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hw/virtio: add vhost-user-snd and vhost-user-snd-pci devices

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Tested with rust-vmm vhost-user-sound daemon:

    RUST_LOG=trace cargo run --bin vhost-user-sound -- --socket /tmp/snd.sock --backend null

Invocation:

    qemu-system-x86_64  \
            -qmp unix:./qmp-sock,server,wait=off  \
            -m 4096 \
            -numa node,memdev=mem \
            -object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on \
            -D qemu.log \
            -d guest_errors,trace:\*snd\*,trace:\*sound\*,trace:\*vhost\* \
            -chardev socket,id=vsnd,path=/tmp/snd.sock \
            -device vhost-user-snd-pci,chardev=vsnd,id=snd \
            /path/to/disk

[AJB: imported from 54ae1cdd15.patch]

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Message-Id: <20240104210945.1223134-7-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Manos Pitsidianakis 2024-01-04 21:09:40 +00:00 • committed by Michael S. Tsirkin
parent a50616b50d
commit 4ae0fc18a1
6 changed files with 181 additions and 0 deletions
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67
hw/virtio/vhost-user-snd.c Normal file
View file

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/*
* Vhost-user snd virtio device
*
* Copyright (c) 2023 Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
*
* Simple wrapper of the generic vhost-user-device.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/qdev-properties.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/vhost-user-snd.h"
#include "standard-headers/linux/virtio_ids.h"
#include "standard-headers/linux/virtio_snd.h"
static const VMStateDescription vu_snd_vmstate = {
.name = "vhost-user-snd",
.unmigratable = 1,
};
static Property vsnd_properties[] = {
DEFINE_PROP_CHR("chardev", VHostUserBase, chardev),
DEFINE_PROP_END_OF_LIST(),
};
static void vu_snd_base_realize(DeviceState *dev, Error **errp)
{
VHostUserBase *vub = VHOST_USER_BASE(dev);
VHostUserBaseClass *vubs = VHOST_USER_BASE_GET_CLASS(dev);
vub->virtio_id = VIRTIO_ID_SOUND;
vub->num_vqs = 4;
vub->config_size = sizeof(struct virtio_snd_config);
vub->vq_size = 64;
vubs->parent_realize(dev, errp);
}
static void vu_snd_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
dc->vmsd = &vu_snd_vmstate;
device_class_set_props(dc, vsnd_properties);
device_class_set_parent_realize(dc, vu_snd_base_realize,
&vubc->parent_realize);
set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
}
static const TypeInfo vu_snd_info = {
.name = TYPE_VHOST_USER_SND,
.parent = TYPE_VHOST_USER_BASE,
.instance_size = sizeof(VHostUserSound),
.class_init = vu_snd_class_init,
};
static void vu_snd_register_types(void)
{
type_register_static(&vu_snd_info);
}
type_init(vu_snd_register_types)