Changeset 46942 in vbox for trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

Timestamp:

Jul 3, 2013 2:53:47 PM (12 years ago)

Author:

vboxsync

Message:

VMM: Fix LDTR restoration to be done dynamically. This is required for 64-bit Darwin hosts.

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (3 diffs)

trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

@@ -2143 +2143 @@
     RTSEL uSelGS   = 0;
     RTSEL uSelTR   = 0;
-    RTSEL uSelLDTR = 0;
 
     /*
@@ -2154 +2153 @@
     uSelFS   = ASMGetFS();
     uSelGS   = ASMGetGS();
-    uSelLDTR = ASMGetLDTR();
 #endif
 
@@ -2212 +2210 @@
         pVCpu->hm.s.vmx.RestoreHost.uHostSelGS = uSelGS;
         uSelGS = 0;
-    }
-
-    /*
-     * VT-x unconditionally writes LDTR to 0 on all VM-exits. If the host has something different, we shall restore it.
-     * See Intel spec. 27.5.2 "Loading Host Segment and Descriptor-Table Registers".
-     */
-    if (uSelLDTR)
-    {
-        pVCpu->hm.s.vmx.fRestoreHostFlags |= VMX_RESTORE_HOST_SEL_LDTR;
-        pVCpu->hm.s.vmx.RestoreHost.uHostSelLDTR = uSelLDTR;
     }
 #endif