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Commit a223c313 authored by Nicolae Mogoreanu's avatar Nicolae Mogoreanu Committed by Avi Kivity
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KVM: Ignore the writes to MSR_K7_HWCR(3) 



When CPUID Fn8000_0001_EAX reports 0x00100f22 Windows 7 x64 guest
tries to set bit 3 in MSRC001_0015 in nt!KiDisableCacheErrataSource
and fails. This patch will ignore this step and allow things to move
on without having to fake CPUID value.

Signed-off-by: default avatarNicolae Mogoreanu <mogoreanu@gmail.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 4d6931c3

arch/x86/kvm/x86.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -1547,6 +1547,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) 
	case MSR_K7_HWCR:

	case MSR_K7_HWCR:

		data &= ~(u64)0x40;	/* ignore flush filter disable */

		data &= ~(u64)0x40;	/* ignore flush filter disable */

		data &= ~(u64)0x100;	/* ignore ignne emulation enable */

		data &= ~(u64)0x100;	/* ignore ignne emulation enable */

		data &= ~(u64)0x8;	/* ignore TLB cache disable */

		if (data != 0) {

		if (data != 0) {

			pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",

			pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",

				data);

				data);