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authorAnton Arapov <anton@redhat.com>2012-06-25 18:57:38 +0200
committerAnton Arapov <anton@redhat.com>2012-06-25 18:57:38 +0200
commit3d6fafb8cd68b287130dbd5b19fbb5e9bfa32a54 (patch)
tree72cb222e8096ba95c04460df4de752875b062a23 /arch/x86/xen
parent35df99f47c4246df74ed7571c692138b83c3c486 (diff)
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fedora kernel: 6c6f1b8594284404f143c407081ebe65fe068c81v3.4.4-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/enlighten.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 34cc627f18f..97559a67400 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -207,6 +207,9 @@ 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;
@@ -240,6 +243,11 @@ 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;