On 2023/7/25 1:21, Jason Gunthorpe wrote:
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. Convert rockchip to use the new mechanism. Tested-by: Steven Price<steven.price@xxxxxxx> Tested-by: Marek Szyprowski<m.szyprowski@xxxxxxxxxxx> Tested-by: Nicolin Chen<nicolinc@xxxxxxxxxx> Signed-off-by: Jason Gunthorpe<jgg@xxxxxxxxxx> --- drivers/iommu/iommu.c | 3 +++ drivers/iommu/rockchip-iommu.c | 9 +-------- include/linux/iommu.h | 3 +++ 3 files changed, 7 insertions(+), 8 deletions(-)
I will later convert the VT-d driver to use iommu_ops->identity_domain. Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
