Changeset 67136 in vbox for trunk/include/VBox/vmm/hm_vmx.mac

Timestamp:

May 30, 2017 7:58:21 AM (8 years ago)

Author:

vboxsync

Message:

HostDrivers/Support, VMM: bugref:8864: On Linux 4.12 the GDT is mapped read-only. The writable-mapped GDT is available and is used for clearing the TSS BUSY descriptor bit and for LTR.

File:

• trunk/include/VBox/vmm/hm_vmx.mac (modified) (3 diffs)

trunk/include/VBox/vmm/hm_vmx.mac

@@ -161 +161 @@
 %define VMX_RESTORE_HOST_GDT_READ_ONLY                          80h   ;RT_BIT(7)
 %define VMX_RESTORE_HOST_REQUIRED                              100h   ;RT_BIT(8)
+%define VMX_RESTORE_HOST_GDT_NEED_WRITABLE                     200h   ;RT_BIT(9)
 
 ;; C version hm_vmx.h.
@@ -172 +173 @@
     .HostGdtr           resb    10
     .abPadding1         resb    6
+    .HostGdtrRw         resb    10
+    .abPadding2         resb    6
     .HostIdtr           resb    10
     .uHostFSBase        resq    1
@@ -177 +180 @@
 endstruc
 AssertCompileMemberOffset(VMXRESTOREHOST, HostGdtr,     16-2)
-AssertCompileMemberOffset(VMXRESTOREHOST, HostIdtr,     32-2)
-AssertCompileMemberOffset(VMXRESTOREHOST, uHostFSBase,    40)
-AssertCompileSize(VMXRESTOREHOST, 56)
+AssertCompileMemberOffset(VMXRESTOREHOST, HostGdtrRw,   32-2)
+AssertCompileMemberOffset(VMXRESTOREHOST, HostIdtr,     48-2)
+AssertCompileMemberOffset(VMXRESTOREHOST, uHostFSBase,    56)
+AssertCompileSize(VMXRESTOREHOST, 72)