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>

diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 8ce7a83..cd2e1cc 100644 (file)
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -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);