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* [IA64] Failure to resume after INIT in user spaceKeith Owens2006-04-071-5/+5
| | | | | | | | | The OS INIT handler is loading incorrect values into cr.ifa on exit. This shows up as a hang when resuming after an INIT that is delivered while a cpu is in user space. Correct the value loaded into cr.ifa. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Pass more data to the MCA/INIT notify_die hooksKeith Owens2006-04-071-12/+21
| | | | | | | | | | | The MCA/INIT handlers maintain important state in the SAL to OS (sos) area and in the monarch_cpu flag. Kernel debuggers (such as KDB) need this data, and may need to adjust the monarch_cpu field so make the data available to the notify_die hooks. Define two more events for calling the functions on the notify_die chain. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] for_each_possible_cpu: ia64KAMEZAWA Hiroyuki2006-04-061-1/+1
| | | | | | | | | | | | | | | | | for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu under arch/ia64/kernel/. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fjitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] update HP CSR space discovery via ACPIBjorn Helgaas2006-04-061-72/+71
| | | | | | | | | | | Get rid of the manual search of _CRS, in favor of acpi_get_vendor_resource() which is now provided by the ACPI CA. And fall back to searching for a consumer-only address space descriptor if no vendor-defined resource is found. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Wire up new syscalls {set,get}_robust_listTony Luck2006-04-061-2/+2
| | | | | | Join the dots to enable Ingo's robut futex syscalls. Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Wire up new syscall sync_file_range()Tony Luck2006-04-041-0/+3
| | | | | | Also reserve syscall numbers for {set,get}_robust_list Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Avoid "u64 foo : 32;" for gcc3 vs. gcc4 compatibilityTony Luck2006-03-312-5/+5
| | | | | | | | gcc3 thinks that a 32-bit field of a u64 type is itself a u64, so should be printed with "%ld". gcc4 thinks it needs just "%d". Make both versions happy by avoiding this construct. Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Export cpu cache info by sysfsZhang, Yanmin2006-03-301-0/+367
| | | | | | | | | | | | | | | | The patch exports 8 attributes of cpu cache info under /sys/devices/system/cpu/cpuX/cache/indexX: 1) level 2) type 3) coherency_line_size 4) ways_of_associativity 5) size 6) shared_cpu_map 7) attributes 8) number_of_sets: number_of_sets=size/ways_of_associativity/coherency_line_size. Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2006-03-303-112/+172
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] ioremap() should prefer WB over UC [IA64] Add __mca_table to the DISCARD list in gate.lds [IA64] Move __mca_table out of the __init section [IA64] simplify some condition checks in iosapic_check_gsi_range [IA64] correct some messages and fixes some minor things [IA64-SGI] fix for-loop in sn_hwperf_geoid_to_cnode() [IA64-SGI] sn_hwperf use of num_online_cpus() [IA64] optimize flush_tlb_range on large numa box [IA64] lazy_mmu_prot_update needs to be aware of huge pages
| * [IA64] Add __mca_table to the DISCARD list in gate.ldsJes Sorensen2006-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add __mca_table to the DISCARD list for the gate.lds linker script to avoid broken linker references when linking the final vmlinux file. Also add comment to include/asm-ia64/asmmacros.h to avoid anyone else hitting this problem in the future. Credits to James Bottomley <James.Bottomley@SteelEye.com> for spotting the DISCARD list in gate.lds.S Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Move __mca_table out of the __init sectionRuss Anderson2006-03-291-9/+9
| | | | | | | | | | | | Move __mca_table out of the __init section. Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] simplify some condition checks in iosapic_check_gsi_rangeSatoru Takeuchi2006-03-281-4/+1
| | | | | | | | | | | | | | | | | | Some condition checks on iosapic_check_gsi_range() can be omitted because always `base <= end' is assured. This patch simplifies those checks. Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] correct some messages and fixes some minor thingsSatoru Takeuchi2006-03-281-99/+161
| | | | | | | | | | | | | | | | | | This patch corrects some wrong comments and a printk message. It also fixes some minor things, and makes all lines fit in 80 columns. Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [PATCH] Introduce sys_splice() system callJens Axboe2006-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for the sys_splice system call. Using a pipe as a transport, it can connect to files or sockets (latter as output only). From the splice.c comments: "splice": joining two ropes together by interweaving their strands. This is the "extended pipe" functionality, where a pipe is used as an arbitrary in-memory buffer. Think of a pipe as a small kernel buffer that you can use to transfer data from one end to the other. The traditional unix read/write is extended with a "splice()" operation that transfers data buffers to or from a pipe buffer. Named by Larry McVoy, original implementation from Linus, extended by Jens to support splicing to files and fixing the initial implementation bugs. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] Notifier chain update: API changesAlan Stern2006-03-271-3/+3
