Changeset 56672 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

Jun 29, 2015 12:53:55 PM (9 years ago)

Author:

vboxsync

Message:

VMM/GIM: Workaround PGM issue with large pages in Hyper-V by directly rewriting guest memory than using the MMIO2 mapping.

File:

• trunk/src/VBox/VMM/VMMR0/GIMR0Hv.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR0/GIMR0Hv.cpp

@@ -99 +99 @@
         return VERR_GIM_PVTSC_NOT_ENABLED;
 
+    /** @todo this is buggy when large pages are used due to a PGM limitation, see
+     *        @bugref{7532}.
+     *
+     *        In any case, we do not ever update this page while the guest is
+     *        running after setting it up (in ring-3, see gimR3HvEnableTscPage()) as
+     *        the TSC offset is handled in the VMCS/VMCB (HM) or by trapping RDTSC
+     *        (raw-mode). */
+#if 0
     PCGIMHV          pcHv     = &pVM->gim.s.u.Hv;
     PCGIMMMIO2REGION pcRegion = &pcHv->aMmio2Regions[GIM_HV_REF_TSC_PAGE_REGION_IDX];
@@ -128 +136 @@
     Assert(pRefTsc->u32TscSequence != 0);
     Assert(pRefTsc->u32TscSequence != UINT32_C(0xffffffff));
+#endif
     return VINF_SUCCESS;
 }