Changeset 55713 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

May 7, 2015 11:56:39 AM (10 years ago)

Author:

vboxsync

Message:

Disabled AVX/XSAVE for AMD fam 15h.

File:

• trunk/src/VBox/VMM/VMMR3/CPUMR3CpuId.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR3/CPUMR3CpuId.cpp

@@ -3633 +3633 @@
     AssertLogRelRCReturn(rc, rc);
 
+    /* Currently excluding older AMDs as we're seeing trouble booting 32-bit windows 7, due to
+       KiTrap07++ assuming the high 128-bit YMM component is in init state. Leading to a page fault. */
     bool const fMayHaveXSave = fNestedPagingAndFullGuestExec
                             && pVM->cpum.s.HostFeatures.fXSaveRstor
-                            && pVM->cpum.s.HostFeatures.fOpSysXSaveRstor;
+                            && pVM->cpum.s.HostFeatures.fOpSysXSaveRstor
+                            && !CPUMMICROARCH_IS_AMD_FAM_15H(pVM->cpum.s.HostFeatures.enmMicroarch);
     /** @cfgm{/CPUM/IsaExts/XSAVE, boolean, depends}
      * Expose XSAVE/XRSTOR to the guest if available.  For the time being the