Re: [PATCH v2 6/6] iommu: Make set_dev_pasid op support domain replacement

On Thu, Sep 12, 2024 at 06:04:27AM -0700, Yi Liu wrote:

The iommu core is going to support domain replacement for pasid, it needs to make the set_dev_pasid op support replacing domain and keep the old domain config in the failure case.

AMD iommu driver does not support domain replacement for pasid yet, so it would fail the set_dev_pasid op to keep the old config if the input @old is non-NULL.

Suggested-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Yi Liu yi.l.liu@intel.com

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drivers/iommu/amd/pasid.c | 3 +++ include/linux/iommu.h | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Jason Gunthorpe jgg@nvidia.com

Jason