From 22d6a1cba3e9ec9baf8ce4d8dd1d088e112a64f1 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 25 May 2007 00:37:12 -0700 Subject: [SPARC64]: Report proper system soft state to the hypervisor. Signed-off-by: David S. Miller --- arch/sparc64/kernel/Makefile | 2 +- arch/sparc64/kernel/entry.S | 12 +++++ arch/sparc64/kernel/hvapi.c | 3 ++ arch/sparc64/kernel/power.c | 2 + arch/sparc64/kernel/process.c | 4 ++ arch/sparc64/kernel/sstate.c | 104 ++++++++++++++++++++++++++++++++++++++++++ arch/sparc64/mm/init.c | 3 ++ arch/sparc64/prom/misc.c | 19 ++++++++ 8 files changed, 148 insertions(+), 1 deletion(-) create mode 100644 arch/sparc64/kernel/sstate.c (limited to 'arch/sparc64') diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile index c749dcc..18e31a8 100644 --- a/arch/sparc64/kernel/Makefile +++ b/arch/sparc64/kernel/Makefile @@ -12,7 +12,7 @@ obj-y := process.o setup.o cpu.o idprom.o \ irq.o ptrace.o time.o sys_sparc.o signal.o \ unaligned.o central.o pci.o starfire.o semaphore.o \ power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \ - visemul.o prom.o of_device.o hvapi.o + visemul.o prom.o of_device.o hvapi.o sstate.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \ diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S index 732b77c..b5dbd57 100644 --- a/arch/sparc64/kernel/entry.S +++ b/arch/sparc64/kernel/entry.S @@ -1937,3 +1937,15 @@ sun4v_con_write: stx %o1, [%o4] retl nop + + /* %o0: soft state + * %o1: address of description string + * + * returns %o0: status + */ + .globl sun4v_mach_set_soft_state +sun4v_mach_set_soft_state: + mov HV_FAST_MACH_SET_SOFT_STATE, %o5 + ta HV_FAST_TRAP + retl + nop diff --git a/arch/sparc64/kernel/hvapi.c b/arch/sparc64/kernel/hvapi.c index f54b3ed..f34f5d6 100644 --- a/arch/sparc64/kernel/hvapi.c +++ b/arch/sparc64/kernel/hvapi.c @@ -9,6 +9,7 @@ #include #include +#include /* If the hypervisor indicates that the API setting * calls are unsupported, by returning HV_EBADTRAP or @@ -179,6 +180,8 @@ void __init sun4v_hvapi_init(void) if (sun4v_hvapi_register(group, major, &minor)) goto bad; + sun4v_sstate_init(); + return; bad: diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c index 699b24b..5d6adea 100644 --- a/arch/sparc64/kernel/power.c +++ b/arch/sparc64/kernel/power.c @@ -19,6 +19,7 @@ #include #include #include +#include #include @@ -53,6 +54,7 @@ static void (*poweroff_method)(void) = machine_alt_power_off; void machine_power_off(void) { + sstate_poweroff(); if (!serial_console || scons_pwroff) { #ifdef CONFIG_PCI if (power_reg) { diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c index 952762b..f5f97e2 100644 --- a/arch/sparc64/kernel/process.c +++ b/arch/sparc64/kernel/process.c @@ -45,6 +45,7 @@ #include #include #include +#include /* #define VERBOSE_SHOWREGS */ @@ -106,6 +107,7 @@ extern void (*prom_keyboard)(void); void machine_halt(void) { + sstate_halt(); if (!serial_console && prom_palette) prom_palette (1); if (prom_keyboard) @@ -116,6 +118,7 @@ void machine_halt(void) void machine_alt_power_off(void) { + sstate_poweroff(); if (!serial_console && prom_palette) prom_palette(1); if (prom_keyboard) @@ -128,6 +131,7 @@ void machine_restart(char * cmd) { char *p; + sstate_reboot(); p = strchr (reboot_command, '\n'); if (p) *p = 0; if (!serial_console && prom_palette) diff --git a/arch/sparc64/kernel/sstate.c b/arch/sparc64/kernel/sstate.c new file mode 100644 index 0000000..5b6e75b --- /dev/null +++ b/arch/sparc64/kernel/sstate.c @@ -0,0 +1,104 @@ +/* sstate.c: System soft state support. + * + * Copyright (C) 2007 David S. Miller + */ + +#include +#include +#include + +#include +#include +#include +#include +#include + +static int hv_supports_soft_state; + +static unsigned long kimage_addr_to_ra(const char *p) +{ + unsigned long val = (unsigned long) p; + + return kern_base + (val - KERNBASE); +} + +static void do_set_sstate(unsigned long state, const char *msg) +{ + unsigned long err; + + if (!hv_supports_soft_state) + return; + + err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg)); + if (err) { + printk(KERN_WARNING "SSTATE: Failed to set soft-state to " + "state[%lx] msg[%s], err=%lu\n", + state, msg, err); + } +} + +static const char booting_msg[32] __attribute__((aligned(32))) = + "Linux booting"; +static const char running_msg[32] __attribute__((aligned(32))) = + "Linux running"; +static const char halting_msg[32] __attribute__((aligned(32))) = + "Linux halting"; +static const char poweroff_msg[32] __attribute__((aligned(32))) = + "Linux powering off"; +static const char rebooting_msg[32] __attribute__((aligned(32))) = + "Linux rebooting"; +static const char panicing_msg[32] __attribute__((aligned(32))) = + "Linux panicing"; + +void sstate_booting(void) +{ + do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg); +} + +void sstate_running(void) +{ + do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg); +} + +void sstate_halt(void) +{ + do_set_sstate(HV_SOFT_STATE_TRANSITION, halting_msg); +} + +void sstate_poweroff(void) +{ + do_set_sstate(HV_SOFT_STATE_TRANSITION, poweroff_msg); +} + +void sstate_reboot(void) +{ + do_set_sstate(HV_SOFT_STATE_TRANSITION, rebooting_msg); +} + +static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr) +{ + do_set_sstate(HV_SOFT_STATE_TRANSITION, panicing_msg); + + return NOTIFY_DONE; +} + +static struct notifier_block sstate_panic_block = { + .notifier_call = sstate_panic_event, + .priority = INT_MAX, +}; + +void __init sun4v_sstate_init(void) +{ + unsigned long major, minor; + + major = 1; + minor = 0; + if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor)) + return; + + hv_supports_soft_state = 1; + + prom_sun4v_guest_soft_state(); + atomic_notifier_chain_register(&panic_notifier_list, + &sstate_panic_block); +} diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index 6e5b01d..0c9995c 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -43,6 +43,7 @@ #include #include #include +#include extern void device_scan(void); @@ -1348,6 +1349,8 @@ void __init paging_init(void) kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; kern_size = (unsigned long)&_end - (unsigned long)KERNBASE; + sstate_booting(); + /* Invalidate both kernel TSBs. */ memset(swapper_tsb, 0x40, sizeof(swapper_tsb)); #ifndef CONFIG_DEBUG_PAGEALLOC diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c index 0b42137..f3e0c14 100644 --- a/arch/sparc64/prom/misc.c +++ b/arch/sparc64/prom/misc.c @@ -15,6 +15,25 @@ #include #include +int prom_service_exists(const char *service_name) +{ + int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) | + P1275_INOUT(1, 1), service_name); + + if (err) + return 0; + return 1; +} + +void prom_sun4v_guest_soft_state(void) +{ + const char *svc = "SUNW,soft-state-supported"; + + if (!prom_service_exists(svc)) + return; + p1275_cmd(svc, P1275_INOUT(0, 0)); +} + /* Reset and reboot the machine with the command 'bcommand'. */ void prom_reboot(const char *bcommand) { -- cgit v1.1