Now, iommufd implements its own sw_msi function that does not touch the domain->iova_cookie but domain->iommufd_hwpt, as a domain owner pointer. Isolate the iova_cookie from iommufd by putting it into the union where the iommufd_hwpt is located. This requires a set of preparations to move iommu_put_dma_cookie() out of the common path of iommu_domain_free() that iommufd still calls. Make thing cleaner that any caller of iommu_get_dma/msi_cookie() should explicitly call the pairing iommu_put_dma/msi_cookie(). This is a clean-up series for the sw_msi Part-1 core series, prior to the Part-2/3 series. It's on github: https://github.com/nicolinc/iommufd/commits/iommufd_msi_cleanup-v1 Thanks Nicolin Nicolin Chen (4): iommu: Define iommu_get/put_msi_cookie() under CONFIG_IRQ_MSI_IOMMU iommu: Add iommu_default_domain_free helper iommu: Request iova_cookie owner to put cookie explicitly iommu: Turn iova_cookie to dma-iommu private pointer include/linux/iommu.h | 12 ++++++++---- drivers/iommu/dma-iommu.c | 12 ++++++++++++ drivers/iommu/iommu.c | 13 +++++++++---- drivers/vfio/vfio_iommu_type1.c | 4 ++++ 4 files changed, 33 insertions(+), 8 deletions(-) base-commit: 598749522d4254afb33b8a6c1bea614a95896868 -- 2.43.0
