diff --git a/xen/arch/x86/cpu/amd.c b/xen/arch/x86/cpu/amd.c
index d7d3fe7cd7..94f35770e5 100644
--- a/xen/arch/x86/cpu/amd.c
+++ b/xen/arch/x86/cpu/amd.c
@@ -465,6 +465,8 @@ static void __devinit init_amd(struct cpuinfo_x86 *c)
 		if (c->x86_power & (1<<8)) {
 			set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
 			set_bit(X86_FEATURE_NONSTOP_TSC, c->x86_capability);
+			if (c->x86 != 0x11)
+				set_bit(X86_FEATURE_TSC_RELIABLE, c->x86_capability);
 		}
 	}