Re: [PATCH] [8/45] x86_64: Use string instruction memcpy on AMD Fam11h

Jan Engelhardt
2007-09-22T09:30:07Z

On Sep 21 2007 22:44, Andi Kleen wrote:
>Subject: [PATCH] [8/45] x86_64: Use string instruction memcpy on AMD Fam11h
>
>--- linux.orig/arch/x86_64/kernel/setup.c
>+++ linux/arch/x86_64/kernel/setup.c
>@@ -575,7 +575,7 @@ static void __cpuinit init_amd(struct cp
> level = cpuid_eax(1);
> if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
> set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
>- if (c->x86 == 0x10)
>+ if (c->x86 == 0x10 || c->x86 == 0x11)
> set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);

Perhaps it can be assumed that all future CPU versions have this and
if (c->x86 >= 0x10)
could be used?