Changeset 87401 in vbox for trunk/src/VBox/VMM/include

Timestamp:

Jan 23, 2021 2:45:29 AM (4 years ago)

Author:

vboxsync

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

142389

Message:

VMM/HMVMX: Use wrgsbase and wrfsbase instead of wrmsr if we can when restoring the host GS and FS selectors. Align gdtr and idtr in hmR0VmxExportHostSegmentRegs. Don't check SUPKERNELFEATURES_GDT_NEED_WRITABLE or call SUPR0GetCurrentGdtRw just for VMX_RESTORE_HOST_GDTR, we only need that for restoring TR.

Location:

trunk/src/VBox/VMM/include

Files:

• HMInternal.h (modified) (3 diffs)
• HMInternal.mac (modified) (1 diff)

trunk/src/VBox/VMM/include/HMInternal.h

@@ -884 +884 @@
 #define VMX_RESTORE_HOST_GDT_READ_ONLY                          RT_BIT(7)
 #define VMX_RESTORE_HOST_GDT_NEED_WRITABLE                      RT_BIT(8)
+#define VMX_RESTORE_HOST_CAN_USE_WRFSBASE_AND_WRGSBASE          RT_BIT(9)
 /**
  * This _must_ be the top most bit, so that we can easily that that it and
@@ -896 +897 @@
  * @endcode
  */
-#define VMX_RESTORE_HOST_REQUIRED                               RT_BIT(9)
+#define VMX_RESTORE_HOST_REQUIRED                               RT_BIT(10)
 /** @} */
 
@@ -1037 +1038 @@
             /** Alignment. */
             uint8_t                     au8Alignment0[3];
-            /** Which host-state bits to restore before being preempted. */
+            /** Which host-state bits to restore before being preempted, see
+             * VMX_RESTORE_HOST_XXX. */
             uint32_t                    fRestoreHostFlags;
             /** Alignment. */

trunk/src/VBox/VMM/include/HMInternal.mac

@@ -93 +93 @@
 %define VMX_RESTORE_HOST_GDT_READ_ONLY                          0080h   ;RT_BIT(7)
 %define VMX_RESTORE_HOST_GDT_NEED_WRITABLE                      0100h   ;RT_BIT(8)
-%define VMX_RESTORE_HOST_REQUIRED                               0200h   ;RT_BIT(9) - must be the highest bit!
+%define VMX_RESTORE_HOST_CAN_USE_WRFSBASE_AND_WRGSBASE          0200h   ;RT_BIT(9)
+%define VMX_RESTORE_HOST_REQUIRED                               0400h   ;RT_BIT(10) - must be the highest bit!
 struc VMXRESTOREHOST
     .uHostSelDS                     resw    1