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| author | Andi Kleen <ak@suse.de> | 2007-05-21 14:31:47 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-21 09:56:57 -0700 |
| commit | c12ceb766eb5ac975c1145d51236fcdcf81a6578 (patch) | |
| tree | ecc1e605973e3877b99a45c858f57d5a4ceea1be /arch/i386/kernel/cpu/amd.c | |
| parent | 21124a82bb82e100369846ff2044dd5ea65fc934 (diff) | |
| download | blackbird-op-linux-c12ceb766eb5ac975c1145d51236fcdcf81a6578.tar.gz blackbird-op-linux-c12ceb766eb5ac975c1145d51236fcdcf81a6578.zip | |
i386: Clear MCE flag on AMD K6
It reports machine check capability in CPUID, but doesn't actually
implement all the necessary MSRs of the standard Intel machine
check architecture.
This fixes a boot failure on K6s recently introduced.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386/kernel/cpu/amd.c')
| -rw-r--r-- | arch/i386/kernel/cpu/amd.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c index 4fec702afd7e..6f47eeeb93ea 100644 --- a/arch/i386/kernel/cpu/amd.c +++ b/arch/i386/kernel/cpu/amd.c @@ -280,6 +280,10 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) if (c->x86 == 0x10 && !force_mwait) clear_bit(X86_FEATURE_MWAIT, c->x86_capability); + + /* K6s reports MCEs but don't actually have all the MSRs */ + if (c->x86 < 6) + clear_bit(X86_FEATURE_MCE, c->x86_capability); } static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 * c, unsigned int size) |
