RE: [PATCH v2 1/4] iommu/vt-d: Block PASID attachment to nested domain with dirty tracking

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From: Tian, Kevin

Date: Tue Mar 31 2026 - 03:24:58 EST

> From: Duan, Zhenzhong <zhenzhong.duan@xxxxxxxxx>
> Sent: Monday, March 30, 2026 6:11 PM
>
> Kernel lacks dirty tracking support on nested domain attached to PASID,
> fails the attachment early if nesting parent domain is dirty tracking
> configured, otherwise dirty pages would be lost.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: f35f22cc760e ("iommu/vt-d: Access/Dirty bit support for SS domains")
> Suggested-by: Kevin Tian <kevin.tian@xxxxxxxxx>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@xxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>