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authorStefano Garzarella <sgarzare@redhat.com>2021-11-26 19:47:53 +0300
committerMichael S. Tsirkin <mst@redhat.com>2022-01-15 02:50:52 +0300
commit539fec78edb4e084e7c532affc56cc42d4ceea4b (patch)
tree9133b2c1371f74c163528d9ec4d6bcaef25bcea5 /include/linux/vdpa.h
parent9c25cdeb5f3ca9ef0d683ee8c29b7cb61a174165 (diff)
downloadlinux-539fec78edb4e084e7c532affc56cc42d4ceea4b.tar.xz
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.h2
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;