On 2021/1/19 19:16, Lianbo Jiang wrote:
This patchset is to fix the failure of deferred attach for iommu attach device, it includes the following two patches:[1] [PATCH 1/2] dma-iommu: use static-key to minimize the impact in the fast-path This is a prepared patch for the second one, move out the is_kdump_kernel() check from iommu_dma_deferred_attach() to iommu_dma_init(), and use the static-key in the fast-path to minimize the impact in the normal case. [2] [PATCH 2/2] iommu: use the __iommu_attach_device() directly for deferred attach Move the handling currently in iommu_dma_deferred_attach() into the iommu core code so that it can call the __iommu_attach_device() directly instead of the iommu_attach_device(). The external interface iommu_attach_device() is not suitable for handling this situation. Changes since v1: [1] use the __iommu_attach_device() directly for deferred attach [2] use static-key to minimize the impact in the fast-path Lianbo Jiang (2): dma-iommu: use static-key to minimize the impact in the fast-path iommu: use the __iommu_attach_device() directly for deferred attach drivers/iommu/dma-iommu.c | 29 +++++++++++------------------ drivers/iommu/iommu.c | 12 ++++++++++++ include/linux/iommu.h | 2 ++ 3 files changed, 25 insertions(+), 18 deletions(-)
Good fix and improvement. For the patches in this series: Reviewed-by: Lu Baolu <baolu...@linux.intel.com> Best regards, baolu _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
