KVM: emulate access to MSR_IA32_MCG_CTL

Injecting an GP when accessing this MSR lets Windows crash when running some
stress test tools in KVM.  So this patch emulates access to this MSR.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a7069ec..338764f 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -487,6 +487,10 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
                pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
                        __FUNCTION__, data);
                break;
+       case MSR_IA32_MCG_CTL:
+               pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
+                       __FUNCTION__, data);
+               break;
        case MSR_IA32_UCODE_REV:
        case MSR_IA32_UCODE_WRITE:
        case 0x200 ... 0x2ff: /* MTRRs */
@@ -529,6 +533,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
        case MSR_IA32_MC0_CTL:
        case MSR_IA32_MCG_STATUS:
        case MSR_IA32_MCG_CAP:
+       case MSR_IA32_MCG_CTL:
        case MSR_IA32_MC0_MISC:
        case MSR_IA32_MC0_MISC+4:
        case MSR_IA32_MC0_MISC+8: