KVM: nSVM: correctly restore nested_run_pending on migration

The code to store it on the migration exists, but no code was restoring it.

One of the side effects of fixing this is that L1->L2 injected events
are no longer lost when migration happens with nested run pending.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210107093854.882483-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index b0b6674..a466336 100644 (file)
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -1194,6 +1194,10 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
         * in the registers, the save area of the nested state instead
         * contains saved L1 state.
         */
+
+       svm->nested.nested_run_pending =
+               !!(kvm_state->flags & KVM_STATE_NESTED_RUN_PENDING);
+
        copy_vmcb_control_area(&hsave->control, &svm->vmcb->control);
        hsave->save = *save;