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alistair23-linux/arch/x86/kernel
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Andi Kleen 4efc0670ba x86, mce: use 64bit machine check code on 32bit 
The 64bit machine check code is in many ways much better than
the 32bit machine check code: it is more specification compliant,
is cleaner, only has a single code base versus one per CPU,
has better infrastructure for recovery, has a cleaner way to communicate
with user space etc. etc.

Use the 64bit code for 32bit too.

This is the second attempt to do this. There was one a couple of years
ago to unify this code for 32bit and 64bit.  Back then this ran into some
trouble with K7s and was reverted.

I believe this time the K7 problems (and some others) are addressed.
I went over the old handlers and was very careful to retain
all quirks.

But of course this needs a lot of testing on old systems. On newer
64bit capable systems I don't expect much problems because they have been
already tested with the 64bit kernel.

I made this a CONFIG for now that still allows to select the old
machine check code. This is mostly to make testing easier,
if someone runs into a problem we can ask them to try
with the CONFIG switched.

The new code is default y for more coverage.

Once there is confidence the 64bit code works well on older hardware
too the CONFIG_X86_OLD_MCE and the associated code can be easily
removed.

This causes a behaviour change for 32bit installations. They now
have to install the mcelog package to be able to log
corrected machine checks.

The 64bit machine check code only handles CPUs which support the
standard Intel machine check architecture described in the IA32 SDM.
The 32bit code has special support for some older CPUs which
have non standard machine check architectures, in particular
WinChip C3 and Intel P5.  I made those a separate CONFIG option
and kept them for now. The WinChip variant could be probably
removed without too much pain, it doesn't really do anything
interesting. P5 is also disabled by default (like it
was before) because many motherboards have it miswired, but
according to Alan Cox a few embedded setups use that one.

