virtio-iommu and fsl_pamu are the only two drivers left that still rely on ops.domain_alloc() Update virtio-iommu to have a global static identity domain, implement domain_alloc_paging(), and finalize its domain during allocation instead of on first attach. As virtio-iommu was the last real iommu driver using domain_alloc() update the core code to isolate the remains to fsl_pamu. I tested this using qemu x86 7.0.0 and 9.2.0 with a mlx5 VFIO PCI device. The kernel behaves the same after this series. However, there seem to be some unrelated qemu bugs. 7.0.0 does not have working VIRTIO_IOMMU_F_BYPASS_CONFIG and neither qemu works with an IDENTITY domain using !VIRTIO_IOMMU_F_BYPASS_CONFIG. It prints: qemu-system-x86_64: iommu has granularity incompatible with target AS qemu-system-x86_64: iommu map to non memory area 80000000 qemu-system-x86_64: iommu map to non memory area c0000000 qemu-system-x86_64: iommu map to non memory area e0000000 qemu-system-x86_64: iommu map to non memory area f0000000 qemu-system-x86_64: iommu map to non memory area f8000000 qemu-system-x86_64: iommu map to non memory area fc000000 qemu-system-x86_64: iommu map to non memory area fe000000 qemu-system-x86_64: iommu map to non memory area fe800000 qemu-system-x86_64: iommu map to non memory area 0 qemu-system-x86_64: iommu map to non memory area fef00000 qemu-system-x86_64: iommu map to non memory area ff000000 qemu-system-x86_64: iommu has granularity incompatible with target AS qemu-system-x86_64: iommu map to non memory area 200000000 qemu-system-x86_64: iommu map to non memory area 400000000 qemu-system-x86_64: iommu map to non memory area 800000000 qemu-system-x86_64: iommu map to non memory area 1000000000 qemu-system-x86_64: iommu map to non memory area 2000000000 qemu-system-x86_64: iommu map to non memory area 4000000000 Jason Gunthorpe (5): iommu/virtio: Break out bypass identity support into a global static iommu: Add domain_alloc_identity() iommu/virtio: Move to domain_alloc_paging() iommu: Do not call domain_alloc() in iommu_sva_domain_alloc() iommu: Hide ops.domain_alloc behind CONFIG_FSL_PAMU drivers/iommu/iommu-sva.c | 15 ++- drivers/iommu/iommu.c | 16 +-- drivers/iommu/virtio-iommu.c | 200 +++++++++++++++++++++-------------- include/linux/iommu.h | 10 +- 4 files changed, 141 insertions(+), 100 deletions(-) base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b -- 2.43.0
