x86: fix bootup crash in native_read_tsc()
fix bootup crash in native_read_tsc() that was reported on an Athlon-XP
and bisected. The correct feature boundary for X86_FEATURE_MFENCE_RDTSC
is not XMM but XMM2.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 06fa159..693e353 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -304,7 +304,7 @@
if (c->x86 < 6)
clear_bit(X86_FEATURE_MCE, c->x86_capability);
- if (cpu_has_xmm)
+ if (cpu_has_xmm2)
set_bit(X86_FEATURE_MFENCE_RDTSC, c->x86_capability);
}