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

Most active threads (last 7 days)

• WARM3d [PATCH 0/8] iommu/qcom: Misc Fixes
  2026-06-23 12:21 · 8 replies in 7d · Mukesh Ojha <hidden>
• COOLING4d [PATCH] iommu/qcom: Remove sysfs device on probe failure path
  2026-06-23 07:13 · 0 replies in 7d · Haoxiang Li <hidden>
• WARM2d [PATCH 0/8] SM8450 QoL changes
  2026-06-23 00:56 · 1 reply in 7d · Esteban Urrutia via B4 Relay <devnull+esteuwu.proton.me@kernel.org>
• COOLING5d [PATCH] iommu/arm-smmu-v3: Disable PRI when no priq IRQ is available
  2026-06-22 16:18 · 0 replies in 7d · Breno Leitao <leitao@debian.org>

Active reviewers (last 30 days)

• Shiqiang Zhang <hidden>
  16 attestations (16 Acked-by) · last on 2026-06-03
• Simon Guo <hidden>
  16 attestations (16 Acked-by) · last on 2026-06-03
• Nicolin Chen <hidden>
  12 attestations (9 Reviewed-by, 3 Suggested-by) · last on 2026-06-09
• Mostafa Saleh <smostafa@google.com>
  6 attestations (3 Reviewed-by, 3 Tested-by) · last on 2026-06-04
• Michael Kelley <hidden>
  3 attestations (3 Tested-by) · last on 2026-06-04
• Frank Li <Frank.Li@nxp.com>
  2 attestations (1 Acked-by, 1 Reviewed-by) · last on 2026-06-03
• Rob Herring (Arm) <robh@kernel.org>
  2 attestations (1 Reviewed-by, 1 Suggested-by) · last on 2026-06-03
• Daniel Mentz <hidden>
  2 attestations (2 Suggested-by) · last on 2026-06-01
• Vijayanand Jitta <hidden>
  1 attestation (1 Co-developed-by) · last on 2026-06-18
• kernel test robot <hidden>
  1 attestation (1 Reported-by) · last on 2026-06-15