Forward ported/heavily changed version of old patch, original patch
included review/fixes from Thomas Gleixner, Bert Wesarg.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-28 09:24:13 -07:00
..
acpi Merge branch 'linus' into release 2009-04-05 02:14:15 -04:00
apic x86, mce: use 64bit machine check code on 32bit 2009-05-28 09:24:13 -07:00
cpu x86, mce: use 64bit machine check code on 32bit 2009-05-28 09:24:13 -07:00
.gitignore
alternative.c x86: expand irq-off region in text_poke() 2009-03-10 16:24:23 +01:00
amd_iommu.c Merge git://git.infradead.org/iommu-2.6 2009-04-03 10:36:57 -07:00
amd_iommu_init.c amd-iommu: fix iommu flag masks 2009-05-04 15:05:24 +02:00
aperture_64.c
apm_32.c Merge branch 'cpumask-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-03-31 13:33:50 +10:30
asm-offsets.c
asm-offsets_32.c pm: rework includes, remove arch ifdefs 2009-04-01 08:59:16 -07:00
asm-offsets_64.c pm: rework includes, remove arch ifdefs 2009-04-01 08:59:16 -07:00
audit_64.c
bios_uv.c x86, UV: system table in bios accessed after unmap 2009-04-03 19:25:57 +02:00
bootflag.c
check.c x86: fix 64k corruption-check 2009-03-15 07:03:15 +01:00
cpuid.c Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-03 12:04:39 -08:00
crash.c x86, apic: remove duplicate asm/apic.h inclusions 2009-02-17 17:52:44 +01:00
crash_dump_32.c
crash_dump_64.c
doublefault_32.c
ds.c x86, pebs: correct qualifier passed to ds_write_config() from ds_request_pebs() 2009-03-06 16:13:15 +01:00
dumpstack.c Merge commit 'origin/master' into next 2009-03-30 14:04:53 +11:00
dumpstack.h
dumpstack_32.c
dumpstack_64.c x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit. 2009-01-19 00:38:58 +09:00
e820.c x86: fix boot hang in early_reserve_e820() 2009-05-07 21:42:39 -07:00
early-quirks.c x86: only scan the root bus in early PCI quirks 2009-01-09 12:46:22 -08:00
early_printk.c x86: properly __init-annotate recent early_printk additions 2009-03-13 02:37:18 +01:00
efi.c Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
efi_32.c
efi_64.c Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
efi_stub_32.S Merge branch 'x86/asm' into x86/mm 2009-02-25 08:27:46 +01:00
efi_stub_64.S x86: efi_stub_32,64 - add missing ENDPROCs 2009-02-24 18:08:40 +01:00
entry_32.S x86: entry_32.S fix compile warnings - fix work mask bit width 2009-03-14 09:42:51 +01:00
entry_64.S x86, mce: use a call vector to call the 64bit mce handler 2009-05-28 09:24:12 -07:00
ftrace.c x86/function-graph: fix constraint for recording old return value 2009-05-13 13:52:19 -04:00
geode_32.c
head.c
head32.c x86-32: use brk segment for allocating initial kernel pagetable 2009-03-14 17:23:47 -07:00
head64.c x86: add brk allocation for very, very early allocations 2009-03-14 15:37:14 -07:00
head_32.S x86-32: tighten the bound on additional memory to map 2009-03-17 11:52:10 -07:00
head_64.S x86: head_64.S - use IDT_ENTRIES instead of hardcoded number 2009-02-24 18:08:38 +01:00
hpet.c x86: hpet: fix periodic mode programming on AMD 81xx 2009-04-22 15:53:40 +02:00
i386_ksyms_32.c
i387.c x86, math-emu: fix init_fpu for task != current 2009-03-04 20:33:16 +01:00
i8237.c i8327: fix outb() parameter order 2009-02-10 13:13:23 +01:00
i8253.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
i8259.c x86: refactor x86_quirks support 2009-02-23 00:08:11 +01:00
init_task.c take init_fs to saner place 2008-12-31 18:07:42 -05:00
io_delay.c x86: io_delay.c cleanup 2009-03-21 16:57:04 +05:30
ioport.c x86-32: use non-lazy io bitmap context switching 2009-03-02 12:07:48 +01:00
irq.c x86, mce: use 64bit machine check code on 32bit 2009-05-28 09:24:13 -07:00
irq_32.c Merge branch 'tj-percpu' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into core/percpu 2009-02-24 21:52:45 +01:00
irq_64.c x86: unify do_IRQ() 2009-02-09 12:16:05 +01:00
irqinit_32.c x86, mce: use 64bit machine check code on 32bit 2009-05-28 09:24:13 -07:00
irqinit_64.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask 2009-03-30 18:00:26 -07:00
k8.c
kdebugfs.c x86: kdebugfs.c cleanup 2009-03-21 16:55:45 +05:30
kgdb.c kgdb,i386: use address that SP register points to in the exception frame 2009-05-15 07:56:25 -05:00
kprobes.c Merge branch 'tracing/core-v2' into tracing-for-linus 2009-04-02 00:49:02 +02:00
kvm.c x86: with the last user gone, remove set_pte_present 2009-03-19 14:04:19 +01:00
kvmclock.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
ldt.c x86: ldt.c fix style problems 2009-01-02 17:46:24 +01:00
machine_kexec_32.c x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP 2009-05-07 22:01:05 -07:00
machine_kexec_64.c x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP 2009-05-07 22:01:05 -07:00
Makefile x86: Fix performance regression caused by paravirt_ops on native kernels 2009-05-15 20:07:42 +02:00
mca_32.c x86: refactor x86_quirks support 2009-02-23 00:08:11 +01:00
mfgpt_32.c cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
microcode_amd.c x86: microcode: cleanup 2009-03-18 13:51:17 +01:00
