Changeset 95495 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

Jul 4, 2022 8:18:19 AM (3 years ago)

Author:

vboxsync

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

152109

Message:

VMM/HMSVMR0: updated CR4 write intercept comments with AVX/xcr0.

File:

• trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp (modified) (3 diffs)

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

@@ -1055 +1055 @@
     }
 
-    /* CR4 writes must always be intercepted for tracking PGM mode changes. */
+    /* CR4 writes must always be intercepted for tracking PGM mode changes and
+       AVX (for XCR0 syncing during worlds switching). */
     pVmcbCtrl0->u16InterceptWrCRx = RT_BIT(4);
 
@@ -1666 +1667 @@
         pVmcb->ctrl.u16InterceptRdCRx |= RT_BIT(4);
 
-    /* CR4 writes are always intercepted (both guest, nested-guest) for tracking PGM mode changes. */
+    /* CR4 writes are always intercepted (both guest, nested-guest) for tracking
+       PGM mode changes and AVX (for XCR0 syncing during worlds switching). */
     Assert(pVmcb->ctrl.u16InterceptWrCRx & RT_BIT(4));
 
@@ -2205 +2207 @@
     pVmcbNstGstCtrl->u16InterceptWrCRx |= pVmcb->ctrl.u16InterceptWrCRx;
 
-    /* Always intercept CR4 writes for tracking PGM mode changes. */
+    /* Always intercept CR4 writes for tracking PGM mode changes and AVX (for
+       XCR0 syncing during worlds switching). */
     pVmcbNstGstCtrl->u16InterceptWrCRx |= RT_BIT(4);