#endif + bust_spinlocks(1); + + do_group_exit(SIGKILL); + + } else { + unsigned long i, b = 0; + unsigned char *ptr = + (unsigned char *)regs->regs[ra]; + if (load_n_store) { + /* handle get_user(x, ptr) */ + for (i = 0; i < load_store_size; i++) { + ret = get_user(b, ptr++); + if (!ret) { + /* Success! update x. */ +#ifdef __LITTLE_ENDIAN + x |= (b << (8 * i)); +#else + x <<= 8; + x |= b; +#endif /* __LITTLE_ENDIAN */ + } else { + x = 0; + break; + } + } + + /* Sign-extend 4-byte loads. */ + if (load_store_size == 4) + x = (long)(int)x; + + /* Set register rd. */ + regs->regs[rd] = x; + + /* Set register rx. */ + regs->regs[rx] = ret; + + /* Bump pc. */ + regs->pc += 8; + + } else { + /* Handle put_user(x, ptr) */ + x = regs->regs[rb]; +#ifdef __LITTLE_ENDIAN + b = x; +#else + /* + * Swap x in order to store x from low + * to high memory same as the + * little-endian case. + */ + switch (load_store_size) { + case 8: + b = swab64(x); + break; + case 4: + b = swab32(x); + break; + case 2: + b = swab16(x); + break; + } +#endif /* __LITTLE_ENDIAN */ + for (i = 0; i < load_store_size; i++) { + ret = put_user(b, ptr++); + if (ret) + break; + /* Success! shift 1 byte. */ + b >>= 8; + } + /* Set register rx. */ + regs->regs[rx] = ret; + + /* Bump pc. */ + regs->pc += 8; + } + } + + unaligned_fixup_count++; + + if (unaligned_printk) { + pr_info("%s/%d. Unalign fixup for kernel access " + "to userspace %lx.", + current->comm, current->pid, regs->regs[ra]); + } + + /* Done! Return to the exception handler. */ + return; + } + + if ((align_ctl == 0) || unexpected) { + siginfo_t info = { + .si_signo = SIGBUS, + .si_code = BUS_ADRALN, + .si_addr = (unsigned char __user *)0 + }; + if (unaligned_printk) + pr_info("Unalign bundle: unexp @%llx, %llx", + (unsigned long long)regs->pc, + (unsigned long long)bundle); + + if (ra < 56) { + unsigned long uaa = (unsigned long)regs->regs[ra]; + /* Set bus Address. */ + info.si_addr = (unsigned char __user *)uaa; + } + + unaligned_fixup_count++; + + trace_unhandled_signal("unaligned fixup trap", regs, + (unsigned long)info.si_addr, SIGBUS); + force_sig_info(info.si_signo, &info, current); + return; + } + +#ifdef __LITTLE_ENDIAN +#define UA_FIXUP_ADDR_DELTA 1 +#define UA_FIXUP_BFEXT_START(_B_) 0 +#define UA_FIXUP_BFEXT_END(_B_) (8 * (_B_) - 1) +#else /* __BIG_ENDIAN */ +#define UA_FIXUP_ADDR_DELTA -1 +#define UA_FIXUP_BFEXT_START(_B_) (64 - 8 * (_B_)) +#define UA_FIXUP_BFEXT_END(_B_) 63 +#endif /* __LITTLE_ENDIAN */ + + + + if ((ra != rb) && (rd != TREG_SP) && !alias && + !y1_br && !y1_lr && !x1_add) { + /* + * Simple case: ra != rb and no register alias found, + * and no branch or link. This will be the majority. + * We can do a little better for simplae case than the + * generic scheme below. + */ + if (!load_n_store) { + /* + * Simple store: ra != rb, no need for scratch register. + * Just store and rotate to right bytewise. + */ +#ifdef __BIG_ENDIAN + frag.insn[n++] = + jit_x0_addi(ra, ra, load_store_size - 1) | + jit_x1_fnop(); +#endif /* __BIG_ENDIAN */ + for (k = 0; k < load_store_size; k++) { + /* Store a byte. */ + frag.insn[n++] = + jit_x0_rotli(rb, rb, 56) | + jit_x1_st1_add(ra, rb, + UA_FIXUP_ADDR_DELTA); + } +#ifdef __BIG_ENDIAN + frag.insn[n] = jit_x1_addi(ra, ra, 1); +#else + frag.insn[n] = jit_x1_addi(ra, ra, + -1 * load_store_size); +#endif /* __LITTLE_ENDIAN */ + + if (load_store_size == 8) { + frag.insn[n] |= jit_x0_fnop(); + } else if (load_store_size == 4) { + frag.insn[n] |= jit_x0_rotli(rb, rb, 32); + } else { /* = 2 */ + frag.insn[n] |= jit_x0_rotli(rb, rb, 16); + } + n++; + if (bundle_2_enable) + frag.insn[n++] = bundle_2; + frag.insn[n++] = jit_x0_fnop() | jit_x1_iret(); + } else { + if (rd == ra) { + /* Use two clobber registers: clob1/2. */ + frag.insn[n++] = + jit_x0_addi(TREG_SP, TREG_SP, -16) | + jit_x1_fnop(); + frag.insn[n++] = + jit_x0_addi(clob1, ra, 7) | + jit_x1_st_add(TREG_SP, clob1, -8); + frag.insn[n++] = + jit_x0_addi(clob2, ra, 0) | + jit_x1_st(TREG_SP, clob2); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ldna(rd, ra); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ldna(clob1, clob1); + /* + * Note: we must make sure that rd must not + * be sp. Recover clob1/2 from stack. + */ + frag.insn[n++] = + jit_x0_dblalign(rd, clob1, clob2) | + jit_x1_ld_add(clob2, TREG_SP, 8); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ld_add(clob1, TREG_SP, 16); + } else { + /* Use one clobber register: clob1 only. */ + frag.insn[n++] = + jit_x0_addi(TREG_SP, TREG_SP, -16) | + jit_x1_fnop(); + frag.insn[n++] = + jit_x0_addi(clob1, ra, 7) | + jit_x1_st(TREG_SP, clob1); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ldna(rd, ra); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ldna(clob1, clob1); + /* + * Note: we must make sure that rd must not + * be sp. Recover clob1 from stack. + */ + frag.insn[n++] = + jit_x0_dblalign(rd, clob1, ra) | + jit_x1_ld_add(clob1, TREG_SP, 16); + } + + if (bundle_2_enable) + frag.insn[n++] = bundle_2; + /* + * For non 8-byte load, extract corresponding bytes and + * signed extension. + */ + if (load_store_size == 4) { + if (load_store_signed) + frag.insn[n++] = + jit_x0_bfexts( + rd, rd, + UA_FIXUP_BFEXT_START(4), + UA_FIXUP_BFEXT_END(4)) | + jit_x1_fnop(); + else + frag.insn[n++] = + jit_x0_bfextu( + rd, rd, + UA_FIXUP_BFEXT_START(4), + UA_FIXUP_BFEXT_END(4)) | + jit_x1_fnop(); + } else if (load_store_size == 2) { + if (load_store_signed) + frag.insn[n++] = + jit_x0_bfexts( + rd, rd, + UA_FIXUP_BFEXT_START(2), + UA_FIXUP_BFEXT_END(2)) | + jit_x1_fnop(); + else + frag.insn[n++] = + jit_x0_bfextu( + rd, rd, + UA_FIXUP_BFEXT_START(2), + UA_FIXUP_BFEXT_END(2)) | + jit_x1_fnop(); + } + + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_iret(); + } + } else if (!load_n_store) { + + /* + * Generic memory store cases: use 3 clobber registers. + * + * Alloc space for saveing clob2,1,3 on user's stack. + * register clob3 points to where clob2 saved, followed by + * clob1 and 3 from high to low memory. + */ + frag.insn[n++] = + jit_x0_addi(TREG_SP, TREG_SP, -32) | + jit_x1_fnop(); + frag.insn[n++] = + jit_x0_addi(clob3, TREG_SP, 16) | + jit_x1_st_add(TREG_SP, clob3, 8); +#ifdef __LITTLE_ENDIAN + frag.insn[n++] = + jit_x0_addi(clob1, ra, 0) | + jit_x1_st_add(TREG_SP, clob1, 8); +#else + frag.insn[n++] = + jit_x0_addi(clob1, ra, load_store_size - 1) | + jit_x1_st_add(TREG_SP, clob1, 8); +#endif + if (load_store_size == 8) { + /* + * We save one byte a time, not for fast, but compact + * code. After each store, data source register shift + * right one byte. unchanged after 8 stores. + */ + frag.insn[n++] = + jit_x0_addi(clob2, TREG_ZERO, 7) | + jit_x1_st_add(TREG_SP, clob2, 16); + frag.insn[n++] = + jit_x0_rotli(rb, rb, 56) | + jit_x1_st1_add(clob1, rb, UA_FIXUP_ADDR_DELTA); + frag.insn[n++] = + jit_x0_addi(clob2, clob2, -1) | + jit_x1_bnezt(clob2, -1); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_addi(clob2, y1_br_reg, 0); + } else if (load_store_size == 4) { + frag.insn[n++] = + jit_x0_addi(clob2, TREG_ZERO, 3) | + jit_x1_st_add(TREG_SP, clob2, 16); + frag.insn[n++] = + jit_x0_rotli(rb, rb, 56) | + jit_x1_st1_add(clob1, rb, UA_FIXUP_ADDR_DELTA); + frag.insn[n++] = + jit_x0_addi(clob2, clob2, -1) | + jit_x1_bnezt(clob2, -1); + /* + * same as 8-byte case, but need shift another 4 + * byte to recover rb for 4-byte store. + */ + frag.insn[n++] = jit_x0_rotli(rb, rb, 32) | + jit_x1_addi(clob2, y1_br_reg, 0); + } else { /* =2 */ + frag.insn[n++] = + jit_x0_addi(clob2, rb, 0) | + jit_x1_st_add(TREG_SP, clob2, 16); + for (k = 0; k < 2; k++) { + frag.insn[n++] = + jit_x0_shrui(rb, rb, 8) | + jit_x1_st1_add(clob1, rb, + UA_FIXUP_ADDR_DELTA); + } + frag.insn[n++] = + jit_x0_addi(rb, clob2, 0) | + jit_x1_addi(clob2, y1_br_reg, 0); + } + + if (bundle_2_enable) + frag.insn[n++] = bundle_2; + + if (y1_lr) { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_mfspr(y1_lr_reg, + SPR_EX_CONTEXT_0_0); + } + if (y1_br) { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_mtspr(SPR_EX_CONTEXT_0_0, + clob2); + } + if (x1_add) { + frag.insn[n++] = + jit_x0_addi(ra, ra, x1_add_imm8) | + jit_x1_ld_add(clob2, clob3, -8); + } else { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ld_add(clob2, clob3, -8); + } + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ld_add(clob1, clob3, -8); + frag.insn[n++] = jit_x0_fnop() | jit_x1_ld(clob3, clob3); + frag.insn[n++] = jit_x0_fnop() | jit_x1_iret(); + + } else { + /* + * Generic memory load cases. + * + * Alloc space for saveing clob1,2,3 on user's stack. + * register clob3 points to where clob1 saved, followed + * by clob2 and 3 from high to low memory. + */ + + frag.insn[n++] = + jit_x0_addi(TREG_SP, TREG_SP, -32) | + jit_x1_fnop(); + frag.insn[n++] = + jit_x0_addi(clob3, TREG_SP, 16) | + jit_x1_st_add(TREG_SP, clob3, 8); + frag.insn[n++] = + jit_x0_addi(clob2, ra, 0) | + jit_x1_st_add(TREG_SP, clob2, 8); + + if (y1_br) { + frag.insn[n++] = + jit_x0_addi(clob1, y1_br_reg, 0) | + jit_x1_st_add(TREG_SP, clob1, 16); + } else { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_st_add(TREG_SP, clob1, 16); + } + + if (bundle_2_enable) + frag.insn[n++] = bundle_2; + + if (y1_lr) { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_mfspr(y1_lr_reg, + SPR_EX_CONTEXT_0_0); + } + + if (y1_br) { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_mtspr(SPR_EX_CONTEXT_0_0, + clob1); + } + + frag.insn[n++] = + jit_x0_addi(clob1, clob2, 7) | + jit_x1_ldna(rd, clob2); + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ldna(clob1, clob1); + frag.insn[n++] = + jit_x0_dblalign(rd, clob1, clob2) | + jit_x1_ld_add(clob1, clob3, -8); + if (x1_add) { + frag.insn[n++] = + jit_x0_addi(ra, ra, x1_add_imm8) | + jit_x1_ld_add(clob2, clob3, -8); + } else { + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ld_add(clob2, clob3, -8); + } + + frag.insn[n++] = + jit_x0_fnop() | + jit_x1_ld(clob3, clob3); + + if (load_store_size == 4) { + if (load_store_signed) + frag.insn[n++] = + jit_x0_bfexts( + rd, rd, + UA_FIXUP_BFEXT_START(4), + UA_FIXUP_BFEXT_END(4)) | + jit_x1_fnop(); + else + frag.insn[n++] = + jit_x0_bfextu( + rd, rd, + UA_FIXUP_BFEXT_START(4), + UA_FIXUP_BFEXT_END(4)) | + jit_x1_fnop(); + } else if (load_store_size == 2) { + if (load_store_signed) + frag.insn[n++] = + jit_x0_bfexts( + rd, rd, + UA_FIXUP_BFEXT_START(2), + UA_FIXUP_BFEXT_END(2)) | + jit_x1_fnop(); + else + frag.insn[n++] = + jit_x0_bfextu( + rd, rd, + UA_FIXUP_BFEXT_START(2), + UA_FIXUP_BFEXT_END(2)) | + jit_x1_fnop(); + } + + frag.insn[n++] = jit_x0_fnop() | jit_x1_iret(); + } + + /* Max JIT bundle count is 14. */ + WARN_ON(n > 14); + + if (!unexpected) { + int status = 0; + int idx = (regs->pc >> 3) & + ((1ULL << (PAGE_SHIFT - UNALIGN_JIT_SHIFT)) - 1); + + frag.pc = regs->pc; + frag.bundle = bundle; + + if (unaligned_printk) { + pr_info("%s/%d, Unalign fixup: pc=%lx " + "bundle=%lx %d %d %d %d %d %d %d %d.", + current->comm, current->pid, + (unsigned long)frag.pc, + (unsigned long)frag.bundle, + (int)alias, (int)rd, (int)ra, + (int)rb, (int)bundle_2_enable, + (int)y1_lr, (int)y1_br, (int)x1_add); + + for (k = 0; k < n; k += 2) + pr_info("[%d] %016llx %016llx", k, + (unsigned long long)frag.insn[k], + (unsigned long long)frag.insn[k+1]); + } + + /* Swap bundle byte order for big endian sys. */ +#ifdef __BIG_ENDIAN + frag.bundle = GX_INSN_BSWAP(frag.bundle); + for (k = 0; k < n; k++) + frag.insn[k] = GX_INSN_BSWAP(frag.insn[k]); +#endif /* __BIG_ENDIAN */ + + status = copy_to_user((void __user *)&jit_code_area[idx], + &frag, sizeof(frag)); + if (status) { + /* Fail to copy JIT into user land. send SIGSEGV. */ + siginfo_t info = { + .si_signo = SIGSEGV, + .si_code = SEGV_MAPERR, + .si_addr = (void __user *)&jit_code_area[idx] + }; + + pr_warn("Unalign fixup: pid=%d %s jit_code_area=%llx", + current->pid, current->comm, + (unsigned long long)&jit_code_area[idx]); + + trace_unhandled_signal("segfault in unalign fixup", + regs, + (unsigned long)info.si_addr, + SIGSEGV); + force_sig_info(info.si_signo, &info, current); + return; + } + + + /* Do a cheaper increment, not accurate. */ + unaligned_fixup_count++; + __flush_icache_range((unsigned long)&jit_code_area[idx], + (unsigned long)&jit_code_area[idx] + + sizeof(frag)); + + /* Setup SPR_EX_CONTEXT_0_0/1 for returning to user program.*/ + __insn_mtspr(SPR_EX_CONTEXT_0_0, regs->pc + 8); + __insn_mtspr(SPR_EX_CONTEXT_0_1, PL_ICS_EX1(USER_PL, 0)); + + /* Modify pc at the start of new JIT. */ + regs->pc = (unsigned long)&jit_code_area[idx].insn[0]; + /* Set ICS in SPR_EX_CONTEXT_K_1. */ + regs->ex1 = PL_ICS_EX1(USER_PL, 1); + } +} + + +/* + * C function to generate unalign data JIT. Called from unalign data + * interrupt handler. + * + * First check if unalign fix is disabled or exception did not not come from + * user space or sp register points to unalign address, if true, generate a + * SIGBUS. Then map a page into user space as JIT area if it is not mapped + * yet. Genenerate JIT code by calling jit_bundle_gen(). After that return + * back to exception handler. + * + * The exception handler will "iret" to new generated JIT code after + * restoring caller saved registers. In theory, the JIT code will perform + * another "iret" to resume user's program. + */ + +void do_unaligned(struct pt_regs *regs, int vecnum) +{ + tilegx_bundle_bits __user *pc; + tilegx_bundle_bits bundle; + struct thread_info *info = current_thread_info(); + int align_ctl; + + /* Checks the per-process unaligned JIT flags */ + align_ctl = unaligned_fixup; + switch (task_thread_info(current)->align_ctl) { + case PR_UNALIGN_NOPRINT: + align_ctl = 1; + break; + case PR_UNALIGN_SIGBUS: + align_ctl = 0; + break; + } + + /* Enable iterrupt in order to access user land. */ + local_irq_enable(); + + /* + * The fault came from kernel space. Two choices: + * (a) unaligned_fixup < 1, we will first call get/put_user fixup + * to return -EFAULT. If no fixup, simply panic the kernel. + * (b) unaligned_fixup >=1, we will try to fix the unaligned access + * if it was triggered by get_user/put_user() macros. Panic the + * kernel if it is not fixable. + */ + + if (EX1_PL(regs->ex1) != USER_PL) { + + if (align_ctl < 1) { + unaligned_fixup_count++; + /* If exception came from kernel, try fix it up. */ + if (fixup_exception(regs)) { + if (unaligned_printk) + pr_info("Unalign fixup: %d %llx @%llx", + (int)unaligned_fixup, + (unsigned long long)regs->ex1, + (unsigned long long)regs->pc); + return; + } + /* Not fixable. Go panic. */ + panic("Unalign exception in Kernel. pc=%lx", + regs->pc); + return; + } else { + /* + * Try to fix the exception. If we can't, panic the + * kernel. + */ + bundle = GX_INSN_BSWAP( + *((tilegx_bundle_bits *)(regs->pc))); + jit_bundle_gen(regs, bundle, align_ctl); + return; + } + } + + /* + * Fault came from user with ICS or stack is not aligned. + * If so, we will trigger SIGBUS. + */ + if ((regs->sp & 0x7) || (regs->ex1) || (align_ctl < 0)) { + siginfo_t info = { + .si_signo = SIGBUS, + .si_code = BUS_ADRALN, + .si_addr = (unsigned char __user *)0 + }; + + if (unaligned_printk) + pr_info("Unalign fixup: %d %llx @%llx", + (int)unaligned_fixup, + (unsigned long long)regs->ex1, + (unsigned long long)regs->pc); + + unaligned_fixup_count++; + + trace_unhandled_signal("unaligned fixup trap", regs, 0, SIGBUS); + force_sig_info(info.si_signo, &info, current); + return; + } + + + /* Read the bundle casued the exception! */ + pc = (tilegx_bundle_bits __user *)(regs->pc); + if (get_user(bundle, pc) != 0) { + /* Probably never be here since pc is valid user address.*/ + siginfo_t info = { + .si_signo = SIGSEGV, + .si_code = SEGV_MAPERR, + .si_addr = (void __user *)pc + }; + pr_err("Couldn't read instruction at %p trying to step\n", pc); + trace_unhandled_signal("segfault in unalign fixup", regs, + (unsigned long)info.si_addr, SIGSEGV); + force_sig_info(info.si_signo, &info, current); + return; + } + + if (!info->unalign_jit_base) { + void __user *user_page; + + /* + * Allocate a page in userland. + * For 64-bit processes we try to place the mapping far + * from anything else that might be going on (specifically + * 64 GB below the top of the user address space). If it + * happens not to be possible to put it there, it's OK; + * the kernel will choose another location and we'll + * remember it for later. + */ + if (is_compat_task()) + user_page = NULL; + else + user_page = (void __user *)(TASK_SIZE - (1UL << 36)) + + (current->pid << PAGE_SHIFT); + + user_page = (void __user *) vm_mmap(NULL, + (unsigned long)user_page, + PAGE_SIZE, + PROT_EXEC | PROT_READ | + PROT_WRITE, +#ifdef CONFIG_HOMECACHE + MAP_CACHE_HOME_TASK | +#endif + MAP_PRIVATE | + MAP_ANONYMOUS, + 0); + + if (IS_ERR((void __force *)user_page)) { + pr_err("Out of kernel pages trying do_mmap.