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Re: [PATCH] xen/arm: smmu: Set/clear IOMMU domain for device
- To: Oleksandr Andrushchenko <andr2000@xxxxxxxxx>
- From: Rahul Singh <Rahul.Singh@xxxxxxx>
- Date: Tue, 17 Aug 2021 10:38:17 +0000
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
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- Thread-topic: [PATCH] xen/arm: smmu: Set/clear IOMMU domain for device
Hi Oleksandr,
> On 11 Aug 2021, at 2:03 pm, Oleksandr Andrushchenko <andr2000@xxxxxxxxx>
> wrote:
>
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
>
> When a device is assigned/de-assigned it is required to properly set
> IOMMU domain used to protect the device. This assignment was missing,
> thus it was not possible to de-assign the device:
>
> (XEN) Deassigning device 0000:03:00.0 from dom2
> (XEN) smmu: 0000:03:00.0: not attached to domain 2
> (XEN) d2: deassign (0000:03:00.0) failed (-3)
>
> Fix this by assigning IOMMU domain on arm_smmu_assign_dev and reset it
> to NULL on arm_smmu_deassign_dev.
>
> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Reviewed-by: Rahul Singh <rahul.singh@xxxxxxx>
Regards,
Rahul
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