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author | Nicolin Chen <nicolinc@nvidia.com> | 2023-07-27 23:33:27 -0700 |
---|---|---|
committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-07-28 13:31:24 -0300 |
commit | 70c16123d865046899c36e3655b2d611f38f51a3 (patch) | |
tree | e5c25fcd721a5141d37966c544fc7832b2776f16 | |
parent | 6129b59fcdf374b5d82e1f4518884da13de38b1a (diff) | |
download | linux-stable-70c16123d865046899c36e3655b2d611f38f51a3.tar.gz linux-stable-70c16123d865046899c36e3655b2d611f38f51a3.tar.bz2 linux-stable-70c16123d865046899c36e3655b2d611f38f51a3.zip |
iommufd: Add iommufd_access_replace() API
Taking advantage of the new iommufd_access_change_ioas_id helper, add an
iommufd_access_replace() API for the VFIO emulated pathway to use.
Link: https://lore.kernel.org/r/a3267b924fd5f45e0d3a1dd13a9237e923563862.1690523699.git.nicolinc@nvidia.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
-rw-r--r-- | drivers/iommu/iommufd/device.c | 15 | ||||
-rw-r--r-- | include/linux/iommufd.h | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index c0b9cd97ec58..4c37eeea2bcd 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -849,6 +849,21 @@ int iommufd_access_attach(struct iommufd_access *access, u32 ioas_id) } EXPORT_SYMBOL_NS_GPL(iommufd_access_attach, IOMMUFD); +int iommufd_access_replace(struct iommufd_access *access, u32 ioas_id) +{ + int rc; + + mutex_lock(&access->ioas_lock); + if (!access->ioas) { + mutex_unlock(&access->ioas_lock); + return -ENOENT; + } + rc = iommufd_access_change_ioas_id(access, ioas_id); + mutex_unlock(&access->ioas_lock); + return rc; +} +EXPORT_SYMBOL_NS_GPL(iommufd_access_replace, IOMMUFD); + /** * iommufd_access_notify_unmap - Notify users of an iopt to stop using it * @iopt: iopt to work on diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 0ac60256b659..ffc3a949f837 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -49,6 +49,7 @@ iommufd_access_create(struct iommufd_ctx *ictx, const struct iommufd_access_ops *ops, void *data, u32 *id); void iommufd_access_destroy(struct iommufd_access *access); int iommufd_access_attach(struct iommufd_access *access, u32 ioas_id); +int iommufd_access_replace(struct iommufd_access *access, u32 ioas_id); void iommufd_access_detach(struct iommufd_access *access); void iommufd_ctx_get(struct iommufd_ctx *ictx); |