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 f55bc40b1ebac2a745078e3074f248b08b61644f..50ca8f409a7ce692e6a09afb09f85f3b774bbe95 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7838,6 +7838,9 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu)
                return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
        case EXIT_REASON_PCOMMIT:
                return nested_cpu_has2(vmcs12, SECONDARY_EXEC_PCOMMIT);
+       case EXIT_REASON_PML_FULL:
+               /* We don't expose PML support to L1. */
+               return false;
        default:
                return true;
        }