Changeset 101408 in vbox for trunk/src/VBox/VMM

Timestamp:

Oct 11, 2023 4:38:39 AM (18 months ago)

Author:

vboxsync

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

159443

Message:

VMM/HMR0: bugref:9918 Clarifying comment regarding why hmR0InitIntelVerifyVmxUsability isn't called on all CPUs here.

File:

• trunk/src/VBox/VMM/VMMR0/HMR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMR0.cpp

@@ -484 +484 @@
         if (!g_fHmVmxUsingSUPR0EnableVTx)
         {
+            /*
+             * We don't verify VMX root mode on all CPUs here because the verify 
+             * function exits VMX root mode thus potentially allowing other
+             * programs to grab VT-x. Our global init's entering and staying in 
+             * VMX root mode (until our module termination) is done later when 
+             * the first VM powers up (after module initialization) using 
+             * VMMR0_DO_HM_ENABLE which calls HMR0EnableAllCpus(). 
+             *  
+             * This is just a quick sanity check.
+             */
             rc = hmR0InitIntelVerifyVmxUsability(uVmxBasicMsr);
             if (RT_SUCCESS(rc))