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel's implementation of notifier chains is unsafe. There is no protection against entries being added to or removed from a chain while the chain is in use. The issues were discussed in this thread: http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2 We noticed that notifier chains in the kernel fall into two basic usage classes: "Blocking" chains are always called from a process context and the callout routines are allowed to sleep; "Atomic" chains can be called from an atomic context and the callout routines are not allowed to sleep. We decided to codify this distinction and make it part of the API. Therefore this set of patches introduces three new, parallel APIs: one for blocking notifiers, one for atomic notifiers, and one for "raw" notifiers (which is really just the old API under a new name). New kinds of data structures are used for the heads of the chains, and new routines are defined for registration, unregistration, and calling a chain. The three APIs are explained in include/linux/notifier.h and their implementation is in kernel/sys.c. With atomic and blocking chains, the implementation guarantees that the chain links will not be corrupted and that chain callers will not get messed up by entries being added or removed. For raw chains the implementation provides no guarantees at all; users of this API must provide their own protections. (The idea was that situations may come up where the assumptions of the atomic and blocking APIs are not appropriate, so it should be possible for users to handle these things in their own way.) There are some limitations, which should not be too hard to live with. For atomic/blocking chains, registration and unregistration must always be done in a process context since the chain is protected by a mutex/rwsem. Also, a callout routine for a non-raw chain must not try to register or unregister entries on its own chain. (This did happen in a couple of places and the code had to be changed to avoid it.) Since atomic chains may be called from within an NMI handler, they cannot use spinlocks for synchronization. Instead we use RCU. The overhead falls almost entirely in the unregister routine, which is okay since unregistration is much less frequent that calling a chain. Here is the list of chains that we adjusted and their classifications. None of them use the raw API, so for the moment it is only a placeholder. ATOMIC CHAINS ------------- arch/i386/kernel/traps.c: i386die_chain arch/ia64/kernel/traps.c: ia64die_chain arch/powerpc/kernel/traps.c: powerpc_die_chain arch/sparc64/kernel/traps.c: sparc64die_chain arch/x86_64/kernel/traps.c: die_chain drivers/char/ipmi/ipmi_si_intf.c: xaction_notifier_list kernel/panic.c: panic_notifier_list kernel/profile.c: task_free_notifier net/bluetooth/hci_core.c: hci_notifier net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_chain net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_expect_chain net/ipv6/addrconf.c: inet6addr_chain net/netfilter/nf_conntrack_core.c: nf_conntrack_chain net/netfilter/nf_conntrack_core.c: nf_conntrack_expect_chain net/netlink/af_netlink.c: netlink_chain BLOCKING CHAINS --------------- arch/powerpc/platforms/pseries/reconfig.c: pSeries_reconfig_chain arch/s390/kernel/process.c: idle_chain arch/x86_64/kernel/process.c idle_notifier drivers/base/memory.c: memory_chain drivers/cpufreq/cpufreq.c cpufreq_policy_notifier_list drivers/cpufreq/cpufreq.c cpufreq_transition_notifier_list drivers/macintosh/adb.c: adb_client_list drivers/macintosh/via-pmu.c sleep_notifier_list drivers/macintosh/via-pmu68k.c sleep_notifier_list drivers/macintosh/windfarm_core.c wf_client_list drivers/usb/core/notify.c usb_notifier_list drivers/video/fbmem.c fb_notifier_list kernel/cpu.c cpu_chain kernel/module.c module_notify_list kernel/profile.c munmap_notifier kernel/profile.c task_exit_notifier kernel/sys.c reboot_notifier_list net/core/dev.c netdev_chain net/decnet/dn_dev.c: dnaddr_chain net/ipv4/devinet.c: inetaddr_chain It's possible that some of these classifications are wrong. If they are, please let us know or submit a patch to fix them. Note that any chain that gets called very frequently should be atomic, because the rwsem read-locking used for blocking chains is very likely to incur cache misses on SMP systems. (However, if the chain's callout routines may sleep then the chain cannot be atomic.) The patch set was written by Alan Stern and Chandra Seetharaman, incorporating material written by Keith Owens and suggestions from Paul McKenney and Andrew Morton. [jes@sgi.com: restructure the notifier chain initialization macros] Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] bitops: ia64: use cpu_set() instead of __set_bit()Akinobu Mita2006-03-261-1/+2
