From: jiangdongxu1 jiangdongxu1@huawei.com
mainline inclusion from v6.3-rc1 commit 1538a8a49ecbe6d3302cd7f347632338e56857f8 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I86ITO Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Add a new operation to allow a vDPA device to be resumed after it has been suspended. Trying to resume a device that wasn't suspended will result in a no-op.
This operation is optional. If it's not implemented, the associated backend feature bit will not be exposed. And if the feature bit is not exposed, invoking this operation will return an error.
Acked-by: Jason Wang jasowang@redhat.com Signed-off-by: Sebastien Boeuf sebastien.boeuf@intel.com Message-Id: 6e05c4b31b47f3e29cb2bd7ebd56c81f84b8f48a.1672742878.git.sebastien.boeuf@intel.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Reviewed-by: Stefano Garzarella sgarzare@redhat.com Signed-off-by: jiangdongxu1 jiangdongxu1@huawei.com --- include/linux/vdpa.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 3751b672451d..ffb1fd135182 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -216,7 +216,10 @@ struct vdpa_map_file { * @reset: Reset device * @vdev: vdpa device * Returns integer: success (0) or error (< 0) - * @suspend: Suspend or resume the device (optional) + * @suspend: Suspend the device (optional) + * @vdev: vdpa device + * Returns integer: success (0) or error (< 0) + * @resume: Resume the device (optional) * @vdev: vdpa device * Returns integer: success (0) or error (< 0) * @get_config_size: Get the size of the configuration space includes @@ -321,6 +324,7 @@ struct vdpa_config_ops { void (*set_status)(struct vdpa_device *vdev, u8 status); int (*reset)(struct vdpa_device *vdev); int (*suspend)(struct vdpa_device *vdev); + int (*resume)(struct vdpa_device *vdev); size_t (*get_config_size)(struct vdpa_device *vdev); void (*get_config)(struct vdpa_device *vdev, unsigned int offset, void *buf, unsigned int len);