\n"); + return; + } + + /* Save the address in the thread_info struct */ + info->unalign_jit_base = user_page; + if (unaligned_printk) + pr_info("Unalign bundle: %d:%d, allocate page @%llx", + raw_smp_processor_id(), current->pid, + (unsigned long long)user_page); + } + + /* Generate unalign JIT */ + jit_bundle_gen(regs, GX_INSN_BSWAP(bundle), align_ctl); +} + +#endif /* __tilegx__ */ diff --git a/arch/tile/kernel/vdso.c b/arch/tile/kernel/vdso.c new file mode 100644 index 0000000..1533af2 --- /dev/null +++ b/arch/tile/kernel/vdso.c @@ -0,0 +1,212 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/binfmts.h> +#include <linux/compat.h> +#include <linux/elf.h> +#include <linux/mm.h> +#include <linux/pagemap.h> + +#include <asm/vdso.h> +#include <asm/mman.h> +#include <asm/sections.h> + +#include <arch/sim.h> + +/* The alignment of the vDSO. */ +#define VDSO_ALIGNMENT PAGE_SIZE + + +static unsigned int vdso_pages; +static struct page **vdso_pagelist; + +#ifdef CONFIG_COMPAT +static unsigned int vdso32_pages; +static struct page **vdso32_pagelist; +#endif +static int vdso_ready; + +/* + * The vdso data page. + */ +static union { + struct vdso_data data; + u8 page[PAGE_SIZE]; +} vdso_data_store __page_aligned_data; + +struct vdso_data *vdso_data = &vdso_data_store.data; + +static unsigned int __read_mostly vdso_enabled = 1; + +static struct page **vdso_setup(void *vdso_kbase, unsigned int pages) +{ + int i; + struct page **pagelist; + + pagelist = kzalloc(sizeof(struct page *) * (pages + 1), GFP_KERNEL); + BUG_ON(pagelist == NULL); + for (i = 0; i < pages - 1; i++) { + struct page *pg = virt_to_page(vdso_kbase + i*PAGE_SIZE); + ClearPageReserved(pg); + pagelist[i] = pg; + } + pagelist[pages - 1] = virt_to_page(vdso_data); + pagelist[pages] = NULL; + + return pagelist; +} + +static int __init vdso_init(void) +{ + int data_pages = sizeof(vdso_data_store) >> PAGE_SHIFT; + + /* + * We can disable vDSO support generally, but we need to retain + * one page to support the two-bundle (16-byte) rt_sigreturn path. + */ + if (!vdso_enabled) { + size_t offset = (unsigned long)&__vdso_rt_sigreturn; + static struct page *sigret_page; + sigret_page = alloc_page(GFP_KERNEL | __GFP_ZERO); + BUG_ON(sigret_page == NULL); + vdso_pagelist = &sigret_page; + vdso_pages = 1; + BUG_ON(offset >= PAGE_SIZE); + memcpy(page_address(sigret_page) + offset, + vdso_start + offset, 16); +#ifdef CONFIG_COMPAT + vdso32_pages = vdso_pages; + vdso32_pagelist = vdso_pagelist; +#endif + vdso_ready = 1; + return 0; + } + + vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT; + vdso_pages += data_pages; + vdso_pagelist = vdso_setup(vdso_start, vdso_pages); + +#ifdef CONFIG_COMPAT + vdso32_pages = (vdso32_end - vdso32_start) >> PAGE_SHIFT; + vdso32_pages += data_pages; + vdso32_pagelist = vdso_setup(vdso32_start, vdso32_pages); +#endif + + smp_wmb(); + vdso_ready = 1; + + return 0; +} +arch_initcall(vdso_init); + +const char *arch_vma_name(struct vm_area_struct *vma) +{ + if (vma->vm_mm && vma->vm_start == VDSO_BASE) + return "[vdso]"; +#ifndef __tilegx__ + if (vma->vm_start == MEM_USER_INTRPT) + return "[intrpt]"; +#endif + return NULL; +} + +struct vm_area_struct *get_gate_vma(struct mm_struct *mm) +{ + return NULL; +} + +int in_gate_area(struct mm_struct *mm, unsigned long address) +{ + return 0; +} + +int in_gate_area_no_mm(unsigned long address) +{ + return 0; +} + +int setup_vdso_pages(void) +{ + struct page **pagelist; + unsigned long pages; + struct mm_struct *mm = current->mm; + unsigned long vdso_base = 0; + int retval = 0; + + if (!vdso_ready) + return 0; + + mm->context.vdso_base = 0; + + pagelist = vdso_pagelist; + pages = vdso_pages; +#ifdef CONFIG_COMPAT + if (is_compat_task()) { + pagelist = vdso32_pagelist; + pages = vdso32_pages; + } +#endif + + /* + * vDSO has a problem and was disabled, just don't "enable" it for the + * process. + */ + if (pages == 0) + return 0; + + vdso_base = get_unmapped_area(NULL, vdso_base, + (pages << PAGE_SHIFT) + + ((VDSO_ALIGNMENT - 1) & PAGE_MASK), + 0, 0); + if (IS_ERR_VALUE(vdso_base)) { + retval = vdso_base; + return retval; + } + + /* Add required alignment. */ + vdso_base = ALIGN(vdso_base, VDSO_ALIGNMENT); + + /* + * Put vDSO base into mm struct. We need to do this before calling + * install_special_mapping or the perf counter mmap tracking code + * will fail to recognise it as a vDSO (since arch_vma_name fails). + */ + mm->context.vdso_base = vdso_base; + + /* + * our vma flags don't have VM_WRITE so by default, the process isn't + * allowed to write those pages. + * gdb can break that with ptrace interface, and thus trigger COW on + * those pages but it's then your responsibility to never do that on + * the "data" page of the vDSO or you'll stop getting kernel updates + * and your nice userland gettimeofday will be totally dead. + * It's fine to use that for setting breakpoints in the vDSO code + * pages though + */ + retval = install_special_mapping(mm, vdso_base, + pages << PAGE_SHIFT, + VM_READ|VM_EXEC | + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC, + pagelist); + if (retval) + mm->context.vdso_base = 0; + + return retval; +} + +static __init int vdso_func(char *s) +{ + return kstrtouint(s, 0, &vdso_enabled); +} +__setup("vdso=", vdso_func); diff --git a/arch/tile/kernel/vdso/Makefile b/arch/tile/kernel/vdso/Makefile new file mode 100644 index 0000000..e2b7a2f --- /dev/null +++ b/arch/tile/kernel/vdso/Makefile @@ -0,0 +1,118 @@ +# Symbols present in the vdso +vdso-syms = rt_sigreturn gettimeofday + +# Files to link into the vdso +obj-vdso = $(patsubst %, v%.o, $(vdso-syms)) + +# Build rules +targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds +obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) + +# vdso32 is only for tilegx -m32 compat task. +VDSO32-$(CONFIG_COMPAT) := y + +obj-y += vdso.o +obj-$(VDSO32-y) += vdso32.o +extra-y += vdso.lds +CPPFLAGS_vdso.lds += -P -C -U$(ARCH) + +# vDSO code runs in userspace and -pg doesn't help with profiling anyway. +CFLAGS_REMOVE_vdso.o = -pg +CFLAGS_REMOVE_vdso32.o = -pg +CFLAGS_REMOVE_vrt_sigreturn.o = -pg +CFLAGS_REMOVE_vrt_sigreturn32.o = -pg +CFLAGS_REMOVE_vgettimeofday.o = -pg +CFLAGS_REMOVE_vgettimeofday32.o = -pg + +ifdef CONFIG_FEEDBACK_COLLECT +# vDSO code runs in userspace, not collecting feedback data. +CFLAGS_REMOVE_vdso.o = -ffeedback-generate +CFLAGS_REMOVE_vdso32.o = -ffeedback-generate +CFLAGS_REMOVE_vrt_sigreturn.o = -ffeedback-generate +CFLAGS_REMOVE_vrt_sigreturn32.o = -ffeedback-generate +CFLAGS_REMOVE_vgettimeofday.o = -ffeedback-generate +CFLAGS_REMOVE_vgettimeofday32.o = -ffeedback-generate +endif + +# Disable gcov profiling for VDSO code +GCOV_PROFILE := n + +# Force dependency +$(obj)/vdso.o: $(obj)/vdso.so + +# link rule for the .so file, .lds has to be first +SYSCFLAGS_vdso.so.dbg = $(c_flags) +$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) + $(call if_changed,vdsold) + + +# We also create a special relocatable object that should mirror the symbol +# table and layout of the linked DSO. With ld -R we can then refer to +# these symbols in the kernel code rather than hand-coded addresses. +extra-y += vdso-syms.o +$(obj)/built-in.o: $(obj)/vdso-syms.o +$(obj)/built-in.o: ld_flags += -R $(obj)/vdso-syms.o + +SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \ + $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) +SYSCFLAGS_vdso_syms.o = -r +$(obj)/vdso-syms.o: $(src)/vdso.lds $(obj)/vrt_sigreturn.o FORCE + $(call if_changed,vdsold) + + +# strip rule for the .so file +$(obj)/%.so: OBJCOPYFLAGS := -S +$(obj)/%.so: $(obj)/%.so.dbg FORCE + $(call if_changed,objcopy) + +# actual build commands +# The DSO images are built using a special linker script +# Add -lgcc so tilepro gets static muldi3 and lshrdi3 definitions. +# Make sure only to export the intended __vdso_xxx symbol offsets. +quiet_cmd_vdsold = VDSOLD $@ + cmd_vdsold = $(CC) $(KCFLAGS) -nostdlib $(SYSCFLAGS_$(@F)) \ + -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp -lgcc && \ + $(CROSS_COMPILE)objcopy \ + $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ + +# install commands for the unstripped file +quiet_cmd_vdso_install = INSTALL $@ + cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ + +vdso.so: $(obj)/vdso.so.dbg + @mkdir -p $(MODLIB)/vdso + $(call cmd,vdso_install) + +vdso32.so: $(obj)/vdso32.so.dbg + $(call cmd,vdso_install) + +vdso_install: vdso.so +vdso32_install: vdso32.so + + +KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) +KBUILD_AFLAGS_32 += -m32 -s +KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) +KBUILD_CFLAGS_32 += -m32 -fPIC -shared + +obj-vdso32 = $(patsubst %, v%32.o, $(vdso-syms)) +obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) + +targets += $(obj-vdso32) vdso32.so vdso32.so.dbg + +$(obj-vdso32:%=%): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) +$(obj-vdso32:%=%): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) + +$(obj)/vgettimeofday32.o: $(obj)/vgettimeofday.c + $(call if_changed,cc_o_c) + +$(obj)/vrt_sigreturn32.o: $(obj)/vrt_sigreturn.S + $(call if_changed,as_o_S) + +# Force dependency +$(obj)/vdso32.o: $(obj)/vdso32.so + +SYSCFLAGS_vdso32.so.dbg = -m32 -shared -s -Wl,-soname=linux-vdso32.so.1 \ + $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) +$(obj)/vdso32.so.dbg: $(src)/vdso.lds $(obj-vdso32) + $(call if_changed,vdsold) diff --git a/arch/tile/kernel/vdso/vdso.S b/arch/tile/kernel/vdso/vdso.S new file mode 100644 index 0000000..3467adb --- /dev/null +++ b/arch/tile/kernel/vdso/vdso.S @@ -0,0 +1,28 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/init.h> +#include <linux/linkage.h> +#include <asm/page.h> + + __PAGE_ALIGNED_DATA + + .global vdso_start, vdso_end + .align PAGE_SIZE +vdso_start: + .incbin "arch/tile/kernel/vdso/vdso.so" + .align PAGE_SIZE +vdso_end: + + .previous diff --git a/arch/tile/kernel/vdso/vdso.lds.S b/arch/tile/kernel/vdso/vdso.lds.S new file mode 100644 index 0000000..041cd6c --- /dev/null +++ b/arch/tile/kernel/vdso/vdso.lds.S @@ -0,0 +1,87 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#define VDSO_VERSION_STRING LINUX_2.6 + + +OUTPUT_ARCH(tile) + +/* The ELF entry point can be used to set the AT_SYSINFO value. */ +ENTRY(__vdso_rt_sigreturn); + + +SECTIONS +{ + . = SIZEOF_HEADERS; + + .hash : { *(.hash) } :text + .gnu.hash : { *(.gnu.hash) } + .dynsym : { *(.dynsym) } + .dynstr : { *(.dynstr) } + .gnu.version : { *(.gnu.version) } + .gnu.version_d : { *(.gnu.version_d) } + .gnu.version_r : { *(.gnu.version_r) } + + .note : { *(.note.*) } :text :note + .dynamic : { *(.dynamic) } :text :dynamic + + .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr + .eh_frame : { KEEP (*(.eh_frame)) } :text + + .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } + + /* + * This linker script is used both with -r and with -shared. + * For the layouts to match, we need to skip more than enough + * space for the dynamic symbol table et al. If this amount + * is insufficient, ld -shared will barf. Just increase it here. + */ + . = 0x1000; + .text : { *(.text .text.*) } :text + + .data : { + *(.got.plt) *(.got) + *(.data .data.* .gnu.linkonce.d.*) + *(.dynbss) + *(.bss .bss.* .gnu.linkonce.b.*) + } +} + + +/* + * We must supply the ELF program headers explicitly to get just one + * PT_LOAD segment, and set the flags explicitly to make segments read-only. + */ +PHDRS +{ + text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ + dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ + note PT_NOTE FLAGS(4); /* PF_R */ + eh_frame_hdr PT_GNU_EH_FRAME; +} + + +/* + * This controls what userland symbols we export from the vDSO. + */ +VERSION +{ + VDSO_VERSION_STRING { + global: + __vdso_rt_sigreturn; + __vdso_gettimeofday; + gettimeofday; + local:*; + }; +} diff --git a/arch/tile/kernel/vdso/vdso32.S b/arch/tile/kernel/vdso/vdso32.S new file mode 100644 index 0000000..1d1ac32 --- /dev/null +++ b/arch/tile/kernel/vdso/vdso32.S @@ -0,0 +1,28 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/init.h> +#include <linux/linkage.h> +#include <asm/page.h> + + __PAGE_ALIGNED_DATA + + .global vdso32_start, vdso32_end + .align PAGE_SIZE +vdso32_start: + .incbin "arch/tile/kernel/vdso/vdso32.so" + .align PAGE_SIZE +vdso32_end: + + .previous diff --git a/arch/tile/kernel/vdso/vgettimeofday.c b/arch/tile/kernel/vdso/vgettimeofday.c new file mode 100644 index 0000000..51ec8e4 --- /dev/null +++ b/arch/tile/kernel/vdso/vgettimeofday.c @@ -0,0 +1,107 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#define VDSO_BUILD /* avoid some shift warnings for -m32 in <asm/page.h> */ +#include <linux/time.h> +#include <asm/timex.h> +#include <asm/vdso.h> + +#if CHIP_HAS_SPLIT_CYCLE() +static inline cycles_t get_cycles_inline(void) +{ + unsigned int high = __insn_mfspr(SPR_CYCLE_HIGH); + unsigned int low = __insn_mfspr(SPR_CYCLE_LOW); + unsigned int high2 = __insn_mfspr(SPR_CYCLE_HIGH); + + while (unlikely(high != high2)) { + low = __insn_mfspr(SPR_CYCLE_LOW); + high = high2; + high2 = __insn_mfspr(SPR_CYCLE_HIGH); + } + + return (((cycles_t)high) << 32) | low; +} +#define get_cycles get_cycles_inline +#endif + +/* + * Find out the vDSO data page address in the process address space. + */ +inline unsigned long get_datapage(void) +{ + unsigned long ret; + + /* vdso data page located in the 2nd vDSO page. */ + asm volatile ("lnk %0" : "=r"(ret)); + ret &= ~(PAGE_SIZE - 1); + ret += PAGE_SIZE; + + return ret; +} + +int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz) +{ + cycles_t cycles; + unsigned long count, sec, ns; + volatile struct vdso_data *vdso_data; + + vdso_data = (struct vdso_data *)get_datapage(); + /* The use of the timezone is obsolete, normally tz is NULL. */ + if (unlikely(tz != NULL)) { + while (1) { + /* Spin until the update finish. */ + count = vdso_data->tz_update_count; + if (count & 1) + continue; + + tz->tz_minuteswest = vdso_data->tz_minuteswest; + tz->tz_dsttime = vdso_data->tz_dsttime; + + /* Check whether updated, read again if so. */ + if (count == vdso_data->tz_update_count) + break; + } + } + + if (unlikely(tv == NULL)) + return 0; + + while (1) { + /* Spin until the update finish. */ + count = vdso_data->tb_update_count; + if (count & 1) + continue; + + cycles = (get_cycles() - vdso_data->xtime_tod_stamp); + ns = (cycles * vdso_data->mult) >> vdso_data->shift; + sec = vdso_data->xtime_clock_sec; + ns += vdso_data->xtime_clock_nsec; + if (ns >= NSEC_PER_SEC) { + ns -= NSEC_PER_SEC; + sec += 1; + } + + /* Check whether updated, read again if so. */ + if (count == vdso_data->tb_update_count) + break; + } + + tv->tv_sec = sec; + tv->tv_usec = ns / 1000; + + return 0; +} + +int gettimeofday(struct timeval *tv, struct timezone *tz) + __attribute__((weak, alias("__vdso_gettimeofday"))); diff --git a/arch/tile/kernel/vdso/vrt_sigreturn.S b/arch/tile/kernel/vdso/vrt_sigreturn.S new file mode 100644 index 0000000..6326caf --- /dev/null +++ b/arch/tile/kernel/vdso/vrt_sigreturn.S @@ -0,0 +1,30 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/linkage.h> +#include <arch/abi.h> +#include <asm/unistd.h> + +/* + * Note that libc has a copy of this function that it uses to compare + * against the PC when a stack backtrace ends, so if this code is + * changed, the libc implementation(s) should also be updated. + */ +ENTRY(__vdso_rt_sigreturn) + moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigreturn + swint1 + /* We don't use ENDPROC to avoid tagging this symbol as FUNC, + * which confuses the perf tool. + */ + END(__vdso_rt_sigreturn) diff --git a/arch/tile/kernel/vmlinux.lds.S b/arch/tile/kernel/vmlinux.lds.S index a13ed90..f1819423 100644 --- a/arch/tile/kernel/vmlinux.lds.S +++ b/arch/tile/kernel/vmlinux.lds.S @@ -5,7 +5,7 @@ #include <hv/hypervisor.h> /* Text loads starting from the supervisor interrupt vector address. */ -#define TEXT_OFFSET MEM_SV_INTRPT +#define TEXT_OFFSET MEM_SV_START OUTPUT_ARCH(tile) ENTRY(_start) @@ -13,7 +13,7 @@ jiffies = jiffies_64; PHDRS { - intrpt1 PT_LOAD ; + intrpt PT_LOAD ; text PT_LOAD ; data PT_LOAD ; } @@ -24,14 +24,17 @@ SECTIONS #define LOAD_OFFSET TEXT_OFFSET /* Interrupt vectors */ - .intrpt1 (LOAD_OFFSET) : AT ( 0 ) /* put at the start of physical memory */ + .intrpt (LOAD_OFFSET) : AT ( 0 ) /* put at the start of physical memory */ { _text = .; - *(.intrpt1) - } :intrpt1 =0 + *(.intrpt) + } :intrpt =0 /* Hypervisor call vectors */ - #include "hvglue.lds" + . = ALIGN(0x10000); + .hvglue : AT (ADDR(.hvglue) - LOAD_OFFSET) { + *(.hvglue) + } :NONE /* Now the real code */ . = ALIGN(0x20000); @@ -40,7 +43,11 @@ SECTIONS HEAD_TEXT SCHED_TEXT LOCK_TEXT + KPROBES_TEXT + IRQENTRY_TEXT __fix_text_end = .; /* tile-cpack won't rearrange before this */ + ALIGN_FUNCTION(); + *(.hottext*) TEXT_TEXT *(.text.