Since commit 575203 the MCE subsystem in the Linux kernel for AMD sets bit 18 in MSR_K7_HWCR. Running such a kernel as a guest in KVM on an AMD host results in a GPE injected into the guest because kvm_set_msr_common returns 1. This patch fixes this by masking bit 18 from the MSR value desired by the guest.
Signed-off-by: Matthias Lange <[email protected]> --- arch/x86/kvm/x86.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 57eac30..24d70d4 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2029,6 +2029,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) data &= ~(u64)0x40; /* ignore flush filter disable */ data &= ~(u64)0x100; /* ignore ignne emulation enable */ data &= ~(u64)0x8; /* ignore TLB cache disable */ + data &= ~(u64)0x40000; /* ignore Mc status write enable */ if (data != 0) { vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", data); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
