KVM: Implement dummy values for MSR_PERF_STATUS

Darwin relies on this and ceases to work without.

Signed-off-by: Alexander Graf <alex@csgraf.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cf6261e3d92..0dd038e7392 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -426,6 +426,7 @@ static u32 msrs_to_save[] = {
         MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
 #endif
         MSR_IA32_TIME_STAMP_COUNTER, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
+        MSR_IA32_PERF_STATUS,
 };
 
 static unsigned num_msrs_to_save;
@@ -653,7 +654,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
         case MSR_IA32_MC0_MISC+12:
         case MSR_IA32_MC0_MISC+16:
         case MSR_IA32_UCODE_REV:
-        case MSR_IA32_PERF_STATUS:
         case MSR_IA32_EBL_CR_POWERON:
                 /* MTRR registers */
         case 0xfe:
@@ -669,6 +669,12 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
         case MSR_IA32_MISC_ENABLE:
                 data = vcpu->arch.ia32_misc_enable_msr;
                 break;
+        case MSR_IA32_PERF_STATUS:
+                /* TSC increment by tick */
+                data = 1000ULL;
+                /* CPU multiplier */
+                data |= (((uint64_t)4ULL) << 40);
+                break;
         case MSR_EFER:
                 data = vcpu->arch.shadow_efer;
                 break;