Re: [PATCH v12 00/17] iommu: SVA and IOPF refactoring

[Jason Gunthorpe <jgg@nvidia.com>]

On Fri, Aug 26, 2022 at 08:11:24PM +0800, Lu Baolu wrote:
> Hi folks,
> 
> The former part of this series introduces the IOMMU interfaces to attach
> or detach an iommu domain to/from a pasid of a device, and refactors the
> exsiting IOMMU SVA implementation by assigning an SVA type of iommu
> domain to a shared virtual address and replacing sva_bind/unbind iommu
> ops with a set_dev_pasid domain ops.
> 
> The latter part changes the existing I/O page fault handling framework
> from only serving SVA to a generic one. Any driver or component could
> handle the I/O page faults for its domain in its own way by installing
> an I/O page fault handler.
> 
> This series has been functionally tested by Tony Zhu on Intel hardware
> and Zhangfei Gao on arm64 (Kunpeng920) hardware. Thanks a lot for the
> efforts. 
> 
> This series is also available on github:
> https://github.com/LuBaolu/intel-iommu/commits/iommu-sva-refactoring-v12
> 
> Please review and suggest.
> 
> Best regards,
> baolu
> 
> Change log:
> v12:
>  - Add blocking domain support in both vt-d and smmuv3 drivers and make
>    the set blocking domain through its own domain ops.
>  - Add a type parameter in iommu_get_domain_for_dev_pasid() to matach
>    the interested domain type.
>  - Only enforce ACS RR & UF in pci_enable_pasid() and refine the commit
>    messages according to Bjorn's suggestions.
>  - Misc code and comment refinement.

I think this is looking pretty good, aside from some minor remarks

Jason