laptop-kernel/drivers/iommu, branch master

iommupt/kunit: Use if_changed_rule for the kunit

2026-10-14T13:42:12Z

Use if_changed_rule so rule_cc_o_c runs cmd_save_c_flags for the kunit objects. Without the saved flags CONFIG_LTO_CLANG_THIN_DIST runs the ThinLTO backend with no --target and generates x86_64 code from arm64 bitcode. Fixes: 1dd4187f53c3 ("iommupt: Add a kunit test for Generic Page Table") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202610110841.120JzAJG-lkp@intel.com/ Assisted-by: LLM Signed-off-by: Jason Gunthorpe Signed-off-by: Joerg Roedel

Revert "iommu/amd: Remove redundant check in irq_remapping_select()"

2026-10-14T13:40:36Z

This reverts commit 5e1afd4ea1d6a9bbaecf3e28707dac9c8b56bd45. This commit caused a regression with GPU devices on some platforms. Revert it for now. Signed-off-by: Joerg Roedel

Merge tag 'dma-mapping-7.3-2026-10-09' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux

2026-10-09T22:49:55Z

Pull dma-mapping fixes from Marek Szyprowski: "Two more fixes for the corner cases in the DMA-mapping SWIOTLB code (Peng Fan and Marek Szyprowski)" * tag 'dma-mapping-7.3-2026-10-09' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: swiotlb: fix default_swiotlb_limit() for non-growable default pool iommu/dma: skip swiotlb bounce for DMA_ATTR_MMIO in iommu_dma_map_phys

iommu/dma: skip swiotlb bounce for DMA_ATTR_MMIO in iommu_dma_map_phys

2026-09-23T07:56:10Z

MMIO resources mapped via dma_map_resource() carry DMA_ATTR_MMIO. These never need swiotlb bounce buffering, but the current code enters the swiotlb path when the physical address is not page-aligned, then rejects the mapping because MMIO cannot be bounced. Move the DMA_ATTR_MMIO check before the swiotlb block so the entire bounce path is skipped for MMIO, falling through directly to __iommu_dma_map() which creates the IOVA mapping. Fixes: f9374de14c0e8 ("iommu/dma: implement DMA_ATTR_MMIO for iommu_dma_(un)map_phys()") Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Peng Fan Acked-by: Robin Murphy Link: https://lore.kernel.org/r/20260916-iommu-dma-fix-v1-1-a59a0c45ec5b@nxp.com Signed-off-by: Marek Szyprowski

iommu/amd: Remove unused macro

2026-09-11T15:27:22Z

Remove unsed device range capability related macros. No functional changes. Signed-off-by: Vasant Hegde Signed-off-by: Joerg Roedel

iommu/amd: Remove redundant checks from interrupt handler path

2026-09-11T15:27:22Z

PPR and GAlog interrupt is enabled only if buffer is allocated. (See amd_iommu_enable_ppr_log() and iommu_ga_log_enable()). The duplicate check in interrupt hanlder path is unnecessary and can be removed. No functional changes. Signed-off-by: Vasant Hegde Signed-off-by: Joerg Roedel

iommu/amd: Remove redundant check in irq_remapping_select()

2026-09-11T15:27:21Z

The amd_iommu_irq_remap flag is already validated during irq remapping domain creation (before calling amd_iommu_create_irq_domain()). The duplicate check in irq_remapping_select() is unnecessary and can be removed. Additionally, mark amd_iommu_irq_remap as static. No functional changes. Signed-off-by: Vasant Hegde Signed-off-by: Joerg Roedel

iommu/amd: Make iommu_sva_set_dev_pasid as static

2026-09-11T15:27:21Z

Its used inside pasid.c only. No functional changes. Signed-off-by: Vasant Hegde Signed-off-by: Joerg Roedel

iommu/amd: Fix ineffective error check in nested domain allocation

2026-09-07T13:03:01Z

amd_iommu_pdom_id_alloc() returns an int: a domain ID on success, or the negative errno from ida_alloc_range() when the ID space is exhausted or memory is short. amd_iommu_alloc_domain_nested() stores that return value in gdom_info->hdom_id, which is a u32, and only then tests it: gdom_info->hdom_id = amd_iommu_pdom_id_alloc(); if (gdom_info->hdom_id <= 0) { The assignment discards the sign, so -ENOSPC becomes 0xffffffe4 and the test never fires. The nested domain is then set up with a host domain ID that was never allocated, instead of the allocation failing with -ENOSPC. Keep the value in an int, test it there, and store it only once it is known to be valid, which is what the other amd_iommu_pdom_id_alloc() callers already do. Fixes: 757d2b1fdf5b ("iommu/amd: Introduce gDomID-to-hDomID Mapping and handle parent domain invalidation") Signed-off-by: Hemanth Selam Reviewed-by: Vasant Hegde Signed-off-by: Joerg Roedel

iommu/amd: Fix premature break in init_iommu_one() again

2026-09-07T12:38:58Z

Commit 283d245468a2 ("iommu/amd: Fix premature break in init_iommu_one()") unintentionally broke older platforms - such as the ASRockRack B550D4-4L - where the BIOS advertises incorrect IOMMU features. Move the HATDis check ahead of the GASup check, and re-introduce the break inside the GASup check to restore correct behavior on affected platforms. This is a short-term fix to resolve the regression. Longer term, we should rework how EFRs are tracked and prioritize the MMIO-advertised EFR over the one reported via IVRS. That requires more extensive changes and will be addressed separately. Fixes: 283d245468a2 ("iommu/amd: Fix premature break in init_iommu_one()") Reported-by: Andreas Juch Closes: https://lore.kernel.org/linux-iommu/07b2d390-f7a0-47e2-bc2c-eb0853acf52e@juch.cc/ Tested-by: Andreas Juch Signed-off-by: Vasant Hegde Signed-off-by: Joerg Roedel