microcode_core.c Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-17 09:56:11 -07:00
microcode_intel.c x86: microcode: cleanup 2009-03-18 13:51:17 +01:00
mmconf-fam10h_64.c x86: move various CPU initialization objects into .cpuinit.rodata 2009-03-12 13:13:07 +01:00
module_32.c x86: module_32.c fix style problems 2009-01-12 11:22:55 +01:00
module_64.c x86: module_64.c fix style problems 2009-01-12 11:23:01 +01:00
mpparse.c x86: Fix section mismatches in mpparse 2009-04-12 12:32:18 +02:00
msr.c x86: msr.c fix style problems 2009-01-12 11:22:50 +01:00
olpc.c x86, olpc: fix model detection without OFW 2009-02-14 23:05:25 +01:00
paravirt-spinlocks.c x86: remove byte locks 2009-01-20 17:14:28 +01:00
paravirt.c x86: Fix performance regression caused by paravirt_ops on native kernels 2009-05-15 20:07:42 +02:00
paravirt_patch_32.c x86/pvops: add a paravirt_ident functions to allow special patching 2009-01-30 14:51:44 -08:00
paravirt_patch_64.c x86/pvops: add a paravirt_ident functions to allow special patching 2009-01-30 14:51:44 -08:00
pci-calgary_64.c x86, ia64: convert to use generic dma_map_ops struct 2009-01-06 14:06:57 +01:00
pci-dma.c dma-mapping: replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24) 2009-04-07 08:31:12 -07:00
pci-gart_64.c Merge branch 'linus' into core/iommu 2009-03-05 12:47:28 +01:00
pci-nommu.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
pci-swiotlb.c x86: pci-swiotlb.c swiotlb_dma_ops should be static 2009-04-14 02:51:04 +02:00
pcspeaker.c
pmtimer_64.c
probe_roms_32.c x86: move mach-default/*.h files to asm/ 2009-01-29 14:16:51 +01:00
process.c Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-05 11:04:19 -07:00
process_32.c Simplify copy_thread() 2009-04-02 19:04:51 -07:00
process_64.c Simplify copy_thread() 2009-04-02 19:04:51 -07:00
ptrace.c tracing/syscalls: use a dedicated file header 2009-04-09 05:43:32 +02:00
pvclock.c
quirks.c x86, hpet: Stop soliciting hpet=force users on ICH4M 2009-04-24 08:41:39 +02:00
reboot.c x86: DMI match for the Sony VGN-Z540N as it needs BIOS reboot 2009-05-22 09:11:30 +02:00
reboot_fixups_32.c
relocate_kernel_32.S x86, kexec: fix kexec x86 coding style 2009-03-10 18:13:25 -07:00
relocate_kernel_64.S x86, kexec: x86_64: add kexec jump support for x86_64 2009-03-10 18:13:25 -07:00
rtc.c x86: rtc.c cleanup 2009-03-21 16:56:37 +05:30
scx200_32.c
setup.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask 2009-03-30 18:00:26 -07:00
setup_percpu.c x86: Remove remap percpu allocator for the time being 2009-05-25 05:37:55 +02:00
signal.c x86, mce: use 64bit machine check code on 32bit 2009-05-28 09:24:13 -07:00
smp.c x86, apic: remove genapic.h 2009-02-17 17:52:44 +01:00
smpboot.c cpumask: use new cpumask functions throughout x86 2009-03-13 14:49:54 +10:30
stacktrace.c x86: update copyrights 2009-01-31 04:21:18 +01:00
step.c
sys_i386_32.c
sys_x86_64.c
syscall_64.c
syscall_table_32.S preadv/pwritev: Add preadv and pwritev system calls. 2009-04-02 19:05:08 -07:00
tce_64.c
test_nx.c
test_rodata.c
time_32.c x86: refactor x86_quirks support 2009-02-23 00:08:11 +01:00
time_64.c cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
tlb_uv.c Merge branch 'x86/uv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-16 16:43:20 -07:00
tls.c
tls.h
topology.c x86: topology.c cleanup 2009-03-21 16:55:24 +05:30
trampoline.c
trampoline_32.S x86: use _types.h headers in asm where available 2009-02-13 11:35:01 -08:00
trampoline_64.S x86: use _types.h headers in asm where available 2009-02-13 11:35:01 -08:00
traps.c x86, mce: use 64bit machine check code on 32bit 2009-05-28 09:24:13 -07:00
tsc.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
tsc_sync.c Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core 2008-12-23 16:27:23 +01:00
uv_irq.c x86, apic: remove genapic.h 2009-02-17 17:52:44 +01:00
uv_sysfs.c x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems 2009-04-08 14:58:10 +02:00
uv_time.c uv_time: add parameter to uv_read_rtc() 2009-04-22 17:41:25 +02:00
verify_cpu_64.S
visws_quirks.c x86: convert obsolete irq_desc_t typedef to struct irq_desc 2009-03-11 09:49:01 +01:00
vm86_32.c x86: use regparm(3) for passed-in pt_regs pointer 2009-02-11 14:00:56 -08:00
vmi_32.c x86: with the last user gone, remove set_pte_present 2009-03-19 14:04:19 +01:00
vmiclock_32.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
vmlinux.lds.S
vmlinux_32.lds.S x86-32: move _end to a dummy section 2009-03-17 14:16:02 -07:00
vmlinux_64.lds.S x86/brk: put the brk reservations in their own section 2009-03-17 12:58:15 -07:00
vsmp_64.c Revert "x86: don't compile vsmp_64 for 32bit" 2009-03-25 21:34:28 +01:00
vsyscall_64.c Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-12-28 12:21:10 -08:00
x8664_ksyms_64.c x86: convert pda ops to wrappers around x86 percpu accessors 2009-01-16 14:20:22 +01:00
xsave.c x86-64: fix FPU corruption with signals and preemption 2009-04-20 14:33:00 -07:00