diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2023-07-28 08:33:24 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-07-28 18:31:24 +0200 |
| commit | 5d5c85ff6246c1b70b3b75a0b9d9fe749d0a5652 (patch) | |
| tree | 2c3ace1920746b2091ef9b27380a0845030ca57f /drivers | |
| parent | vfio: Do not allow !ops->dma_unmap in vfio_pin/unpin_pages() (diff) | |
| download | linux-5d5c85ff6246c1b70b3b75a0b9d9fe749d0a5652.tar.xz linux-5d5c85ff6246c1b70b3b75a0b9d9fe749d0a5652.zip | |
iommufd: Allow passing in iopt_access_list_id to iopt_remove_access()
This is a preparatory change for ioas replacement support for accesses.
The replacement routine does an iopt_add_access() for a new IOAS first and
then iopt_remove_access() for the old IOAS upon the success of the first
call. However, the first call overrides the iopt_access_list_id in the
access struct, resulting in iopt_remove_access() being unable to work on
the old IOAS.
Add an iopt_access_list_id as a parameter to iopt_remove_access, so the
replacement routine can save the id before it gets overwritten. Pass the
id in iopt_remove_access() for a proper cleanup.
The existing callers should just pass in access->iopt_access_list_id.
Link: https://lore.kernel.org/r/7bb939b9e0102da0c099572bb3de78ab7622221e.1690523699.git.nicolinc@nvidia.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/iommufd/device.c | 6 | ||||
| -rw-r--r-- | drivers/iommu/iommufd/io_pagetable.c | 6 | ||||
| -rw-r--r-- | drivers/iommu/iommufd/iommufd_private.h | 3 |
3 files changed, 9 insertions, 6 deletions
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 57c0e81f5073..7a3e8660b902 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -690,7 +690,8 @@ void iommufd_access_destroy_object(struct iommufd_object *obj) container_of(obj, struct iommufd_access, obj); if (access->ioas) { - iopt_remove_access(&access->ioas->iopt, access); + iopt_remove_access(&access->ioas->iopt, access, + access->iopt_access_list_id); refcount_dec(&access->ioas->obj.users); access->ioas = NULL; } @@ -776,7 +777,8 @@ void iommufd_access_detach(struct iommufd_access *access) access->ops->unmap(access->data, 0, ULONG_MAX); mutex_lock(&access->ioas_lock); } - iopt_remove_access(&cur_ioas->iopt, access); + iopt_remove_access(&cur_ioas->iopt, access, + access->iopt_access_list_id); refcount_dec(&cur_ioas->obj.users); out: access->ioas_unpin = NULL; diff --git a/drivers/iommu/iommufd/io_pagetable.c b/drivers/iommu/iommufd/io_pagetable.c index 4d095115c2d0..3a598182b761 100644 --- a/drivers/iommu/iommufd/io_pagetable.c +++ b/drivers/iommu/iommufd/io_pagetable.c @@ -1158,12 +1158,12 @@ out_unlock: } void iopt_remove_access(struct io_pagetable *iopt, - struct iommufd_access *access) + struct iommufd_access *access, + u32 iopt_access_list_id) { down_write(&iopt->domains_rwsem); down_write(&iopt->iova_rwsem); - WARN_ON(xa_erase(&iopt->access_list, access->iopt_access_list_id) != - access); + WARN_ON(xa_erase(&iopt->access_list, iopt_access_list_id) != access); WARN_ON(iopt_calculate_iova_alignment(iopt)); up_write(&iopt->iova_rwsem); up_write(&iopt->domains_rwsem); diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index dba730129b8c..8ba786bc95ff 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -323,7 +323,8 @@ struct iommufd_access { int iopt_add_access(struct io_pagetable *iopt, struct iommufd_access *access); void iopt_remove_access(struct io_pagetable *iopt, - struct iommufd_access *access); + struct iommufd_access *access, + u32 iopt_access_list_id); void iommufd_access_destroy_object(struct iommufd_object *obj); #ifdef CONFIG_IOMMUFD_TEST |