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Re: [PATCH V2] xen/arm: dm: Drop XEN_DMOP_get_ioreq_server_info from supported
- To: Oleksandr Tyshchenko <Oleksandr_Tyshchenko@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Tue, 2 Sep 2025 12:18:51 +0200
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Tue, 02 Sep 2025 10:19:03 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02/09/2025 11:49, Oleksandr Tyshchenko wrote:
> The said sub-op is not supported on Arm, since it:
> - does not support the buffered emulation (so bufioreq_port/bufioreq_gfn
> cannot be returned), please refer to ioreq_server_create()
> - does not support "legacy" mechanism of mapping IOREQ Server
> magic pages (so ioreq_gfn/bufioreq_gfn cannot be returned), please
> refer to arch_ioreq_server_map_pages(). On Arm, only the Acquire
> Resource infrastructure is used to query and map the IOREQ Server pages.
>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
Could we perhaps add a Fixes tag here pointing to the commit introducing these
DM ops and thus add this patch for this release? Not sure what others think.
~Michal
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