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charset="utf-8" Introduce a new enum iommu_viommu_type (IOMMU_VIOMMU_TYPE_AMD) for AMD vIOMMU along with the struct iommu_viommu_amd, which is used to initialize IOMMUFD vIOMMU instance when calling struct iommu_ops.viommu_init(). Also, hook up struct iomufd_viomu_ops.alloc_domain_nested to connect nested domain allocation with AMD vIOMMU implementation. Additional initialization will be added in subsequent patches. Signed-off-by: Suravee Suthikulpanit --- drivers/iommu/amd/iommufd.c | 4 ++++ include/uapi/linux/iommufd.h | 10 ++++++++++ 2 files changed, 14 insertions(+) diff --git a/drivers/iommu/amd/iommufd.c b/drivers/iommu/amd/iommufd.c index ad627fd5ccc7..e7ffa7e8915b 100644 --- a/drivers/iommu/amd/iommufd.c +++ b/drivers/iommu/amd/iommufd.c @@ -34,6 +34,9 @@ void *amd_iommufd_hw_info(struct device *dev, u32 *length= , u32 *type) =20 size_t amd_iommufd_get_viommu_size(struct device *dev, enum iommu_viommu_t= ype viommu_type) { + if (viommu_type !=3D IOMMU_VIOMMU_TYPE_AMD) + return 0; + return VIOMMU_STRUCT_SIZE(struct amd_iommu_viommu, core); } =20 @@ -73,5 +76,6 @@ static void amd_iommufd_viommu_destroy(struct iommufd_vio= mmu *viommu) * struct iommufd_viommu_ops - vIOMMU specific operations */ static const struct iommufd_viommu_ops amd_viommu_ops =3D { + .alloc_domain_nested =3D amd_iommu_alloc_domain_nested, .destroy =3D amd_iommufd_viommu_destroy, }; diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index 1dafbc552d37..3a2ac7234b9e 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -1048,11 +1048,13 @@ struct iommu_fault_alloc { * @IOMMU_VIOMMU_TYPE_ARM_SMMUV3: ARM SMMUv3 driver specific type * @IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV (extension for= ARM * SMMUv3) enabled ARM SMMUv3 type + * @IOMMU_VIOMMU_TYPE_AMD: AMD HW-vIOMMU type */ enum iommu_viommu_type { IOMMU_VIOMMU_TYPE_DEFAULT =3D 0, IOMMU_VIOMMU_TYPE_ARM_SMMUV3 =3D 1, IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV =3D 2, + IOMMU_VIOMMU_TYPE_AMD =3D 3, }; =20 /** @@ -1071,6 +1073,14 @@ struct iommu_viommu_tegra241_cmdqv { __aligned_u64 out_vintf_mmap_length; }; =20 +/** + * struct iommu_viommu_amd - AMD vIOMMU Interface (IOMMU_VIOMMU_TYPE_AMD) + * @reserved: Must be zero + */ +struct iommu_viommu_amd { + __u32 reserved; /* must be last */ +}; + /** * struct iommu_viommu_alloc - ioctl(IOMMU_VIOMMU_ALLOC) * @size: sizeof(struct iommu_viommu_alloc) --=20 2.34.1