Changeset 92752 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Dec 6, 2021 5:36:12 AM (3 years ago)

Author:

vboxsync

Message:

VMM: Nested VMX: bugref:10092 Disallow accessed/dirty bit support for EPT paging.

File:

• trunk/src/VBox/VMM/VMMR3/CPUM.cpp (modified) (2 diffs)

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

@@ -1490 +1490 @@
         uint8_t const  f1GPage           = RT_BF_GET(uHostMsr, VMX_BF_EPT_VPID_CAP_PDPTE_1G);
         uint8_t const  fInvept           = RT_BF_GET(uHostMsr, VMX_BF_EPT_VPID_CAP_INVEPT);
-        uint8_t const  fAccessDirty      = RT_BF_GET(uHostMsr, VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY);
+        /** @todo Nested VMX: Support accessed/dirty bits, see @bugref{10092#c25}. */
+        /* uint8_t const  fAccessDirty      = RT_BF_GET(uHostMsr, VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY); */
         uint8_t const  fEptSingle        = RT_BF_GET(uHostMsr, VMX_BF_EPT_VPID_CAP_INVEPT_SINGLE_CTX);
         uint8_t const  fEptAll           = RT_BF_GET(uHostMsr, VMX_BF_EPT_VPID_CAP_INVEPT_ALL_CTX);
@@ -1504 +1505 @@
                                       | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_PDPTE_1G,                          f1GPage)
                                       | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_INVEPT,                            fInvept)
-                                      | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY,                      fAccessDirty)
-                                      | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_ADVEXITINFO_EPT_VIOLATION,         0)
-                                      | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_SUPER_SHW_STACK,                   0)
+                                    //| RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY,                      0)
+                                    //| RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_ADVEXITINFO_EPT_VIOLATION,         0)
+                                    //| RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_SUPER_SHW_STACK,                   0)
                                       | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_INVEPT_SINGLE_CTX,                 fEptSingle)
                                       | RT_BF_MAKE(VMX_BF_EPT_VPID_CAP_INVEPT_ALL_CTX,                    fEptAll)