[PATCH v2 10/14] iommu/arm-smmu-v3: Replace arm_vsmmu_alloc with arm_vsmmu_init

[Jason Gunthorpe]

On Fri, Jun 13, 2025 at 11:35:22PM -0700, Nicolin Chen wrote:
> To ease the for-driver iommufd APIs, get_viommu_size and viommu_init ops
> are introduced.
> 
> Sanitize the inputs and report the size of struct arm_vsmmu on success, in
> arm_smmu_get_viommu_size().
> 
> Place the type sanity at the last, becase there will be soon an impl level
> get_viommu_size op, which will require the same sanity tests prior. It can
> simply insert a piece of code in front of the IOMMU_VIOMMU_TYPE_ARM_SMMUV3
> sanity.
> 
> The core will ensure the viommu_type is set to the core vIOMMU object, and
> pass in the same dev pointer, so arm_vsmmu_init() won't need to repeat the
> same sanity tests but to simply init the arm_vsmmu struct.
> 
> Remove the arm_vsmmu_alloc, completing the replacement.
> 
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>
> ---
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   | 11 +++--
>  .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c     | 46 ++++++++++---------
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   |  3 +-
>  3 files changed, 32 insertions(+), 28 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason