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 /arch | |
| 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 'arch')
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 244eb4857e7f..b7dcf07b2499 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -1156,7 +1156,8 @@ EXPORT_SYMBOL_GPL(iommu_add_device); */ static int spapr_tce_platform_iommu_attach_dev(struct iommu_domain *platform_domain, - struct device *dev) + struct device *dev, + struct iommu_domain *old) { struct iommu_domain *domain = iommu_get_domain_for_dev(dev); struct iommu_table_group *table_group; @@ -1189,7 +1190,7 @@ static struct iommu_domain spapr_tce_platform_domain = { static int spapr_tce_blocked_iommu_attach_dev(struct iommu_domain *platform_domain, - struct device *dev) + struct device *dev, struct iommu_domain *old) { struct iommu_group *grp = iommu_group_get(dev); struct iommu_table_group *table_group; |