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| author | Borislav Petkov <borislav.petkov@amd.com> | 2012-08-06 19:00:37 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-08-06 19:18:29 -0700 |
| commit | 5b556332c3ab19e6375836d35ca658776e9ba0f6 (patch) | |
| tree | bebac54a1b4fcef1288a5839042c5f6755f4a1ba /arch/x86/kernel | |
| parent | a9ad773e0dd833651f0831020a0ea0265c29f2ea (diff) | |
| download | blackbird-op-linux-5b556332c3ab19e6375836d35ca658776e9ba0f6.tar.gz blackbird-op-linux-5b556332c3ab19e6375836d35ca658776e9ba0f6.zip | |
x86, cpu: Push TLB detection CPUID check down
Push the max CPUID leaf check into the ->detect_tlb function and remove
general test case from the generic path.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/1344272439-29080-3-git-send-email-bp@amd64.org
Acked-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index d239977f361f..080f4a737e3e 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -940,8 +940,7 @@ void __init identify_boot_cpu(void) #else vgetcpu_set_mode(); #endif - if (boot_cpu_data.cpuid_level >= 2) - cpu_detect_tlb(&boot_cpu_data); + cpu_detect_tlb(&boot_cpu_data); } void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c) diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 0a4ce2980a5a..198e019a531a 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -648,6 +648,10 @@ static void __cpuinit intel_detect_tlb(struct cpuinfo_x86 *c) int i, j, n; unsigned int regs[4]; unsigned char *desc = (unsigned char *)regs; + + if (c->cpuid_level < 2) + return; + /* Number of times to iterate */ n = cpuid_eax(2) & 0xFF; |
