diff options
| author | Borislav Petkov <[email protected]> | 2011-05-17 14:55:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2011-05-17 15:28:34 +0200 |
| commit | 14fb57dccb6e1defe9f89a66f548fcb24c374c1d (patch) | |
| tree | 57126dba7f5ff7b1652c5598f7632986227eab39 | |
| parent | 328935e6348c6a7cb34798a68c326f4b8372e68a (diff) | |
x86, AMD: Fix ARAT feature setting again
Trying to enable the local APIC timer on early K8 revisions
uncovers a number of other issues with it, in conjunction with
the C1E enter path on AMD. Fixing those causes much more churn
and troubles than the benefit of using that timer brings so
don't enable it on K8 at all, falling back to the original
functionality the kernel had wrt to that.
Reported-and-bisected-by: Nick Bowler <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Andreas Herrmann <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Hans Rosenfeld <[email protected]>
Cc: Nick Bowler <[email protected]>
Cc: Joerg-Volker-Peetz <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 3532d3bf8105..6f9d1f6063e9 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -613,7 +613,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) #endif /* As a rule processors have APIC timer running in deep C states */ - if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400)) + if (c->x86 > 0xf && !cpu_has_amd_erratum(amd_erratum_400)) set_cpu_cap(c, X86_FEATURE_ARAT); /* |