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Re: [PATCH v3 05/11] tools/foreignmem: Support querying the size of a resource
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Mon, 11 Jan 2021 16:54:00 +0100
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <amc96@xxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Paul Durrant <paul@xxxxxxx>, Ian Jackson <iwj@xxxxxxxxxxxxxx>, Michał Leszczyński <michal.leszczynski@xxxxxxx>, Hubert Jasudowicz <hubert.jasudowicz@xxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
- Delivery-date: Mon, 11 Jan 2021 15:54:17 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, Jan 11, 2021 at 03:26:57PM +0000, Andrew Cooper wrote:
> With the Xen side of this interface fixed to return real sizes, userspace
> needs to be able to make the query.
>
> Introduce xenforeignmemory_resource_size() for the purpose, bumping the
> library minor version.
>
> Update both Linux and FreeBSD's osdep_xenforeignmemory_map_resource() to
> understand size requests, skip the mmap() operation, and copy back the
> nr_frames field.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Thanks, Roger.
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