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| author | Ingo Molnar <mingo@kernel.org> | 2012-07-05 21:10:23 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-07-05 21:10:23 +0200 |
| commit | 90574ebb7e6e0f7f74636ee87315890ba88d6a4a (patch) | |
| tree | 5f60106dacbfe246f52aaaf9bac69dd4749f24a6 /arch/x86/xen/enlighten.c | |
| parent | add79461a2a7d964a00b4a2fdaf313c4cf9cf4ec (diff) | |
| parent | ce5c1fe9a9e059b5c58f0a7e2a3e687d0efac815 (diff) | |
| download | op-kernel-dev-90574ebb7e6e0f7f74636ee87315890ba88d6a4a.zip op-kernel-dev-90574ebb7e6e0f7f74636ee87315890ba88d6a4a.tar.gz | |
Merge branch 'perf/urgent' into perf/core
Merge this branch to pick up a fixlet and to update to a more recent base.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/xen/enlighten.c')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index e74df95..ff962d4 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -209,6 +209,9 @@ static void __init xen_banner(void) xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : ""); } +#define CPUID_THERM_POWER_LEAF 6 +#define APERFMPERF_PRESENT 0 + static __read_mostly unsigned int cpuid_leaf1_edx_mask = ~0; static __read_mostly unsigned int cpuid_leaf1_ecx_mask = ~0; @@ -242,6 +245,11 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx, *dx = cpuid_leaf5_edx_val; return; + case CPUID_THERM_POWER_LEAF: + /* Disabling APERFMPERF for kernel usage */ + maskecx = ~(1 << APERFMPERF_PRESENT); + break; + case 0xb: /* Suppress extended topology stuff */ maskebx = 0; |
