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>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cf6261e..0dd038e 100644 (file)
--- 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;