Re: [PATCH v6 10/16] libs/guest: add xg_foreignmemory_copy_{from,to}

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Fri, Jun 19, 2026 at 02:04:55PM +0100, Frediano Ziglio wrote:
> This change prepare code to use a new "foreign copy" hypercall.
> The new hypercall will copy memory from/to a foreign domain.
> The new hypercall can be emulated with a sequence of:
> - map foreign memory;
> - copy memory;
> - unmap foreign memory.

I don't understand the point of this patch. The hypercall doesn't exist
so there's nothing to emulate.

I've notice there's a patch later in the series which introduce a new
hypercall, but the changes to the library should come after the
hypercall is been introduced, only then can we check if the emulation is
correct, or even needed.

Cheers,


--
Anthony Perard | Vates XCP-ng Developer

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