On 01/03/17 16:03, Jan Beulich wrote: >>>> On 27.02.17 at 15:03, <andrew.coop...@citrix.com> wrote: >> The shadow logic should never create a shadow of a guest PTE which contains >> reserved bits from the guests point of view. Such a shadowed entry might not >> cause #PF[RSVD] when walked by hardware, thus won't behave architecturally >> from the guests point of view. > But are we already or-ing in the RSVD bit accordingly in such cases, > before handing the #PF to the guest? The patch here certainly > doesn't make any change towards that, afaics.
The purpose of this patch is to ensure we never create a shadow which risks causing hardware to generate #PF[RSVD] when running on the shadows, other than the one deliberate case (MMIO fastpath). ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
