diff options
| author | Andi Kleen <ak@suse.de> | 2007-07-22 05:12:32 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-22 14:03:37 -0400 |
| commit | 8f4e956b313dcccbc7be6f10808952345e3b638c (patch) | |
| tree | cc8c93fa1faf5e0b608e3a21330a32bd82fe6f47 /include/asm-i386/mce.h | |
| parent | 19d36ccdc34f5ed444f8a6af0cbfdb6790eb1177 (diff) | |
x86: Stop MCEs and NMIs during code patching
When a machine check or NMI occurs while multiple byte code is patched
the CPU could theoretically see an inconsistent instruction and crash.
Prevent this by temporarily disabling MCEs and returning early in the
NMI handler.
Based on discussion with Mathieu Desnoyers.
Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-i386/mce.h')
| -rw-r--r-- | include/asm-i386/mce.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-i386/mce.h b/include/asm-i386/mce.h index b0a02ee34ffd..d56d89742e8f 100644 --- a/include/asm-i386/mce.h +++ b/include/asm-i386/mce.h | |||
| @@ -5,3 +5,7 @@ extern void mcheck_init(struct cpuinfo_x86 *c); | |||
| 5 | #endif | 5 | #endif |
| 6 | 6 | ||
| 7 | extern int mce_disabled; | 7 | extern int mce_disabled; |
| 8 | |||
| 9 | extern void stop_mce(void); | ||
| 10 | extern void restart_mce(void); | ||
| 11 | |||