From eee77809733d3a94c0d78a29a93d032c1faefd2c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Mon, 10 Jul 2023 16:35:09 +0100 Subject: virtio: add vhost-user-base and a generic vhost-user-device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In theory we shouldn't need to repeat so much boilerplate to support vhost-user backends. This provides a generic vhost-user-base QOM object and a derived vhost-user-device for which the user needs to provide the few bits of information that aren't currently provided by the vhost-user protocol. This should provide a baseline implementation from which the other vhost-user stub can specialise. Signed-off-by: Alex Bennée Message-Id: <20230710153522.3469097-8-alex.bennee@linaro.org> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/virtio/vhost-user-device.h | 45 +++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 include/hw/virtio/vhost-user-device.h (limited to 'include') diff --git a/include/hw/virtio/vhost-user-device.h b/include/hw/virtio/vhost-user-device.h new file mode 100644 index 0000000..9105011 --- /dev/null +++ b/include/hw/virtio/vhost-user-device.h @@ -0,0 +1,45 @@ +/* + * Vhost-user generic virtio device + * + * Copyright (c) 2023 Linaro Ltd + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef QEMU_VHOST_USER_DEVICE_H +#define QEMU_VHOST_USER_DEVICE_H + +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-user.h" + +#define TYPE_VHOST_USER_BASE "vhost-user-base" + +OBJECT_DECLARE_TYPE(VHostUserBase, VHostUserBaseClass, VHOST_USER_BASE) + +struct VHostUserBase { + VirtIODevice parent; + /* Properties */ + CharBackend chardev; + uint16_t virtio_id; + uint32_t num_vqs; + /* State tracking */ + VhostUserState vhost_user; + struct vhost_virtqueue *vhost_vq; + struct vhost_dev vhost_dev; + GPtrArray *vqs; + bool connected; +}; + + /* needed so we can use the base realize after specialisation + tweaks */ +struct VHostUserBaseClass { + /*< private >*/ + VirtioDeviceClass parent_class; + /*< public >*/ + DeviceRealize parent_realize; +}; + +/* shared for the benefit of the derived pci class */ +#define TYPE_VHOST_USER_DEVICE "vhost-user-device" + +#endif /* QEMU_VHOST_USER_DEVICE_H */ -- cgit v1.1