2017-03-31 10:19+0200, Ladi Prosek:
> The PML feature is not exposed to guests so we should not be forwarding
> the vmexit either.
>
> This commit fixes BSOD 0x20001 (HYPERVISOR_ERROR) when running Hyper-V
> enabled Windows Server 2016 in L1 on hardware that supports PML.
>
> Fixes: 843e4330573c ("KVM: VMX: Add PML support in VMX")
> Signed-off-by: Ladi Prosek <lprosek@xxxxxxxxxx>
> ---
Good catch,
Reviewed-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
> arch/x86/kvm/vmx.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 2ee00db..6051832 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -8198,6 +8198,9 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu)
> return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
> case EXIT_REASON_PREEMPTION_TIMER:
> return false;
> + case EXIT_REASON_PML_FULL:
> + /* We don't expose PML support to L1. */
> + return false;
> default:
> return true;
> }
> --
> 2.9.3
>
