KVM: nVMX: do not leak PML full vmexit to L1

commit ab007cc94ff9d82f5a8db8363b3becbd946e58cf upstream.

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@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 1178f6a05766e60197be21a17db2f94b5846cfa7..cedd6745ccbeb1a125045fae68bfa5a0f09b8a4b 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8283,6 +8283,9 @@ 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;
        }