Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-06 Thread Tim Deegan
At 12:26 + on 02 Mar (1488457613), Andrew Cooper wrote: > On 01/03/17 16:03, Jan Beulich wrote: > On 27.02.17 at 15:03, 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 >

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-02 Thread Andrew Cooper
On 02/03/17 13:19, Jan Beulich wrote: On 02.03.17 at 13:56, wrote: >> On 02/03/17 12:51, Jan Beulich wrote: >> On 02.03.17 at 13:26, wrote: On 01/03/17 16:03, Jan Beulich wrote: On 27.02.17 at 15:03, wrote: >> The shadow logic should never create a shadow of a guest PT

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-02 Thread Tim Deegan
At 14:03 + on 27 Feb (1488204196), Andrew Cooper wrote: > The shadow logic should never create a shadow of a guest PTE which contains Nit: a _valid/present_ shadow. > reserved bits from the guests point of view. Such a shadowed entry might not > cause #PF[RSVD] when walked by hardware, thus

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-02 Thread Jan Beulich
>>> On 02.03.17 at 13:56, wrote: > On 02/03/17 12:51, Jan Beulich wrote: > On 02.03.17 at 13:26, wrote: >>> On 01/03/17 16:03, Jan Beulich wrote: >>> On 27.02.17 at 15:03, wrote: > The shadow logic should never create a shadow of a guest PTE which > contains > reserved bits

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-02 Thread Andrew Cooper
On 02/03/17 12:51, Jan Beulich wrote: On 02.03.17 at 13:26, wrote: >> On 01/03/17 16:03, Jan Beulich wrote: >> On 27.02.17 at 15:03, 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

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-02 Thread Jan Beulich
>>> On 02.03.17 at 13:26, wrote: > On 01/03/17 16:03, Jan Beulich wrote: > On 27.02.17 at 15:03, 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] wh

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-02 Thread Andrew Cooper
On 01/03/17 16:03, Jan Beulich wrote: On 27.02.17 at 15:03, 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 arch

Re: [Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-03-01 Thread Jan Beulich
>>> On 27.02.17 at 15:03, 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 vie

[Xen-devel] [PATCH 5/7] x86/shadow: Use the pagewalk reserved bits helpers

2017-02-27 Thread Andrew Cooper
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. Signed-off-by: Andrew Cooper --- CC: