2015-04-13 08:58+0200, Jan Kiszka:
> 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: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> ---
>
> RFC because it is only compile-tested.
>
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> @@ -3245,6 +3245,15 @@ 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;
> + svm->vmcb->save.g_pat = data;
> + vcpu->arch.pat = data;
Disregarding my Reviewed-by, the code is missing:
mark_dirty(svm->vmcb, VMCB_NPT);
Also,
Tested-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
