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Re: [PATCH 0/6] gnttab: add per-domain controls
- To: Christian Lindig <christian.lindig@xxxxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Mon, 20 Sep 2021 09:26:29 +0200
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- Cc: Edwin Torok <edvin.torok@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Ian Jackson <iwj@xxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony Perard <anthony.perard@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, David Scott <dave@xxxxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Fri, Sep 17, 2021 at 06:06:42PM +0200, Christian Lindig wrote:
>
>
> > On 17 Sep 2021, at 16:46, Roger Pau Monne <roger.pau@xxxxxxxxxx> wrote:
> >
> > Hello,
> >
> > The first two patches of this series allows setting the preisoutly host
> > wide command line `gnttab` option on a per domain basis. That means
> > selecting the max allowed grant table version and whether transitive
> > grants are allowed.
> >
> > The last 4 patches attempt to implement support for creating guests
> > without grant table support at all. This requires some changes to
> > xenstore in order to map shared ring using foreign memory instead of
> > grant table.
> >
> > Note that patch 5 will break the save format for xenstore records, and
> > should not be applied.
>
> Has this relevance for the format used by oxenstored?
I'm no expert on oxenstored, but I think it has always mapped the
shared ring as foreign memory, and hence no changes are needed there.
AFAICT it also stores the mfn on the save format, so I think this is
all fine.
Should have mentioned it on the cover letter.
Thanks, Roger.
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