[PATCH v2 7/7] iommu: Turn iova_cookie to dma-iommu private pointer
From: Nicolin Chen <hidden>
Date: 2025-02-20 01:32:55
Also in:
linux-iommu, linux-kselftest, linux-patches, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
Now that iommufd does not rely on dma-iommu.c for any purpose. We can combine the dma-iommu.c iova_cookie and the iommufd_hwpt under the same union. This union is effectively 'owner data' and can be used by the entity that allocated the domain. Note that legacy vfio type1 flows continue to use dma-iommu.c for sw_msi and still need iova_cookie. Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Nicolin Chen <redacted> --- include/linux/iommu.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index e93d2e918599..99dd72998cb7 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h@@ -216,7 +216,6 @@ struct iommu_domain { const struct iommu_ops *owner; /* Whose domain_alloc we came from */ unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */ struct iommu_domain_geometry geometry; - struct iommu_dma_cookie *iova_cookie; int (*iopf_handler)(struct iopf_group *group); #if IS_ENABLED(CONFIG_IRQ_MSI_IOMMU)
@@ -225,6 +224,7 @@ struct iommu_domain { #endif union { /* Pointer usable by owner of the domain */ + struct iommu_dma_cookie *iova_cookie; /* dma-iommu */ struct iommufd_hw_pagetable *iommufd_hwpt; /* iommufd */ }; union { /* Fault handler */
--
2.43.0