Recent patches

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

• WARM3d [PATCH 8/8] iommu/qcom: Document why sec_ptbl allocated flag needs no locking
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 5/8] iommu/qcom: Publish pgtbl_ops before releasing init_mutex
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 4/8] iommu/qcom: Fix pgtbl_ops leak in qcom_iommu_init_domain() error path
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 7/8] iommu/qcom: Enable clocks before hardware access in qcom_iommu_ctx_probe()
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 3/8] iommu/qcom: Check pm_runtime_resume_and_get() return in probe
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 6/8] iommu/qcom: Add NULL ctx check in TLB invalidation paths
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 2/8] iommu/qcom: Fix missing pm_runtime_disable() in qcom_iommu_device_remove()
  2026-06-23 · Mukesh Ojha <hidden>
• WARM3d [PATCH 1/8] iommu/qcom: Fix inverted fault report check in qcom_iommu_fault()
  2026-06-23 · Mukesh Ojha <hidden>
• COOLING4d [PATCH] iommu/qcom: Remove sysfs device on probe failure path
  2026-06-23 · Haoxiang Li <hidden>
• WARM2d [PATCH 5/8] iommu/arm-smmu-qcom: Add SM8450 MDSS compatible
  2026-06-23 · Esteban Urrutia via B4 Relay <devnull+esteuwu.proton.me@kernel.org>
• COOLING5d [PATCH] iommu/arm-smmu-v3: Disable PRI when no priq IRQ is available
  2026-06-22 · Breno Leitao <leitao@debian.org>
• WARM2d [PATCH] iommu/io-pgtable-arm: Add support for contiguous hint bit
  2026-06-18 · Vijayanand Jitta <hidden>
• COOLING9d [PATCH] iommu/arm-smmu-v3: Fix VCMDQ indexing in tegra241_vintf0_handle_error
  2026-06-18 · lirongqing <hidden>
• COOLING8d [PATCH] iommu/arm-smmu-v3: Declare eats_s1chk and eats_trans as host-endian u64
  2026-06-15 · Nicolin Chen <hidden>
• COOLING11d [PATCH v2 3/3] dt-bindings: arm-smmu: Document GPU SMMU for Shikra SoC
  2026-06-14 · Akhil P Oommen <akhilpo@oss.qualcomm.com>
• WARM2d [PATCH] iommu/arm-smmu-v3: Add tracepoint for EVTQ events
  2026-06-13 · Chen Jun <hidden>
• COLD15d [PATCH v2 2/2] iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown
  2026-06-11 · Shameer Kolothum <skolothumtho@nvidia.com>
• COLD15d [PATCH v2 1/2] iommu/arm-smmu-v3: Manage teardown with devm
  2026-06-11 · Shameer Kolothum <skolothumtho@nvidia.com>
• COOLING10d [PATCH v4 1/3] iommu/arm-smmu-v3: Factor out CMDQ batch force-sync conditions
  2026-06-09 · Ashish Mhetre <hidden>
• COOLING10d [PATCH v4 3/3] iommu/arm-smmu-v3: Issue CFGI/TLBI twice on Tegra264
  2026-06-09 · Ashish Mhetre <hidden>
• COOLING10d [PATCH v4 2/3] iommu/arm-smmu-v3: Detect Tegra264 erratum
  2026-06-09 · Ashish Mhetre <hidden>
• COLD22d REVIEWED: 3 (3M) [PATCH 17/17] iommu/rockchip: disable fetch dte time limit
  2026-06-05 · Sven Püschel <hidden>
• COLD15d Re: [RFC PATCH v3 6/9] iommu/rockchip: Clear AUTO_GATING bit 1 on the RK356x v1 IOMMU
  2026-06-05 · Chaoyi Chen <hidden>
• COLD15d [RFC PATCH v3 6/9] iommu/rockchip: Clear AUTO_GATING bit 1 on the RK356x v1 IOMMU
  2026-06-04 · Midgy BALON <hidden>
• COOLING5d REVIEWED: 2 (1M) [PATCH v6 15/20] iommu/dma: Check atomic pool allocation result directly
  2026-06-04 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• COOLING5d REVIEWED: 2 (1M) [PATCH v6 05/20] dma: swiotlb: pass mapping attributes by reference
  2026-06-04 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• COOLING5d REVIEWED: 4 (2M) [PATCH v6 04/20] dma-pool: track decrypted atomic pools and select them via attrs
  2026-06-04 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• COOLING12d [PATCH v1 3/4] iommu: Avoid copying the user array twice in the full-array copy helper
  2026-06-03 · Nicolin Chen <hidden>
• COOLING12d [PATCH v1 4/4] iommu/arm-smmu-v3: Process vIOMMU invalidations in batches
  2026-06-03 · Nicolin Chen <hidden>
• COOLING12d [PATCH v1 1/4] iommufd: Set upper bounds on cache invalidation entry_num and entry_len
  2026-06-03 · Nicolin Chen <hidden>

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.