*) *(.coldtext*) @@ -67,20 +74,8 @@ SECTIONS __init_end = .; _sdata = .; /* Start of data section */ - RO_DATA_SECTION(PAGE_SIZE) - - /* initially writeable, then read-only */ - . = ALIGN(PAGE_SIZE); - __w1data_begin = .; - .w1data : AT(ADDR(.w1data) - LOAD_OFFSET) { - VMLINUX_SYMBOL(__w1data_begin) = .; - *(.w1data) - VMLINUX_SYMBOL(__w1data_end) = .; - } - RW_DATA_SECTION(L2_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) - _edata = .; EXCEPTION_TABLE(L2_CACHE_BYTES) diff --git a/arch/tile/lib/Makefile b/arch/tile/lib/Makefile index 985f598..c4211cb 100644 --- a/arch/tile/lib/Makefile +++ b/arch/tile/lib/Makefile @@ -4,15 +4,15 @@ lib-y = cacheflush.o checksum.o cpumask.o delay.o uaccess.o \ memmove.o memcpy_$(BITS).o memchr_$(BITS).o memset_$(BITS).o \ - strchr_$(BITS).o strlen_$(BITS).o - -ifeq ($(CONFIG_TILEGX),y) -CFLAGS_REMOVE_memcpy_user_64.o = -fno-omit-frame-pointer -lib-y += memcpy_user_64.o -else -lib-y += atomic_32.o atomic_asm_32.o memcpy_tile64.o -endif + strchr_$(BITS).o strlen_$(BITS).o strnlen_$(BITS).o +lib-$(CONFIG_TILEGX) += memcpy_user_64.o +lib-$(CONFIG_TILEPRO) += atomic_32.o atomic_asm_32.o lib-$(CONFIG_SMP) += spinlock_$(BITS).o usercopy_$(BITS).o obj-$(CONFIG_MODULES) += exports.o + +# The finv_buffer_remote() and copy_{to,from}_user() routines can't +# have -pg added, since they both rely on being leaf functions. +CFLAGS_REMOVE_cacheflush.o = -pg +CFLAGS_REMOVE_memcpy_user_64.o = -pg diff --git a/arch/tile/lib/atomic_32.c b/arch/tile/lib/atomic_32.c index f5cada7..759efa3 100644 --- a/arch/tile/lib/atomic_32.c +++ b/arch/tile/lib/atomic_32.c @@ -20,50 +20,12 @@ #include <linux/atomic.h> #include <arch/chip.h> -/* See <asm/atomic_32.h> */ -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - -/* - * A block of memory containing locks for atomic ops. Each instance of this - * struct will be homed on a different CPU. - */ -struct atomic_locks_on_cpu { - int lock[ATOMIC_HASH_L2_SIZE]; -} __attribute__((aligned(ATOMIC_HASH_L2_SIZE * 4))); - -static DEFINE_PER_CPU(struct atomic_locks_on_cpu, atomic_lock_pool); - -/* The locks we'll use until __init_atomic_per_cpu is called. */ -static struct atomic_locks_on_cpu __initdata initial_atomic_locks; - -/* Hash into this vector to get a pointer to lock for the given atomic. */ -struct atomic_locks_on_cpu *atomic_lock_ptr[ATOMIC_HASH_L1_SIZE] - __write_once = { - [0 ... ATOMIC_HASH_L1_SIZE-1] (&initial_atomic_locks) -}; - -#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ - /* This page is remapped on startup to be hash-for-home. */ int atomic_locks[PAGE_SIZE / sizeof(int)] __page_aligned_bss; -#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ - int *__atomic_hashed_lock(volatile void *v) { /* NOTE: this code must match "sys_cmpxchg" in kernel/intvec_32.S */ -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - unsigned long i = - (unsigned long) v & ((PAGE_SIZE-1) & -sizeof(long long)); - unsigned long n = __insn_crc32_32(0, i); - - /* Grab high bits for L1 index. */ - unsigned long l1_index = n >> ((sizeof(n) * 8) - ATOMIC_HASH_L1_SHIFT); - /* Grab low bits for L2 index. */ - unsigned long l2_index = n & (ATOMIC_HASH_L2_SIZE - 1); - - return &atomic_lock_ptr[l1_index]->lock[l2_index]; -#else /* * Use bits [3, 3 + ATOMIC_HASH_SHIFT) as the lock index. * Using mm works here because atomic_locks is page aligned. @@ -72,26 +34,13 @@ int *__atomic_hashed_lock(volatile void *v) (unsigned long)atomic_locks, 2, (ATOMIC_HASH_SHIFT + 2) - 1); return (int *)ptr; -#endif } #ifdef CONFIG_SMP /* Return whether the passed pointer is a valid atomic lock pointer. */ static int is_atomic_lock(int *p) { -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - int i; - for (i = 0; i < ATOMIC_HASH_L1_SIZE; ++i) { - - if (p >= &atomic_lock_ptr[i]->lock[0] && - p < &atomic_lock_ptr[i]->lock[ATOMIC_HASH_L2_SIZE]) { - return 1; - } - } - return 0; -#else return p >= &atomic_locks[0] && p < &atomic_locks[ATOMIC_HASH_SIZE]; -#endif } void __atomic_fault_unlock(int *irqlock_word) @@ -110,33 +59,32 @@ static inline int *__atomic_setup(volatile void *v) return __atomic_hashed_lock(v); } -int _atomic_xchg(atomic_t *v, int n) +int _atomic_xchg(int *v, int n) { - return __atomic_xchg(&v->counter, __atomic_setup(v), n).val; + return __atomic_xchg(v, __atomic_setup(v), n).val; } EXPORT_SYMBOL(_atomic_xchg); -int _atomic_xchg_add(atomic_t *v, int i) +int _atomic_xchg_add(int *v, int i) { - return __atomic_xchg_add(&v->counter, __atomic_setup(v), i).val; + return __atomic_xchg_add(v, __atomic_setup(v), i).val; } EXPORT_SYMBOL(_atomic_xchg_add); -int _atomic_xchg_add_unless(atomic_t *v, int a, int u) +int _atomic_xchg_add_unless(int *v, int a, int u) { /* * Note: argument order is switched here since it is easier * to use the first argument consistently as the "old value" * in the assembly, as is done for _atomic_cmpxchg(). */ - return __atomic_xchg_add_unless(&v->counter, __atomic_setup(v), u, a) - .val; + return __atomic_xchg_add_unless(v, __atomic_setup(v), u, a).val; } EXPORT_SYMBOL(_atomic_xchg_add_unless); -int _atomic_cmpxchg(atomic_t *v, int o, int n) +int _atomic_cmpxchg(int *v, int o, int n) { - return __atomic_cmpxchg(&v->counter, __atomic_setup(v), o, n).val; + return __atomic_cmpxchg(v, __atomic_setup(v), o, n).val; } EXPORT_SYMBOL(_atomic_cmpxchg); @@ -159,33 +107,32 @@ unsigned long _atomic_xor(volatile unsigned long *p, unsigned long mask) EXPORT_SYMBOL(_atomic_xor); -u64 _atomic64_xchg(atomic64_t *v, u64 n) +u64 _atomic64_xchg(u64 *v, u64 n) { - return __atomic64_xchg(&v->counter, __atomic_setup(v), n); + return __atomic64_xchg(v, __atomic_setup(v), n); } EXPORT_SYMBOL(_atomic64_xchg); -u64 _atomic64_xchg_add(atomic64_t *v, u64 i) +u64 _atomic64_xchg_add(u64 *v, u64 i) { - return __atomic64_xchg_add(&v->counter, __atomic_setup(v), i); + return __atomic64_xchg_add(v, __atomic_setup(v), i); } EXPORT_SYMBOL(_atomic64_xchg_add); -u64 _atomic64_xchg_add_unless(atomic64_t *v, u64 a, u64 u) +u64 _atomic64_xchg_add_unless(u64 *v, u64 a, u64 u) { /* * Note: argument order is switched here since it is easier * to use the first argument consistently as the "old value" * in the assembly, as is done for _atomic_cmpxchg(). */ - return __atomic64_xchg_add_unless(&v->counter, __atomic_setup(v), - u, a); + return __atomic64_xchg_add_unless(v, __atomic_setup(v), u, a); } EXPORT_SYMBOL(_atomic64_xchg_add_unless); -u64 _atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n) +u64 _atomic64_cmpxchg(u64 *v, u64 o, u64 n) { - return __atomic64_cmpxchg(&v->counter, __atomic_setup(v), o, n); + return __atomic64_cmpxchg(v, __atomic_setup(v), o, n); } EXPORT_SYMBOL(_atomic64_cmpxchg); @@ -208,54 +155,8 @@ struct __get_user __atomic_bad_address(int __user *addr) } -#if CHIP_HAS_CBOX_HOME_MAP() -static int __init noatomichash(char *str) -{ - pr_warning("noatomichash is deprecated.\n"); - return 1; -} -__setup("noatomichash", noatomichash); -#endif - void __init __init_atomic_per_cpu(void) { -#if ATOMIC_LOCKS_FOUND_VIA_TABLE() - - unsigned int i; - int actual_cpu; - - /* - * Before this is called from setup, we just have one lock for - * all atomic objects/operations. Here we replace the - * elements of atomic_lock_ptr so that they point at per_cpu - * integers. This seemingly over-complex approach stems from - * the fact that DEFINE_PER_CPU defines an entry for each cpu - * in the grid, not each cpu from 0..ATOMIC_HASH_SIZE-1. But - * for efficient hashing of atomics to their locks we want a - * compile time constant power of 2 for the size of this - * table, so we use ATOMIC_HASH_SIZE. - * - * Here we populate atomic_lock_ptr from the per cpu - * atomic_lock_pool, interspersing by actual cpu so that - * subsequent elements are homed on consecutive cpus. - */ - - actual_cpu = cpumask_first(cpu_possible_mask); - - for (i = 0; i < ATOMIC_HASH_L1_SIZE; ++i) { - /* - * Preincrement to slightly bias against using cpu 0, - * which has plenty of stuff homed on it already. - */ - actual_cpu = cpumask_next(actual_cpu, cpu_possible_mask); - if (actual_cpu >= nr_cpu_ids) - actual_cpu = cpumask_first(cpu_possible_mask); - - atomic_lock_ptr[i] = &per_cpu(atomic_lock_pool, actual_cpu); - } - -#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ - /* Validate power-of-two and "bigger than cpus" assumption */ BUILD_BUG_ON(ATOMIC_HASH_SIZE & (ATOMIC_HASH_SIZE-1)); BUG_ON(ATOMIC_HASH_SIZE < nr_cpu_ids); @@ -279,6 +180,4 @@ void __init __init_atomic_per_cpu(void) * That should not produce more indices than ATOMIC_HASH_SIZE. */ BUILD_BUG_ON((PAGE_SIZE >> 3) > ATOMIC_HASH_SIZE); - -#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ } diff --git a/arch/tile/lib/atomic_asm_32.S b/arch/tile/lib/atomic_asm_32.S index 3063804..6bda313 100644 --- a/arch/tile/lib/atomic_asm_32.S +++ b/arch/tile/lib/atomic_asm_32.S @@ -164,6 +164,7 @@ STD_ENTRY_SECTION(__atomic\name, .text.atomic) STD_ENDPROC(__atomic\name) .ifc \bitwidth,32 .pushsection __ex_table,"a" + .align 4 .word 1b, __atomic\name .word 2b, __atomic\name .word __atomic\name, __atomic_bad_address diff --git a/arch/tile/lib/cacheflush.c b/arch/tile/lib/cacheflush.c index 8f8ad81..9c0ec22 100644 --- a/arch/tile/lib/cacheflush.c +++ b/arch/tile/lib/cacheflush.c @@ -36,7 +36,8 @@ static inline void force_load(char *p) * core (if "!hfh") or homed via hash-for-home (if "hfh"), waiting * until the memory controller holds the flushed values. */ -void finv_buffer_remote(void *buffer, size_t size, int hfh) +void __attribute__((optimize("omit-frame-pointer"))) +finv_buffer_remote(void *buffer, size_t size, int hfh) { char *p, *base; size_t step_size, load_count; @@ -147,18 +148,21 @@ void finv_buffer_remote(void *buffer, size_t size, int hfh) force_load(p); /* - * Repeat, but with inv's instead of loads, to get rid of the + * Repeat, but with finv's instead of loads, to get rid of the * data we just loaded into our own cache and the old home L3. - * No need to unroll since inv's don't target a register. + * No need to unroll since finv's don't target a register. + * The finv's are guaranteed not to actually flush the data in + * the buffer back to their home, since we just read it, so the + * lines are clean in cache; we will only invalidate those lines. */ p = (char *)buffer + size - 1; - __insn_inv(p); + __insn_finv(p); p -= step_size; p = (char *)((unsigned long)p | (step_size - 1)); for (; p >= base; p -= step_size) - __insn_inv(p); + __insn_finv(p); - /* Wait for the load+inv's (and thus finvs) to have completed. */ + /* Wait for these finv's (and thus the first finvs) to be done. */ __insn_mf(); #ifdef __tilegx__ diff --git a/arch/tile/lib/exports.c b/arch/tile/lib/exports.c index a93b02a..82733c8 100644 --- a/arch/tile/lib/exports.c +++ b/arch/tile/lib/exports.c @@ -22,7 +22,6 @@ EXPORT_SYMBOL(strnlen_user_asm); EXPORT_SYMBOL(strncpy_from_user_asm); EXPORT_SYMBOL(clear_user_asm); EXPORT_SYMBOL(flush_user_asm); -EXPORT_SYMBOL(inv_user_asm); EXPORT_SYMBOL(finv_user_asm); /* arch/tile/kernel/entry.S */ @@ -34,6 +33,12 @@ EXPORT_SYMBOL(dump_stack); /* arch/tile/kernel/head.S */ EXPORT_SYMBOL(empty_zero_page); +#ifdef CONFIG_FUNCTION_TRACER +/* arch/tile/kernel/mcount_64.S */ +#include <asm/ftrace.h> +EXPORT_SYMBOL(__mcount); +#endif /* CONFIG_FUNCTION_TRACER */ + /* arch/tile/lib/, various memcpy files */ EXPORT_SYMBOL(memcpy); EXPORT_SYMBOL(__copy_to_user_inatomic); diff --git a/arch/tile/lib/memchr_64.c b/arch/tile/lib/memchr_64.c index 6f867db..f8196b3 100644 --- a/arch/tile/lib/memchr_64.c +++ b/arch/tile/lib/memchr_64.c @@ -36,7 +36,7 @@ void *memchr(const void *s, int c, size_t n) p = (const uint64_t *)(s_int & -8); /* Create eight copies of the byte for which we are looking. */ - goal = 0x0101010101010101ULL * (uint8_t) c; + goal = copy_byte(c); /* Read the first word, but munge it so that bytes before the array * will not match goal. diff --git a/arch/tile/lib/memcpy_32.S b/arch/tile/lib/memcpy_32.S index 2a419a6..a2771ae 100644 --- a/arch/tile/lib/memcpy_32.S +++ b/arch/tile/lib/memcpy_32.S @@ -22,14 +22,6 @@ #include <linux/linkage.h> -/* On TILE64, we wrap these functions via arch/tile/lib/memcpy_tile64.c */ -#if !CHIP_HAS_COHERENT_LOCAL_CACHE() -#define memcpy __memcpy_asm -#define __copy_to_user_inatomic __copy_to_user_inatomic_asm -#define __copy_from_user_inatomic __copy_from_user_inatomic_asm -#define __copy_from_user_zeroing __copy_from_user_zeroing_asm -#endif - #define IS_MEMCPY 0 #define IS_COPY_FROM_USER 1 #define IS_COPY_FROM_USER_ZEROING 2 @@ -44,6 +36,7 @@ */ #define EX \ .pushsection __ex_table, "a"; \ + .align 4; \ .word 9f, memcpy_common_fixup; \ .popsection; \ 9 @@ -158,12 +151,9 @@ EX: { sw r0, r3; addi r0, r0, 4; addi r2, r2, -4 } { addi r3, r1, 60; andi r9, r9, -64 } -#if CHIP_HAS_WH64() /* No need to prefetch dst, we'll just do the wh64 * right before we copy a line. */ -#endif - EX: { lw r5, r3; addi r3, r3, 64; movei r4, 1 } /* Intentionally stall for a few cycles to leave L2 cache alone. */ { bnzt zero, .; move r27, lr } @@ -171,21 +161,6 @@ EX: { lw r6, r3; addi r3, r3, 64 } /* Intentionally stall for a few cycles to leave L2 cache alone. */ { bnzt zero, . } EX: { lw r7, r3; addi r3, r3, 64 } -#if !CHIP_HAS_WH64() - /* Prefetch the dest */ - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } - /* Use a real load to cause a TLB miss if necessary. We aren't using - * r28, so this should be fine. - */ -EX: { lw r28, r9; addi r9, r9, 64 } - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } - { prefetch r9; addi r9, r9, 64 } - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } - { prefetch r9; addi r9, r9, 64 } -#endif /* Intentionally stall for a few cycles to leave L2 cache alone. */ { bz zero, .Lbig_loop2 } @@ -286,13 +261,8 @@ EX: { lw r7, r3; addi r3, r3, 64 } /* Fill second L1D line. */ EX: { lw r17, r17; addi r1, r1, 48; mvz r3, r13, r1 } /* r17 = WORD_4 */ -#if CHIP_HAS_WH64() /* Prepare destination line for writing. */ EX: { wh64 r9; addi r9, r9, 64 } -#else - /* Prefetch dest line */ - { prefetch r9; addi r9, r9, 64 } -#endif /* Load seven words that are L1D hits to cover wh64 L2 usage. */ /* Load the three remaining words from the last L1D line, which @@ -330,16 +300,7 @@ EX: { lw r18, r1; addi r1, r1, 4 } /* r18 = WORD_8 */ EX: { sw r0, r16; addi r0, r0, 4; add r16, r0, r2 } /* store(WORD_0) */ EX: { sw r0, r13; addi r0, r0, 4; andi r16, r16, -64 } /* store(WORD_1) */ EX: { sw r0, r14; addi r0, r0, 4; slt_u r16, r9, r16 } /* store(WORD_2) */ -#if CHIP_HAS_WH64() EX: { sw r0, r15; addi r0, r0, 4; addi r13, sp, -64 } /* store(WORD_3) */ -#else - /* Back up the r9 to a cache line we are already storing to - * if it gets past the end of the dest vector. Strictly speaking, - * we don't need to back up to the start of a cache line, but it's free - * and tidy, so why not? - */ -EX: { sw r0, r15; addi r0, r0, 4; andi r13, r0, -64 } /* store(WORD_3) */ -#endif /* Store second L1D line. */ EX: { sw r0, r17; addi r0, r0, 4; mvz r9, r16, r13 }/* store(WORD_4) */ EX: { sw r0, r19; addi r0, r0, 4 } /* store(WORD_5) */ @@ -403,7 +364,6 @@ EX: { sb r0, r3; addi r0, r0, 1; addi r2, r2, -1 } .Ldest_is_word_aligned: -#if CHIP_HAS_DWORD_ALIGN() EX: { andi r8, r0, 63; lwadd_na r6, r1, 4} { slti_u r9, r2, 64; bz r8, .Ldest_is_L2_line_aligned } @@ -511,26 +471,6 @@ EX: { swadd r0, r13, 4; addi r2, r2, -32 } /* Move r1 back to the point where it corresponds to r0. */ { addi r1, r1, -4 } -#else /* !CHIP_HAS_DWORD_ALIGN() */ - - /* Compute right/left shift counts and load initial source words. */ - { andi r5, r1, -4; andi r3, r1, 3 } -EX: { lw r6, r5; addi r5, r5, 4; shli r3, r3, 3 } -EX: { lw r7, r5; addi r5, r5, 4; sub r4, zero, r3 } - - /* Load and store one word at a time, using shifts and ORs - * to correct for the misaligned src. - */ -.Lcopy_unaligned_src_loop: - { shr r6, r6, r3; shl r8, r7, r4 } -EX: { lw r7, r5; or r8, r8, r6; move r6, r7 } -EX: { sw r0, r8; addi r0, r0, 4; addi r2, r2, -4 } - { addi r5, r5, 4; slti_u r8, r2, 8 } - { bzt r8, .Lcopy_unaligned_src_loop; addi r1, r1, 4 } - - { bz r2, .Lcopy_unaligned_done } -#endif /* !CHIP_HAS_DWORD_ALIGN() */ - /* Fall through */ /* @@ -614,5 +554,6 @@ memcpy_fixup_loop: .size memcpy_common_fixup, . - memcpy_common_fixup .section __ex_table,"a" + .align 4 .word .Lcfu, .Lcopy_from_user_fixup_zero_remainder .word .Lctu, .Lcopy_to_user_fixup_done diff --git a/arch/tile/lib/memcpy_64.c b/arch/tile/lib/memcpy_64.c index c79b8e7..4815354 100644 --- a/arch/tile/lib/memcpy_64.c +++ b/arch/tile/lib/memcpy_64.c @@ -18,14 +18,17 @@ /* EXPORT_SYMBOL() is in arch/tile/lib/exports.c since this should be asm. */ /* Must be 8 bytes in size. */ -#define word_t uint64_t +#define op_t uint64_t -#if CHIP_L2_LINE_SIZE() != 64 && CHIP_L2_LINE_SIZE() != 128 -#error "Assumes 64 or 128 byte line size" +/* Threshold value for when to enter the unrolled loops. */ +#define OP_T_THRES 16 + +#if CHIP_L2_LINE_SIZE() != 64 +#error "Assumes 64 byte line size" #endif /* How many cache lines ahead should we prefetch? */ -#define PREFETCH_LINES_AHEAD 3 +#define PREFETCH_LINES_AHEAD 4 /* * Provide "base versions" of load and store for the normal code path. @@ -51,15 +54,16 @@ void *memcpy(void *__restrict dstv, const void *__restrict srcv, size_t n) * macros to return a count of uncopied bytes due to mm