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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 04/10] iommu/dma: Use the gfp parameter in __iommu_dma_alloc_noncontiguous() Date: Mon, 23 Jan 2023 16:35:57 -0400 Message-Id: <4-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com> In-Reply-To: <0-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com> References: X-ClientProxiedBy: BL1PR13CA0173.namprd13.prod.outlook.com (2603:10b6:208:2bd::28) 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: aaf1246c-1cbe-4a82-852f-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: aaf1246c-1cbe-4a82-852f-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 20:36:04.3090 (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: 3fvE1MQyzDEKDl0nU0SwBUUq+NIL4nOoSFDIAxz9Kh7Q43tua747ln4DGjiyt2uC X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6571 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This function does an allocation of a buffer to return to the caller and then goes on to allocate some internal memory, eg the scatterlist and IOPTEs. Instead of hard wiring GFP_KERNEL and a wrong GFP_ATOMIC, continue to use the passed in gfp flags for all of the allocations. Clear the zone and policy bits that are only relevant for the buffer allocation before re-using them for internal allocations. Auditing says this is never called from an atomic context, so the GFP_ATOMIC is the incorrect flag. Reviewed-by: Kevin Tian Signed-off-by: Jason Gunthorpe --- drivers/iommu/dma-iommu.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 72cfa24503b8bc..c99e4bc55d8cb0 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -822,7 +822,14 @@ static struct page **__iommu_dma_alloc_noncontiguous(struct device *dev, if (!iova) goto out_free_pages; - if (sg_alloc_table_from_pages(sgt, pages, count, 0, size, GFP_KERNEL)) + /* + * Remove the zone/policy flags from the GFP - these are applied to the + * __iommu_dma_alloc_pages() but are not used for the supporting + * internal allocations that follow. + */ + gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM | __GFP_COMP); + + if (sg_alloc_table_from_pages(sgt, pages, count, 0, size, gfp)) goto out_free_iova; if (!(ioprot & IOMMU_CACHE)) { @@ -834,7 +841,7 @@ static struct page **__iommu_dma_alloc_noncontiguous(struct device *dev, } ret = iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, ioprot, - GFP_ATOMIC); + gfp); if (ret < 0 || ret < size) goto out_free_sg;