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Mon, 23 Jan 2023 20:36:04 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::3cb3:2fce:5c8f:82ee]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::3cb3:2fce:5c8f:82ee%4]) with mapi id 15.20.6002.033; Mon, 23 Jan 2023 20:36:04 +0000 From: Jason Gunthorpe To: Lu Baolu , Joerg Roedel , Kevin Tian , Matthew Rosato , Robin Murphy Cc: Alex Williamson , ath10k@lists.infradead.org, ath11k@lists.infradead.org, Christian Borntraeger , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, linux-rdma@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, nouveau@lists.freedesktop.org, Niklas Schnelle , virtualization@lists.linux-foundation.org Subject: [PATCH v3 00/10] Let iommufd charge IOPTE allocations to the memory cgroup Date: Mon, 23 Jan 2023 16:35:53 -0400 Message-Id: <0-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com> X-ClientProxiedBy: BLAPR05CA0020.namprd05.prod.outlook.com (2603:10b6:208:36e::23) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|BL3PR12MB6571:EE_ X-MS-Office365-Filtering-Correlation-Id: 808b6e2a-c9d1-4ffd-852f-08dafd81729a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 808b6e2a-c9d1-4ffd-852f-08dafd81729a X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jan 2023 20:36:04.2777 (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: zHlL7iwdfLJOVwSWdoQkotYBVZTbCXUsK2C6oTuCQxNQ86RydNUUAETqqJ+VfKlL X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6571 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org iommufd follows the same design as KVM and uses memory cgroups to limit the amount of kernel memory a iommufd file descriptor can pin down. The various internal data structures already use GFP_KERNEL_ACCOUNT to charge its own memory. However, one of the biggest consumers of kernel memory is the IOPTEs stored under the iommu_domain and these allocations are not tracked. This series is the first step in fixing it. The iommu driver contract already includes a 'gfp' argument to the map_pages op, allowing iommufd to specify GFP_KERNEL_ACCOUNT and then having the driver allocate the IOPTE tables with that flag will capture a significant amount of the allocations. Update the iommu_map() API to pass in the GFP argument, and fix all call sites. Replace iommu_map_atomic(). Audit the "enterprise" iommu drivers to make sure they do the right thing. Intel and S390 ignore the GFP argument and always use GFP_ATOMIC. This is problematic for iommufd anyhow, so fix it. AMD and ARM SMMUv2/3 are already correct. A follow up series will be needed to capture the allocations made when the iommu_domain itself is allocated, which will complete the job. v3: - Leave a GFP_ATOMIC in "Add a gfp parameter to iommu_map_sg()" and move the conversion to gfp argument to "Use the gfp parameter in __iommu_dma_alloc_noncontiguous()" - Mask off the zone/policy flags from gfp before doing internal allocations and add a comment about Robin's note that this is to keep the buffer and internal seperate. v2: https://lore.kernel.org/r/0-v2-ce66f632bd0d+484-iommu_map_gfp_jgg@nvidia.com - Prohibit bad GFP flags in the iommu wrappers - Split out the new GFP_KERNEL usages into dedicated patches so it is easier to check. No code change after the full series v1: https://lore.kernel.org/r/0-v1-6e8b3997c46d+89e-iommu_map_gfp_jgg@nvidia.com Jason Gunthorpe (10): iommu: Add a gfp parameter to iommu_map() iommu: Remove iommu_map_atomic() iommu: Add a gfp parameter to iommu_map_sg() iommu/dma: Use the gfp parameter in __iommu_dma_alloc_noncontiguous() iommufd: Use GFP_KERNEL_ACCOUNT for iommu_map() iommu/intel: Add a gfp parameter to alloc_pgtable_page() iommu/intel: Support the gfp argument to the map_pages op iommu/intel: Use GFP_KERNEL in sleepable contexts iommu/s390: Push the gfp parameter to the kmem_cache_alloc()'s iommu/s390: Use GFP_KERNEL in sleepable contexts arch/arm/mm/dma-mapping.c | 11 ++-- arch/s390/include/asm/pci_dma.h | 5 +- arch/s390/pci/pci_dma.c | 31 ++++++----- .../drm/nouveau/nvkm/subdev/instmem/gk20a.c | 3 +- drivers/gpu/drm/tegra/drm.c | 2 +- drivers/gpu/host1x/cdma.c | 2 +- drivers/infiniband/hw/usnic/usnic_uiom.c | 4 +- drivers/iommu/dma-iommu.c | 18 +++++-- drivers/iommu/intel/iommu.c | 36 +++++++------ drivers/iommu/intel/iommu.h | 2 +- drivers/iommu/intel/pasid.c | 2 +- drivers/iommu/iommu.c | 53 +++++++------------ drivers/iommu/iommufd/pages.c | 6 ++- drivers/iommu/s390-iommu.c | 15 +++--- drivers/media/platform/qcom/venus/firmware.c | 2 +- drivers/net/ipa/ipa_mem.c | 6 ++- drivers/net/wireless/ath/ath10k/snoc.c | 2 +- drivers/net/wireless/ath/ath11k/ahb.c | 4 +- drivers/remoteproc/remoteproc_core.c | 5 +- drivers/vfio/vfio_iommu_type1.c | 9 ++-- drivers/vhost/vdpa.c | 2 +- include/linux/iommu.h | 31 +++-------- 22 files changed, 126 insertions(+), 125 deletions(-) base-commit: 5dc4c995db9eb45f6373a956eb1f69460e69e6d4