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Thu, 22 Sep 2022 01:54:37 -0700 Received: from Asurada-Nvidia.nvidia.com (10.127.8.11) by mail.nvidia.com (10.126.190.181) with Microsoft SMTP Server id 15.2.986.29 via Frontend Transport; Thu, 22 Sep 2022 01:54:35 -0700 From: Nicolin Chen To: , , , , , , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 5/6] iommu: Use EINVAL for incompatible device/domain in ->attach_dev Date: Thu, 22 Sep 2022 01:54:34 -0700 Message-ID: <9cfa41b3aceba02cacba33d86849277f5d1c3684.1663836372.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT024:EE_|CH0PR12MB5107:EE_ X-MS-Office365-Filtering-Correlation-Id: 28b8cdb0-c53d-4d80-90ef-08da9c781d83 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:(13230022)(4636009)(346002)(136003)(396003)(39860400002)(376002)(451199015)(36840700001)(46966006)(40470700004)(186003)(47076005)(426003)(336012)(7636003)(82310400005)(356005)(8936002)(26005)(921005)(70586007)(70206006)(7696005)(8676002)(4326008)(41300700001)(86362001)(40480700001)(82740400003)(36756003)(40460700003)(36860700001)(2616005)(7416002)(7406005)(2906002)(83380400001)(478600001)(5660300002)(54906003)(316002)(110136005)(2101003)(83996005)(473944003);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2022 08:54:52.9485 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 28b8cdb0-c53d-4d80-90ef-08da9c781d83 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: BN8NAM11FT024.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5107 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220922_015500_174276_46EAD576 X-CRM114-Status: GOOD ( 17.80 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Following the new rules in include/linux/iommu.h kdocs, update all drivers ->attach_dev callback functions to return EINVAL in the failure paths that are related to domain incompatibility. Also, drop adjacent error prints to prevent a kernel log spam. Reviewed-by: Jean-Philippe Brucker Reviewed-by: Lu Baolu Reviewed-by: Kevin Tian Signed-off-by: Nicolin Chen Reviewed-by: Jason Gunthorpe --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 11 +---------- drivers/iommu/arm/arm-smmu/arm-smmu.c | 3 --- drivers/iommu/arm/arm-smmu/qcom_iommu.c | 7 +------ drivers/iommu/intel/iommu.c | 10 +++------- drivers/iommu/ipmmu-vmsa.c | 2 -- drivers/iommu/omap-iommu.c | 2 +- drivers/iommu/sprd-iommu.c | 4 +--- drivers/iommu/tegra-gart.c | 2 +- drivers/iommu/virtio-iommu.c | 3 +-- 9 files changed, 9 insertions(+), 35 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index d32b02336411..f96f8aad8280 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2429,23 +2429,14 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) goto out_unlock; } } else if (smmu_domain->smmu != smmu) { - dev_err(dev, - "cannot attach to SMMU %s (upstream of %s)\n", - dev_name(smmu_domain->smmu->dev), - dev_name(smmu->dev)); - ret = -ENXIO; + ret = -EINVAL; goto out_unlock; } else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1 && master->ssid_bits != smmu_domain->s1_cfg.s1cdmax) { - dev_err(dev, - "cannot attach to incompatible domain (%u SSID bits != %u)\n", - smmu_domain->s1_cfg.s1cdmax, master->ssid_bits); ret = -EINVAL; goto out_unlock; } else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1 && smmu_domain->stall_enabled != master->stall_enabled) { - dev_err(dev, "cannot attach to stall-%s domain\n", - smmu_domain->stall_enabled ? "enabled" : "disabled"); ret = -EINVAL; goto out_unlock; } diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index dfa82df00342..dbd12da31707 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -1167,9 +1167,6 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) * different SMMUs. */ if (smmu_domain->smmu != smmu) { - dev_err(dev, - "cannot attach to SMMU %s whilst already attached to domain on SMMU %s\n", - dev_name(smmu_domain->smmu->dev), dev_name(smmu->dev)); ret = -EINVAL; goto rpm_put; } diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c index 17235116d3bb..37c5ddc212c1 100644 --- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c +++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c @@ -381,13 +381,8 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev * Sanity check the domain. We don't support domains across * different IOMMUs. */ - if (qcom_domain->iommu != qcom_iommu) { - dev_err(dev, "cannot attach to IOMMU %s while already " - "attached to domain on IOMMU %s\n", - dev_name(qcom_domain->iommu->dev), - dev_name(qcom_iommu->dev)); + if (qcom_domain->iommu != qcom_iommu) return -EINVAL; - } return 0; } diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 31bc50e538a3..b1788b3d3b2d 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4181,19 +4181,15 @@ static int prepare_domain_attach_device(struct iommu_domain *domain, return -ENODEV; if (dmar_domain->force_snooping && !ecap_sc_support(iommu->ecap)) - return -EOPNOTSUPP; + return -EINVAL; /* check if this iommu agaw is sufficient for max mapped address */ addr_width = agaw_to_width(iommu->agaw); if (addr_width > cap_mgaw(iommu->cap)) addr_width = cap_mgaw(iommu->cap); - if (dmar_domain->max_addr > (1LL << addr_width)) { - dev_err(dev, "%s: iommu width (%d) is not " - "sufficient for the mapped address (%llx)\n", - __func__, addr_width, dmar_domain->max_addr); - return -EFAULT; - } + if (dmar_domain->max_addr > (1LL << addr_width)) + return -EINVAL; dmar_domain->gaw = addr_width; /* diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 1d42084d0276..f5217a4cb9b3 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -628,8 +628,6 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain, * Something is wrong, we can't attach two devices using * different IOMMUs to the same domain. */ - dev_err(dev, "Can't attach IPMMU %s to domain on IPMMU %s\n", - dev_name(mmu->dev), dev_name(domain->mmu->dev)); ret = -EINVAL; } else dev_info(dev, "Reusing IPMMU context %u\n", domain->context_id); diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 447e40d55918..be12f49140c7 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -1472,7 +1472,7 @@ omap_iommu_attach_dev(struct iommu_domain *domain, struct device *dev) /* only a single client device can be attached to a domain */ if (omap_domain->dev) { dev_err(dev, "iommu domain is already attached\n"); - ret = -EBUSY; + ret = -EINVAL; goto out; } diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c index 511959c8a14d..945576039c9e 100644 --- a/drivers/iommu/sprd-iommu.c +++ b/drivers/iommu/sprd-iommu.c @@ -237,10 +237,8 @@ static int sprd_iommu_attach_device(struct iommu_domain *domain, struct sprd_iommu_domain *dom = to_sprd_domain(domain); size_t pgt_size = sprd_iommu_pgt_size(domain); - if (dom->sdev) { - pr_err("There's already a device attached to this domain.\n"); + if (dom->sdev) return -EINVAL; - } dom->pgt_va = dma_alloc_coherent(sdev->dev, pgt_size, &dom->pgt_pa, GFP_KERNEL); if (!dom->pgt_va) diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index e5ca3cf1a949..ed53279d1106 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -112,7 +112,7 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain, spin_lock(&gart->dom_lock); if (gart->active_domain && gart->active_domain != domain) { - ret = -EBUSY; + ret = -EINVAL; } else if (dev_iommu_priv_get(dev) != domain) { dev_iommu_priv_set(dev, domain); gart->active_domain = domain; diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 4c652773fd6c..87128266b6e3 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -733,8 +733,7 @@ static int viommu_attach_dev(struct iommu_domain *domain, struct device *dev) */ ret = viommu_domain_finalise(vdev, domain); } else if (vdomain->viommu != vdev->viommu) { - dev_err(dev, "cannot attach to foreign vIOMMU\n"); - ret = -EXDEV; + ret = -EINVAL; } mutex_unlock(&vdomain->mutex);