averello/linux-stable-mirror
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2026-05-26 11:40:24 +02:00
Code Issues Packages Projects Releases Wiki Activity

iommu/arm-smmu-v3-iommufd: Add vsmmu_size/type and vsmmu_init impl ops

Browse Source 
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>
This commit is contained in:
Nicolin Chen
2025-07-09 22:59:15 -07:00
committed by Jason Gunthorpe
parent 3a35f7d4a4
commit 61dd912ee0
2 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c
+8
View File
@@ -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;
}
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+5
View File
@@ -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 */