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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-01 11:13:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-01 11:13:33 -0700 |
| commit | 229993001282e128a49a59ec43d255614775703a (patch) | |
| tree | 0d8b3ab03d5dd8d34cae9bffaedcf835a6055473 /arch/x86/kernel/cpu/intel.c | |
| parent | 7687b80a4f5a178fe292d071c91ebf273ebe12db (diff) | |
| parent | fd0f5869724ff6195c6e7f12f8287c66a132e0ba (diff) | |
| download | olio-linux-3.10-229993001282e128a49a59ec43d255614775703a.tar.xz olio-linux-3.10-229993001282e128a49a59ec43d255614775703a.zip | |
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/mm changes from Ingo Molnar:
"The biggest change is new TLB partial flushing code for AMD CPUs.
(The v3.6 kernel had the Intel CPU side code, see commits
e0ba94f14f74..effee4b9b3b.)
There's also various other refinements around the TLB flush code"
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Distinguish TLB shootdown interrupts from other functions call interrupts
x86/mm: Fix range check in tlbflush debugfs interface
x86, cpu: Preset default tlb_flushall_shift on AMD
x86, cpu: Add AMD TLB size detection
x86, cpu: Push TLB detection CPUID check down
x86, cpu: Fixup tlb_flushall_shift formatting
Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 0a4ce2980a5..198e019a531 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; |