VMMR0

Timestamp:

Nov 16, 2017 12:32:33 PM (7 years ago)

Author:

vboxsync

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

119091

Message:

VMM/HMSVMR0: comment on nCR3 during VMRUN/VMEXIT.

File:

trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp

-              r69707
+              r69713
      * Cache the nested-guest programmed VMCB fields if we have not cached it yet.
      * Otherwise we risk re-caching the values we may have modified, see @bugref{7243#c44}.
+     *
+     * Nested-paging CR3 is not saved back into the VMCB on #VMEXIT, hence no need to
+     * cache and restore it, see AMD spec. 15.25.4 "Nested Paging and VMRUN/#VMEXIT".
      */
     if (!pNstGstVmcbCache->fValid)

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