From: Yi Liu <yi.l.liu@intel.com>
To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com
Cc: joro@8bytes.org, robin.murphy@arm.com, cohuck@redhat.com,
eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org,
mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com,
yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com,
jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com,
lulu@redhat.com, suravee.suthikulpanit@amd.com,
intel-gvt-dev@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org, linux-s390@vger.kernel.org,
xudong.hao@intel.com, yan.y.zhao@intel.com,
terrence.xu@intel.com, yanting.jiang@intel.com
Subject: [PATCH v8 13/24] vfio-iommufd: Split bind/attach into two steps
Date: Mon, 27 Mar 2023 02:40:36 -0700 [thread overview]
Message-ID: <20230327094047.47215-14-yi.l.liu@intel.com> (raw)
In-Reply-To: <20230327094047.47215-1-yi.l.liu@intel.com>
to align with the coming vfio device cdev support.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/vfio/group.c | 18 ++++++++++++++----
drivers/vfio/iommufd.c | 33 ++++++++++++++-------------------
drivers/vfio/vfio.h | 9 +++++++++
3 files changed, 37 insertions(+), 23 deletions(-)
diff --git a/drivers/vfio/group.c b/drivers/vfio/group.c
index d7e4a7c2da95..8f09e4541c3a 100644
--- a/drivers/vfio/group.c
+++ b/drivers/vfio/group.c
@@ -203,9 +203,14 @@ static int vfio_device_group_open(struct vfio_device_file *df)
}
ret = vfio_device_open(df);
- if (ret) {
- df->iommufd = NULL;
+ if (ret)
goto out_put_kvm;
+
+ if (df->iommufd) {
+ ret = vfio_iommufd_attach_compat_ioas(device,
+ df->iommufd);
+ if (ret)
+ goto out_close_device;
}
/*
@@ -214,12 +219,17 @@ static int vfio_device_group_open(struct vfio_device_file *df)
*/
smp_store_release(&df->access_granted, true);
+ mutex_unlock(&device->dev_set->lock);
+ mutex_unlock(&device->group->group_lock);
+ return 0;
+
+out_close_device:
+ vfio_device_close(df);
out_put_kvm:
+ df->iommufd = NULL;
if (device->open_count == 0)
vfio_device_put_kvm(device);
-
mutex_unlock(&device->dev_set->lock);
-
out_unlock:
mutex_unlock(&device->group->group_lock);
return ret;
diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c
index d512fc057999..b32e757bdac5 100644
--- a/drivers/vfio/iommufd.c
+++ b/drivers/vfio/iommufd.c
@@ -30,33 +30,28 @@ int vfio_iommufd_enable_noiommu_compat(struct vfio_device *device,
int vfio_iommufd_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx)
{
- u32 ioas_id;
u32 device_id;
- int ret;
lockdep_assert_held(&vdev->dev_set->lock);
- ret = vdev->ops->bind_iommufd(vdev, ictx, &device_id);
- if (ret)
- return ret;
+ /* The legacy path has no way to return the device id */
+ return vdev->ops->bind_iommufd(vdev, ictx, &device_id);
+}
+
+int vfio_iommufd_attach_compat_ioas(struct vfio_device *vdev,
+ struct iommufd_ctx *ictx)
+{
+ u32 ioas_id;
+ int ret;
+
+ lockdep_assert_held(&vdev->dev_set->lock);
ret = iommufd_vfio_compat_ioas_get_id(ictx, &ioas_id);
if (ret)
- goto err_unbind;
- ret = vdev->ops->attach_ioas(vdev, &ioas_id);
- if (ret)
- goto err_unbind;
-
- /*
- * The legacy path has no way to return the device id or the selected
- * pt_id
- */
- return 0;
+ return ret;
-err_unbind:
- if (vdev->ops->unbind_iommufd)
- vdev->ops->unbind_iommufd(vdev);
- return ret;
+ /* The legacy path has no way to return the selected pt_id */
+ return vdev->ops->attach_ioas(vdev, &ioas_id);
}
void vfio_iommufd_unbind(struct vfio_device *vdev)
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h
index 136137b8618d..abfaf85cc266 100644
--- a/drivers/vfio/vfio.h
+++ b/drivers/vfio/vfio.h
@@ -238,6 +238,8 @@ static inline void vfio_container_cleanup(void)
#if IS_ENABLED(CONFIG_IOMMUFD)
int vfio_iommufd_enable_noiommu_compat(struct vfio_device *device,
struct iommufd_ctx *ictx);
+int vfio_iommufd_attach_compat_ioas(struct vfio_device *device,
+ struct iommufd_ctx *ictx);
int vfio_iommufd_bind(struct vfio_device *device, struct iommufd_ctx *ictx);
void vfio_iommufd_unbind(struct vfio_device *device);
#else
@@ -248,6 +250,13 @@ vfio_iommufd_enable_noiommu_compat(struct vfio_device *device,
return -EOPNOTSUPP;
}
+static inline int
+vfio_iommufd_attach_compat_ioas(struct vfio_device *device,
+ struct iommufd_ctx *ictx)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int vfio_iommufd_bind(struct vfio_device *device,
struct iommufd_ctx *ictx)
{
--
2.34.1
next prev parent reply other threads:[~2023-03-27 9:41 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-27 9:40 [PATCH v8 00/24] Add vfio_device cdev for iommufd support Yi Liu
2023-03-27 9:40 ` [PATCH v8 01/24] vfio: Allocate per device file structure Yi Liu
2023-03-27 9:40 ` [PATCH v8 02/24] vfio: Refine vfio file kAPIs for KVM Yi Liu
2023-03-27 9:40 ` [PATCH v8 03/24] vfio: Remove vfio_file_is_group() Yi Liu
2023-03-30 23:50 ` Jason Gunthorpe
2023-03-27 9:40 ` [PATCH v8 04/24] vfio: Accept vfio device file in the KVM facing kAPI Yi Liu
2023-03-27 9:40 ` [PATCH v8 05/24] kvm/vfio: Rename kvm_vfio_group to prepare for accepting vfio device fd Yi Liu
2023-03-27 9:40 ` [PATCH v8 06/24] kvm/vfio: Accept vfio device file from userspace Yi Liu
2023-03-27 9:40 ` [PATCH v8 07/24] vfio: Pass struct vfio_device_file * to vfio_device_open/close() Yi Liu
2023-03-27 9:40 ` [PATCH v8 08/24] vfio: Block device access via device fd until device is opened Yi Liu
2023-03-28 21:33 ` Alex Williamson
2023-03-29 2:23 ` Liu, Yi L
2023-03-27 9:40 ` [PATCH v8 09/24] vfio: Add cdev_device_open_cnt to vfio_group Yi Liu
2023-03-27 9:40 ` [PATCH v8 10/24] vfio: Make vfio_device_open() single open for device cdev path Yi Liu
2023-03-30 23:52 ` Jason Gunthorpe
2023-03-27 9:40 ` [PATCH v8 11/24] vfio: Make vfio_device_first_open() to accept NULL iommufd for noiommu Yi Liu
2023-03-30 23:56 ` Jason Gunthorpe
2023-03-27 9:40 ` [PATCH v8 12/24] vfio-iommufd: Move noiommu support out of vfio_iommufd_bind() Yi Liu
2023-03-27 9:40 ` Yi Liu [this message]
2023-03-27 9:40 ` [PATCH v8 14/24] vfio: Record devid in vfio_device_file Yi Liu
2023-03-27 9:40 ` [PATCH v8 15/24] vfio-iommufd: Add detach_ioas support for physical VFIO devices Yi Liu
2023-03-27 9:40 ` [PATCH v8 16/24] iommufd/device: Add iommufd_access_detach() API Yi Liu
2023-03-28 2:23 ` Jon Pan-Doh
2023-03-28 15:54 ` Nicolin Chen
2023-03-29 2:24 ` Liu, Yi L
2023-03-27 9:40 ` [PATCH v8 17/24] vfio-iommufd: Add detach_ioas support for emulated VFIO devices Yi Liu
2023-03-27 9:40 ` [PATCH v8 18/24] vfio: Determine noiommu in vfio_device registration Yi Liu
2023-03-28 6:36 ` Tian, Kevin
2023-03-27 9:40 ` [PATCH v8 19/24] vfio: Name noiommu vfio_device with "noiommu-" prefix Yi Liu
2023-03-28 6:37 ` Tian, Kevin
2023-03-27 9:40 ` [PATCH v8 20/24] vfio: Add cdev for vfio_device Yi Liu
2023-03-29 19:57 ` Alex Williamson
2023-03-30 5:35 ` Liu, Yi L
2023-03-27 9:40 ` [PATCH v8 21/24] vfio: Add VFIO_DEVICE_BIND_IOMMUFD Yi Liu
2023-03-29 21:00 ` Alex Williamson
2023-03-29 23:22 ` Jason Gunthorpe
2023-03-30 12:52 ` Liu, Yi L
2023-03-30 12:59 ` Jason Gunthorpe
2023-03-30 7:09 ` Liu, Yi L
2023-03-30 11:52 ` Jason Gunthorpe
2023-03-30 12:53 ` Liu, Yi L
2023-03-27 9:40 ` [PATCH v8 22/24] vfio: Add VFIO_DEVICE_AT[DE]TACH_IOMMUFD_PT Yi Liu
2023-03-29 21:19 ` Alex Williamson
2023-03-30 13:02 ` Liu, Yi L
2023-03-27 9:40 ` [PATCH v8 23/24] vfio: Compile group optionally Yi Liu
2023-03-29 21:51 ` Alex Williamson
2023-03-30 13:06 ` Liu, Yi L
2023-03-27 9:40 ` [PATCH v8 24/24] docs: vfio: Add vfio device cdev description Yi Liu
2023-03-29 22:47 ` Alex Williamson
2023-03-29 22:57 ` Alex Williamson
2023-03-30 13:11 ` Liu, Yi L
2023-03-27 17:48 ` [PATCH v8 00/24] Add vfio_device cdev for iommufd support Nicolin Chen
2023-03-31 3:10 ` Jiang, Yanting
2023-03-31 5:01 ` Jiang, Yanting
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