| | | | | | | | | __set_bit() --> cpu_set() cleanup Signed-off-by: Akinobu Mita <mita@miraclelinux.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kprobes: fix broken fault handling for ia64Prasanna S Panchamukhi2006-03-261-5/+43
| | | | | | | | | | | | | | | | | | | | Provide proper kprobes fault handling, if a user-specified pre/post handlers tries to access user address space, through copy_from_user(), get_user() etc. The user-specified fault handler gets called only if the fault occurs while executing user-specified handlers. In such a case user-specified handler is allowed to fix it first, later if the user-specifed fault handler does not fix it, we try to fix it by calling fix_exception(). The user-specified handler will not be called if the fault happens when single stepping the original instruction, instead we reset the current probe and allow the system page fault handler to fix it up. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Anil S Keshavamurthy<anil.s.keshavamurthy@intel.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kprobe handler: discard user space trapbibo,mao2006-03-261-0/+3
| | | | | | | | | | | | | | Currently kprobe handler traps only happen in kernel space, so function kprobe_exceptions_notify should skip traps which happen in user space. This patch modifies this, and it is based on 2.6.16-rc4. Signed-off-by: bibo mao <bibo.mao@intel.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com> Cc: <hiramatu@sdl.hitachi.co.jp> Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kretprobe instance recycled by parent processbibo mao2006-03-261-8/+0
| | | | | | | | | | | | | | | | | When kretprobe probes the schedule() function, if the probed process exits then schedule() will never return, so some kretprobe instances will never be recycled. In this patch the parent process will recycle retprobe instances of the probed function and there will be no memory leak of kretprobe instances. Signed-off-by: bibo mao <bibo.mao@intel.com> Cc: Masami Hiramatsu <hiramatu@sdl.hitachi.co.jp> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] EFI: keep physical table addresses in efi structureBjorn Helgaas2006-03-263-10/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | Almost all users of the table addresses from the EFI system table want physical addresses. So rather than doing the pa->va->pa conversion, just keep physical addresses in struct efi. This fixes a DMI bug: the efi structure contained the physical SMBIOS address on x86 but the virtual address on ia64, so dmi_scan_machine() used ioremap() on a virtual address on ia64. This is essentially the same as an earlier patch by Matt Tolentino: http://marc.theaimsgroup.com/?l=linux-kernel&m=112130292316281&w=2 except that this changes all table addresses, not just ACPI addresses. Matt's original patch was backed out because it caused MCAs on HP sx1000 systems. That problem is resolved by the ioremap() attribute checking added for ia64. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Matt Domsch <Matt_Domsch@dell.com> Cc: "Tolentino, Matthew E" <matthew.e.tolentino@intel.com> Cc: "Brown, Len" <len.brown@intel.com> Cc: Andi Kleen <ak@muc.de> Acked-by: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] EFI, /dev/mem: simplify efi_mem_attribute_range()Bjorn Helgaas2006-03-261-21/+20
| | | | | | | | | | | | | | | | | | Pass the size, not a pointer to the size, to efi_mem_attribute_range(). This function validates memory regions for the /dev/mem read/write/mmap paths. The pointer allows arches to reduce the size of the range, but I think that's unnecessary complexity. Simplifying it will let me use efi_mem_attribute_range() to improve the ia64 ioremap() implementation. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Matt Domsch <Matt_Domsch@dell.com> Cc: "Tolentino, Matthew E" <matthew.e.tolentino@intel.com> Cc: "Brown, Len" <len.brown@intel.com> Cc: Andi Kleen <ak@muc.de> Acked-by: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ia64: use i386 dmi_scan.cMatt Domsch2006-03-262-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | Enable DMI table parsing on ia64. Andi Kleen has a patch in his x86_64 tree which enables the use of i386 dmi_scan.c on x86_64. dmi_scan.c functions are being used by the drivers/char/ipmi/ipmi_si_intf.c driver for autodetecting the ports or memory spaces where the IPMI controllers may be found. This patch adds equivalent changes for ia64 as to what is in the x86_64 tree. In addition, I reworked the DMI detection, such that on EFI-capable systems, it uses the efi.smbios pointer to find the table, rather than brute-force searching from 0xF0000. On non-EFI systems, it continues the brute-force search. My test system, an Intel S870BN4 'Tiger4', aka Dell PowerEdge 7250, with latest BIOS, does not list the IPMI controller in the ACPI namespace, nor does it have an ACPI SPMI table. Also note, currently shipping Dell x8xx EM64T servers don't have these either, so DMI is the only method for obtaining the address of the IPMI controller. Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Acked-by: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'audit.b3' of ↵Linus Torvalds2006-03-251-2/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current * 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current: (22 commits) [PATCH] fix audit_init failure path [PATCH] EXPORT_SYMBOL patch for audit_log, audit_log_start, audit_log_end and audit_format [PATCH] sem2mutex: audit_netlink_sem [PATCH] simplify audit_free() locking [PATCH] Fix audit operators [PATCH] promiscuous mode [PATCH] Add tty to syscall audit records [PATCH] add/remove rule update [PATCH] audit string fields interface + consumer [PATCH] SE Linux audit events [PATCH] Minor cosmetic cleanups to the code moved into auditfilter.c [PATCH] Fix audit record filtering with !CONFIG_AUDITSYSCALL [PATCH] Fix IA64 success/failure indication in syscall auditing. [PATCH] Miscellaneous bug and warning fixes [PATCH] Capture selinux subject/object context information. [PATCH] Exclude messages by message type [PATCH] Collect more inode information during syscall processing. [PATCH] Pass dentry, not just name, in fsnotify creation hooks. [PATCH] Define new range of userspace messages. [PATCH] Filter rule comparators ... Fixed trivial conflict in security/selinux/hooks.c
| * [PATCH] Fix IA64 success/failure indication in syscall auditing.David Woodhouse2006-03-201-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | Original 2.6.9 patch and explanation from somewhere within HP via bugzilla... ia64 stores a success/failure code in r10, and the return value (normal return, or *positive* errno) in r8. The patch also sets the exit code to negative errno if it's a failure result for consistency with other architectures. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | Merge branch 'release' of ↵Linus Torvalds2006-03-2512-226/+220
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] New IA64 core/thread detection patch [IA64] Increase max node count on SN platforms [IA64] Increase max node count on SN platforms [IA64] Increase max node count on SN platforms [IA64] Increase max node count on SN platforms [IA64] Tollhouse HP: IA64 arch changes [IA64] cleanup dig_irq_init [IA64] MCA recovery: kernel context recovery table IA64: Use early_parm to handle mvec_name and nomca [IA64] move patchlist and machvec into init section [IA64] add init declaration - nolwsys [IA64] add init declaration - gate page functions [IA64] add init declaration to memory initialization functions [IA64] add init declaration to cpu initialization functions [IA64] add __init declaration to mca functions [IA64] Ignore disabled Local SAPIC Affinity Structure in SRAT [IA64] sn_check_intr: use ia64_get_irr() [IA64] fix ia64 is_hugepage_only_range
| * | [IA64] New IA64 core/thread detection patchFenghua Yu2006-03-241-105/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IPF SDM 2.2 changes definition of PAL_LOGICAL_TO_PHYSICAL to add proc_number=-1 to get core/thread mapping info on the running processer. Based on this change, we had better to update existing core/thread detection in IA64 kernel correspondingly. The attached patch implements this change. It simplifies detection code and eliminates potential race condition. It also runs a bit faster and has better scalability especially when cores and threads number grows up in one package. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Increase max node count on SN platformsJack Steiner2006-03-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Node number are kept in the cpu_to_node_map which is currently defined as u8. Change to u16 to accomodate larger node numbers. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Increase max node count on SN platformsJack Steiner2006-03-241-4/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support in IA64 acpi for platforms that support more than 256 nodes. Currently, ACPI is limited to 256 nodes because the proximity domain number is 8-bits. Long term, we expect to use ACPI3.0 to support >256 nodes. This patch is an interim solution that works with platforms that pass the high order bits of the proximity domain in "reserved" fields of the ACPI tables. This code is enabled ONLY on SN platforms. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] MCA recovery: kernel context recovery tableRuss Anderson2006-03-246-41/+109
