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x86, cacheinfo: Make use of CPUID 0x8000001d for cache information on AMD 

Rely on CPUID 0x8000001d for cache information when AMD CPUID topology
extensions are available.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Link: http://lkml.kernel.org/r/20121019090049.GF26718@alberich
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Andreas Herrmann 2012-10-19 11:00:49 +02:00 committed by H. Peter Anvin
parent 04a1541828
commit 2e8458dfe4
1 changed files with 5 additions and 1 deletions
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6
arch/x86/kernel/cpu/intel_cacheinfo.c
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@ -538,7 +538,11 @@ __cpuinit cpuid4_cache_lookup_regs(int index,
unsigned edx;
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
amd_cpuid4(index, &eax, &ebx, &ecx);
if (cpu_has_topoext)
cpuid_count(0x8000001d, index, &eax.full,
&ebx.full, &ecx.full, &edx);
else
amd_cpuid4(index, &eax, &ebx, &ecx);
amd_init_l3_cache(this_leaf, index);
} else {
cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);