diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-09-13 15:43:34 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-09-25 11:40:51 +0200 |
| commit | df31b298477e65a01deff0af352be3a61524d930 (patch) | |
| tree | 1cde8d103f418be2300368ca22a608f407bf375d /drivers/iommu/rockchip-iommu.c | |
| parent | Linux 6.6-rc3 (diff) | |
| download | linux-df31b298477e65a01deff0af352be3a61524d930.tar.xz linux-df31b298477e65a01deff0af352be3a61524d930.zip | |
iommu: Add iommu_ops->identity_domain
This allows a driver to set a global static to an IDENTITY domain and
the core code will automatically use it whenever an IDENTITY domain
is requested.
By making it always available it means the IDENTITY can be used in error
handling paths to force the iommu driver into a known state. Devices
implementing global static identity domains should avoid failing their
attach_dev ops.
To make global static domains simpler allow drivers to omit their free
function and update the iommufd selftest.
Convert rockchip to use the new mechanism.
Tested-by: Steven Price <steven.price@arm.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v8-81230027b2fa+9d-iommu_all_defdom_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/rockchip-iommu.c')
| -rw-r--r-- | drivers/iommu/rockchip-iommu.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 8ff69fbf9f65..033678f2f8b3 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -989,13 +989,8 @@ static int rk_iommu_identity_attach(struct iommu_domain *identity_domain, return 0; } -static void rk_iommu_identity_free(struct iommu_domain *domain) -{ -} - static struct iommu_domain_ops rk_identity_ops = { .attach_dev = rk_iommu_identity_attach, - .free = rk_iommu_identity_free, }; static struct iommu_domain rk_identity_domain = { @@ -1059,9 +1054,6 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type) { struct rk_iommu_domain *rk_domain; - if (type == IOMMU_DOMAIN_IDENTITY) - return &rk_identity_domain; - if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; @@ -1186,6 +1178,7 @@ static int rk_iommu_of_xlate(struct device *dev, } static const struct iommu_ops rk_iommu_ops = { + .identity_domain = &rk_identity_domain, .domain_alloc = rk_iommu_domain_alloc, .probe_device = rk_iommu_probe_device, .release_device = rk_iommu_release_device, |