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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Joerg Roedel <joro@8bytes.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Christoph Hellwig <hch@infradead.org>,
	Kevin Tian <kevin.tian@intel.com>,
	Ashok Raj <ashok.raj@intel.com>
Cc: kvm@vger.kernel.org, rafael@kernel.org,
	David Airlie <airlied@linux.ie>,
	linux-pci@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	Diana Craciun <diana.craciun@oss.nxp.com>,
	Will Deacon <will@kernel.org>, Stuart Yoder <stuyoder@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Cornelia Huck <cohuck@redhat.com>,
	linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
	iommu@lists.linux-foundation.org,
	Jacob jun Pan <jacob.jun.pan@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Robin Murphy <robin.murphy@arm.com>
Subject: [PATCH v2 12/17] vfio: Set DMA USER ownership for VFIO devices
Date: Sun, 28 Nov 2021 10:50:46 +0800	[thread overview]
Message-ID: <20211128025051.355578-13-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20211128025051.355578-1-baolu.lu@linux.intel.com>

Set DMA_OWNER_PRIVATE_DOMAIN_USER when an iommu group is set to a
container, and release DMA_OWNER_USER once the iommu group is unset
from a container.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/vfio/fsl-mc/vfio_fsl_mc.c     |  1 +
 drivers/vfio/pci/vfio_pci.c           |  1 +
 drivers/vfio/platform/vfio_amba.c     |  1 +
 drivers/vfio/platform/vfio_platform.c |  1 +
 drivers/vfio/vfio.c                   | 13 ++++++++++++-
 5 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index 6e2e62c6f47a..5f36ffbb07d1 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -588,6 +588,7 @@ static struct fsl_mc_driver vfio_fsl_mc_driver = {
 		.name	= "vfio-fsl-mc",
 		.owner	= THIS_MODULE,
 	},
+	.suppress_auto_claim_dma_owner = true,
 };
 
 static int __init vfio_fsl_mc_driver_init(void)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index a5ce92beb655..31810b074aa4 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -193,6 +193,7 @@ static struct pci_driver vfio_pci_driver = {
 	.remove			= vfio_pci_remove,
 	.sriov_configure	= vfio_pci_sriov_configure,
 	.err_handler		= &vfio_pci_core_err_handlers,
+	.suppress_auto_claim_dma_owner = true,
 };
 
 static void __init vfio_pci_fill_ids(void)
diff --git a/drivers/vfio/platform/vfio_amba.c b/drivers/vfio/platform/vfio_amba.c
index badfffea14fb..e598d6af90ad 100644
--- a/drivers/vfio/platform/vfio_amba.c
+++ b/drivers/vfio/platform/vfio_amba.c
@@ -95,6 +95,7 @@ static struct amba_driver vfio_amba_driver = {
 		.name = "vfio-amba",
 		.owner = THIS_MODULE,
 	},
+	.suppress_auto_claim_dma_owner = true,
 };
 
 module_amba_driver(vfio_amba_driver);
diff --git a/drivers/vfio/platform/vfio_platform.c b/drivers/vfio/platform/vfio_platform.c
index 68a1c87066d7..8bda68775b97 100644
--- a/drivers/vfio/platform/vfio_platform.c
+++ b/drivers/vfio/platform/vfio_platform.c
@@ -76,6 +76,7 @@ static struct platform_driver vfio_platform_driver = {
 	.driver	= {
 		.name	= "vfio-platform",
 	},
+	.suppress_auto_claim_dma_owner = true,
 };
 
 module_platform_driver(vfio_platform_driver);
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 82fb75464f92..00f89acfec39 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1198,6 +1198,9 @@ static void __vfio_group_unset_container(struct vfio_group *group)
 		driver->ops->detach_group(container->iommu_data,
 					  group->iommu_group);
 