fault. */ #define RETVAL 0 -int USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n) +int __attribute__((optimize("omit-frame-pointer"))) +USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n) #endif { char *__restrict dst1 = (char *)dstv; const char *__restrict src1 = (const char *)srcv; const char *__restrict src1_end; const char *__restrict prefetch; - word_t *__restrict dst8; /* 8-byte pointer to destination memory. */ - word_t final; /* Final bytes to write to trailing word, if any */ + op_t *__restrict dst8; /* 8-byte pointer to destination memory. */ + op_t final; /* Final bytes to write to trailing word, if any */ long i; if (n < 16) { @@ -79,104 +83,228 @@ int USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n) for (i = 0; i < PREFETCH_LINES_AHEAD; i++) { __insn_prefetch(prefetch); prefetch += CHIP_L2_LINE_SIZE(); - prefetch = (prefetch > src1_end) ? prefetch : src1; + prefetch = (prefetch < src1_end) ? prefetch : src1; } /* Copy bytes until dst is word-aligned. */ - for (; (uintptr_t)dst1 & (sizeof(word_t) - 1); n--) + for (; (uintptr_t)dst1 & (sizeof(op_t) - 1); n--) ST1(dst1++, LD1(src1++)); /* 8-byte pointer to destination memory. */ - dst8 = (word_t *)dst1; - - if (__builtin_expect((uintptr_t)src1 & (sizeof(word_t) - 1), 0)) { - /* - * Misaligned copy. Copy 8 bytes at a time, but don't - * bother with other fanciness. - * - * TODO: Consider prefetching and using wh64 as well. - */ - - /* Create an aligned src8. */ - const word_t *__restrict src8 = - (const word_t *)((uintptr_t)src1 & -sizeof(word_t)); - word_t b; - - word_t a = LD8(src8++); - for (; n >= sizeof(word_t); n -= sizeof(word_t)) { - b = LD8(src8++); - a = __insn_dblalign(a, b, src1); - ST8(dst8++, a); - a = b; + dst8 = (op_t *)dst1; + + if (__builtin_expect((uintptr_t)src1 & (sizeof(op_t) - 1), 0)) { + /* Unaligned copy. */ + + op_t tmp0 = 0, tmp1 = 0, tmp2, tmp3; + const op_t *src8 = (const op_t *) ((uintptr_t)src1 & + -sizeof(op_t)); + const void *srci = (void *)src1; + int m; + + m = (CHIP_L2_LINE_SIZE() << 2) - + (((uintptr_t)dst8) & ((CHIP_L2_LINE_SIZE() << 2) - 1)); + m = (n < m) ? n : m; + m /= sizeof(op_t); + + /* Copy until 'dst' is cache-line-aligned. */ + n -= (sizeof(op_t) * m); + + switch (m % 4) { + case 0: + if (__builtin_expect(!m, 0)) + goto _M0; + tmp1 = LD8(src8++); + tmp2 = LD8(src8++); + goto _8B3; + case 2: + m += 2; + tmp3 = LD8(src8++); + tmp0 = LD8(src8++); + goto _8B1; + case 3: + m += 1; + tmp2 = LD8(src8++); + tmp3 = LD8(src8++); + goto _8B2; + case 1: + m--; + tmp0 = LD8(src8++); + tmp1 = LD8(src8++); + if (__builtin_expect(!m, 0)) + goto _8B0; + } + + do { + tmp2 = LD8(src8++); + tmp0 = __insn_dblalign(tmp0, tmp1, srci); + ST8(dst8++, tmp0); +_8B3: + tmp3 = LD8(src8++); + tmp1 = __insn_dblalign(tmp1, tmp2, srci); + ST8(dst8++, tmp1); +_8B2: + tmp0 = LD8(src8++); + tmp2 = __insn_dblalign(tmp2, tmp3, srci); + ST8(dst8++, tmp2); +_8B1: + tmp1 = LD8(src8++); + tmp3 = __insn_dblalign(tmp3, tmp0, srci); + ST8(dst8++, tmp3); + m -= 4; + } while (m); + +_8B0: + tmp0 = __insn_dblalign(tmp0, tmp1, srci); + ST8(dst8++, tmp0); + src8--; + +_M0: + if (__builtin_expect(n >= CHIP_L2_LINE_SIZE(), 0)) { + op_t tmp4, tmp5, tmp6, tmp7, tmp8; + + prefetch = ((const char *)src8) + + CHIP_L2_LINE_SIZE() * PREFETCH_LINES_AHEAD; + + for (tmp0 = LD8(src8++); n >= CHIP_L2_LINE_SIZE(); + n -= CHIP_L2_LINE_SIZE()) { + /* Prefetch and advance to next line to + prefetch, but don't go past the end. */ + __insn_prefetch(prefetch); + + /* Make sure prefetch got scheduled + earlier. */ + __asm__ ("" : : : "memory"); + + prefetch += CHIP_L2_LINE_SIZE(); + prefetch = (prefetch < src1_end) ? prefetch : + (const char *) src8; + + tmp1 = LD8(src8++); + tmp2 = LD8(src8++); + tmp3 = LD8(src8++); + tmp4 = LD8(src8++); + tmp5 = LD8(src8++); + tmp6 = LD8(src8++); + tmp7 = LD8(src8++); + tmp8 = LD8(src8++); + + tmp0 = __insn_dblalign(tmp0, tmp1, srci); + tmp1 = __insn_dblalign(tmp1, tmp2, srci); + tmp2 = __insn_dblalign(tmp2, tmp3, srci); + tmp3 = __insn_dblalign(tmp3, tmp4, srci); + tmp4 = __insn_dblalign(tmp4, tmp5, srci); + tmp5 = __insn_dblalign(tmp5, tmp6, srci); + tmp6 = __insn_dblalign(tmp6, tmp7, srci); + tmp7 = __insn_dblalign(tmp7, tmp8, srci); + + __insn_wh64(dst8); + + ST8(dst8++, tmp0); + ST8(dst8++, tmp1); + ST8(dst8++, tmp2); + ST8(dst8++, tmp3); + ST8(dst8++, tmp4); + ST8(dst8++, tmp5); + ST8(dst8++, tmp6); + ST8(dst8++, tmp7); + + tmp0 = tmp8; + } + src8--; + } + + /* Copy the rest 8-byte chunks. */ + if (n >= sizeof(op_t)) { + tmp0 = LD8(src8++); + for (; n >= sizeof(op_t); n -= sizeof(op_t)) { + tmp1 = LD8(src8++); + tmp0 = __insn_dblalign(tmp0, tmp1, srci); + ST8(dst8++, tmp0); + tmp0 = tmp1; + } + src8--; } if (n == 0) return RETVAL; - b = ((const char *)src8 <= src1_end) ? *src8 : 0; + tmp0 = LD8(src8++); + tmp1 = ((const char *)src8 <= src1_end) + ? LD8((op_t *)src8) : 0; + final = __insn_dblalign(tmp0, tmp1, srci); - /* - * Final source bytes to write to trailing partial - * word, if any. - */ - final = __insn_dblalign(a, b, src1); } else { /* Aligned copy. */ - const word_t* __restrict src8 = (const word_t *)src1; + const op_t *__restrict src8 = (const op_t *)src1; /* src8 and dst8 are both word-aligned. */ if (n >= CHIP_L2_LINE_SIZE()) { /* Copy until 'dst' is cache-line-aligned. */ for (; (uintptr_t)dst8 & (CHIP_L2_LINE_SIZE() - 1); - n -= sizeof(word_t)) + n -= sizeof(op_t)) ST8(dst8++, LD8(src8++)); for (; n >= CHIP_L2_LINE_SIZE(); ) { - __insn_wh64(dst8); + op_t tmp0, tmp1, tmp2, tmp3; + op_t tmp4, tmp5, tmp6, tmp7; /* * Prefetch and advance to next line - * to prefetch, but don't go past the end + * to prefetch, but don't go past the + * end. */ __insn_prefetch(prefetch); + + /* Make sure prefetch got scheduled + earlier. */ + __asm__ ("" : : : "memory"); + prefetch += CHIP_L2_LINE_SIZE(); - prefetch = (prefetch > src1_end) ? prefetch : + prefetch = (prefetch < src1_end) ? prefetch : (const char *)src8; /* - * Copy an entire cache line. Manually - * unrolled to avoid idiosyncracies of - * compiler unrolling. + * Do all the loads before wh64. This + * is necessary if [src8, src8+7] and + * [dst8, dst8+7] share the same cache + * line and dst8 <= src8, as can be + * the case when called from memmove, + * or with code tested on x86 whose + * memcpy always works with forward + * copies. */ -#define COPY_WORD(offset) ({ ST8(dst8+offset, LD8(src8+offset)); n -= 8; }) - COPY_WORD(0); - COPY_WORD(1); - COPY_WORD(2); - COPY_WORD(3); - COPY_WORD(4); - COPY_WORD(5); - COPY_WORD(6); - COPY_WORD(7); -#if CHIP_L2_LINE_SIZE() == 128 - COPY_WORD(8); - COPY_WORD(9); - COPY_WORD(10); - COPY_WORD(11); - COPY_WORD(12); - COPY_WORD(13); - COPY_WORD(14); - COPY_WORD(15); -#elif CHIP_L2_LINE_SIZE() != 64 -# error Fix code that assumes particular L2 cache line sizes -#endif + tmp0 = LD8(src8++); + tmp1 = LD8(src8++); + tmp2 = LD8(src8++); + tmp3 = LD8(src8++); + tmp4 = LD8(src8++); + tmp5 = LD8(src8++); + tmp6 = LD8(src8++); + tmp7 = LD8(src8++); + + /* wh64 and wait for tmp7 load completion. */ + __asm__ ("move %0, %0; wh64 %1\n" + : : "r"(tmp7), "r"(dst8)); - dst8 += CHIP_L2_LINE_SIZE() / sizeof(word_t); - src8 += CHIP_L2_LINE_SIZE() / sizeof(word_t); + ST8(dst8++, tmp0); + ST8(dst8++, tmp1); + ST8(dst8++, tmp2); + ST8(dst8++, tmp3); + ST8(dst8++, tmp4); + ST8(dst8++, tmp5); + ST8(dst8++, tmp6); + ST8(dst8++, tmp7); + + n -= CHIP_L2_LINE_SIZE(); } +#if CHIP_L2_LINE_SIZE() != 64 +# error "Fix code that assumes particular L2 cache line size." +#endif } - for (; n >= sizeof(word_t); n -= sizeof(word_t)) + for (; n >= sizeof(op_t); n -= sizeof(op_t)) ST8(dst8++, LD8(src8++)); if (__builtin_expect(n == 0, 1)) diff --git a/arch/tile/lib/memcpy_tile64.c b/arch/tile/lib/memcpy_tile64.c deleted file mode 100644 index 3bc4b4e..0000000 --- a/arch/tile/lib/memcpy_tile64.c +++ /dev/null @@ -1,276 +0,0 @@ -/* - * Copyright 2010 Tilera Corporation. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#include <linux/string.h> -#include <linux/smp.h> -#include <linux/module.h> -#include <linux/uaccess.h> -#include <asm/fixmap.h> -#include <asm/kmap_types.h> -#include <asm/tlbflush.h> -#include <hv/hypervisor.h> -#include <arch/chip.h> - - -#if !CHIP_HAS_COHERENT_LOCAL_CACHE() - -/* Defined in memcpy.S */ -extern unsigned long __memcpy_asm(void *to, const void *from, unsigned long n); -extern unsigned long __copy_to_user_inatomic_asm( - void __user *to, const void *from, unsigned long n); -extern unsigned long __copy_from_user_inatomic_asm( - void *to, const void __user *from, unsigned long n); -extern unsigned long __copy_from_user_zeroing_asm( - void *to, const void __user *from, unsigned long n); - -typedef unsigned long (*memcpy_t)(void *, const void *, unsigned long); - -/* Size above which to consider TLB games for performance */ -#define LARGE_COPY_CUTOFF 2048 - -/* Communicate to the simulator what we are trying to do. */ -#define sim_allow_multiple_caching(b) \ - __insn_mtspr(SPR_SIM_CONTROL, \ - SIM_CONTROL_ALLOW_MULTIPLE_CACHING | ((b) << _SIM_CONTROL_OPERATOR_BITS)) - -/* - * Copy memory by briefly enabling incoherent cacheline-at-a-time mode. - * - * We set up our own source and destination PTEs that we fully control. - * This is the only way to guarantee that we don't race with another - * thread that is modifying the PTE; we can't afford to try the - * copy_{to,from}_user() technique of catching the interrupt, since - * we must run with interrupts disabled to avoid the risk of some - * other code seeing the incoherent data in our cache. (Recall that - * our cache is indexed by PA, so even if the other code doesn't use - * our kmap_atomic virtual addresses, they'll still hit in cache using - * the normal VAs that aren't supposed to hit in cache.) - */ -static void memcpy_multicache(void *dest, const void *source, - pte_t dst_pte, pte_t src_pte, int len) -{ - int idx; - unsigned long flags, newsrc, newdst; - pmd_t *pmdp; - pte_t *ptep; - int type0, type1; - int cpu = get_cpu(); - - /* - * Disable interrupts so that we don't recurse into memcpy() - * in an interrupt handler, nor accidentally reference - * the PA of the source from an interrupt routine. Also - * notify the simulator that we're playing games so we don't - * generate spurious coherency warnings. - */ - local_irq_save(flags); - sim_allow_multiple_caching(1); - - /* Set up the new dest mapping */ - type0 = kmap_atomic_idx_push(); - idx = FIX_KMAP_BEGIN + (KM_TYPE_NR * cpu) + type0; - newdst = __fix_to_virt(idx) + ((unsigned long)dest & (PAGE_SIZE-1)); - pmdp = pmd_offset(pud_offset(pgd_offset_k(newdst), newdst), newdst); - ptep = pte_offset_kernel(pmdp, newdst); - if (pte_val(*ptep) != pte_val(dst_pte)) { - set_pte(ptep, dst_pte); - local_flush_tlb_page(NULL, newdst, PAGE_SIZE); - } - - /* Set up the new source mapping */ - type1 = kmap_atomic_idx_push(); - idx += (type0 - type1); - src_pte = hv_pte_set_nc(src_pte); - src_pte = hv_pte_clear_writable(src_pte); /* be paranoid */ - newsrc = __fix_to_virt(idx) + ((unsigned long)source & (PAGE_SIZE-1)); - pmdp = pmd_offset(pud_offset(pgd_offset_k(newsrc), newsrc), newsrc); - ptep = pte_offset_kernel(pmdp, newsrc); - __set_pte(ptep, src_pte); /* set_pte() would be confused by this */ - local_flush_tlb_page(NULL, newsrc, PAGE_SIZE); - - /* Actually move the data. */ - __memcpy_asm((void *)newdst, (const void *)newsrc, len); - - /* - * Remap the source as locally-cached and not OLOC'ed so that - * we can inval without also invaling the remote cpu's cache. - * This also avoids known errata with inv'ing cacheable oloc data. - */ - src_pte = hv_pte_set_mode(src_pte, HV_PTE_MODE_CACHE_NO_L3); - src_pte = hv_pte_set_writable(src_pte); /* need write access for inv */ - __set_pte(ptep, src_pte); /* set_pte() would be confused by this */ - local_flush_tlb_page(NULL, newsrc, PAGE_SIZE); - - /* - * Do the actual invalidation, covering the full L2 cache line - * at the end since __memcpy_asm() is somewhat aggressive. - */ - __inv_buffer((void *)newsrc, len); - - /* - * We're done: notify the simulator that all is back to normal, - * and re-enable interrupts and pre-emption. - */ - kmap_atomic_idx_pop(); - kmap_atomic_idx_pop(); - sim_allow_multiple_caching(0); - local_irq_restore(flags); - put_cpu(); -} - -/* - * Identify large copies from remotely-cached memory, and copy them - * via memcpy_multicache() if they look good, otherwise fall back - * to the particular kind of copying passed as the memcpy_t function. - */ -static unsigned long fast_copy(void *dest, const void *source, int len, - memcpy_t func) -{ - /* - * Check if it's big enough to bother with. We may end up doing a - * small copy via TLB manipulation if we're near a page boundary, - * but presumably we'll make it up when we hit the second page. - */ - while (len >= LARGE_COPY_CUTOFF) { - int copy_size, bytes_left_on_page; - pte_t *src_ptep, *dst_ptep; - pte_t src_pte, dst_pte; - struct page *src_page, *dst_page; - - /* Is the source page oloc'ed to a remote cpu? */ -retry_source: - src_ptep = virt_to_pte(current->mm, (unsigned long)source); - if (src_ptep == NULL) - break; - src_pte = *src_ptep; - if (!hv_pte_get_present(src_pte) || - !hv_pte_get_readable(src_pte) || - hv_pte_get_mode(src_pte) != HV_PTE_MODE_CACHE_TILE_L3) - break; - if (get_remote_cache_cpu(src_pte) == smp_processor_id()) - break; - src_page = pfn_to_page(pte_pfn(src_pte)); - get_page(src_page); - if (pte_val(src_pte) != pte_val(*src_ptep)) { - put_page(src_page); - goto retry_source; - } - if (pte_huge(src_pte)) { - /* Adjust the PTE to correspond to a small page */ - int pfn = pte_pfn(src_pte); - pfn += (((unsigned long)source & (HPAGE_SIZE-1)) - >> PAGE_SHIFT); - src_pte = pfn_pte(pfn, src_pte); - src_pte = pte_mksmall(src_pte); - } - - /* Is the destination page writable? */ -retry_dest: - dst_ptep = virt_to_pte(current->mm, (unsigned long)dest); - if (dst_ptep == NULL) { - put_page(src_page); - break; - } - dst_pte = *dst_ptep; - if (!hv_pte_get_present(dst_pte) || - !hv_pte_get_writable(dst_pte)) { - put_page(src_page); - break; - } - dst_page = pfn_to_page(pte_pfn(dst_pte)); - if (dst_page == src_page) { - /* - * Source and dest are on the same page; this - * potentially exposes us to incoherence if any - * part of src and dest overlap on a cache line. - * Just give up rather than trying to be precise. - */ - put_page(src_page); - break; - } - get_page(dst_page); - if (pte_val(dst_pte) != pte_val(*dst_ptep)) { - put_page(dst_page); - goto retry_dest; - } - if (pte_huge(dst_pte)) { - /* Adjust the PTE to correspond to a small page */ - int pfn = pte_pfn(dst_pte); - pfn += (((unsigned long)dest & (HPAGE_SIZE-1)) - >> PAGE_SHIFT); - dst_pte = pfn_pte(pfn, dst_pte); - dst_pte = pte_mksmall(dst_pte); - } - - /* All looks good: create a cachable PTE and copy from it */ - copy_size = len; - bytes_left_on_page = - PAGE_SIZE - (((int)source) & (PAGE_SIZE-1)); - if (copy_size > bytes_left_on_page) - copy_size = bytes_left_on_page; - bytes_left_on_page = - PAGE_SIZE - (((int)dest) & (PAGE_SIZE-1)); - if (copy_size > bytes_left_on_page) - copy_size = bytes_left_on_page; - memcpy_multicache(dest, source, dst_pte, src_pte, copy_size); - - /* Release the pages */ - put_page(dst_page); - put_page(src_page); - - /* Continue on the next page */ - dest += copy_size; - source += copy_size; - len -= copy_size; - } - - return func(dest, source, len); -} - -void *memcpy(void *to, const void *from, __kernel_size_t n) -{ - if (n < LARGE_COPY_CUTOFF) - return (void *)__memcpy_asm(to, from, n); - else - return (void *)fast_copy(to, from, n, __memcpy_asm); -} - -unsigned long __copy_to_user_inatomic(void __user *to, const void *from, - unsigned long n) -{ - if (n < LARGE_COPY_CUTOFF) - return __copy_to_user_inatomic_asm(to, from, n); - else - return fast_copy(to, from, n, __copy_to_user_inatomic_asm); -} - -unsigned long __copy_from_user_inatomic(void *to, const void __user *from, - unsigned long n) -{ - if (n < LARGE_COPY_CUTOFF) - return __copy_from_user_inatomic_asm(to, from, n); - else - return fast_copy(to, from, n, __copy_from_user_inatomic_asm); -} - -unsigned long __copy_from_user_zeroing(void *to, const void __user *from, - unsigned long n) -{ - if (n < LARGE_COPY_CUTOFF) - return __copy_from_user_zeroing_asm(to, from, n); - else - return fast_copy(to, from, n, __copy_from_user_zeroing_asm); -} - -#endif /* !CHIP_HAS_COHERENT_LOCAL_CACHE() */ diff --git a/arch/tile/lib/memcpy_user_64.c b/arch/tile/lib/memcpy_user_64.c index 37440ca..88c7016 100644 --- a/arch/tile/lib/memcpy_user_64.c +++ b/arch/tile/lib/memcpy_user_64.c @@ -31,6 +31,7 @@ ".pushsection .coldtext.memcpy,\"ax\";" \ "2: { move r0, %2; jrp lr };" \ ".section __ex_table,\"a\";" \ + ".align 8;" \ ".quad 1b, 2b;" \ ".popsection" \ : "=m" (*(p)) : "r" (v), "r" (n)); \ @@ -43,6 +44,7 @@ ".pushsection .coldtext.memcpy,\"ax\";" \ "2: { move r0, %2; jrp lr };" \ ".section __ex_table,\"a\";" \ + ".align 8;" \ ".quad 1b, 2b;" \ ".popsection" \ : "=r" (__v) : "m" (*(p)), "r" (n)); \ diff --git a/arch/tile/lib/memset_32.c b/arch/tile/lib/memset_32.c index 57dbb3a..2042bfe 100644 --- a/arch/tile/lib/memset_32.c +++ b/arch/tile/lib/memset_32.c @@ -12,13 +12,10 @@ * more details. */ -#include <arch/chip.h> - #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> - -#undef memset +#include <arch/chip.h> void *memset(void *s, int c, size_t n) { @@ -26,11 +23,7 @@ void *memset(void *s, int c, size_t n) int n32; uint32_t v16, v32; uint8_t *out8 = s; -#if !CHIP_HAS_WH64() - int ahead32; -#else int to_align32; -#endif /* Experimentation shows that a trivial tight loop is a win up until * around a size of 20, where writing a word at a time starts to win. @@ -61,21 +54,6 @@ void *memset(void *s, int c, size_t n) return s; } -#if !CHIP_HAS_WH64() - /* Use a spare issue slot to start prefetching the first cache - * line early. This instruction is free as the store can be buried - * in otherwise idle issue slots doing ALU ops. - */ - __insn_prefetch(out8); - - /* We prefetch the end so that a short memset that spans two cache - * lines gets some prefetching benefit. Again we believe this is free - * to issue. - */ - __insn_prefetch(&out8[n - 1]); -#endif /* !CHIP_HAS_WH64() */ - - /* Align 'out8'. We know n >= 3 so this won't write past the end. */ while (((uintptr_t) out8 & 3) != 0) { *out8++ = c; @@ -96,90 +74,6 @@ void *memset(void *s, int c, size_t n) /* This must be at least 8 or the following loop doesn't work. */ #define CACHE_LINE_SIZE_IN_WORDS (CHIP_L2_LINE_SIZE() / 4) -#if !CHIP_HAS_WH64() - - ahead32 = CACHE_LINE_SIZE_IN_WORDS; - - /* We already prefetched the first and last cache lines, so - * we only need to do more prefetching if we are storing - * to more than two cache lines. - */ - if (n32 > CACHE_LINE_SIZE_IN_WORDS * 2) { - int i; - - /* Prefetch the next several cache lines. - * This is the setup code for the software-pipelined - * loop below. - */ -#define MAX_PREFETCH 5 - ahead32 = n32 & -CACHE_LINE_SIZE_IN_WORDS; - if (ahead32 > MAX_PREFETCH * CACHE_LINE_SIZE_IN_WORDS) - ahead32 = MAX_PREFETCH * CACHE_LINE_SIZE_IN_WORDS; - - for (i = CACHE_LINE_SIZE_IN_WORDS; - i < ahead32; i += CACHE_LINE_SIZE_IN_WORDS) - __insn_prefetch(&out32[i]); - } - - if (n32 > ahead32) { - while (1) { - int j; - - /* Prefetch by reading one word several cache lines - * ahead. Since loads are non-blocking this will - * cause the full cache line to be read while we are - * finishing earlier cache lines. Using a store - * here causes microarchitectural performance - * problems where a victimizing store miss goes to - * the head of the retry FIFO and locks the pipe for - * a few cycles. So a few subsequent stores in this - * loop go into the retry FIFO, and then later - * stores see other stores to the same cache line - * are already in the retry FIFO and themselves go - * into the retry FIFO, filling it up and grinding - * to a halt waiting for the original miss to be - * satisfied. - */ - __insn_prefetch(&out32[ahead32]); - -#if CACHE_LINE_SIZE_IN_WORDS % 4 != 0 -#error "Unhandled CACHE_LINE_SIZE_IN_WORDS" -#endif - - n32 -= CACHE_LINE_SIZE_IN_WORDS; - - /* Save icache space by only partially unrolling - * this loop. - */ - for (j = CACHE_LINE_SIZE_IN_WORDS / 4; j > 0; j--) { - *out32++ = v32; - *out32++ = v32; - *out32++ = v32; - *out32++ = v32; - } - - /* To save compiled code size, reuse this loop even - * when we run out of prefetching to do by dropping - * ahead32 down. - */ - if (n32 <= ahead32) { - /* Not even a full cache line left, - * so stop now. - */ - if (n32 < CACHE_LINE_SIZE_IN_WORDS) - break; - - /* Choose a small enough value that we don't - * prefetch past the end. There's no sense - * in touching cache lines we don't have to. - */ - ahead32 = CACHE_LINE_SIZE_IN_WORDS - 1; - } - } - } - -#else /* CHIP_HAS_WH64() */ - /* Determine how many words we need to emit before the 'out32' * pointer becomes aligned modulo the cache line size. */ @@ -236,8 +130,6 @@ void *memset(void *s, int c, size_t n) n32 &= CACHE_LINE_SIZE_IN_WORDS - 1; } -#endif /* CHIP_HAS_WH64() */ - /* Now handle any leftover values. */ if (n32 != 0) { do { diff --git a/arch/tile/lib/memset_64.c b/arch/tile/lib/memset_64.c index 3873085..03ef69c 100644 --- a/arch/tile/lib/memset_64.c +++ b/arch/tile/lib/memset_64.c @@ -12,13 +12,11 @@ * more details. */ -#include <arch/chip.h> - #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> - -#undef memset +#include <arch/chip.h> +#include "string-endian.h" void *memset(void *s, int c, size_t n) { @@ -70,8 +68,7 @@ void *memset(void *s, int c, size_t n) n64 = n >> 3; /* Tile input byte out to 64 bits. */ - /* KLUDGE */ - v64 = 0x0101010101010101ULL * (uint8_t)c; + v64 = copy_byte(c); /* This must be at least 8 or the following loop doesn't work. */ #define CACHE_LINE_SIZE_IN_DOUBLEWORDS (CHIP_L2_LINE_SIZE() / 8) diff --git a/arch/tile/lib/strchr_32.c b/arch/tile/lib/strchr_32.c index c94e6f7..841fe69 100644 --- a/arch/tile/lib/strchr_32.c +++ b/arch/tile/lib/strchr_32.c @@ -16,8 +16,6 @@ #include <linux/string.h> #include <linux/module.h> -#undef strchr - char *strchr(const char *s, int c) { int z, g; diff --git a/arch/tile/lib/strchr_64.c b/arch/tile/lib/strchr_64.c index f39f9dc..fe6e31c 100644 --- a/arch/tile/lib/strchr_64.c +++ b/arch/tile/lib/strchr_64.c @@ -26,7 +26,7 @@ char *strchr(const char *s, int c) const uint64_t *p = (const uint64_t *)(s_int & -8); /* Create eight copies of the byte for which we are looking. */ - const uint64_t goal = 0x0101010101010101ULL * (uint8_t) c; + const uint64_t goal = copy_byte(c); /* Read the first aligned word, but force bytes before the string to * match neither zero nor goal (we make sure the high bit of each diff --git a/arch/tile/lib/string-endian.h b/arch/tile/lib/string-endian.h index c0eed7c..2e49cbf 100644 --- a/arch/tile/lib/string-endian.h +++ b/arch/tile/lib/string-endian.h @@ -1,5 +1,5 @@ /* - * Copyright 2011 Tilera Corporation. All Rights Reserved. + * Copyright 2013 Tilera Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -31,3 +31,14 @@ #define CFZ(x) __insn_clz(x) #define REVCZ(x) __insn_ctz(x) #endif + +/* + * Create eight copies of the byte in a uint64_t. Byte Shuffle uses + * the bytes of srcB as the index into the dest vector to select a + * byte. With all indices of zero, the first byte is copied into all + * the other bytes. + */ +static inline uint64_t copy_byte(uint8_t byte) +{ + return __insn_shufflebytes(byte, 0, 0); +} diff --git a/arch/tile/lib/strlen_32.c b/arch/tile/lib/strlen_32.c index 4974292..f26f88e 100644 --- a/arch/tile/lib/strlen_32.c +++ b/arch/tile/lib/strlen_32.c @@ -16,8 +16,6 @@ #include <linux/string.h> #include <linux/module.h> -#undef strlen - size_t strlen(const char *s) { /* Get an aligned pointer. */ diff --git a/arch/tile/lib/strnlen_32.c b/arch/tile/lib/strnlen_32.c new file mode 100644 index 0000000..1434141 --- /dev/null +++ b/arch/tile/lib/strnlen_32.c @@ -0,0 +1,47 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/types.h> +#include <linux/string.h> +#include <linux/module.h> + +size_t strnlen(const char *s, size_t count) +{ + /* Get an aligned pointer. */ + const uintptr_t s_int = (uintptr_t) s; + const uint32_t *p = (const uint32_t *)(s_int & -4); + size_t bytes_read = sizeof(*p) - (s_int & (sizeof(*p) - 1)); + size_t len; + uint32_t v, bits; + + /* Avoid page fault risk by not reading any bytes when count is 0. */ + if (count == 0) + return 0; + + /* Read first word, but force bytes before the string to be nonzero. */ + v = *p | ((1 << ((s_int << 3) & 31)) - 1); + + while ((bits = __insn_seqb(v, 0)) == 0) { + if (bytes_read >= count) { + /* Read COUNT bytes and didn't find the terminator. */ + return count; + } + v = *++p; + bytes_read += sizeof(v); + } + + len = ((const char *) p) + (__insn_ctz(bits) >> 3) - s; + return (len < count ? len : count); +} +EXPORT_SYMBOL(strnlen); diff --git a/arch/tile/lib/strnlen_64.c b/arch/tile/lib/strnlen_64.c new file mode 100644 index 0000000..2e8de6a --- /dev/null +++ b/arch/tile/lib/strnlen_64.c @@ -0,0 +1,48 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#include <linux/types.h> +#include <linux/string.h> +#include <linux/module.h> +#include "string-endian.h" + +size_t strnlen(const char *s, size_t count) +{ + /* Get an aligned pointer. */ + const uintptr_t s_int = (uintptr_t) s; + const uint64_t *p = (const uint64_t *)(s_int & -8); + size_t bytes_read = sizeof(*p) - (s_int & (sizeof(*p) - 1)); + size_t len; + uint64_t v, bits; + + /* Avoid page fault risk by not reading any bytes when count is 0. */ + if (count == 0) + return 0; + + /* Read and MASK the first word. */ + v = *p | MASK(s_int); + + while ((bits = __insn_v1cmpeqi(v, 0)) == 0) { + if (bytes_read >= count) { + /* Read COUNT bytes and didn't find the terminator. */ + return count; + } + v = *++p; + bytes_read += sizeof(v); + } + + len = ((const char *) p) + (CFZ(bits) >> 3) - s; + return (len < count ? len : count); +} +EXPORT_SYMBOL(strnlen); diff --git a/arch/tile/lib/usercopy_32.S b/arch/tile/lib/usercopy_32.S index b62d002..1bc1622 100644 --- a/arch/tile/lib/usercopy_32.S +++ b/arch/tile/lib/usercopy_32.S @@ -36,6 +36,7 @@ strnlen_user_fault: { move r0, zero; jrp lr } ENDPROC(strnlen_user_fault) .section __ex_table,"a" + .align 4 .word 1b, strnlen_user_fault .popsection @@ -47,18 +48,20 @@ strnlen_user_fault: */ STD_ENTRY(strncpy_from_user_asm) { bz r2, 2f; move r3, r0 } -1: { lb_u r4, r1; addi r1, r1, 1; addi r2, r2, -1 } +1: { lb_u r4, r1; addi r1, r1, 1; addi r2, r2, -1 } { sb r0, r4; addi r0, r0, 1 } - bz r2, 2f - bnzt r4, 1b - addi r0, r0, -1 /* don't count the trailing NUL */ -2: { sub r0, r0, r3; jrp lr } + bz r4, 2f + bnzt r2, 1b + { sub r0, r0, r3; jrp lr } +2: addi r0, r0, -1 /* don't count the trailing NUL */ + { sub r0, r0, r3; jrp lr } STD_ENDPROC(strncpy_from_user_asm) .pushsection .fixup,"ax" strncpy_from_user_fault: { movei r0, -EFAULT; jrp lr } ENDPROC(strncpy_from_user_fault) .section __ex_table,"a" + .align 4 .word 1b, strncpy_from_user_fault .popsection @@ -77,6 +80,7 @@ STD_ENTRY(clear_user_asm) bnzt r1, 1b 2: { move r0, r1; jrp lr } .pushsection __ex_table,"a" + .align 4 .word 1b, 2b .popsection @@ -86,6 +90,7 @@ STD_ENTRY(clear_user_asm) 2: { move r0, r1; jrp lr } STD_ENDPROC(clear_user_asm) .pushsection __ex_table,"a" + .align 4 .word 1b, 2b .popsection @@ -105,25 +110,7 @@ STD_ENTRY(flush_user_asm) 2: { move r0, r1; jrp lr } STD_ENDPROC(flush_user_asm) .pushsection __ex_table,"a" - .word 1b, 2b - .popsection - -/* - * inv_user_asm takes the user target address in r0 and the - * number of bytes to invalidate in r1. - * It returns the number of not inv'able bytes (hopefully zero) in r0. - */ -STD_ENTRY(inv_user_asm) - bz r1, 2f - { movei r2, L2_CACHE_BYTES; add r1, r0, r1 } - { sub r2, zero, r2; addi r1, r1, L2_CACHE_BYTES-1 } - { and r0, r0, r2; and r1, r1, r2 } - { sub r1, r1, r0 } -1: { inv r0; addi r1, r1, -CHIP_INV_STRIDE() } - { addi r0, r0, CHIP_INV_STRIDE(); bnzt r1, 1b } -2: { move r0, r1; jrp lr } - STD_ENDPROC(inv_user_asm) - .pushsection __ex_table,"a" + .align 4 .word 1b, 2b .popsection @@ -143,5 +130,6 @@ STD_ENTRY(finv_user_asm) 2: { move r0, r1; jrp lr } STD_ENDPROC(finv_user_asm) .pushsection __ex_table,"a" + .align 4 .word 1b, 2b .popsection diff --git a/arch/tile/lib/usercopy_64.S b/arch/tile/lib/usercopy_64.S index adb2dbb..b3b31a3 100644 --- a/arch/tile/lib/usercopy_64.S +++ b/arch/tile/lib/usercopy_64.S @@ -36,6 +36,7 @@ strnlen_user_fault: { move r0, zero; jrp lr } ENDPROC(strnlen_user_fault) .section __ex_table,"a" + .align 8 .quad 1b, strnlen_user_fault .popsection @@ -47,18 +48,20 @@ strnlen_user_fault: */ STD_ENTRY(strncpy_from_user_asm) { beqz r2, 2f; move r3, r0 } -1: { ld1u r4, r1; addi r1, r1, 1; addi r2, r2, -1 } +1: { ld1u r4, r1; addi r1, r1, 1; addi r2, r2, -1 } { st1 r0, r4; addi r0, r0, 1 } - beqz r2, 2f - bnezt r4, 1b - addi r0, r0, -1 /* don't count the trailing NUL */ -2: { sub r0, r0, r3; jrp lr } + beqz r4, 2f + bnezt r2, 1b + { sub r0, r0, r3; jrp lr } +2: addi r0, r0, -1 /* don't count the trailing NUL */ + { sub r0, r0, r3; jrp lr } STD_ENDPROC(strncpy_from_user_asm) .pushsection .fixup,"ax" strncpy_from_user_fault: { movei r0, -EFAULT; jrp lr } ENDPROC(strncpy_from_user_fault) .section __ex_table,"a" + .align 8 .quad 1b, strncpy_from_user_fault .popsection @@ -77,6 +80,7 @@ STD_ENTRY(clear_user_asm) bnezt r1, 1b 2: { move r0, r1; jrp lr } .pushsection __ex_table,"a" + .align 8 .quad 1b, 2b .popsection @@ -86,6 +90,7 @@ STD_ENTRY(clear_user_asm) 2: { move r0, r1; jrp lr } STD_ENDPROC(clear_user_asm) .pushsection __ex_table,"a" + .align 8 .quad 1b, 2b .popsection @@ -105,25 +110,7 @@ STD_ENTRY(flush_user_asm) 2: { move r0, r1; jrp lr } STD_ENDPROC(flush_user_asm) .pushsection __ex_table,"a" - .quad 1b, 2b - .popsection - -/* - * inv_user_asm takes the user target address in r0 and the - * number of bytes to invalidate in r1. - * It returns the number of not inv'able bytes (hopefully zero) in r0. - */ -STD_ENTRY(inv_user_asm) - beqz r1, 2f - { movei r2, L2_CACHE_BYTES; add r1, r0, r1 } - { sub r2, zero, r2; addi r1, r1, L2_CACHE_BYTES-1 } - { and r0, r0, r2; and r1, r1, r2 } - { sub r1, r1, r0 } -1: { inv r0; addi r1, r1, -CHIP_INV_STRIDE() } - { addi r0, r0, CHIP_INV_STRIDE(); bnezt r1, 1b } -2: { move r0, r1; jrp lr } - STD_ENDPROC(inv_user_asm) - .pushsection __ex_table,"a" + .align 8 .quad 1b, 2b .popsection @@ -143,5 +130,6 @@ STD_ENTRY(finv_user_asm) 2: { move r0, r1; jrp lr } STD_ENDPROC(finv_user_asm) .pushsection __ex_table,"a" + .align 8 .quad 1b, 2b .popsection diff --git a/arch/tile/mm/elf.c b/arch/tile/mm/elf.c index 743c951..23f044e 100644 --- a/arch/tile/mm/elf.c +++ b/arch/tile/mm/elf.c @@ -21,7 +21,8 @@ #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/sections.h> -#include <arch/sim_def.h> +#include <asm/vdso.h> +#include <arch/sim.h> /* Notify a running simulator, if any, that an exec just occurred. */ static void sim_notify_exec(const char *binary_name) @@ -38,21 +39,55 @@ static void sim_notify_exec(const char *binary_name) static int notify_exec(struct mm_struct *mm) { - int retval = 0; /* failure */ - - if (mm->exe_file) { - char *buf = (char *) __get_free_page(GFP_KERNEL); - if (buf) { - char *path = d_path(&mm->exe_file->f_path, - buf, PAGE_SIZE); - if (!IS_ERR(path)) { - sim_notify_exec(path); - retval = 1; - } - free_page((unsigned long)buf); + char *buf, *path; + struct vm_area_struct *vma; + + if (!sim_is_simulator()) + return 1; + + if (mm->exe_file == NULL) + return 0; + + for (vma = current->mm->mmap; ; vma = vma->vm_next) { + if (vma == NULL) + return 0; + if (vma->vm_file == mm->exe_file) + break; + } + + buf = (char *) __get_free_page(GFP_KERNEL); + if (buf == NULL) + return 0; + + path = d_path(&mm->exe_file->f_path, buf, PAGE_SIZE); + if (IS_ERR(path)) { + free_page((unsigned long)buf); + return 0; + } + + /* + * Notify simulator of an ET_DYN object so we know the load address. + * The somewhat cryptic overuse of SIM_CONTROL_DLOPEN allows us + * to be backward-compatible with older simulator releases. + */ + if (vma->vm_start == (ELF_ET_DYN_BASE & PAGE_MASK)) { + char buf[64]; + int i; + + snprintf(buf, sizeof(buf), "0x%lx:@", vma->vm_start); + for (i = 0; ; ++i) { + char c = buf[i]; + __insn_mtspr(SPR_SIM_CONTROL, + (SIM_CONTROL_DLOPEN + | (c << _SIM_CONTROL_OPERATOR_BITS))); + if (c == '\0') + break; } } - return retval; + + sim_notify_exec(path); + free_page((unsigned long)buf); + return 1; } /* Notify a running simulator, if any, that we loaded an interpreter. */ @@ -68,37 +103,10 @@ static void sim_notify_interp(unsigned long load_addr) } -/* Kernel address of page used to map read-only kernel data into userspace. */ -static void *vdso_page; - -/* One-entry array used for install_special_mapping. */ -static struct page *vdso_pages[1]; - -static int __init vdso_setup(void) -{ - vdso_page = (void *)get_zeroed_page(GFP_ATOMIC); - memcpy(vdso_page, __rt_sigreturn, __rt_sigreturn_end - __rt_sigreturn); - vdso_pages[0] = virt_to_page(vdso_page); - return 0; -} -device_initcall(vdso_setup); - -const char *arch_vma_name(struct vm_area_struct *vma) -{ - if (vma->vm_private_data == vdso_pages) - return "[vdso]"; -#ifndef __tilegx__ - if (vma->vm_start == MEM_USER_INTRPT) - return "[intrpt]"; -#endif - return NULL; -} - int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack) { struct mm_struct *mm = current->mm; - unsigned long vdso_base; int retval = 0; down_write(&mm->mmap_sem); @@ -111,14 +119,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, if (!notify_exec(mm)) sim_notify_exec(bprm->filename); - /* - * MAYWRITE to allow gdb to COW and set breakpoints - */ - vdso_base = VDSO_BASE; - retval = install_special_mapping(mm, vdso_base, PAGE_SIZE, - VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, - vdso_pages); + retval = setup_vdso_pages(); #ifndef __tilegx__ /* diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index