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| author | Yi Liu <yi.l.liu@intel.com> | 2023-10-25 21:39:34 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-26 11:15:57 -0300 |
| commit | 2bdabb8e82f564d19eeeb7c83e6b2467af0707cb (patch) | |
| tree | e7cb91fa47868cfa9ee194c2b078fb5542b865c2 /drivers/iommu/amd | |
| parent | b5021cb264e67baf051569a41debe277c279952b (diff) | |
| download | lwn-2bdabb8e82f564d19eeeb7c83e6b2467af0707cb.tar.gz lwn-2bdabb8e82f564d19eeeb7c83e6b2467af0707cb.zip | |
iommu: Pass in parent domain with user_data to domain_alloc_user op
domain_alloc_user op already accepts user flags for domain allocation, add
a parent domain pointer and a driver specific user data support as well.
The user data would be tagged with a type for iommu drivers to add their
own driver specific user data per hw_pagetable.
Add a struct iommu_user_data as a bundle of data_ptr/data_len/type from an
iommufd core uAPI structure. Make the user data opaque to the core, since
a userspace driver must match the kernel driver. In the future, if drivers
share some common parameter, there would be a generic parameter as well.
Link: https://lore.kernel.org/r/20231026043938.63898-7-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Co-developed-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index caad10f9cee3..b399c5741378 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2219,12 +2219,15 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned int type) return domain; } -static struct iommu_domain *amd_iommu_domain_alloc_user(struct device *dev, - u32 flags) +static struct iommu_domain * +amd_iommu_domain_alloc_user(struct device *dev, u32 flags, + struct iommu_domain *parent, + const struct iommu_user_data *user_data) + { unsigned int type = IOMMU_DOMAIN_UNMANAGED; - if (flags & ~IOMMU_HWPT_ALLOC_DIRTY_TRACKING) + if ((flags & ~IOMMU_HWPT_ALLOC_DIRTY_TRACKING) || parent || user_data) return ERR_PTR(-EOPNOTSUPP); return do_iommu_domain_alloc(type, dev, flags); |