{"id":2231887,"url":"http://patchwork.ozlabs.org/api/1.2/covers/2231887/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/cover/0-v1-b7dc0a0d4aa0+3723d-smmu_no_cmdq_ent_jgg@nvidia.com/","project":{"id":21,"url":"http://patchwork.ozlabs.org/api/1.2/projects/21/?format=json","name":"Linux Tegra Development","link_name":"linux-tegra","list_id":"linux-tegra.vger.kernel.org","list_email":"linux-tegra@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<0-v1-b7dc0a0d4aa0+3723d-smmu_no_cmdq_ent_jgg@nvidia.com>","list_archive_url":null,"date":"2026-05-01T14:29:09","name":"[0/9] Remove SMMUv3 struct arm_smmu_cmdq_ent","submitter":{"id":79424,"url":"http://patchwork.ozlabs.org/api/1.2/people/79424/?format=json","name":"Jason Gunthorpe","email":"jgg@nvidia.com"},"mbox":"http://patchwork.ozlabs.org/project/linux-tegra/cover/0-v1-b7dc0a0d4aa0+3723d-smmu_no_cmdq_ent_jgg@nvidia.com/mbox/","series":[{"id":502465,"url":"http://patchwork.ozlabs.org/api/1.2/series/502465/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/list/?series=502465","date":"2026-05-01T14:29:09","name":"Remove SMMUv3 struct arm_smmu_cmdq_ent","version":1,"mbox":"http://patchwork.ozlabs.org/series/502465/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2231887/comments/","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=hLbSTdzC;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) 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struct arm_smmu_cmdq_ent","Date":"Fri, 1 May 2026 11:29:09 -0300","Message-ID":"<0-v1-b7dc0a0d4aa0+3723d-smmu_no_cmdq_ent_jgg@nvidia.com>","Content-Transfer-Encoding":"8bit","Content-Type":"text/plain","X-ClientProxiedBy":"BL1P221CA0012.NAMP221.PROD.OUTLOOK.COM\n (2603:10b6:208:2c5::6) To LV8PR12MB9620.namprd12.prod.outlook.com\n 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","X-OriginatorOrg":"Nvidia.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n 891723f5-d8fe-4c15-7a73-08dea78e07b4","X-MS-Exchange-CrossTenant-AuthSource":"LV8PR12MB9620.namprd12.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"01 May 2026 14:29:19.1804\n (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"43083d15-7273-40c1-b7db-39efd9ccc17a","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n Gl1zDZ+H4uzvgJknV/x7lG/BcEqXxX4tS+Jj1uqoXDy7nvN8RrFJOFFAGfgbuOKr","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"LV3PR12MB9216"},"content":"[ This is part of the patch pile to move SMMUv3 over to the generic page\ntable:\n1) Introduction of new gather items and RISCV usage\n https://patch.msgid.link/r/0-v1-54e7264d71b4+17cc3-iommu_riscv_inv_jgg@nvidia.com\n2) Remove SMMUv3 struct arm_smmu_cmdq_ent\n3) Organize the SMMUv3 invalidation flow so iommupt can use it\n4) Use the generic iommu page table for SMMUv3\n\nThe whole branch is here:\n https://github.com/jgunthorpe/linux/commits/iommu_pt_arm64/\n]\n\nThe invalidation logic has this multi-step process where it first\nwrites the command into a 32 byte struct arm_smmu_cmdq_ent, then it\ncalls a function which converts it into a 16 byte HW struct, and\nsometimes it then edits the HW struct a little bit before passing it\noff to the batch or submission functions.\n\nInstead just generate the HW struct directly by moving the FIELD_PREP\nblocks out of the big case statement and into helper functions. Call the\nright function in all the places that were building arm_smmu_cmdq_ent.\n\nAdd a type for the CMDQ entry similar to the STE/CD types that wraps the\ntwo u64s for clarity and use it everywhere.\n\nThis is intended to have no functional change. It makes the following\npatches work better and removes a bunch of LOC. I've run several AI tools\nwith instruction to look for functional changes, which did find one subtle\nmistake in PRI response.\n\nThe removal of arm_smmu_cmdq_build_cmd() also achieves what Mostafa is\ndoing in the pkvm series by making the command formation entirely header\nbased with the arm_smmu_make_cmd_*() mini inlines.\n\nThis series has no dependencies. Several people have already tested this\non various ARM systems along with the full iommupt conversion.\n\nJason Gunthorpe (9):\n iommu/arm-smmu-v3: Add struct arm_smmu_cmd to represent the HW format\n command\n iommu/arm-smmu-v3: Use the HW arm_smmu_cmd in cmdq selection functions\n iommu/arm-smmu-v3: Use the HW arm_smmu_cmd in cmdq submission\n functions\n iommu/arm-smmu-v3: Convert arm_smmu_cmdq_batch cmds to struct\n arm_smmu_cmd\n iommu/arm-smmu-v3: Remove CMDQ_OP_CFGI_CD_ALL from\n arm_smmu_cmdq_build_cmd()\n iommu/arm-smmu-v3: Directly encode simple commands\n iommu/arm-smmu-v3: Directly encode CMDQ_OP_ATC_INV\n iommu/arm-smmu-v3: Directly encode CMDQ_OP_SYNC\n iommu/arm-smmu-v3: Directly encode TLBI commands\n\n .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 24 +-\n drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 475 +++++++-----------\n drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 248 +++++----\n .../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 16 +-\n 4 files changed, 350 insertions(+), 413 deletions(-)\n\n\nbase-commit: 1338d1bd1ea27bfe2cd1c4494547d409016a6644"}