1 files changed, 9 insertions, 6 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 218949cce1a0..992ab7115871 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1312,16 +1312,19 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
         case MSR_K7_EVNTSEL1:
         case MSR_K7_EVNTSEL2:
         case MSR_K7_EVNTSEL3:
+        case MSR_K7_PERFCTR0:
+        case MSR_K7_PERFCTR1:
+        case MSR_K7_PERFCTR2:
+        case MSR_K7_PERFCTR3:
                 /*
-                 * only support writing 0 to the performance counters for now
-                 * to make Windows happy. Should be replaced by a real
-                 * performance counter emulation later.
+                 * Just discard all writes to the performance counters; this
+                 * should keep both older linux and windows 64-bit guests
+                 * happy
                  */
-                if (data != 0)
-                        goto unhandled;
+                pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", ecx, data);
+
                 break;
         default:
-        unhandled:
                 return kvm_set_msr_common(vcpu, ecx, data);
         }
         return 0;