* [PATCH] Enable PAT for more AMD CPUs
@ 2008-01-17 12:36 Andi Kleen
2008-01-17 12:43 ` Ingo Molnar
0 siblings, 1 reply; 2+ messages in thread
From: Andi Kleen @ 2008-01-17 12:36 UTC (permalink / raw)
To: mingo, venkatesh.pallipadi, tglx, linux-kernel
I checked some K7 errata files and couldn't find anything related
to PAT. Also for Fam10h and 11h it should be definitely enabled.
Enable PAT for all AMD CPUs >= 6, which is K7 and newer.
Signed-off-by: Andi Kleen <ak@suse.de>
Index: linux/arch/x86/mm/pat.c
===================================================================
--- linux.orig/arch/x86/mm/pat.c
+++ linux/arch/x86/mm/pat.c
@@ -49,7 +49,7 @@ static int pat_known_cpu(void)
return cpu_has_pat;
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
- (boot_cpu_data.x86 == 0xF))
+ (boot_cpu_data.x86 >= 6))
return cpu_has_pat;
return 0;
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] Enable PAT for more AMD CPUs
2008-01-17 12:36 [PATCH] Enable PAT for more AMD CPUs Andi Kleen
@ 2008-01-17 12:43 ` Ingo Molnar
0 siblings, 0 replies; 2+ messages in thread
From: Ingo Molnar @ 2008-01-17 12:43 UTC (permalink / raw)
To: Andi Kleen; +Cc: venkatesh.pallipadi, tglx, linux-kernel
* Andi Kleen <andi@firstfloor.org> wrote:
> I checked some K7 errata files and couldn't find anything related to
> PAT. Also for Fam10h and 11h it should be definitely enabled.
>
> Enable PAT for all AMD CPUs >= 6, which is K7 and newer.
thanks, applied.
Ingo
^ permalink raw reply [flat|nested] 2+ messages in thread
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