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RE: [PATCH 04/10] iommu/ipmmu-vmsa: Add light version of Linux's ipmmu_features
- To: Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
- Date: Tue, 14 Dec 2021 12:05:56 +0000
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- Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>
- Delivery-date: Tue, 14 Dec 2021 12:06:11 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHX47d5KD29OXhbPEy75XHCjn67uqwx+H8g
- Thread-topic: [PATCH 04/10] iommu/ipmmu-vmsa: Add light version of Linux's ipmmu_features
Hello Oleksandr-san,
> From: Oleksandr Tyshchenko, Sent: Sunday, November 28, 2021 2:52 AM
>
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
>
> This is a prereq work needed to add support for S4 series easily
> in the future.
>
> We don't need to pull the whole struct and all instances as Xen
> driver doesn't support old Arm32 based Gen2 SoCs, so there is no
> point in keeping all differences between Gen2 and Gen3 here.
> All what we need is a minimal support to be able to operate with
> Gen3 and new S4.
>
> Add Gen3 specific info with only two fields (number_of_contexts and
> num_utlbs) for now, the subsequent patches will add remaining bits.
>
> No change in behavior.
>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Thank you for the patch!
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Best regards,
Yoshihiro Shimoda
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