* [PATCH] x86/AMD: don't set ARAT feature flag on family F CPUs
@ 2011-05-19 12:09 Jan Beulich
0 siblings, 0 replies; only message in thread
From: Jan Beulich @ 2011-05-19 12:09 UTC (permalink / raw)
To: xen-devel@lists.xensource.com; +Cc: Borislav Petkov
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Following Linux commit 14fb57dccb6e1defe9f89a66f548fcb24c374c1d from
Borislav Petkov.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- a/xen/arch/x86/cpu/amd.c
+++ b/xen/arch/x86/cpu/amd.c
@@ -475,7 +475,7 @@ static void __devinit init_amd(struct cp
#endif
/* As a rule processors have APIC timer running in deep C states */
- if (c->x86 >= 0xf && !cpu_has_amd_erratum(c, AMD_ERRATUM_400))
+ if (c->x86 > 0xf && !cpu_has_amd_erratum(c, AMD_ERRATUM_400))
set_bit(X86_FEATURE_ARAT, c->x86_capability);
/* Prevent TSC drift in non single-processor, single-core platforms. */
[-- Attachment #2: x86-AMD-ARAT-adjust.patch --]
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Following Linux commit 14fb57dccb6e1defe9f89a66f548fcb24c374c1d from
Borislav Petkov.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- a/xen/arch/x86/cpu/amd.c
+++ b/xen/arch/x86/cpu/amd.c
@@ -475,7 +475,7 @@ static void __devinit init_amd(struct cp
#endif
/* As a rule processors have APIC timer running in deep C states */
- if (c->x86 >= 0xf && !cpu_has_amd_erratum(c, AMD_ERRATUM_400))
+ if (c->x86 > 0xf && !cpu_has_amd_erratum(c, AMD_ERRATUM_400))
set_bit(X86_FEATURE_ARAT, c->x86_capability);
/* Prevent TSC drift in non single-processor, single-core platforms. */
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