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Memory errors encountered by user applications may surface when the CPU is running in kernel context. The current code will not attempt recovery if the MCA surfaces in kernel context (privilage mode 0). This patch adds a check for cases where the user initiated the load that surfaces in kernel interrupt code. An example is a user process lauching a load from memory and the data in memory had bad ECC. Before the bad data gets to the CPU register, and interrupt comes in. The code jumps to the IVT interrupt entry point and begins execution in kernel context. The process of saving the user registers (SAVE_REST) causes the bad data to be loaded into a CPU register, triggering the MCA. The MCA surfaces in kernel context, even though the load was initiated from user context. As suggested by David and Tony, this patch uses an exception table like approach, puting the tagged recovery addresses in a searchable table. One difference from the exception table is that MCAs do not surface in precise places (such as with a TLB miss), so instead of tagging specific instructions, address ranges are registers. A single macro is used to do the tagging, with the input parameter being the label of the starting address and the macro being the ending address. This limits clutter in the code. This patch only tags one spot, the interrupt ivt entry. Testing showed that spot to be a "heavy hitter" with MCAs surfacing while saving user registers. Other spots can be added as needed by adding a single macro. Signed-off-by: Russ Anderson (rja@sgi.com) Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | IA64: Use early_parm to handle mvec_name and nomcaHorms2006-03-232-28/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I'm not sure of the worthiness of this idea, so please consider it an RFC. Its key merits are: * Reuse existing infrastructure * Greatly tightens up the parsing of nomca * Greatly simplifies the parsing of machvec Addition cleanup (moving setup_mvec() to machvec.c) by Ken Chen. Signed-Off-By: Horms <horms@verge.net.au> Signed-Off-By: Tony Luck <tony.luck@intel.com>
| * | [IA64] move patchlist and machvec into init sectionChen, Kenneth W2006-03-221-25/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ia64_mv is initialized based on platform detected or specified. However, there is one instantiation of each platform type. We don't expect to switch platform vector during run time. Move those platform specific type into init section since a copy is made into global ia64_mv at initialization. Also move instruction patch list into init section as well. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] add init declaration - gate page functionsChen, Kenneth W2006-03-221-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | Add init declaration to bunch of patch functions and gate page setup function. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] add init declaration to memory initialization functionsChen, Kenneth W2006-03-221-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add init declaration to variables/functions used for memory initialization. I don't think they would clash with memory hotplug. If they do, please yell. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] add init declaration to cpu initialization functionsChen, Kenneth W2006-03-221-6/+6
| | | | | | | | | | | | | | | | | | | | | Add init declaration to cpu initialization functions. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] add __init declaration to mca functionsChen, Kenneth W2006-03-221-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | Mark init related variable and functions with appropriate __init* declaration to mca functions. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Ignore disabled Local SAPIC Affinity Structure in SRATKenji Kaneshige2006-03-221-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to the ACPI spec, the OSPM must ignore the contents of the Processor Local APIC/SAPIC Affinity Structure in System Resource Affinity Table (SRAT), if its enable flag is cleared. However, ia64 linux refers all of the Processor Local APIC/SAPIC Affinity Structures in SRAT regardless of the enable flag. This is obviously against the ACPI spec. This patch fixes this bug. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [PATCH] kill include/linux/platform.h, default_idle() cleanupAdrian Bunk2006-03-241-1/+0
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | include/linux/platform.h contained nothing that was actually used except the default_idle() prototype, and is therefore removed by this patch. This patch does the following with the platform specific default_idle() functions on different architectures: - remove the unused function: - parisc - sparc64 - make the needlessly global function static: - arm - h8300 - m68k - m68knommu - s390 - v850 - x86_64 - add a prototype in asm/system.h: - cris - i386 - ia64 Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Patrick Mochel <mochel@digitalimplant.org> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Pull mca-cleanup into release branchTony Luck2006-03-211-29/+55
