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x86, mce: Support specifying context for software mce injection

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The cpu context is specified via the new mce.inject_flags fields.
This allows more realistic machine check testing in different
situations. "RANDOM" context is implemented via NMI broadcasting to
add randomization to testing.

AK: Fix NMI broadcasting check. Fix 32-bit building. Some race
fixes. Move to module. Various changes

ChangeLog:

v3:

- Re-based on latest x86-tip.git/mce4

- Fix 32-bit building

v2:

- Re-base on latest x86-tip.git/mce3

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Huang Ying
2009-07-31 09:41:40 +08:00
committed by H. Peter Anvin
parent f3a0867b12
commit 5b7e88edc6
2 changed files with 140 additions and 37 deletions
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11
arch/x86/include/asm/mce.h
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@ -38,6 +38,13 @@
#define MCM_ADDR_MEM 3 /* memory address */
#define MCM_ADDR_GENERIC 7 /* generic */
#define MCJ_CTX_MASK 3
#define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK)
#define MCJ_CTX_RANDOM 0 /* inject context: random */
#define MCJ_CTX_PROCESS 1 /* inject context: process */
#define MCJ_CTX_IRQ 2 /* inject context: IRQ */
#define MCJ_NMI_BROADCAST 4 /* do NMI broadcasting */
/* Fields are zero when not available */
struct mce {
__u64 status;
@ -48,8 +55,8 @@ struct mce {
__u64 tsc; /* cpu time stamp counter */
__u64 time; /* wall time_t when error was detected */
__u8 cpuvendor; /* cpu vendor as encoded in system.h */
__u8 pad1;
__u16 pad2;
__u8 inject_flags; /* software inject flags */
__u16 pad;
__u32 cpuid; /* CPUID 1 EAX */
__u8 cs; /* code segment */
__u8 bank; /* machine check bank */