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| author |   Stefano Garzarella <sgarzare@redhat.com> | 2021-11-26 17:47:53 +0100 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2022-01-14 18:50:52 -0500 |
| commit | 539fec78edb4e084e7c532affc56cc42d4ceea4b (patch) | |
| tree | 9133b2c1371f74c163528d9ec4d6bcaef25bcea5 /include/linux/vdpa.h | |
| parent | docs: document sysfs ABI for vDPA bus (diff) | |
| download | linux-dev-539fec78edb4e084e7c532affc56cc42d4ceea4b.tar.xz linux-dev-539fec78edb4e084e7c532affc56cc42d4ceea4b.zip | |
vdpa: add driver_override support
`driver_override` allows to control which of the vDPA bus drivers
binds to a vDPA device.
If `driver_override` is not set, the previous behaviour is followed:
devices use the first vDPA bus driver loaded (unless auto binding
is disabled).
Tested on Fedora 34 with driverctl(8):
$ modprobe virtio-vdpa
$ modprobe vhost-vdpa
$ modprobe vdpa-sim-net
$ vdpa dev add mgmtdev vdpasim_net name dev1
# dev1 is attached to the first vDPA bus driver loaded
$ driverctl -b vdpa list-devices
dev1 virtio_vdpa
$ driverctl -b vdpa set-override dev1 vhost_vdpa
$ driverctl -b vdpa list-devices
dev1 vhost_vdpa [*]
Note: driverctl(8) integrates with udev so the binding is
preserved.
Suggested-by: Jason Wang <jasowang@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20211126164753.181829-3-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/vdpa.h')
| -rw-r--r-- | include/linux/vdpa.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index c3011ccda430..ae34015b37b7 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -64,6 +64,7 @@ struct vdpa_mgmt_dev; * struct vdpa_device - representation of a vDPA device * @dev: underlying device * @dma_dev: the actual device that is performing DMA + * @driver_override: driver name to force a match * @config: the configuration ops for this device. * @cf_mutex: Protects get and set access to configuration layout. * @index: device index @@ -76,6 +77,7 @@ struct vdpa_mgmt_dev; struct vdpa_device { struct device dev; struct device *dma_dev; + const char *driver_override; const struct vdpa_config_ops *config; struct mutex cf_mutex; /* Protects get/set config */ unsigned int index; |