f7f99f9..111d5a9 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -34,6 +34,7 @@ #include <linux/hugetlb.h> #include <linux/syscalls.h> #include <linux/uaccess.h> +#include <linux/kdebug.h> #include <asm/pgalloc.h> #include <asm/sections.h> @@ -122,10 +123,9 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address) pmd_k = pmd_offset(pud_k, address); if (!pmd_present(*pmd_k)) return NULL; - if (!pmd_present(*pmd)) { + if (!pmd_present(*pmd)) set_pmd(pmd, *pmd_k); - arch_flush_lazy_mmu_mode(); - } else + else BUG_ON(pmd_ptfn(*pmd) != pmd_ptfn(*pmd_k)); return pmd_k; } @@ -283,7 +283,7 @@ static int handle_page_fault(struct pt_regs *regs, flags = (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | (write ? FAULT_FLAG_WRITE : 0)); - is_kernel_mode = (EX1_PL(regs->ex1) != USER_PL); + is_kernel_mode = !user_mode(regs); tsk = validate_current(); @@ -466,28 +466,15 @@ good_area: } } -#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() - /* - * If this was an asynchronous fault, - * restart the appropriate engine. - */ - switch (fault_num) { #if CHIP_HAS_TILE_DMA() + /* If this was a DMA TLB fault, restart the DMA engine. */ + switch (fault_num) { case INT_DMATLB_MISS: case INT_DMATLB_MISS_DWNCL: case INT_DMATLB_ACCESS: case INT_DMATLB_ACCESS_DWNCL: __insn_mtspr(SPR_DMA_CTR, SPR_DMA_CTR__REQUEST_MASK); break; -#endif -#if CHIP_HAS_SN_PROC() - case INT_SNITLB_MISS: - case INT_SNITLB_MISS_DWNCL: - __insn_mtspr(SPR_SNCTL, - __insn_mfspr(SPR_SNCTL) & - ~SPR_SNCTL__FRZPROC_MASK); - break; -#endif } #endif @@ -722,8 +709,60 @@ void do_page_fault(struct pt_regs *regs, int fault_num, { int is_page_fault; +#ifdef CONFIG_KPROBES + /* + * This is to notify the fault handler of the kprobes. The + * exception code is redundant as it is also carried in REGS, + * but we pass it anyhow. + */ + if (notify_die(DIE_PAGE_FAULT, "page fault", regs, -1, + regs->faultnum, SIGSEGV) == NOTIFY_STOP) + return; +#endif + +#ifdef __tilegx__ + /* + * We don't need early do_page_fault_ics() support, since unlike + * Pro we don't need to worry about unlocking the atomic locks. + * There is only one current case in GX where we touch any memory + * under ICS other than our own kernel stack, and we handle that + * here. (If we crash due to trying to touch our own stack, + * we're in too much trouble for C code to help out anyway.) + */ + if (write & ~1) { + unsigned long pc = write & ~1; + if (pc >= (unsigned long) __start_unalign_asm_code && + pc < (unsigned long) __end_unalign_asm_code) { + struct thread_info *ti = current_thread_info(); + /* + * Our EX_CONTEXT is still what it was from the + * initial unalign exception, but now we've faulted + * on the JIT page. We would like to complete the + * page fault however is appropriate, and then retry + * the instruction that caused the unalign exception. + * Our state has been "corrupted" by setting the low + * bit in "sp", and stashing r0..r3 in the + * thread_info area, so we revert all of that, then + * continue as if this were a normal page fault. + */ + regs->sp &= ~1UL; + regs->regs[0] = ti->unalign_jit_tmp[0]; + regs->regs[1] = ti->unalign_jit_tmp[1]; + regs->regs[2] = ti->unalign_jit_tmp[2]; + regs->regs[3] = ti->unalign_jit_tmp[3]; + write &= 1; + } else { + pr_alert("%s/%d: ICS set at page fault at %#lx: %#lx\n", + current->comm, current->pid, pc, address); + show_regs(regs); + do_group_exit(SIGKILL); + return; + } + } +#else /* This case should have been handled by do_page_fault_ics(). */ BUG_ON(write & ~1); +#endif #if CHIP_HAS_TILE_DMA() /* @@ -752,10 +791,6 @@ void do_page_fault(struct pt_regs *regs, int fault_num, case INT_DMATLB_MISS: case INT_DMATLB_MISS_DWNCL: #endif -#if CHIP_HAS_SN_PROC() - case INT_SNITLB_MISS: - case INT_SNITLB_MISS_DWNCL: -#endif is_page_fault = 1; break; @@ -771,8 +806,8 @@ void do_page_fault(struct pt_regs *regs, int fault_num, panic("Bad fault number %d in do_page_fault", fault_num); } -#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() - if (EX1_PL(regs->ex1) != USER_PL) { +#if CHIP_HAS_TILE_DMA() + if (!user_mode(regs)) { struct async_tlb *async; switch (fault_num) { #if CHIP_HAS_TILE_DMA() @@ -783,12 +818,6 @@ void do_page_fault(struct pt_regs *regs, int fault_num, async = ¤t->thread.dma_async_tlb; break; #endif -#if CHIP_HAS_SN_PROC() - case INT_SNITLB_MISS: - case INT_SNITLB_MISS_DWNCL: - async = ¤t->thread.sn_async_tlb; - break; -#endif default: async = NULL; } @@ -821,14 +850,22 @@ void do_page_fault(struct pt_regs *regs, int fault_num, } -#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() +#if CHIP_HAS_TILE_DMA() /* - * Check an async_tlb structure to see if a deferred fault is waiting, - * and if so pass it to the page-fault code. + * This routine effectively re-issues asynchronous page faults + * when we are returning to user space. */ -static void handle_async_page_fault(struct pt_regs *regs, - struct async_tlb *async) +void do_async_page_fault(struct pt_regs *regs) { + struct async_tlb *async = ¤t->thread.dma_async_tlb; + + /* + * Clear thread flag early. If we re-interrupt while processing + * code here, we will reset it and recall this routine before + * returning to user space. + */ + clear_thread_flag(TIF_ASYNC_TLB); + if (async->fault_num) { /* * Clear async->fault_num before calling the page-fault @@ -842,35 +879,15 @@ static void handle_async_page_fault(struct pt_regs *regs, async->address, async->is_write); } } - -/* - * This routine effectively re-issues asynchronous page faults - * when we are returning to user space. - */ -void do_async_page_fault(struct pt_regs *regs) -{ - /* - * Clear thread flag early. If we re-interrupt while processing - * code here, we will reset it and recall this routine before - * returning to user space. - */ - clear_thread_flag(TIF_ASYNC_TLB); - -#if CHIP_HAS_TILE_DMA() - handle_async_page_fault(regs, ¤t->thread.dma_async_tlb); -#endif -#if CHIP_HAS_SN_PROC() - handle_async_page_fault(regs, ¤t->thread.sn_async_tlb); -#endif -} -#endif /* CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() */ +#endif /* CHIP_HAS_TILE_DMA() */ void vmalloc_sync_all(void) { #ifdef __tilegx__ /* Currently all L1 kernel pmd's are static and shared. */ - BUG_ON(pgd_index(VMALLOC_END) != pgd_index(VMALLOC_START)); + BUILD_BUG_ON(pgd_index(VMALLOC_END - PAGE_SIZE) != + pgd_index(VMALLOC_START)); #else /* * Note that races in the updates of insync and start aren't diff --git a/arch/tile/mm/highmem.c b/arch/tile/mm/highmem.c index 347d123..0dc2182 100644 --- a/arch/tile/mm/highmem.c +++ b/arch/tile/mm/highmem.c @@ -114,7 +114,6 @@ static void kmap_atomic_register(struct page *page, int type, list_add(&->list, &_list); set_pte(ptep, pteval); - arch_flush_lazy_mmu_mode(); spin_unlock(&_lock); homecache_kpte_unlock(flags); @@ -259,7 +258,6 @@ void __kunmap_atomic(void *kvaddr) BUG_ON(vaddr >= (unsigned long)high_memory); } - arch_flush_lazy_mmu_mode(); pagefault_enable(); } EXPORT_SYMBOL(__kunmap_atomic); diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c index 1ae9119..004ba56 100644 --- a/arch/tile/mm/homecache.c +++ b/arch/tile/mm/homecache.c @@ -43,12 +43,9 @@ #include "migrate.h" -#if CHIP_HAS_COHERENT_LOCAL_CACHE() - /* * The noallocl2 option suppresses all use of the L2 cache to cache - * locally from a remote home. There's no point in using it if we - * don't have coherent local caching, though. + * locally from a remote home. */ static int __write_once noallocl2; static int __init set_noallocl2(char *str) @@ -58,12 +55,6 @@ static int __init set_noallocl2(char *str) } early_param("noallocl2", set_noallocl2); -#else - -#define noallocl2 0 - -#endif - /* * Update the irq_stat for cpus that we are going to interrupt @@ -172,7 +163,8 @@ void flush_remote(unsigned long cache_pfn, unsigned long cache_control, static void homecache_finv_page_va(void* va, int home) { - if (home == smp_processor_id()) { + int cpu = get_cpu(); + if (home == cpu) { finv_buffer_local(va, PAGE_SIZE); } else if (home == PAGE_HOME_HASH) { finv_buffer_remote(va, PAGE_SIZE, 1); @@ -180,6 +172,7 @@ static void homecache_finv_page_va(void* va, int home) BUG_ON(home < 0 || home >= NR_CPUS); finv_buffer_remote(va, PAGE_SIZE, 0); } + put_cpu(); } void homecache_finv_map_page(struct page *page, int home) @@ -198,7 +191,7 @@ void homecache_finv_map_page(struct page *page, int home) #else va = __fix_to_virt(FIX_HOMECACHE_BEGIN + smp_processor_id()); #endif - ptep = virt_to_pte(NULL, (unsigned long)va); + ptep = virt_to_kpte(va); pte = pfn_pte(page_to_pfn(page), PAGE_KERNEL); __set_pte(ptep, pte_set_home(pte, home)); homecache_finv_page_va((void *)va, home); @@ -263,10 +256,8 @@ static int pte_to_home(pte_t pte) return PAGE_HOME_INCOHERENT; case HV_PTE_MODE_UNCACHED: return PAGE_HOME_UNCACHED; -#if CHIP_HAS_CBOX_HOME_MAP() case HV_PTE_MODE_CACHE_HASH_L3: return PAGE_HOME_HASH; -#endif } panic("Bad PTE %#llx\n", pte.val); } @@ -323,20 +314,16 @@ pte_t pte_set_home(pte_t pte, int home) HV_PTE_MODE_CACHE_NO_L3); } } else -#if CHIP_HAS_CBOX_HOME_MAP() if (hash_default) pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_HASH_L3); else -#endif pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_NO_L3); pte = hv_pte_set_nc(pte); break; -#if CHIP_HAS_CBOX_HOME_MAP() case PAGE_HOME_HASH: pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_HASH_L3); break; -#endif default: BUG_ON(home < 0 || home >= NR_CPUS || @@ -346,7 +333,6 @@ pte_t pte_set_home(pte_t pte, int home) break; } -#if CHIP_HAS_NC_AND_NOALLOC_BITS() if (noallocl2) pte = hv_pte_set_no_alloc_l2(pte); @@ -355,7 +341,6 @@ pte_t pte_set_home(pte_t pte, int home) hv_pte_get_mode(pte) == HV_PTE_MODE_CACHE_NO_L3) { pte = hv_pte_set_mode(pte, HV_PTE_MODE_UNCACHED); } -#endif /* Checking this case here gives a better panic than from the hv. */ BUG_ON(hv_pte_get_mode(pte) == 0); @@ -371,19 +356,13 @@ EXPORT_SYMBOL(pte_set_home); * so they're not suitable for anything but infrequent use. */ -#if CHIP_HAS_CBOX_HOME_MAP() -static inline int initial_page_home(void) { return PAGE_HOME_HASH; } -#else -static inline int initial_page_home(void) { return 0; } -#endif - int page_home(struct page *page) { if (PageHighMem(page)) { - return initial_page_home(); + return PAGE_HOME_HASH; } else { unsigned long kva = (unsigned long)page_address(page); - return pte_to_home(*virt_to_pte(NULL, kva)); + return pte_to_home(*virt_to_kpte(kva)); } } EXPORT_SYMBOL(page_home); @@ -402,7 +381,7 @@ void homecache_change_page_home(struct page *page, int order, int home) NULL, 0); for (i = 0; i < pages; ++i, kva += PAGE_SIZE) { - pte_t *ptep = virt_to_pte(NULL, kva); + pte_t *ptep = virt_to_kpte(kva); pte_t pteval = *ptep; BUG_ON(!pte_present(pteval) || pte_huge(pteval)); __set_pte(ptep, pte_set_home(pteval, home)); @@ -436,7 +415,7 @@ struct page *homecache_alloc_pages_node(int nid, gfp_t gfp_mask, void __homecache_free_pages(struct page *page, unsigned int order) { if (put_page_testzero(page)) { - homecache_change_page_home(page, order, initial_page_home()); + homecache_change_page_home(page, order, PAGE_HOME_HASH); if (order == 0) { free_hot_cold_page(page, 0); } else { diff --git a/arch/tile/mm/hugetlbpage.c b/arch/tile/mm/hugetlbpage.c index 650ccff..e514899 100644 --- a/arch/tile/mm/hugetlbpage.c +++ b/arch/tile/mm/hugetlbpage.c @@ -49,38 +49,6 @@ int huge_shift[HUGE_SHIFT_ENTRIES] = { #endif }; -/* - * This routine is a hybrid of pte_alloc_map() and pte_alloc_kernel(). - * It assumes that L2 PTEs are never in HIGHMEM (we don't support that). - * It locks the user pagetable, and bumps up the mm->nr_ptes field, - * but otherwise allocate the page table using the kernel versions. - */ -static pte_t *pte_alloc_hugetlb(struct mm_struct *mm, pmd_t *pmd, - unsigned long address) -{ - pte_t *new; - - if (pmd_none(*pmd)) { - new = pte_alloc_one_kernel(mm, address); - if (!new) - return NULL; - - smp_wmb(); /* See comment in __pte_alloc */ - - spin_lock(&mm->page_table_lock); - if (likely(pmd_none(*pmd))) { /* Has another populated it ? */ - mm->nr_ptes++; - pmd_populate_kernel(mm, pmd, new); - new = NULL; - } else - VM_BUG_ON(pmd_trans_splitting(*pmd)); - spin_unlock(&mm->page_table_lock); - if (new) - pte_free_kernel(mm, new); - } - - return pte_offset_kernel(pmd, address); -} #endif pte_t *huge_pte_alloc(struct mm_struct *mm, @@ -109,7 +77,7 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, else { if (sz != PAGE_SIZE << huge_shift[HUGE_SHIFT_PAGE]) panic("Unexpected page size %#lx\n", sz); - return pte_alloc_hugetlb(mm, pmd, addr); + return pte_alloc_map(mm, NULL, pmd, addr); } } #else @@ -144,14 +112,14 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) /* Get the top-level page table entry. */ pgd = (pgd_t *)get_pte((pte_t *)mm->pgd, pgd_index(addr), 0); - if (!pgd_present(*pgd)) - return NULL; /* We don't have four levels. */ pud = pud_offset(pgd, addr); #ifndef __PAGETABLE_PUD_FOLDED # error support fourth page table level #endif + if (!pud_present(*pud)) + return NULL; /* Check for an L0 huge PTE, if we have three levels. */ #ifndef __PAGETABLE_PMD_FOLDED diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c index e182958..4e316deb 100644 --- a/arch/tile/mm/init.c +++ b/arch/tile/mm/init.c @@ -106,10 +106,8 @@ pte_t *get_prealloc_pte(unsigned long pfn) */ static int initial_heap_home(void) { -#if CHIP_HAS_CBOX_HOME_MAP() if (hash_default) return PAGE_HOME_HASH; -#endif return smp_processor_id(); } @@ -190,14 +188,11 @@ static void __init page_table_range_init(unsigned long start, } -#if CHIP_HAS_CBOX_HOME_MAP() - static int __initdata ktext_hash = 1; /* .text pages */ static int __initdata kdata_hash = 1; /* .data and .bss pages */ int __write_once hash_default = 1; /* kernel allocator pages */ EXPORT_SYMBOL(hash_default); int __write_once kstack_hash = 1; /* if no homecaching, use h4h */ -#endif /* CHIP_HAS_CBOX_HOME_MAP */ /* * CPUs to use to for striping the pages of kernel data. If hash-for-home @@ -215,14 +210,12 @@ int __write_once kdata_huge; /* if no homecaching, small pages */ static pgprot_t __init construct_pgprot(pgprot_t prot, int home) { prot = pte_set_home(prot, home); -#if CHIP_HAS_CBOX_HOME_MAP() if (home == PAGE_HOME_IMMUTABLE) { if (ktext_hash) prot = hv_pte_set_mode(prot, HV_PTE_MODE_CACHE_HASH_L3); else prot = hv_pte_set_mode(prot, HV_PTE_MODE_CACHE_NO_L3); } -#endif return prot; } @@ -234,22 +227,17 @@ static pgprot_t __init init_pgprot(ulong address) { int cpu; unsigned long page; - enum { CODE_DELTA = MEM_SV_INTRPT - PAGE_OFFSET }; + enum { CODE_DELTA = MEM_SV_START - PAGE_OFFSET }; -#if CHIP_HAS_CBOX_HOME_MAP() /* For kdata=huge, everything is just hash-for-home. */ if (kdata_huge) return construct_pgprot(PAGE_KERNEL, PAGE_HOME_HASH); -#endif /* We map the aliased pages of permanent text inaccessible. */ if (address < (ulong) _sinittext - CODE_DELTA) return PAGE_NONE; - /* - * We map read-only data non-coherent for performance. We could - * use neighborhood caching on TILE64, but it's not clear it's a win. - */ + /* We map read-only data non-coherent for performance. */ if ((address >= (ulong) __start_rodata && address < (ulong) __end_rodata) || address == (ulong) empty_zero_page) { @@ -257,12 +245,10 @@ static pgprot_t __init init_pgprot(ulong address) } #ifndef __tilegx__ -#if !ATOMIC_LOCKS_FOUND_VIA_TABLE() /* Force the atomic_locks[] array page to be hash-for-home. */ if (address == (ulong) atomic_locks) return construct_pgprot(PAGE_KERNEL, PAGE_HOME_HASH); #endif -#endif /* * Everything else that isn't data or bss is heap, so mark it @@ -280,19 +266,9 @@ static pgprot_t __init init_pgprot(ulong address) if (address >= (ulong) _end || address < (ulong) _einitdata) return construct_pgprot(PAGE_KERNEL, initial_heap_home()); -#if CHIP_HAS_CBOX_HOME_MAP() /* Use hash-for-home if requested for data/bss. */ if (kdata_hash) return construct_pgprot(PAGE_KERNEL, PAGE_HOME_HASH); -#endif - - /* - * Make the w1data homed like heap to start with, to avoid - * making it part of the page-striped data area when we're just - * going to convert it to read-only soon anyway. - */ - if (address >= (ulong)__w1data_begin && address < (ulong)__w1data_end) - return construct_pgprot(PAGE_KERNEL, initial_heap_home()); /* * Otherwise we just hand out consecutive cpus. To avoid @@ -301,7 +277,7 @@ static pgprot_t __init init_pgprot(ulong address) * the requested address, while walking cpu home around kdata_mask. * This is typically no more than a dozen or so iterations. */ - page = (((ulong)__w1data_end) + PAGE_SIZE - 1) & PAGE_MASK; + page = (((ulong)__end_rodata) + PAGE_SIZE - 1) & PAGE_MASK; BUG_ON(address < page || address >= (ulong)_end); cpu = cpumask_first(&kdata_mask); for (; page < address; page += PAGE_SIZE) { @@ -311,11 +287,9 @@ static pgprot_t __init init_pgprot(ulong address) if (page == (ulong)empty_zero_page) continue; #ifndef __tilegx__ -#if !ATOMIC_LOCKS_FOUND_VIA_TABLE() if (page == (ulong)atomic_locks) continue; #endif -#endif cpu = cpumask_next(cpu, &kdata_mask); if (cpu == NR_CPUS) cpu = cpumask_first(&kdata_mask); @@ -358,7 +332,7 @@ static int __init setup_ktext(char *str) ktext_arg_seen = 1; - /* Default setting on Tile64: use a huge page */ + /* Default setting: use a huge page */ if (strcmp(str, "huge") == 0) pr_info("ktext: using one huge locally cached page\n"); @@ -404,10 +378,8 @@ static inline pgprot_t ktext_set_nocache(pgprot_t prot) { if (!ktext_nocache) prot = hv_pte_set_nc(prot); -#if CHIP_HAS_NC_AND_NOALLOC_BITS() else prot = hv_pte_set_no_alloc_l2(prot); -#endif return prot; } @@ -440,7 +412,6 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) struct cpumask kstripe_mask; int rc, i; -#if CHIP_HAS_CBOX_HOME_MAP() if (ktext_arg_seen && ktext_hash) { pr_warning("warning: \"ktext\" boot argument ignored" " if \"kcache_hash\" sets up text hash-for-home\n"); @@ -457,7 +428,6 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) " kcache_hash=all or =allbutstack\n"); kdata_huge = 0; } -#endif /* * Set up a mask for cpus to use for kernel striping. @@ -538,7 +508,7 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) } } - address = MEM_SV_INTRPT; + address = MEM_SV_START; pmd = get_pmd(pgtables, address); pfn = 0; /* code starts at PA 0 */ if (ktext_small) { @@ -585,13 +555,11 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) } else { pte_t pteval = pfn_pte(0, PAGE_KERNEL_EXEC); pteval = pte_mkhuge(pteval); -#if CHIP_HAS_CBOX_HOME_MAP() if (ktext_hash) { pteval = hv_pte_set_mode(pteval, HV_PTE_MODE_CACHE_HASH_L3); pteval = ktext_set_nocache(pteval); } else -#endif /* CHIP_HAS_CBOX_HOME_MAP() */ if (cpumask_weight(&ktext_mask) == 1) { pteval = set_remote_cache_cpu(pteval, cpumask_first(&ktext_mask)); @@ -777,10 +745,7 @@ void __init paging_init(void) kernel_physical_mapping_init(pgd_base); - /* - * Fixed mappings, only the page table structure has to be - * created - mappings will be set by set_fixmap(): - */ + /* Fixed mappings, only the page table structure has to be created. */ page_table_range_init(fix_to_virt(__end_of_fixed_addresses - 1), FIXADDR_TOP, pgd_base); @@ -941,26 +906,6 @@ void __init pgtable_cache_init(void) panic("pgtable_cache_init(): Cannot create pgd cache"); } -#if !CHIP_HAS_COHERENT_LOCAL_CACHE() -/* - * The __w1data area holds data that is only written during initialization, - * and is read-only and thus freely cacheable thereafter. Fix the page - * table entries that cover that region accordingly. - */ -static void mark_w1data_ro(void) -{ - /* Loop over page table entries */ - unsigned long addr = (unsigned long)__w1data_begin; - BUG_ON((addr & (PAGE_SIZE-1)) != 0); - for (; addr <= (unsigned long)__w1data_end - 1; addr += PAGE_SIZE) { - unsigned long pfn = kaddr_to_pfn((void *)addr); - pte_t *ptep = virt_to_pte(NULL, addr); - BUG_ON(pte_huge(*ptep)); /* not relevant for kdata_huge */ - set_pte_at(&init_mm, addr, ptep, pfn_pte(pfn, PAGE_KERNEL_RO)); - } -} -#endif - #ifdef CONFIG_DEBUG_PAGEALLOC static long __write_once initfree; #else @@ -1000,7 +945,7 @@ static void free_init_pages(char *what, unsigned long begin, unsigned long end) */ int pfn = kaddr_to_pfn((void *)addr); struct page *page = pfn_to_page(pfn); - pte_t *ptep = virt_to_pte(NULL, addr); + pte_t *ptep = virt_to_kpte(addr); if (!initfree) { /* * If debugging page accesses then do not free @@ -1024,15 +969,11 @@ static void free_init_pages(char *what, unsigned long begin, unsigned long end) void free_initmem(void) { - const unsigned long text_delta = MEM_SV_INTRPT - PAGE_OFFSET; + const unsigned long text_delta = MEM_SV_START - PAGE_OFFSET; /* - * Evict the dirty initdata on the boot cpu, evict the w1data - * wherever it's homed, and evict all the init code everywhere. - * We are guaranteed that no one will touch the init pages any - * more, and although other cpus may be touching the w1data, - * we only actually change the caching on tile64, which won't - * be keeping local copies in the other tiles' caches anyway. + * Evict the cache on all cores to avoid incoherence. + * We are guaranteed that no one will touch the init pages any more. */ homecache_evict(&cpu_cacheable_map); @@ -1043,26 +984,11 @@ void free_initmem(void) /* * Free the pages mapped from 0xc0000000 that correspond to code - * pages from MEM_SV_INTRPT that we won't use again after init. + * pages from MEM_SV_START that we won't use again after init. */ free_init_pages("unused kernel text", (unsigned long)_sinittext - text_delta, (unsigned long)_einittext - text_delta); - -#if !CHIP_HAS_COHERENT_LOCAL_CACHE() - /* - * Upgrade the .w1data section to globally cached. - * We don't do this on tilepro, since the cache architecture - * pretty much makes it irrelevant, and in any case we end - * up having racing issues with other tiles that may touch - * the data after we flush the cache but before we update - * the PTEs and flush the TLBs, causing sharer shootdowns - * later. Even though this is to clean data, it seems like - * an unnecessary complication. - */ - mark_w1data_ro(); -#endif - /* Do a global TLB flush so everyone sees the changes. */ flush_tlb_all(); } diff --git a/arch/tile/mm/migrate_32.S b/arch/tile/mm/migrate_32.S index 5305814..7720854 100644 --- a/arch/tile/mm/migrate_32.S +++ b/arch/tile/mm/migrate_32.S @@ -136,7 +136,7 @@ STD_ENTRY(flush_and_install_context) move r8, zero /* asids */ move r9, zero /* asidcount */ } - jal hv_flush_remote + jal _hv_flush_remote bnz r0, .Ldone /* Now install the new page table. */ @@ -152,7 +152,7 @@ STD_ENTRY(flush_and_install_context) move r4, r_asid moveli r5, HV_CTX_DIRECTIO | CTX_PAGE_FLAG } - jal hv_install_context + jal _hv_install_context bnz r0, .Ldone /* Finally, flush the TLB. */ diff --git a/arch/tile/mm/migrate_64.S b/arch/tile/mm/migrate_64.S index 1d15b108..a49eee3 100644 --- a/arch/tile/mm/migrate_64.S +++ b/arch/tile/mm/migrate_64.S @@ -123,7 +123,7 @@ STD_ENTRY(flush_and_install_context) } { move r8, zero /* asidcount */ - jal hv_flush_remote + jal _hv_flush_remote } bnez r0, 1f @@ -136,7 +136,7 @@ STD_ENTRY(flush_and_install_context) move r2, r_asid moveli r3, HV_CTX_DIRECTIO | CTX_PAGE_FLAG } - jal hv_install_context + jal _hv_install_context bnez r0, 1f /* Finally, flush the TLB. */ diff --git a/arch/tile/mm/mmap.c b/arch/tile/mm/mmap.c index d67d91e..851a94e 100644 --- a/arch/tile/mm/mmap.c +++ b/arch/tile/mm/mmap.c @@ -58,16 +58,36 @@ void arch_pick_mmap_layout(struct mm_struct *mm) #else int is_32bit = 0; #endif + unsigned long random_factor = 0UL; + + /* + * 8 bits of randomness in 32bit mmaps, 24 address space bits + * 12 bits of randomness in 64bit mmaps, 28 address space bits + */ + if (current->flags & PF_RANDOMIZE) { + if (is_32bit) + random_factor = get_random_int() % (1<<8); + else + random_factor = get_random_int() % (1<<12); + + random_factor <<= PAGE_SHIFT; + } /* * Use standard layout if the expected stack growth is unlimited * or we are running native 64 bits. */ - if (!is_32bit || rlimit(RLIMIT_STACK) == RLIM_INFINITY) { - mm->mmap_base = TASK_UNMAPPED_BASE; + if (rlimit(RLIMIT_STACK) == RLIM_INFINITY) { + mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; mm->get_unmapped_area = arch_get_unmapped_area; } else { mm->mmap_base = mmap_base(mm); mm->get_unmapped_area = arch_get_unmapped_area_topdown; } } + +unsigned long arch_randomize_brk(struct mm_struct *mm) +{ + unsigned long range_end = mm->brk + 0x02000000; + return randomize_range(mm->brk, range_end, 0) ? : mm->brk; +} diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c index dfd63ce..2deaddf 100644 --- a/arch/tile/mm/pgtable.c +++ b/arch/tile/mm/pgtable.c @@ -83,55 +83,6 @@ void show_mem(unsigned int filter) } } -/* - * Associate a virtual page frame with a given physical page frame - * and protection flags for that frame. - */ -static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags) -{ - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - pgd = swapper_pg_dir + pgd_index(vaddr); - if (pgd_none(*pgd)) { - BUG(); - return; - } - pud = pud_offset(pgd, vaddr); - if (pud_none(*pud)) { - BUG(); - return; - } - pmd = pmd_offset(pud, vaddr); - if (pmd_none(*pmd)) { - BUG(); - return; - } - pte = pte_offset_kernel(pmd, vaddr); - /* <pfn,flags> stored as-is, to permit clearing entries */ - set_pte(pte, pfn_pte(pfn, flags)); - - /* - * It's enough to flush this one mapping. - * This appears conservative since it is only called - * from __set_fixmap. - */ - local_flush_tlb_page(NULL, vaddr, PAGE_SIZE); -} - -void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t flags) -{ - unsigned long address = __fix_to_virt(idx); - - if (idx >= __end_of_fixed_addresses) { - BUG(); - return; - } - set_pte_pfn(address, phys >> PAGE_SHIFT, flags); -} - /** * shatter_huge_page() - ensure a given address is mapped by a small page. * @@ -374,6 +325,17 @@ void ptep_set_wrprotect(struct mm_struct *mm, #endif +/* + * Return a pointer to the PTE that corresponds to the given + * address in the given page table. A NULL page table just uses + * the standard kernel page table; the preferred API in this case + * is virt_to_kpte(). + * + * The returned pointer can point to a huge page in other levels + * of the page table than the bottom, if the huge page is present + * in the page table. For bottom-level PTEs, the returned pointer + * can point to a PTE that is either present or not. + */ pte_t *virt_to_pte(struct mm_struct* mm, unsigned long addr) { pgd_t *pgd; @@ -387,13 +349,23 @@ pte_t *virt_to_pte(struct mm_struct* mm, unsigned long addr) pud = pud_offset(pgd, addr); if (!pud_present(*pud)) return NULL; + if (pud_huge_page(*pud)) + return (pte_t *)pud; pmd = pmd_offset(pud, addr); - if (pmd_huge_page(*pmd)) - return (pte_t *)pmd; if (!pmd_present(*pmd)) return NULL; + if (pmd_huge_page(*pmd)) + return (pte_t *)pmd; return pte_offset_kernel(pmd, addr); } +EXPORT_SYMBOL(virt_to_pte); + +pte_t *virt_to_kpte(unsigned long kaddr) +{ + BUG_ON(kaddr < PAGE_OFFSET); + return virt_to_pte(NULL, kaddr); +} +EXPORT_SYMBOL(virt_to_kpte); pgprot_t set_remote_cache_cpu(pgprot_t prot, int cpu) { @@ -568,7 +540,7 @@ void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size, addr = area->addr; if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, phys_addr, pgprot)) { - remove_vm_area((void *)(PAGE_MASK & (unsigned long) addr)); + free_vm_area(area); return NULL; } return (__force void __iomem *) (offset + (char *)addr); diff --git a/drivers/edac/tile_edac.c b/drivers/edac/tile_edac.c index a082053..578f915 100644 --- a/drivers/edac/tile_edac.c +++ b/drivers/edac/tile_edac.c @@ -257,7 +257,6 @@ static void __exit tile_edac_exit(void) if (!pdev) continue; - platform_set_drvdata(pdev, NULL); platform_device_unregister(pdev); } platform_driver_unregister(&tile_edac_mc_driver); diff --git a/drivers/tty/hvc/hvc_tile.c b/drivers/tty/hvc/hvc_tile.c index 7a84a05..af8cdaa 100644 --- a/drivers/tty/hvc/hvc_tile.c +++ b/drivers/tty/hvc/hvc_tile.c @@ -18,16 +18,46 @@ #include <linux/delay.h> #include <linux/err.h> #include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/moduleparam.h> +#include <linux/platform_device.h> #include <linux/types.h> +#include <asm/setup.h> +#include <arch/sim_def.h> + #include <hv/hypervisor.h> #include "hvc_console.h" +static int use_sim_console; +static int __init sim_console(char *str) +{ + use_sim_console = 1; + return 0; +} +early_param("sim_console", sim_console); + +int tile_console_write(const char *buf, int count) +{ + if (unlikely(use_sim_console)) { + int i; + for (i = 0; i < count; ++i) + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PUTC | + (buf[i] << _SIM_CONTROL_OPERATOR_BITS)); + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PUTC | + (SIM_PUTC_FLUSH_BINARY << + _SIM_CONTROL_OPERATOR_BITS)); + return 0; + } else { + return hv_console_write((HV_VirtAddr)buf, count); + } +} + static int hvc_tile_put_chars(uint32_t vt, const char *buf, int count) { - return hv_console_write((HV_VirtAddr)buf, count); + return tile_console_write(buf, count); } static int hvc_tile_get_chars(uint32_t vt, char *buf, int count) @@ -44,25 +74,132 @@ static int hvc_tile_get_chars(uint32_t vt, char *buf, int count) return i; } +#ifdef __tilegx__ +/* + * IRQ based callbacks. + */ +static int hvc_tile_notifier_add_irq(struct hvc_struct *hp, int irq) +{ + int rc; + int cpu = raw_smp_processor_id(); /* Choose an arbitrary cpu */ + HV_Coord coord = { .x = cpu_x(cpu), .y = cpu_y(cpu) }; + + rc = notifier_add_irq(hp, irq); + if (rc) + return rc; + + /* + * Request that the hypervisor start sending us interrupts. + * If the hypervisor returns an error, we still return 0, so that + * we can fall back to polling. + */ + if (hv_console_set_ipi(KERNEL_PL, irq, coord) < 0) + notifier_del_irq(hp, irq); + + return 0; +} + +static void hvc_tile_notifier_del_irq(struct hvc_struct *hp, int irq) +{ + HV_Coord coord = { 0, 0 }; + + /* Tell the hypervisor to stop sending us interrupts. */ + hv_console_set_ipi(KERNEL_PL, -1, coord); + + notifier_del_irq(hp, irq); +} + +static void hvc_tile_notifier_hangup_irq(struct hvc_struct *hp, int irq) +{ + hvc_tile_notifier_del_irq(hp, irq); +} +#endif + static const struct hv_ops hvc_tile_get_put_ops = { .get_chars = hvc_tile_get_chars, .put_chars = hvc_tile_put_chars, +#ifdef __tilegx__ + .notifier_add = hvc_tile_notifier_add_irq, + .notifier_del = hvc_tile_notifier_del_irq, + .notifier_hangup = hvc_tile_notifier_hangup_irq, +#endif +}; + + +#ifdef __tilegx__ +static int hvc_tile_probe(struct platform_device *pdev) +{ + struct hvc_struct *hp; + int tile_hvc_irq; + + /* Create our IRQ and register it. */ + tile_hvc_irq = create_irq(); + if (tile_hvc_irq < 0) + return -ENXIO; + + tile_irq_activate(tile_hvc_irq, TILE_IRQ_PERCPU); + hp = hvc_alloc(0, tile_hvc_irq, &hvc_tile_get_put_ops, 128); + if (IS_ERR(hp)) { + destroy_irq(tile_hvc_irq); + return PTR_ERR(hp); + } + dev_set_drvdata(&pdev->dev, hp); + + return 0; +} + +static int hvc_tile_remove(struct platform_device *pdev) +{ + int rc; + struct hvc_struct *hp = dev_get_drvdata(&pdev->dev); + + rc = hvc_remove(hp); + if (rc == 0) + destroy_irq(hp->data); + + return rc; +} + +static void hvc_tile_shutdown(struct platform_device *pdev) +{ + struct hvc_struct *hp = dev_get_drvdata(&pdev->dev); + + hvc_tile_notifier_del_irq(hp, hp->data); +} + +static struct platform_device hvc_tile_pdev = { + .name = "hvc-tile", + .id = 0, +}; + +static struct platform_driver hvc_tile_driver = { + .probe = hvc_tile_probe, + .remove = hvc_tile_remove, + .shutdown = hvc_tile_shutdown, + .driver = { + .name = "hvc-tile", + .owner = THIS_MODULE, + } }; +#endif static int __init hvc_tile_console_init(void) { - extern void disable_early_printk(void); hvc_instantiate(0, 0, &hvc_tile_get_put_ops); add_preferred_console("hvc", 0, NULL); - disable_early_printk(); return 0; } console_initcall(hvc_tile_console_init); static int __init hvc_tile_init(void) { - struct hvc_struct *s; - s = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128); - return IS_ERR(s) ? PTR_ERR(s) : 0; +#ifndef __tilegx__ + struct hvc_struct *hp; + hp = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128); + return IS_ERR(hp) ? PTR_ERR(hp) : 0; +#else + platform_device_register(&hvc_tile_pdev); + return platform_driver_register(&hvc_tile_driver); +#endif } device_initcall(hvc_tile_init); diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index cc4c868..47c6e7b 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1439,6 +1439,15 @@ config SERIAL_EFM32_UART_CONSOLE depends on SERIAL_EFM32_UART=y select SERIAL_CORE_CONSOLE +config SERIAL_TILEGX + tristate "TILE-Gx on-chip serial port support" + depends on TILEGX + select TILE_GXIO_UART + select SERIAL_CORE + ---help--- + This device provides access to the on-chip UARTs on the TILE-Gx + processor. + config SERIAL_ARC tristate "ARC UART driver support" select SERIAL_CORE diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 47b679c..3068c77 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o obj-$(CONFIG_SERIAL_ST_ASC) += st-asc.o +obj-$(CONFIG_SERIAL_TILEGX) += tilegx.o obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o obj-$(CONFIG_SERIAL_QE) += ucc_uart.o obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o diff --git a/drivers/tty/serial/tilegx.c b/drivers/tty/serial/tilegx.c new file mode 100644 index 0000000..f92d7e6 --- /dev/null +++ b/drivers/tty/serial/tilegx.c @@ -0,0 +1,708 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * TILEGx UART driver. + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/serial_core.