[PATCH v7 12/24] iommu/tegra-smmu: Support DMA domains in tegra

[Jerry Snitselaar]

On Wed, Aug 23, 2023 at 01:47:26PM -0300, Jason Gunthorpe wrote:
> All ARM64 iommu drivers should support IOMMU_DOMAIN_DMA to enable
> dma-iommu.c.
> 
> tegra is blocking dma-iommu usage, and also default_domain's, because it
> wants an identity translation. This is needed for some device quirk. The
> correct way to do this is to support IDENTITY domains and use
> ops->def_domain_type() to return IOMMU_DOMAIN_IDENTITY for only the quirky
> devices.
> 
> Add support for IOMMU_DOMAIN_DMA and force IOMMU_DOMAIN_IDENTITY mode for
> everything so no behavior changes.
> 
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
> ---
>  drivers/iommu/tegra-smmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Reviewed-by: Jerry Snitselaar <jsnitsel at redhat.com>