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Commit e098223b authored by Jan Kiszka's avatar Jan Kiszka Committed by Paolo Bonzini
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KVM: SVM: Sync g_pat with guest-written PAT value 



When hardware supports the g_pat VMCB field, we can use it for emulating
the PAT configuration that the guest configures by writing to the
corresponding MSR.

Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Tested-by: default avatarJoerg Roedel <jroedel@suse.de>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3c2e7f7d

arch/x86/kvm/svm.c

+10 −0
Original line number Diff line number Diff line
@@ -3350,6 +3350,16 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) 
	case MSR_VM_IGNNE:

		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);

		break;

	case MSR_IA32_CR_PAT:

		if (npt_enabled) {

			if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data))

				return 1;

			vcpu->arch.pat = data;

			svm_set_guest_pat(svm, &svm->vmcb->save.g_pat);

			mark_dirty(svm->vmcb, VMCB_NPT);

			break;

		}

		/* fall through */

	default:

		return kvm_set_msr_common(vcpu, msr);

	}