diff options
Diffstat (limited to 'OvmfPkg/Library/VmgExitLib/VmgExitLib.c')
| -rw-r--r-- | OvmfPkg/Library/VmgExitLib/VmgExitLib.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/OvmfPkg/Library/VmgExitLib/VmgExitLib.c b/OvmfPkg/Library/VmgExitLib/VmgExitLib.c index 0540df8a04..bc5cd61d75 100644 --- a/OvmfPkg/Library/VmgExitLib/VmgExitLib.c +++ b/OvmfPkg/Library/VmgExitLib/VmgExitLib.c @@ -132,15 +132,27 @@ VmgExit ( Performs the necessary steps in preparation for invoking VMGEXIT. Must be
called before setting any fields within the GHCB.
- @param[in, out] Ghcb A pointer to the GHCB
+ @param[in, out] Ghcb A pointer to the GHCB
+ @param[in, out] InterruptState A pointer to hold the current interrupt
+ state, used for restoring in VmgDone ()
**/
VOID
EFIAPI
VmgInit (
- IN OUT GHCB *Ghcb
+ IN OUT GHCB *Ghcb,
+ IN OUT BOOLEAN *InterruptState
)
{
+ //
+ // Be sure that an interrupt can't cause a #VC while the GHCB is
+ // being used.
+ //
+ *InterruptState = GetInterruptState ();
+ if (*InterruptState) {
+ DisableInterrupts ();
+ }
+
SetMem (&Ghcb->SaveArea, sizeof (Ghcb->SaveArea), 0);
}
@@ -150,15 +162,21 @@ VmgInit ( Performs the necessary steps to cleanup after invoking VMGEXIT. Must be
called after obtaining needed fields within the GHCB.
- @param[in, out] Ghcb A pointer to the GHCB
+ @param[in, out] Ghcb A pointer to the GHCB
+ @param[in] InterruptState An indicator to conditionally (re)enable
+ interrupts
**/
VOID
EFIAPI
VmgDone (
- IN OUT GHCB *Ghcb
+ IN OUT GHCB *Ghcb,
+ IN BOOLEAN InterruptState
)
{
+ if (InterruptState) {
+ EnableInterrupts ();
+ }
}
/**
|