+	iommu_group_release_dma_owner(group->iommu_group,
+				      DMA_OWNER_PRIVATE_DOMAIN_USER);
+
 	group->container = NULL;
 	wake_up(&group->container_q);
 	list_del(&group->container_next);
@@ -1282,13 +1285,21 @@ static int vfio_group_set_container(struct vfio_group *group, int container_fd)
 		goto unlock_out;
 	}
 
+	ret = iommu_group_set_dma_owner(group->iommu_group,
+					DMA_OWNER_PRIVATE_DOMAIN_USER, f.file);
+	if (ret)
+		goto unlock_out;
+
 	driver = container->iommu_driver;
 	if (driver) {
 		ret = driver->ops->attach_group(container->iommu_data,
 						group->iommu_group,
 						group->type);
-		if (ret)
+		if (ret) {
+			iommu_group_release_dma_owner(group->iommu_group,
+						      DMA_OWNER_PRIVATE_DOMAIN_USER);
 			goto unlock_out;
+		}
 	}
 
 	group->container = container;
-- 
2.25.1

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  parent reply	other threads:[~2021-11-28  2:52 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-28  2:50 [PATCH v2 00/17] Fix BUG_ON in vfio_iommu_group_notifier() Lu Baolu
2021-11-28  2:50 ` [PATCH v2 01/17] iommu: Add device dma ownership set/release interfaces Lu Baolu
2021-11-28  2:50 ` [PATCH v2 02/17] driver core: Add dma_unconfigure callback in bus_type Lu Baolu
2021-11-28  8:02   ` Greg Kroah-Hartman
2021-11-29  4:03     ` Lu Baolu
2021-11-28  2:50 ` [PATCH v2 03/17] PCI: Add driver dma ownership management Lu Baolu
2021-11-28  2:50 ` [PATCH v2 04/17] driver core: platform: " Lu Baolu
2021-11-28  8:10   ` Greg Kroah-Hartman
2021-11-28 23:15     ` Jason Gunthorpe via iommu
2021-11-29 10:34       ` Greg Kroah-Hartman
2021-11-29 12:59         ` Jason Gunthorpe via iommu
2021-11-28  2:50 ` [PATCH v2 05/17] amba: " Lu Baolu
2021-11-28  2:50 ` [PATCH v2 06/17] bus: fsl-mc: " Lu Baolu
2021-11-28  2:50 ` [PATCH v2 07/17] PCI: pci_stub: Suppress kernel DMA ownership auto-claiming Lu Baolu
2021-11-28  2:50 ` [PATCH v2 08/17] PCI: portdrv: " Lu Baolu
2021-11-28  2:50 ` [PATCH v2 09/17] iommu: Add security context management for assigned devices Lu Baolu
2021-11-28  2:50 ` [PATCH v2 10/17] iommu: Expose group variants of dma ownership interfaces Lu Baolu
2021-11-28  2:50 ` [PATCH v2 11/17] iommu: Add iommu_at[de]tach_device_shared() for multi-device groups Lu Baolu
2021-11-28  2:50 ` Lu Baolu [this message]
2021-11-28  2:50 ` [PATCH v2 13/17] vfio: Remove use of vfio_group_viable() Lu Baolu
2021-11-28  2:50 ` [PATCH v2 14/17] vfio: Delete the unbound_list Lu Baolu
2021-11-28  2:50 ` [PATCH v2 15/17] vfio: Remove iommu group notifier Lu Baolu
2021-11-28  2:50 ` [PATCH v2 16/17] iommu: Remove iommu group changes notifier Lu Baolu
2021-11-28  2:50 ` [PATCH v2 17/17] drm/tegra: Use the iommu dma_owner mechanism Lu Baolu
2021-11-28  8:10 ` [PATCH v2 00/17] Fix BUG_ON in vfio_iommu_group_notifier() Greg Kroah-Hartman
2021-11-29  3:59   ` Lu Baolu
2021-12-06  2:07 ` Lu Baolu

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