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@xxxxxxxxxx> > --- > drivers/iommu/tegra-smmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Reviewed-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
