Messages in this thread Patch in this message | | | From | Borislav Petkov <> | Subject | [PATCH v1 2/4] x86, CPU: Push TLB detection CPUID check down | Date | Mon, 6 Aug 2012 19:00:37 +0200 |
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From: Borislav Petkov <borislav.petkov@amd.com>
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> --- arch/x86/kernel/cpu/common.c | 3 +-- 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; -- 1.7.11.rc1
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