Changeset 80595 in vbox

Timestamp:

Sep 5, 2019 6:29:24 AM (5 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

133116

Message:

VMM/HMVMXR0: Nested VMX: bugref:9180 Comment.

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (1 diff)

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

@@ -6373 +6373 @@
      * For nested-guests, the guests MSRs from the VM-entry MSR-load area are already
      * loaded (into the guest-CPU context) by the VMLAUNCH/VMRESUME instruction
-     * emulation, nothing to do here.
+     * emulation. The merged MSR permission bitmap will ensure that we get VM-exits
+     * for any MSR that are not part of the lazy MSRs so we do not need to place
+     * those MSRs into the auto-load/store MSR area. Nothing to do here.
      */
     if (ASMAtomicUoReadU64(&pVCpu->hm.s.fCtxChanged) & HM_CHANGED_VMX_GUEST_AUTO_MSRS)