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Re: [PATCH v3 03/23] xen/arm: smmuv3: Alloc io_domain for each device
- To: Milan Djokic <milan_djokic@xxxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Fri, 10 Apr 2026 09:57:36 +0000
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Rahul Singh <Rahul.Singh@xxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Fri, 10 Apr 2026 09:58:50 +0000
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- Thread-topic: [PATCH v3 03/23] xen/arm: smmuv3: Alloc io_domain for each device
Hi Milan,
> On 31 Mar 2026, at 02:52, Milan Djokic <milan_djokic@xxxxxxxx> wrote:
>
> From: Rahul Singh <rahul.singh@xxxxxxx>
>
> In current implementation io_domain is allocated once for each xen
> domain as Stage2 translation is common for all devices in same xen
> domain.
>
> Nested stage supports S1 and S2 configuration at the same time. Stage1
> translation will be different for each device as linux kernel will
> allocate page-table for each device.
>
> Alloc io_domain for each device so that each device can have different
> Stage-1 and Stage-2 configuration structure.
>
> Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
> Signed-off-by: Milan Djokic <milan_djokic@xxxxxxxx>
> ---
Looks ok to me
Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Cheers,
Luca
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