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author | Yi Liu <yi.l.liu@intel.com> | 2023-07-18 16:55:26 +0300 |
---|---|---|
committer | Alex Williamson <alex.williamson@redhat.com> | 2023-07-25 19:18:17 +0300 |
commit | b1a3b5c61d27299799a61e50e08f507b2e9a8a75 (patch) | |
tree | 09db48878f3f87e4427482d9a3f6f8ed3761b468 /drivers/vfio/group.c | |
parent | 71791b9246c7339f0d151e853546acc653522e2f (diff) | |
download | linux-b1a3b5c61d27299799a61e50e08f507b2e9a8a75.tar.xz |
vfio: Allocate per device file structure
This is preparation for adding vfio device cdev support. vfio device
cdev requires:
1) A per device file memory to store the kvm pointer set by KVM. It will
be propagated to vfio_device:kvm after the device cdev file is bound
to an iommufd.
2) A mechanism to block device access through device cdev fd before it
is bound to an iommufd.
To address the above requirements, this adds a per device file structure
named vfio_device_file. For now, it's only a wrapper of struct vfio_device
pointer. Other fields will be added to this per file structure in future
commits.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718135551.6592-2-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/group.c')
-rw-r--r-- | drivers/vfio/group.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/vfio/group.c b/drivers/vfio/group.c index fc75c1000d74..fbba9fc15e57 100644 --- a/drivers/vfio/group.c +++ b/drivers/vfio/group.c @@ -218,19 +218,26 @@ void vfio_device_group_close(struct vfio_device *device) static struct file *vfio_device_open_file(struct vfio_device *device) { + struct vfio_device_file *df; struct file *filep; int ret; + df = vfio_allocate_device_file(device); + if (IS_ERR(df)) { + ret = PTR_ERR(df); + goto err_out; + } + ret = vfio_device_group_open(device); if (ret) - goto err_out; + goto err_free; /* * We can't use anon_inode_getfd() because we need to modify * the f_mode flags directly to allow more than just ioctls */ filep = anon_inode_getfile("[vfio-device]", &vfio_device_fops, - device, O_RDWR); + df, O_RDWR); if (IS_ERR(filep)) { ret = PTR_ERR(filep); goto err_close_device; @@ -254,6 +261,8 @@ static struct file *vfio_device_open_file(struct vfio_device *device) err_close_device: vfio_device_group_close(device); +err_free: + kfree(df); err_out: return ERR_PTR(ret); } |