Re: [Xen-devel] [PATCH v2 REPOST 03/12] x86/mm: add HYPERVISOR_memory_op to acquire guest resources

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: dunlapg@xxxxxxxxx [mailto:dunlapg@xxxxxxxxx] On Behalf Of
> George Dunlap
> Sent: 29 August 2017 12:16
> To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
> Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>; Andrew Cooper
> <Andrew.Cooper3@xxxxxxxxxx>; Jan Beulich <jbeulich@xxxxxxxx>
> Subject: Re: [Xen-devel] [PATCH v2 REPOST 03/12] x86/mm: add
> HYPERVISOR_memory_op to acquire guest resources
> 
> On Tue, Aug 22, 2017 at 3:50 PM, Paul Durrant <paul.durrant@xxxxxxxxxx>
> wrote:
> > Certain memory resources associated with a guest are not necessarily
> > present in the guest P2M and so are not necessarily available to be
> > foreign-mapped by a tools domain unless they are inserted, which risks
> > shattering a super-page mapping.
> >
> > This patch adds a new memory op to allow such resourced to be priv-
> mapped
> > directly, by either a PV or HVM tools domain.
> >
> > NOTE: Whilst the new op is not intrinsicly specific to the x86 architecture,
> >       I have no means to test it on an ARM platform and so cannot verify
> >       that it functions correctly. Hence it is currently only implemented
> >       for x86.
> >
> > Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> 
> p2m bits:
> Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>
> 
> You can retain that ack if the p2m.[ch] parts of the patch remain
> substantially the same.

Ok, thanks :-)

  Paul
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