iommu subsystem · Maintained

Maintainers

• M Joerg Roedel <joro@8bytes.org>
• M Will Deacon <will@kernel.org>
• R Robin Murphy <robin.murphy@arm.com>

Paths

• F Documentation/devicetree/bindings/iommu/
• F drivers/iommu/
• F include/linux/iommu.h
• F include/linux/iova.h
• F include/linux/of_iommu.h
• F rust/kernel/iommu/

Last 30 days

Recent patches

Most-recent 30 patches in this subsystem on linux-doc (capped at 30), ordered by date desc.

• COLD25d [PATCH 05/15] iommu: Add QDA compute context bank bus to iommu_buses
  2026-05-19 · Ekansh Gupta via B4 Relay <devnull+ekansh.gupta.oss.qualcomm.com@kernel.org>
• COLD48d [PATCH v16 32/38] x86/slaunch: Secure Launch kernel late boot initialization
  2026-05-15 · Ross Philipson <hidden>
• STALE64d [PATCH v4 08/11] PCI: liveupdate: Require preserved devices are in immutable singleton IOMMU groups
  2026-04-23 · David Matlack <dmatlack@google.com>
• STALE99d [PATCH] iommu/amd: add amd_iommu=relax_unity option for VFIO passthrough
  2026-03-28 · Christos Longros <hidden>
• STALE109d LANDED [PATCH v3 6/8] iommu/dma: add support for DMA_ATTR_REQUIRE_COHERENT attribute
  2026-03-16 · Leon Romanovsky <leon@kernel.org>
• STALE117d [PATCH v2 6/8] iommu/dma: add support for DMA_ATTR_REQUIRE_COHERENT attribute
  2026-03-11 · Leon Romanovsky <leon@kernel.org>
• STALE96d [PATCH RFC 04/18] accel/qda: Add built-in compute CB bus for QDA and integrate with IOMMU
  2026-02-23 · Ekansh Gupta <hidden>
• STALE167d [PATCH v2 2/2] iommu: debug-pagealloc: Use page_ext_get_from_phys()
  2026-01-20 · Mostafa Saleh <smostafa@google.com>
• STALE169d [PATCH 2/2] iommu: debug-pagealloc: Use page_ext_get_phys()
  2026-01-19 · Mostafa Saleh <smostafa@google.com>
• STALE165d [RFC PATCH v4 29/38] iommu: ipmmu-vmsa: Add support for reserved regions
  2026-01-18 · Koichiro Den <hidden>
• STALE165d [RFC PATCH v4 28/38] iommu: ipmmu-vmsa: Add PCIe ch0 to devices_allowlist
  2026-01-18 · Koichiro Den <hidden>
• STALE169d REVIEWED: 3 (2M) [PATCH v7 5/5] iommu: debug-pagealloc: Check mapped/unmapped kernel memory
  2026-01-14 · Mostafa Saleh <smostafa@google.com>
• STALE169d [PATCH v7 4/5] iommu: debug-pagealloc: Track IOMMU pages
  2026-01-14 · Mostafa Saleh <smostafa@google.com>
• STALE169d REVIEWED: 3 (2M) [PATCH v7 3/5] iommu: Add calls for IOMMU_DEBUG_PAGEALLOC
  2026-01-14 · Mostafa Saleh <smostafa@google.com>
• STALE169d REVIEWED: 17 (17M) [PATCH v7 2/5] iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC
  2026-01-14 · Mostafa Saleh <smostafa@google.com>
• STALE174d REVIEWED: 2 (1M) [PATCH v6 4/4] iommu: debug-pagealloc: Check mapped/unmapped kernel memory
  2026-01-09 · Mostafa Saleh <smostafa@google.com>
• STALE174d REVIEWED: 2 (1M) [PATCH v6 3/4] iommu: debug-pagealloc: Track IOMMU pages
  2026-01-09 · Mostafa Saleh <smostafa@google.com>
• STALE174d REVIEWED: 3 (2M) [PATCH v6 2/4] iommu: Add calls for IOMMU_DEBUG_PAGEALLOC
  2026-01-09 · Mostafa Saleh <smostafa@google.com>
• STALE174d REVIEWED: 17 (17M) [PATCH v6 1/4] iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC
  2026-01-09 · Mostafa Saleh <smostafa@google.com>
