Commit-ID: 057237bb35a605d795fd787868a1088705f26ee5 Gitweb: http://git.kernel.org/tip/057237bb35a605d795fd787868a1088705f26ee5 Author: Borislav Petkov <borislav.pet...@amd.com> AuthorDate: Mon, 6 Aug 2012 19:00:39 +0200 Committer: H. Peter Anvin <h...@zytor.com> CommitDate: Mon, 6 Aug 2012 19:18:39 -0700
x86, cpu: Preset default tlb_flushall_shift on AMD Run the mprotect.c microbenchmark on all our families >= K8 and preset the flushall shift variable accordingly. Signed-off-by: Borislav Petkov <borislav.pet...@amd.com> Link: http://lkml.kernel.org/r/1344272439-29080-5-git-send-email...@amd64.org Signed-off-by: H. Peter Anvin <h...@zytor.com> --- arch/x86/kernel/cpu/amd.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index bcd2008..f7e98a2 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -737,6 +737,17 @@ static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, } #endif +static void __cpuinit cpu_set_tlb_flushall_shift(struct cpuinfo_x86 *c) +{ + if (!cpu_has_invlpg) + return; + + tlb_flushall_shift = 5; + + if (c->x86 <= 0x11) + tlb_flushall_shift = 4; +} + static void __cpuinit cpu_detect_tlb_amd(struct cpuinfo_x86 *c) { u32 ebx, eax, ecx, edx; @@ -788,6 +799,8 @@ static void __cpuinit cpu_detect_tlb_amd(struct cpuinfo_x86 *c) tlb_lli_2m[ENTRIES] = eax & mask; tlb_lli_4m[ENTRIES] = tlb_lli_2m[ENTRIES] >> 1; + + cpu_set_tlb_flushall_shift(c); } static const struct cpu_dev __cpuinitconst amd_cpu_dev = { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
