Changeset 97618 in vbox for trunk/src/VBox

Timestamp:

Nov 20, 2022 2:09:44 AM (2 years ago)

Author:

vboxsync

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

154662

Message:

VMM/HMVMX: Changed the default of HM/AlwaysInterceptVmxMovDRx to the more cautious approach of intercepting DRx access to hide new bits that might be modified on recent Intel CPUs.

File:

• trunk/src/VBox/VMM/VMMR3/HM.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR3/HM.cpp

@@ -529 +529 @@
     AssertLogRelRCReturn(rc, rc);
 
-    /** @cfgm{/HM/AlwaysInterceptVmxMovDRx,int8_t,-1}
+    /** @cfgm{/HM/AlwaysInterceptVmxMovDRx,int8_t,0}
      * Whether to always intercept MOV DRx when using VMX.
      * The value is a tristate: 1 for always intercepting, -1 for lazy intercept,
@@ -546 +546 @@
      * Note that it seems DR6.RTM remains writable even after the microcode updates
      * disabling TSX. */
-    rc = CFGMR3QueryS8Def(pCfgHm, "AlwaysInterceptVmxMovDRx", &pVM->hm.s.vmx.fAlwaysInterceptMovDRxCfg, -1);
+    rc = CFGMR3QueryS8Def(pCfgHm, "AlwaysInterceptVmxMovDRx", &pVM->hm.s.vmx.fAlwaysInterceptMovDRxCfg, 0);
     AssertLogRelRCReturn(rc, rc);