Re: [Xen-devel] [PATCH] xen/arm: Implement domain_get_maximum_gpfn

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Ian,

On 16/07/14 17:02, Ian Campbell wrote:
> On Wed, 2014-07-09 at 12:38 +0100, Julien Grall wrote:
> > Hi Ian,
> >
> > On 07/01/2014 05:57 PM, Stefano Stabellini wrote:
> > > On Tue, 1 Jul 2014, Julien Grall wrote:
> > > > The function domain_get_maximum_gpfn is returning the maximum gpfn ever
> > > > mapped in the guest. We can use d->arch.p2m.max_mapped_gfn for this purpose.
> > > >
> > > > Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> > > Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > Following the discussion on this thread, I will send a patch to fix
> > xc_dom_gnttab_hvm_seed at least for ARM. Not sure what to do on x86, I
> > may keep the same behavior.
> >
> > I think this patch is still relevant and won't break things as we don't
> > have platform with 48bits PA support.
> >
> > Ian, do I have your ack on this patch?
> Oops, when I first saw this I read the first para and stopped, sorry.
>
> I'd much prefer to just have the fix to xc_dom_gnttab_hvm_seed for ARM
> and continue to punt on this interface until it is actually needed by
> something unavoidable on the guest side (and simultaneously hope that
> day never comes...).
This hypercall is used in 2 difference locations: domain save, and dump 
core.
I expect to have both working on Xen ARM soon. I will also send a fix 
when I will find time for xc_dom_gnttab_hvm_seed.
Regards,

--
Julien Grall

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