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Subjectx86: enable pat on amd athlon mode=6
Date
Hello,

on my AthlonXP 1700 PAT works fine (I tested it several days). Please accept one of the patches below, I don't know which you refer.


Signed-off-by: Bernd Schubert <bernd-schubert@gmx.de>

Patch to enable PAT specifically on model=6

diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index c2e1ce3..61a5aa5 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -57,6 +57,8 @@ void __cpuinit validate_pat_support(struct cpuinfo_x86 *c)
case X86_VENDOR_AMD:
if (c->x86 >= 0xf && c->x86 <= 0x11)
return;
+ if (c->x86 == 0x6)
+ return;
break;
case X86_VENDOR_INTEL:
if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))

Or maybe PAT on all system >=6 is suitable?


diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index c2e1ce3..f12c413 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -55,7 +55,7 @@ void __cpuinit validate_pat_support(struct cpuinfo_x86 *c)
{
switch (c->x86_vendor) {
case X86_VENDOR_AMD:
- if (c->x86 >= 0xf && c->x86 <= 0x11)
+ if (c->x86 >= 0x6 && c->x86 <= 0x11)
return;
break;
case X86_VENDOR_INTEL:

Thanks,
Bernd


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