kvm: nVMX: Don't set vmcs12 to "launched" when VMLAUNCH fails

The VMCS launch state is not set to "launched" unless the VMLAUNCH
actually succeeds. VMLAUNCH failure includes VM-exits with bit 31 set.

Note that this change does not address the general problem that a
failure to launch/resume vmcs02 (i.e. vmx->fail) is not handled
correctly.

Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7592a18..ef978d5 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -10435,8 +10435,6 @@ static int enter_vmx_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
                return 1;
        }
 
-       vmcs12->launch_state = 1;
-
        /*
         * Note no nested_vmx_succeed or nested_vmx_fail here. At this point
         * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet
@@ -10810,6 +10808,8 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
        vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
 
        if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) {
+               vmcs12->launch_state = 1;
+
                /* vm_entry_intr_info_field is cleared on exit. Emulate this
                 * instead of reading the real value. */
                vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK;