Changeset 79689 in vbox for trunk/src/VBox/VMM

Timestamp:

Jul 11, 2019 11:31:56 AM (6 years ago)

Author:

vboxsync

Message:

VMM/HMVMXR0: Nested VMX: bugref:9180 Added HMVMX_ALWAYS_CLEAN_TRANSIENT debug option.

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

@@ -50 +50 @@
 # define HMVMX_ALWAYS_SAVE_FULL_GUEST_STATE
 # define HMVMX_ALWAYS_SYNC_FULL_GUEST_STATE
+# define HMVMX_ALWAYS_CLEAN_TRANSIENT
 # define HMVMX_ALWAYS_CHECK_GUEST_STATE
 # define HMVMX_ALWAYS_TRAP_ALL_XCPTS
@@ -11439 +11440 @@
     ASMSetFlags(pVmxTransient->fEFlags);                                /* Enable interrupts. */
     Assert(!VMMRZCallRing3IsEnabled(pVCpu));
+
+#ifdef HMVMX_ALWAYS_CLEAN_TRANSIENT
+    /*
+     * Clean all the VMCS fields in the transient structure before reading
+     * anything from the VMCS.
+     */
+    pVmxTransient->uExitReason            = 0;
+    pVmxTransient->uExitIntErrorCode      = 0;
+    pVmxTransient->uExitQual              = 0;
+    pVmxTransient->uGuestLinearAddr       = 0;
+    pVmxTransient->uExitIntInfo           = 0;
+    pVmxTransient->cbInstr                = 0;
+    pVmxTransient->ExitInstrInfo.u        = 0;
+    pVmxTransient->uEntryIntInfo          = 0;
+    pVmxTransient->uEntryXcptErrorCode    = 0;
+    pVmxTransient->cbEntryInstr           = 0;
+    pVmxTransient->uIdtVectoringInfo      = 0;
+    pVmxTransient->uIdtVectoringErrorCode = 0;
+#endif
 
     /*