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| * | [IA64] MCA: remove obsolete ifdefKeith Owens2006-02-081-7/+0
| | | | | | | | | | | | | | | | | | | | | | | | No platform in the community tree uses PLATFORM_MCA_HANDLERS, remove the references. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] MCA: update MCA comm field for user space tasksKeith Owens2006-02-081-20/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | Update the comm field on the MCA handler for user tasks as well as for verified kernel tasks. This helps to identify the task that was running when the MCA occurred. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] MCA: print messages in MCA handlerKeith Owens2006-02-081-2/+23
| | | | | | | | | | | | | | | | | | | | | | | | Print a message identifying the monarch MCA handler. Print a summary of the status of the slave MCA cpus. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | Pull delete-sigdelayed into release branchTony Luck2006-03-212-115/+0
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| * | | [IA64] Delete MCA/INIT sigdelayed codeKeith Owens2006-01-262-115/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only user of the MCA/INIT sigdelayed code (SGI's I/O probing) has moved from the kernel into SAL. Delete the MCA/INIT sigdelayed code. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | Pull bsp-removal into release branchTony Luck2006-03-218-16/+153
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| * | | [IA64] Fix UP build with BSP removal support.Ashok Raj2006-01-193-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Causes undefined force_cpei_retarget defined in arch/ia64/kernel/smpboot.c Push the unneeded code inside #ifdef CONFIG_HOTPLUG_CPU. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | [IA64] support for cpu0 removalAshok Raj2006-01-057-15/+150
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | here is the BSP removal support for IA64. Its pretty much the same thing that was released a while back, but has your feedback incorporated. - Removed CONFIG_BSP_REMOVE_WORKAROUND and associated cmdline param - Fixed compile issue with sn2/zx1 due to a undefined fix_b0_for_bsp - some formatting nits (whitespace etc) This has been tested on tiger and long back by alex on hp systems as well. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [IA64] Fix race in the accessed/dirty bit handlersChristoph Lameter2006-03-081-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A pte may be zapped by the swapper, exiting process, unmapping or page migration while the accessed or dirty bit handers are about to run. In that case the accessed bit or dirty is set on an zeroed pte which leads the VM to conclude that this is a swap pte. This may lead to - Messages from the vm like swap_free: Bad swap file entry 4000000000000000 - Processes being aborted swap_dup: Bad swap file entry 4000000000000000 VM: killing process .... Page migration is particular suitable for the creation of this race since it needs to remove and restore page table entries. The fix here is to check for the present bit and simply not update the pte if the page is not present anymore. If the page is not present then the fault handler should run next which will take care of the problem by bringing the page back and then mark the page dirty or move it onto the active list. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [IA64] mca recovery return value when no bus checkRuss Anderson2006-03-071-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When there is no bus check, the return code should be failure, not success. Signed-off-by: Russ Anderson (rja@sgi.com) Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [IA64] don't report !sn2 or !summit hardware as an errorBjorn Helgaas2006-03-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This stuff is all in the generic ia64 kernel, and the new initcall error reporting complains about them. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [IA64] Increase severity of MCA recovery messagesRuss Anderson2006-03-071-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The MCA recovery messages are currently KERN_DEBUG, so they don't show up in /var/log/messages (by default). Increase the severity to KERN_ERR, for the initial message (and also add the physical address to this message). Leave the successful isolation message as KERN_DEBUG, but increase the severity when isolation fails to KERN_CRIT. [Russ' patch made these all KERN_CRIT] Signed-off-by: Russ Anderson (rja@sgi.com) Signed-off-by: Tony Luck <tony.luck@intel.com>
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