Re: [PATCH v7 01/24] iommu: Add iommu_ops->identity_domain

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On Wed, Aug 23, 2023 at 01:47:15PM -0300, Jason Gunthorpe wrote:
> This allows a driver to set a global static to an IDENTITY domain and
> the core code will automatically use it whenever an IDENTITY domain
> is requested.
> By making it always available it means the IDENTITY can be used in error
> handling paths to force the iommu driver into a known state. Devices
> implementing global static identity domains should avoid failing their
> attach_dev ops.
> To make global static domains simpler allow drivers to omit their free
> function and update the iommufd selftest.
> Convert rockchip to use the new mechanism.
> Tested-by: Steven Price <steven.price@xxxxxxx>
> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> Tested-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Reviewed-by: Lu Baolu <>
> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

Reviewed-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>

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