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

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.


Julien Grall

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