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Message-Id: <20220104015644.2294354-11-baolu.lu@linux.intel.com>
Date: Tue, 4 Jan 2022 09:56:40 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Joerg Roedel <joro@...tes.org>,
Alex Williamson <alex.williamson@...hat.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Jason Gunthorpe <jgg@...dia.com>,
Christoph Hellwig <hch@...radead.org>,
Kevin Tian <kevin.tian@...el.com>,
Ashok Raj <ashok.raj@...el.com>
Cc: Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
Dan Williams <dan.j.williams@...el.com>, rafael@...nel.org,
Diana Craciun <diana.craciun@....nxp.com>,
Cornelia Huck <cohuck@...hat.com>,
Eric Auger <eric.auger@...hat.com>,
Liu Yi L <yi.l.liu@...el.com>,
Jacob jun Pan <jacob.jun.pan@...el.com>,
Chaitanya Kulkarni <kch@...dia.com>,
Stuart Yoder <stuyoder@...il.com>,
Laurentiu Tudor <laurentiu.tudor@....com>,
Thierry Reding <thierry.reding@...il.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Jonathan Hunter <jonathanh@...dia.com>,
Li Yang <leoyang.li@....com>,
Dmitry Osipenko <digetx@...il.com>,
iommu@...ts.linux-foundation.org, linux-pci@...r.kernel.org,
kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v5 10/14] vfio: Set DMA ownership for VFIO devices
Claim group dma ownership when an iommu group is set to a container,
and release DMA_OWNER_USER once the iommu group is unset from the
container.
Signed-off-by: Lu Baolu <baolu.lu@...ux.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 | 10 +++++++++-
5 files changed, 13 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..f133971d1c1f 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,
},
+ .no_kernel_api_dma = 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..8cd1e5a855da 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,
+ .no_kernel_api_dma = 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..39407ca143d5 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,
},
+ .no_kernel_api_dma = 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..46848a58fc99 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",
},
+ .no_kernel_api_dma = true,
};
module_platform_driver(vfio_platform_driver);
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 735d1d344af9..ef22fa312c2a 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1198,6 +1198,8 @@ 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);
+
group->container = NULL;
wake_up(&group->container_q);
list_del(&group->container_next);
@@ -1282,13 +1284,19 @@ 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, 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);
goto unlock_out;
+ }
}
group->container = container;
--
2.25.1
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