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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-06 14:42:54 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-06 14:42:54 +0100 |
| commit | 0464ac9ebd90cfd5792d3c1158af848281b7eb09 (patch) | |
| tree | ab4419845b9e7ae3417741f34cfab6acd00754aa /arch/x86/kernel/cpu/intel.c | |
| parent | 0973a06cde8cc1522fbcf2baacb926f1ee3f4c79 (diff) | |
| parent | 9be260a646bf76fa418ee519afa10196b3164681 (diff) | |
| download | blackbird-op-linux-0464ac9ebd90cfd5792d3c1158af848281b7eb09.tar.gz blackbird-op-linux-0464ac9ebd90cfd5792d3c1158af848281b7eb09.zip | |
Merge branch 'linus' into x86/mm
Conflicts:
arch/x86/mm/fault.c
Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 8ea6929e974c..430e5c38a544 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -29,6 +29,19 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c) { + /* Unmask CPUID levels if masked: */ + if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) { + u64 misc_enable; + + rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable); + + if (misc_enable & MSR_IA32_MISC_ENABLE_LIMIT_CPUID) { + misc_enable &= ~MSR_IA32_MISC_ENABLE_LIMIT_CPUID; + wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable); + c->cpuid_level = cpuid_eax(0); + } + } + if ((c->x86 == 0xf && c->x86_model >= 0x03) || (c->x86 == 0x6 && c->x86_model >= 0x0e)) set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |
