diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/msr-index.h | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/topology_amd.c | 7 |
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index b65c3ba5fa14..a734b5602149 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -631,6 +631,11 @@ #define MSR_AMD_PPIN 0xc00102f1 #define MSR_AMD64_CPUID_FN_7 0xc0011002 #define MSR_AMD64_CPUID_FN_1 0xc0011004 + +#define MSR_AMD64_CPUID_EXT_FEAT 0xc0011005 +#define MSR_AMD64_CPUID_EXT_FEAT_TOPOEXT_BIT 54 +#define MSR_AMD64_CPUID_EXT_FEAT_TOPOEXT BIT_ULL(MSR_AMD64_CPUID_EXT_FEAT_TOPOEXT_BIT) + #define MSR_AMD64_LS_CFG 0xc0011020 #define MSR_AMD64_DC_CFG 0xc0011022 #define MSR_AMD64_TW_CFG 0xc0011023 diff --git a/arch/x86/kernel/cpu/topology_amd.c b/arch/x86/kernel/cpu/topology_amd.c index 7ebd4a15c561..6ac097e13106 100644 --- a/arch/x86/kernel/cpu/topology_amd.c +++ b/arch/x86/kernel/cpu/topology_amd.c @@ -163,11 +163,12 @@ static void topoext_fixup(struct topo_scan *tscan) c->x86 != 0x15 || c->x86_model < 0x10 || c->x86_model > 0x6f) return; - if (msr_set_bit(0xc0011005, 54) <= 0) + if (msr_set_bit(MSR_AMD64_CPUID_EXT_FEAT, + MSR_AMD64_CPUID_EXT_FEAT_TOPOEXT_BIT) <= 0) return; - rdmsrq(0xc0011005, msrval); - if (msrval & BIT_64(54)) { + rdmsrq(MSR_AMD64_CPUID_EXT_FEAT, msrval); + if (msrval & MSR_AMD64_CPUID_EXT_FEAT_TOPOEXT) { set_cpu_cap(c, X86_FEATURE_TOPOEXT); pr_info_once(FW_INFO "CPU: Re-enabling disabled Topology Extensions Support.\n"); } |