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> + +#include <gxio/common.h> +#include <gxio/iorpc_globals.h> +#include <gxio/iorpc_uart.h> +#include <gxio/kiorpc.h> + +#include <hv/drv_uart_intf.h> + +/* + * Use device name ttyS, major 4, minor 64-65. + * This is the usual serial port name, 8250 conventional range. + */ +#define TILEGX_UART_MAJOR TTY_MAJOR +#define TILEGX_UART_MINOR 64 +#define TILEGX_UART_NAME "ttyS" +#define DRIVER_NAME_STRING "TILEGx_Serial" +#define TILEGX_UART_REF_CLK 125000000; /* REF_CLK is always 125 MHz. */ + +struct tile_uart_port { + /* UART port. */ + struct uart_port uart; + + /* GXIO device context. */ + gxio_uart_context_t context; + + /* UART access mutex. */ + struct mutex mutex; + + /* CPU receiving interrupts. */ + int irq_cpu; +}; + +static struct tile_uart_port tile_uart_ports[TILEGX_UART_NR]; +static struct uart_driver tilegx_uart_driver; + + +/* + * Read UART rx fifo, and insert the chars into tty buffer. + */ +static void receive_chars(struct tile_uart_port *tile_uart, + struct tty_struct *tty) +{ + int i; + char c; + UART_FIFO_COUNT_t count; + gxio_uart_context_t *context = &tile_uart->context; + struct tty_port *port = tty->port; + + count.word = gxio_uart_read(context, UART_FIFO_COUNT); + for (i = 0; i < count.rfifo_count; i++) { + c = (char)gxio_uart_read(context, UART_RECEIVE_DATA); + tty_insert_flip_char(port, c, TTY_NORMAL); + } +} + + +/* + * Drain the Rx FIFO, called by interrupt handler. + */ +static void handle_receive(struct tile_uart_port *tile_uart) +{ + struct tty_port *port = &tile_uart->uart.state->port; + struct tty_struct *tty = tty_port_tty_get(port); + gxio_uart_context_t *context = &tile_uart->context; + + if (!tty) + return; + + /* First read UART rx fifo. */ + receive_chars(tile_uart, tty); + + /* Reset RFIFO_WE interrupt. */ + gxio_uart_write(context, UART_INTERRUPT_STATUS, + UART_INTERRUPT_MASK__RFIFO_WE_MASK); + + /* Final read, if any chars comes between the first read and + * the interrupt reset. + */ + receive_chars(tile_uart, tty); + + spin_unlock(&tile_uart->uart.lock); + tty_flip_buffer_push(port); + spin_lock(&tile_uart->uart.lock); + tty_kref_put(tty); +} + + +/* + * Push one char to UART Write FIFO. + * Return 0 on success, -1 if write filo is full. + */ +static int tilegx_putchar(gxio_uart_context_t *context, char c) +{ + UART_FLAG_t flag; + flag.word = gxio_uart_read(context, UART_FLAG); + if (flag.wfifo_full) + return -1; + + gxio_uart_write(context, UART_TRANSMIT_DATA, (unsigned long)c); + return 0; +} + + +/* + * Send chars to UART Write FIFO; called by interrupt handler. + */ +static void handle_transmit(struct tile_uart_port *tile_uart) +{ + unsigned char ch; + struct uart_port *port; + struct circ_buf *xmit; + gxio_uart_context_t *context = &tile_uart->context; + + /* First reset WFIFO_RE interrupt. */ + gxio_uart_write(context, UART_INTERRUPT_STATUS, + UART_INTERRUPT_MASK__WFIFO_RE_MASK); + + port = &tile_uart->uart; + xmit = &port->state->xmit; + if (port->x_char) { + if (tilegx_putchar(context, port->x_char)) + return; + port->x_char = 0; + port->icount.tx++; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) + return; + + while (!uart_circ_empty(xmit)) { + ch = xmit->buf[xmit->tail]; + if (tilegx_putchar(context, ch)) + break; + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + } + + /* Reset WFIFO_RE interrupt. */ + gxio_uart_write(context, UART_INTERRUPT_STATUS, + UART_INTERRUPT_MASK__WFIFO_RE_MASK); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); +} + + +/* + * UART Interrupt handler. + */ +static irqreturn_t tilegx_interrupt(int irq, void *dev_id) +{ + unsigned long flags; + UART_INTERRUPT_STATUS_t intr_stat; + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + struct uart_port *port = dev_id; + irqreturn_t ret = IRQ_NONE; + + spin_lock_irqsave(&port->lock, flags); + + tile_uart = container_of(port, struct tile_uart_port, uart); + context = &tile_uart->context; + intr_stat.word = gxio_uart_read(context, UART_INTERRUPT_STATUS); + + if (intr_stat.rfifo_we) { + handle_receive(tile_uart); + ret = IRQ_HANDLED; + } + if (intr_stat.wfifo_re) { + handle_transmit(tile_uart); + ret = IRQ_HANDLED; + } + + spin_unlock_irqrestore(&port->lock, flags); + return ret; +} + + +/* + * Return TIOCSER_TEMT when transmitter FIFO is empty. + */ +static u_int tilegx_tx_empty(struct uart_port *port) +{ + int ret; + UART_FLAG_t flag; + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + + tile_uart = container_of(port, struct tile_uart_port, uart); + if (!mutex_trylock(&tile_uart->mutex)) + return 0; + context = &tile_uart->context; + + flag.word = gxio_uart_read(context, UART_FLAG); + ret = (flag.wfifo_empty) ? TIOCSER_TEMT : 0; + mutex_unlock(&tile_uart->mutex); + + return ret; +} + + +/* + * Set state of the modem control output lines. + */ +static void tilegx_set_mctrl(struct uart_port *port, u_int mctrl) +{ + /* N/A */ +} + + +/* + * Get state of the modem control input lines. + */ +static u_int tilegx_get_mctrl(struct uart_port *port) +{ + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; +} + + +/* + * Stop transmitting. + */ +static void tilegx_stop_tx(struct uart_port *port) +{ + /* N/A */ +} + + +/* + * Start transmitting. + */ +static void tilegx_start_tx(struct uart_port *port) +{ + unsigned char ch; + struct circ_buf *xmit; + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + + tile_uart = container_of(port, struct tile_uart_port, uart); + if (!mutex_trylock(&tile_uart->mutex)) + return; + context = &tile_uart->context; + xmit = &port->state->xmit; + if (port->x_char) { + if (tilegx_putchar(context, port->x_char)) + return; + port->x_char = 0; + port->icount.tx++; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + mutex_unlock(&tile_uart->mutex); + return; + } + + while (!uart_circ_empty(xmit)) { + ch = xmit->buf[xmit->tail]; + if (tilegx_putchar(context, ch)) + break; + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + mutex_unlock(&tile_uart->mutex); +} + + +/* + * Stop receiving - port is in process of being closed. + */ +static void tilegx_stop_rx(struct uart_port *port) +{ + int err; + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + int cpu; + + tile_uart = container_of(port, struct tile_uart_port, uart); + if (!mutex_trylock(&tile_uart->mutex)) + return; + + context = &tile_uart->context; + cpu = tile_uart->irq_cpu; + err = gxio_uart_cfg_interrupt(context, cpu_x(cpu), cpu_y(cpu), + KERNEL_PL, -1); + mutex_unlock(&tile_uart->mutex); +} + + +/* + * Enable modem status interrupts. + */ +static void tilegx_enable_ms(struct uart_port *port) +{ + /* N/A */ +} + +/* + * Control the transmission of a break signal. + */ +static void tilegx_break_ctl(struct uart_port *port, int break_state) +{ + /* N/A */ +} + + +/* + * Perform initialization and enable port for reception. + */ +static int tilegx_startup(struct uart_port *port) +{ + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + int ret = 0; + int cpu = raw_smp_processor_id(); /* pick an arbitrary cpu */ + + tile_uart = container_of(port, struct tile_uart_port, uart); + if (mutex_lock_interruptible(&tile_uart->mutex)) + return -EBUSY; + context = &tile_uart->context; + + /* Now open the hypervisor device if we haven't already. */ + if (context->fd < 0) { + UART_INTERRUPT_MASK_t intr_mask; + + /* Initialize UART device. */ + ret = gxio_uart_init(context, port->line); + if (ret) { + ret = -ENXIO; + goto err; + } + + /* Create our IRQs. */ + port->irq = create_irq(); + if (port->irq < 0) + goto err_uart_dest; + tile_irq_activate(port->irq, TILE_IRQ_PERCPU); + + /* Register our IRQs. */ + ret = request_irq(port->irq, tilegx_interrupt, 0, + tilegx_uart_driver.driver_name, port); + if (ret) + goto err_dest_irq; + + /* Request that the hardware start sending us interrupts. */ + tile_uart->irq_cpu = cpu; + ret = gxio_uart_cfg_interrupt(context, cpu_x(cpu), cpu_y(cpu), + KERNEL_PL, port->irq); + if (ret) + goto err_free_irq; + + /* Enable UART Tx/Rx Interrupt. */ + intr_mask.word = gxio_uart_read(context, UART_INTERRUPT_MASK); + intr_mask.wfifo_re = 0; + intr_mask.rfifo_we = 0; + gxio_uart_write(context, UART_INTERRUPT_MASK, intr_mask.word); + + /* Reset the Tx/Rx interrupt in case it's set. */ + gxio_uart_write(context, UART_INTERRUPT_STATUS, + UART_INTERRUPT_MASK__WFIFO_RE_MASK | + UART_INTERRUPT_MASK__RFIFO_WE_MASK); + } + + mutex_unlock(&tile_uart->mutex); + return ret; + +err_free_irq: + free_irq(port->irq, port); +err_dest_irq: + destroy_irq(port->irq); +err_uart_dest: + gxio_uart_destroy(context); + ret = -ENXIO; +err: + mutex_unlock(&tile_uart->mutex); + return ret; +} + + +/* + * Release kernel resources if it is the last close, disable the port, + * free IRQ and close the port. + */ +static void tilegx_shutdown(struct uart_port *port) +{ + int err; + UART_INTERRUPT_MASK_t intr_mask; + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + int cpu; + + tile_uart = container_of(port, struct tile_uart_port, uart); + if (mutex_lock_interruptible(&tile_uart->mutex)) + return; + context = &tile_uart->context; + + /* Disable UART Tx/Rx Interrupt. */ + intr_mask.word = gxio_uart_read(context, UART_INTERRUPT_MASK); + intr_mask.wfifo_re = 1; + intr_mask.rfifo_we = 1; + gxio_uart_write(context, UART_INTERRUPT_MASK, intr_mask.word); + + /* Request that the hardware stop sending us interrupts. */ + cpu = tile_uart->irq_cpu; + err = gxio_uart_cfg_interrupt(context, cpu_x(cpu), cpu_y(cpu), + KERNEL_PL, -1); + + if (port->irq > 0) { + free_irq(port->irq, port); + destroy_irq(port->irq); + port->irq = 0; + } + + gxio_uart_destroy(context); + + mutex_unlock(&tile_uart->mutex); +} + + +/* + * Flush the buffer. + */ +static void tilegx_flush_buffer(struct uart_port *port) +{ + /* N/A */ +} + + +/* + * Change the port parameters. + */ +static void tilegx_set_termios(struct uart_port *port, + struct ktermios *termios, struct ktermios *old) +{ + int err; + UART_DIVISOR_t divisor; + UART_TYPE_t type; + unsigned int baud; + struct tile_uart_port *tile_uart; + gxio_uart_context_t *context; + + tile_uart = container_of(port, struct tile_uart_port, uart); + if (!mutex_trylock(&tile_uart->mutex)) + return; + context = &tile_uart->context; + + /* Open the hypervisor device if we haven't already. */ + if (context->fd < 0) { + err = gxio_uart_init(context, port->line); + if (err) { + mutex_unlock(&tile_uart->mutex); + return; + } + } + + divisor.word = gxio_uart_read(context, UART_DIVISOR); + type.word = gxio_uart_read(context, UART_TYPE); + + /* Divisor. */ + baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); + divisor.divisor = uart_get_divisor(port, baud); + + /* Byte size. */ + if ((termios->c_cflag & CSIZE) == CS7) + type.dbits = UART_TYPE__DBITS_VAL_SEVEN_DBITS; + else + type.dbits = UART_TYPE__DBITS_VAL_EIGHT_DBITS; + + /* Parity. */ + if (termios->c_cflag & PARENB) { + /* Mark or Space parity. */ + if (termios->c_cflag & CMSPAR) + if (termios->c_cflag & PARODD) + type.ptype = UART_TYPE__PTYPE_VAL_MARK; + else + type.ptype = UART_TYPE__PTYPE_VAL_SPACE; + else if (termios->c_cflag & PARODD) + type.ptype = UART_TYPE__PTYPE_VAL_ODD; + else + type.ptype = UART_TYPE__PTYPE_VAL_EVEN; + } else + type.ptype = UART_TYPE__PTYPE_VAL_NONE; + + /* Stop bits. */ + if (termios->c_cflag & CSTOPB) + type.sbits = UART_TYPE__SBITS_VAL_TWO_SBITS; + else + type.sbits = UART_TYPE__SBITS_VAL_ONE_SBITS; + + /* Set the uart paramters. */ + gxio_uart_write(context, UART_DIVISOR, divisor.word); + gxio_uart_write(context, UART_TYPE, type.word); + + mutex_unlock(&tile_uart->mutex); +} + + +/* + * Return string describing the specified port. + */ +static const char *tilegx_type(struct uart_port *port) +{ + return port->type == PORT_TILEGX ? DRIVER_NAME_STRING : NULL; +} + + +/* + * Release the resources being used by 'port'. + */ +static void tilegx_release_port(struct uart_port *port) +{ + /* Nothing to release. */ +} + + +/* + * Request the resources being used by 'port'. + */ +static int tilegx_request_port(struct uart_port *port) +{ + /* Always present. */ + return 0; +} + + +/* + * Configure/autoconfigure the port. + */ +static void tilegx_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE) + port->type = PORT_TILEGX; +} + + +/* + * Verify the new serial_struct (for TIOCSSERIAL). + */ +static int tilegx_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_TILEGX)) + return -EINVAL; + + return 0; +} + +#ifdef CONFIG_CONSOLE_POLL + +/* + * Console polling routines for writing and reading from the uart while + * in an interrupt or debug context. + */ + +static int tilegx_poll_get_char(struct uart_port *port) +{ + UART_FIFO_COUNT_t count; + gxio_uart_context_t *context; + struct tile_uart_port *tile_uart; + + tile_uart = container_of(port, struct tile_uart_port, uart); + context = &tile_uart->context; + count.word = gxio_uart_read(context, UART_FIFO_COUNT); + if (count.rfifo_count == 0) + return NO_POLL_CHAR; + return (char)gxio_uart_read(context, UART_RECEIVE_DATA); +} + +static void tilegx_poll_put_char(struct uart_port *port, unsigned char c) +{ + gxio_uart_context_t *context; + struct tile_uart_port *tile_uart; + + tile_uart = container_of(port, struct tile_uart_port, uart); + context = &tile_uart->context; + gxio_uart_write(context, UART_TRANSMIT_DATA, (unsigned long)c); +} + +#endif /* CONFIG_CONSOLE_POLL */ + + +static const struct uart_ops tilegx_ops = { + .tx_empty = tilegx_tx_empty, + .set_mctrl = tilegx_set_mctrl, + .get_mctrl = tilegx_get_mctrl, + .stop_tx = tilegx_stop_tx, + .start_tx = tilegx_start_tx, + .stop_rx = tilegx_stop_rx, + .enable_ms = tilegx_enable_ms, + .break_ctl = tilegx_break_ctl, + .startup = tilegx_startup, + .shutdown = tilegx_shutdown, + .flush_buffer = tilegx_flush_buffer, + .set_termios = tilegx_set_termios, + .type = tilegx_type, + .release_port = tilegx_release_port, + .request_port = tilegx_request_port, + .config_port = tilegx_config_port, + .verify_port = tilegx_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = tilegx_poll_get_char, + .poll_put_char = tilegx_poll_put_char, +#endif +}; + + +static void tilegx_init_ports(void) +{ + int i; + struct uart_port *port; + + for (i = 0; i < TILEGX_UART_NR; i++) { + port = &tile_uart_ports[i].uart; + port->ops = &tilegx_ops; + port->line = i; + port->type = PORT_TILEGX; + port->uartclk = TILEGX_UART_REF_CLK; + port->flags = UPF_BOOT_AUTOCONF; + + tile_uart_ports[i].context.fd = -1; + mutex_init(&tile_uart_ports[i].mutex); + } +} + + +static struct uart_driver tilegx_uart_driver = { + .owner = THIS_MODULE, + .driver_name = DRIVER_NAME_STRING, + .dev_name = TILEGX_UART_NAME, + .major = TILEGX_UART_MAJOR, + .minor = TILEGX_UART_MINOR, + .nr = TILEGX_UART_NR, +}; + + +static int __init tilegx_init(void) +{ + int i; + int ret; + struct tty_driver *tty_drv; + + ret = uart_register_driver(&tilegx_uart_driver); + if (ret) + return ret; + tty_drv = tilegx_uart_driver.tty_driver; + tty_drv->init_termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL; + tty_drv->init_termios.c_ispeed = 115200; + tty_drv->init_termios.c_ospeed = 115200; + + tilegx_init_ports(); + + for (i = 0; i < TILEGX_UART_NR; i++) { + struct uart_port *port = &tile_uart_ports[i].uart; + ret = uart_add_one_port(&tilegx_uart_driver, port); + } + + return 0; +} + + +static void __exit tilegx_exit(void) +{ + int i; + struct uart_port *port; + + for (i = 0; i < TILEGX_UART_NR; i++) { + port = &tile_uart_ports[i].uart; + uart_remove_one_port(&tilegx_uart_driver, port); + } + + uart_unregister_driver(&tilegx_uart_driver); +} + + +module_init(tilegx_init); +module_exit(tilegx_exit); + +MODULE_AUTHOR("Tilera Corporation"); +MODULE_DESCRIPTION("TILEGx serial port driver"); +MODULE_LICENSE("GPL"); diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h index e40ebe1..b47dba2 100644 --- a/include/uapi/linux/serial_core.h +++ b/include/uapi/linux/serial_core.h @@ -235,4 +235,7 @@ /* ST ASC type numbers */ #define PORT_ASC 105 +/* Tilera TILE-Gx UART */ +#define PORT_TILEGX 106 + #endif /* _UAPILINUX_SERIAL_CORE_H */ diff --git a/samples/kprobes/kprobe_example.c b/samples/kprobes/kprobe_example.c index ebf5e0c..366db1a 100644 --- a/samples/kprobes/kprobe_example.c +++ b/samples/kprobes/kprobe_example.c @@ -37,6 +37,11 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs) " status = 0x%lx\n", p->addr, regs->cp0_epc, regs->cp0_status); #endif +#ifdef CONFIG_TILEGX + printk(KERN_INFO "pre_handler: p->addr = 0x%p, pc = 0x%lx," + " ex1 = 0x%lx\n", + p->addr, regs->pc, regs->ex1); +#endif /* A dump_stack() here will give a stack backtrace */ return 0; @@ -58,6 +63,10 @@ static void handler_post(struct kprobe *p, struct pt_regs *regs, printk(KERN_INFO "post_handler: p->addr = 0x%p, status = 0x%lx\n", p->addr, regs->cp0_status); #endif +#ifdef CONFIG_TILEGX + printk(KERN_INFO "post_handler: p->addr = 0x%p, ex1 = 0x%lx\n", + p->addr, regs->ex1); +#endif } /* diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index 858966a..a674fd5 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -364,6 +364,10 @@ if ($arch eq "x86_64") { } elsif ($arch eq "blackfin") { $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s__mcount\$"; $mcount_adjust = -4; +} elsif ($arch eq "tilegx") { + $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s__mcount\$"; + $type = ".quad"; + $alignment = 8; } else { die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD"; } |
