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Re: [PATCH 00/20] Add SMMUv3 Stage 1 Support for XEN guests
- To: Milan Djokic <milan_djokic@xxxxxxxx>
- From: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Date: Thu, 27 Nov 2025 02:31:32 +0000
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- Cc: Julien Grall <julien@xxxxxxx>, Julien Grall <julien.grall.oss@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Rahul Singh <rahul.singh@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Nick Rosbrook <enr0n@xxxxxxxxxx>, George Dunlap <gwd@xxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Delivery-date: Thu, 27 Nov 2025 02:32:10 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHcB7wdmg15F24Gc0ClRsxpCVedRA==
- Thread-topic: [PATCH 00/20] Add SMMUv3 Stage 1 Support for XEN guests
Hi Milan,
Milan Djokic <milan_djokic@xxxxxxxx> writes:
> On 9/1/25 13:06, Milan Djokic wrote:
[...]
>
> Hello Volodymyr, Julien
>
> Sorry for the delayed follow-up on this topic.
> We have changed vIOMMU design from 1-N to N-N mapping between vIOMMU
> and pIOMMU. Considering single vIOMMU model limitation pointed out by
> Volodymyr (SID overlaps), vIOMMU-per-pIOMMU model turned out to be the
> only proper solution.
> Following is the updated design document.
> I have added additional details to the design and performance impact
> sections, and also indicated future improvements. Security
> considerations section is unchanged apart from some minor details
> according to review comments.
> Let me know what do you think about updated design. Once approved, I
> will send the updated vIOMMU patch series.
This looks fine for me. I can't see any immediate flaws here. So let's
get to patches :)
[...]
--
WBR, Volodymyr
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