diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2025-10-22 19:21:09 -0700 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2025-10-27 13:55:35 +0100 |
| commit | fd714986e4e46effa6697b13d32918fc59608ccb (patch) | |
| tree | bce7a8b433a5cf10f819d278931c92652e2b30ec /drivers/iommu/intel/iommu.c | |
| parent | 2b33598e666d0c7b761148ffee86140238968861 (diff) | |
iommu: Pass in old domain to attach_dev callback functions
The IOMMU core attaches each device to a default domain on probe(). Then,
every new "attach" operation has a fundamental meaning of two-fold:
- detach from its currently attached (old) domain
- attach to a given new domain
Modern IOMMU drivers following this pattern usually want to clean up the
things related to the old domain, so they call iommu_get_domain_for_dev()
to fetch the old domain.
Pass in the old domain pointer from the core to drivers, aligning with the
set_dev_pasid op that does so already.
Ensure all low-level attach fcuntions in the core can forward the correct
old domain pointer. Thus, rework those functions as well.
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/intel/iommu.c')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index e236c7ec221f..f0396591cd9b 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -3230,7 +3230,8 @@ void device_block_translation(struct device *dev) } static int blocking_domain_attach_dev(struct iommu_domain *domain, - struct device *dev) + struct device *dev, + struct iommu_domain *old) { struct device_domain_info *info = dev_iommu_priv_get(dev); @@ -3537,7 +3538,8 @@ int paging_domain_compatible(struct iommu_domain *domain, struct device *dev) } static int intel_iommu_attach_device(struct iommu_domain *domain, - struct device *dev) + struct device *dev, + struct iommu_domain *old) { int ret; @@ -4401,7 +4403,9 @@ static int device_setup_pass_through(struct device *dev) context_setup_pass_through_cb, dev); } -static int identity_domain_attach_dev(struct iommu_domain *domain, struct device *dev) +static int identity_domain_attach_dev(struct iommu_domain *domain, + struct device *dev, + struct iommu_domain *old) { struct device_domain_info *info = dev_iommu_priv_get(dev); struct intel_iommu *iommu = info->iommu; |