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Mon, 21 Oct 2024 06:40:50 -0700 From: Dragos Tatulea To: "Michael S . Tsirkin" , , Si-Wei Liu CC: Dragos Tatulea , Jason Wang , Eugenio Perez Martin , , , Gal Pressman , Parav Pandit , Xuan Zhuo , Subject: [PATCH vhost 1/2] vdpa/mlx5: Fix PA offset with unaligned starting iotlb map Date: Mon, 21 Oct 2024 16:40:39 +0300 Message-ID: <20241021134040.975221-2-dtatulea@nvidia.com> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20241021134040.975221-1-dtatulea@nvidia.com> References: <20241021134040.975221-1-dtatulea@nvidia.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044AA:EE_|MW4PR12MB7263:EE_ X-MS-Office365-Filtering-Correlation-Id: 66cacbac-bf91-4b5b-a6f3-08dcf1d606c4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(376014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Oct 2024 13:41:11.6583 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 66cacbac-bf91-4b5b-a6f3-08dcf1d606c4 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044AA.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7263 From: Si-Wei Liu When calculating the physical address range based on the iotlb and mr [start,end) ranges, the offset of mr->start relative to map->start is not taken into account. This leads to some incorrect and duplicate mappings. For the case when mr->start < map->start the code is already correct: the range in [mr->start, map->start) was handled by a different iteration. Fixes: 94abbccdf291 ("vdpa/mlx5: Add shared memory registration code") Cc: stable@vger.kernel.org Signed-off-by: Si-Wei Liu Signed-off-by: Dragos Tatulea --- drivers/vdpa/mlx5/core/mr.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c index 2dd21e0b399e..7d0c83b5b071 100644 --- a/drivers/vdpa/mlx5/core/mr.c +++ b/drivers/vdpa/mlx5/core/mr.c @@ -373,7 +373,7 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr struct page *pg; unsigned int nsg; int sglen; - u64 pa; + u64 pa, offset; u64 paend; struct scatterlist *sg; struct device *dma = mvdev->vdev.dma_dev; @@ -396,8 +396,10 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr sg = mr->sg_head.sgl; for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1); map; map = vhost_iotlb_itree_next(map, mr->start, mr->end - 1)) { - paend = map->addr + maplen(map, mr); - for (pa = map->addr; pa < paend; 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Tsirkin" , , Si-Wei Liu CC: Dragos Tatulea , Jason Wang , Eugenio Perez Martin , , , Gal Pressman , Parav Pandit , Xuan Zhuo Subject: [PATCH vhost 2/2] vdpa/mlx5: Fix suboptimal range on iotlb iteration Date: Mon, 21 Oct 2024 16:40:40 +0300 Message-ID: <20241021134040.975221-3-dtatulea@nvidia.com> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20241021134040.975221-1-dtatulea@nvidia.com> References: <20241021134040.975221-1-dtatulea@nvidia.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS3PEPF0000C37E:EE_|DS7PR12MB5792:EE_ X-MS-Office365-Filtering-Correlation-Id: 4122f495-1e9a-452f-1586-08dcf1d608da X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(36860700013)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Oct 2024 13:41:15.2010 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4122f495-1e9a-452f-1586-08dcf1d608da X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF0000C37E.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB5792 From: Si-Wei Liu The starting iova address to iterate iotlb map entry within a range was set to an irrelevant value when passing to the itree_next() iterator, although luckily it doesn't affect the outcome of finding out the granule of the smallest iotlb map size. Fix the code to make it consistent with the following for-loop. Fixes: 94abbccdf291 ("vdpa/mlx5: Add shared memory registration code") Signed-off-by: Si-Wei Liu Signed-off-by: Dragos Tatulea --- drivers/vdpa/mlx5/core/mr.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c index 7d0c83b5b071..8455f08f5d40 100644 --- a/drivers/vdpa/mlx5/core/mr.c +++ b/drivers/vdpa/mlx5/core/mr.c @@ -368,7 +368,6 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr unsigned long lgcd = 0; int log_entity_size; unsigned long size; - u64 start = 0; int err; struct page *pg; unsigned int nsg; @@ -379,10 +378,9 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr struct device *dma = mvdev->vdev.dma_dev; for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1); - map; map = vhost_iotlb_itree_next(map, start, mr->end - 1)) { + map; map = vhost_iotlb_itree_next(map, mr->start, mr->end - 1)) { size = maplen(map, mr); lgcd = gcd(lgcd, size); - start += size; } log_entity_size = ilog2(lgcd);