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Re: [PATCH v2 03/18] IOMMU: have vendor code announce supported page sizes
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Tue, 30 Nov 2021 13:25:15 +0100
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Rahul Singh <Rahul.Singh@xxxxxxx>
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Fri, Sep 24, 2021 at 11:43:57AM +0200, Jan Beulich wrote:
> Generic code will use this information to determine what order values
> can legitimately be passed to the ->{,un}map_page() hooks. For now all
> ops structures simply get to announce 4k mappings (as base page size),
> and there is (and always has been) an assumption that this matches the
> CPU's MMU base page size (eventually we will want to permit IOMMUs with
> a base page size smaller than the CPU MMU's).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Thanks, Roger.
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