Changeset 82612 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Dec 18, 2019 10:47:57 AM (5 years ago)

Author:

vboxsync

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

135499

Message:

VMM/HM: Disable LBR virtualization by default. Only enable when set via CFGM for now.

File:

• trunk/src/VBox/VMM/VMMR3/HM.cpp (modified) (1 diff)

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

@@ -356 +356 @@
      * if it's available. */
     rc = CFGMR3QueryBoolDef(pCfgHm, "SvmVGif", &pVM->hm.s.svm.fVGif, true);
+    AssertRCReturn(rc, rc);
+
+    /** @cfgm{/HM/SvmLbrVirt, bool, false}
+     * Whether to make use of the LBR virtualization feature of the CPU if it's
+     * available. This is disabled by default as its only useful while debugging
+     * and enabling it causes a small hit to performance. */
+    rc = CFGMR3QueryBoolDef(pCfgHm, "SvmLbrVirt", &pVM->hm.s.svm.fLbrVirt, false);
     AssertRCReturn(rc, rc);