Re: [PATCH 2/5] iommu: Call helper function to get assigned pasid value

From: Baolu Lu
Date: Wed Aug 09 2023 - 06:58:24 EST


On 2023/8/9 17:49, Tian, Kevin wrote:
From: Baolu Lu <baolu.lu@xxxxxxxxxxxxxxx>
Sent: Wednesday, August 9, 2023 8:22 AM

On 2023/8/8 15:49, Tina Zhang wrote:
Use the helper function mm_get_pasid() to get the mm assigned pasid
value.

For internal iommu drivers, perhaps we should use another helper.
Something like sva_domain_get_pasid()?

Suppose that the iommu drivers should have no idea about the "mm".


Aren't all touched functions accept a struct mm_struct pointer?

In the end we should remove all mm reference in the individual drivers.
The drivers only need to know what they need to know. All mm-aware code
should eventually be moved to the core.

For now, at least we should avoid using mm in the set/remove_dev_pasid
code path. Later, once we complete consolidating mm notification in the
core, drivers will have no need to use "mm" anymore.

Best regards,
baolu