diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2025-07-09 22:59:15 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-07-11 14:34:35 -0300 |
| commit | 61dd912ee02e4d1d412e1090c6e5d7f8cd0779df (patch) | |
| tree | 3c58b83921f966ca13a4f0be4abae88cf0f10a47 | |
| parent | 3a35f7d4a4673edf6f02422bb2d78b17c667e167 (diff) | |
iommu/arm-smmu-v3-iommufd: Add vsmmu_size/type and vsmmu_init impl ops
An impl driver might want to allocate its own type of vIOMMU object or the
standard IOMMU_VIOMMU_TYPE_ARM_SMMUV3 by setting up its own SW/HW bits, as
the tegra241-cmdqv driver will add IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV.
Add vsmmu_size/type and vsmmu_init to struct arm_smmu_impl_ops. Prioritize
them in arm_smmu_get_viommu_size() and arm_vsmmu_init().
Link: https://patch.msgid.link/r/375ac2b056764534bb7c10ecc4f34a0bae82b108.1752126748.git.nicolinc@nvidia.com
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 8 | ||||
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 5 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c index eb9fe1f6311a..2ab1c6cf4aac 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c @@ -416,6 +416,10 @@ size_t arm_smmu_get_viommu_size(struct device *dev, !(smmu->features & ARM_SMMU_FEAT_S2FWB)) return 0; + if (smmu->impl_ops && smmu->impl_ops->vsmmu_size && + viommu_type == smmu->impl_ops->vsmmu_type) + return smmu->impl_ops->vsmmu_size; + if (viommu_type != IOMMU_VIOMMU_TYPE_ARM_SMMUV3) return 0; @@ -439,6 +443,10 @@ int arm_vsmmu_init(struct iommufd_viommu *viommu, /* FIXME Move VMID allocation from the S2 domain allocation to here */ vsmmu->vmid = s2_parent->s2_cfg.vmid; + if (smmu->impl_ops && smmu->impl_ops->vsmmu_init && + viommu->type == smmu->impl_ops->vsmmu_type) + return smmu->impl_ops->vsmmu_init(vsmmu, user_data); + viommu->ops = &arm_vsmmu_ops; return 0; } diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index c1ced4d4b6d1..6183f212539a 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -16,6 +16,7 @@ #include <linux/sizes.h> struct arm_smmu_device; +struct arm_vsmmu; /* MMIO registers */ #define ARM_SMMU_IDR0 0x0 @@ -720,6 +721,10 @@ struct arm_smmu_impl_ops { int (*init_structures)(struct arm_smmu_device *smmu); struct arm_smmu_cmdq *(*get_secondary_cmdq)( struct arm_smmu_device *smmu, struct arm_smmu_cmdq_ent *ent); + const size_t vsmmu_size; + const enum iommu_viommu_type vsmmu_type; + int (*vsmmu_init)(struct arm_vsmmu *vsmmu, + const struct iommu_user_data *user_data); }; /* An SMMUv3 instance */ |