1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 7c7bedb83c5..48eaa1b6fc4 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -594,6 +594,10 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
                 }
         }
 #endif
+
+        /* As a rule processors have APIC timer running in deep C states */
+        if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400))
+                set_cpu_cap(c, X86_FEATURE_ARAT);
 }
 
 #ifdef CONFIG_X86_32