• STALE179d REVIEWED: 1 (1M) [PATCH v5 3/4] iommu: debug-pagealloc: Track IOMMU pages
  2026-01-06 · Mostafa Saleh <smostafa@google.com>
• STALE179d REVIEWED: 1 (1M) [PATCH v5 4/4] iommu: debug-pagealloc: Check mapped/unmapped kernel memory
  2026-01-06 · Mostafa Saleh <smostafa@google.com>
• STALE179d REVIEWED: 1 (1M) [PATCH v5 1/4] iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC
  2026-01-06 · Mostafa Saleh <smostafa@google.com>
• STALE179d [PATCH v5 2/4] iommu: Add calls for IOMMU_DEBUG_PAGEALLOC
  2026-01-06 · Mostafa Saleh <smostafa@google.com>
• STALE100d [PATCH v15 23/28] x86: Secure Launch kernel late boot stub
  2025-12-15 · Ross Philipson <hidden>
• STALE182d [PATCH v4 4/4] iommu: debug-pagealloc: Check mapped/unmapped kernel memory
  2025-12-11 · Mostafa Saleh <smostafa@google.com>
• STALE182d [PATCH v4 3/4] iommu: debug-pagealloc: Track IOMMU pages
  2025-12-11 · Mostafa Saleh <smostafa@google.com>
• STALE182d [PATCH v4 2/4] iommu: Add calls for IOMMU_DEBUG_PAGEALLOC
  2025-12-11 · Mostafa Saleh <smostafa@google.com>
• STALE182d [PATCH v4 1/4] iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC
  2025-12-11 · Mostafa Saleh <smostafa@google.com>
• STALE211d Re: [PATCH v3 1/4] drivers/iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC
  2025-11-25 · Baolu Lu <baolu.lu@linux.intel.com>
• STALE211d [PATCH v3 4/4] drivers/iommu-debug-pagealloc: Check mapped/unmapped kernel memory
  2025-11-24 · Mostafa Saleh <smostafa@google.com>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE179d REVIEWED: 1 (1M) [PATCH v5 3/4] iommu: debug-pagealloc: Track IOMMU pages
  2026-01-06 · Mostafa Saleh <smostafa@google.com> · 1 Reviewed-by
• STALE179d REVIEWED: 1 (1M) [PATCH v5 4/4] iommu: debug-pagealloc: Check mapped/unmapped kernel memory
  2026-01-06 · Mostafa Saleh <smostafa@google.com> · 1 Reviewed-by
• STALE169d REVIEWED: 3 (2M) [PATCH v7 5/5] iommu: debug-pagealloc: Check mapped/unmapped kernel memory
  2026-01-14 · Mostafa Saleh <smostafa@google.com> · 3 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE100d [PATCH v15 23/28] x86: Secure Launch kernel late boot stub
  2025-12-15 · Ross Philipson <hidden>
• STALE169d [PATCH v7 4/5] iommu: debug-pagealloc: Track IOMMU pages
  2026-01-14 · Mostafa Saleh <smostafa@google.com>
• STALE165d [RFC PATCH v4 28/38] iommu: ipmmu-vmsa: Add PCIe ch0 to devices_allowlist
  2026-01-18 · Koichiro Den <hidden>
• STALE165d [RFC PATCH v4 29/38] iommu: ipmmu-vmsa: Add support for reserved regions
  2026-01-18 · Koichiro Den <hidden>
• STALE169d [PATCH 2/2] iommu: debug-pagealloc: Use page_ext_get_phys()
  2026-01-19 · Mostafa Saleh <smostafa@google.com>
• STALE167d [PATCH v2 2/2] iommu: debug-pagealloc: Use page_ext_get_from_phys()
  2026-01-20 · Mostafa Saleh <smostafa@google.com>
• STALE117d [PATCH v2 6/8] iommu/dma: add support for DMA_ATTR_REQUIRE_COHERENT attribute
  2026-03-11 · Leon Romanovsky <leon@kernel.org>
• STALE109d LANDED [PATCH v3 6/8] iommu/dma: add support for DMA_ATTR_REQUIRE_COHERENT attribute
  2026-03-16 · Leon Romanovsky <leon@kernel.org>