• STALE155d REVIEWED: 3 (3M) [PATCH rc v7 3/4] iommu/arm-smmu-v3: Mark EATS_TRANS safe when computing the update sequence
  2026-01-15 · Nicolin Chen <hidden> · 1 Reviewed-by
• STALE155d REVIEWED: 5 (5M) [PATCH rc v7 4/4] iommu/arm-smmu-v3-test: Add nested s1bypass/s1dssbypass coverage
  2026-01-15 · Nicolin Chen <hidden> · 3 Reviewed-by
• STALE100d REVIEWED: 6 (6M) [PATCH v13 8/8] iommu/arm-smmu-v3: Perform per-domain invalidations using arm_smmu_invs
  2026-03-17 · Nicolin Chen <hidden> · 1 Reviewed-by
• COLD39d REVIEWED: 2 (0M) [PATCH v2] iommu/arm-smmu-qcom: Fix fastrpc compatible string in ACTLR client match table
  2026-04-23 · <hidden> · 2 Reviewed-by
• COLD39d REVIEWED: 7 (6M) [PATCH v3] iommu: arm-smmu-qcom: Ensure smmu is powered up in set_ttbr0_cfg
  2026-05-07 · Anna Maniscalco <hidden> · 2 Reviewed-by
• COLD39d REVIEWED: 4 (4M) [PATCH v2 8/9] iommu/arm-smmu-v3: Directly encode CMDQ_OP_SYNC
  2026-05-13 · Jason Gunthorpe <jgg@nvidia.com> · 2 Reviewed-by, 2 Tested-by
• COLD39d REVIEWED: 4 (4M) [PATCH v2 4/9] iommu/arm-smmu-v3: Convert arm_smmu_cmdq_batch cmds to struct arm_smmu_cmd
  2026-05-13 · Jason Gunthorpe <jgg@nvidia.com> · 2 Reviewed-by, 2 Tested-by
• COLD38d REVIEWED: 2 (2M) [PATCH rc v6 5/7] iommu/arm-smmu-v3: Retain CR0_SMMUEN during kdump device reset
  2026-05-20 · Nicolin Chen <hidden> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 8 (8M) [PATCH rc v6 7/7] iommu/arm-smmu-v3: Detect ARM_SMMU_OPT_KDUMP_ADOPT in probe()
  2026-05-20 · Nicolin Chen <hidden> · 2 Reviewed-by
• COLD30d REVIEWED: 21 (19M) [PATCH v6 3/3] iommu/arm-smmu-v3: Allow ATS to be always on
  2026-05-21 · Nicolin Chen <hidden> · 4 Reviewed-by, 1 Acked-by, 1 Tested-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.

• STALE202d [PATCH rc v1 2/4] iommu/arm-smmu-v3: Ignore STE MEV when computing the update sequence
  2025-12-06 · Nicolin Chen <hidden>
• STALE172d [PATCH v10 3/7] iommu: Add verisilicon IOMMU driver
  2025-12-15 · Benjamin Gaignard <benjamin.gaignard@collabora.com>
• STALE161d [PATCH v1 8/9] iommu/arm-smmu-v3: Remove ASID/VMID from arm_smmu_domain
  2025-12-18 · Nicolin Chen <hidden>
• STALE161d [PATCH v1 4/9] iommu/arm-smmu-v3: Use alloc_id/free_id ops in arm_smmu_invs_merge/unref
  2025-12-18 · Nicolin Chen <hidden>
• STALE161d [PATCH v1 5/9] iommu/arm-smmu-v3: Install to CD/STE the ASID/VMID stored in the master
  2025-12-18 · Nicolin Chen <hidden>
• STALE161d [PATCH v1 6/9] iommu/arm-smmu-v3: Use dummy ASID/VMID in arm_smmu_master_build_invs()
  2025-12-18 · Nicolin Chen <hidden>
• STALE161d [PATCH v1 1/9] iommu/arm-smmu-v3: Pass in ssid to arm_smmu_make_s1_cd()
  2025-12-18 · Nicolin Chen <hidden>
• STALE161d [PATCH v1 9/9] iommu/arm-smmu-v3: Allow sharing domain across SMMUs
  2025-12-18 · Nicolin Chen <hidden>
• STALE161d [PATCH v1 7/9] iommu/arm-smmu-v3: Remove free_fn argument from arm_smmu_invs_unref()
  2025-12-18 · Nicolin Chen <hidden>
• STALE151d [PATCH v2 09/10] iommu/arm-smmu-v3: Remove ASID/VMID from arm_smmu_domain
  2026-01-22 · Nicolin Chen <hidden>