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Add vhost-user-input-pci

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Add a new virtio-input device, which connects to a vhost-user
backend.

Instead of reading configuration directly from an input device /
evdev (like virtio-input-host), it reads it over vhost-user protocol
with {SET,GET}_CONFIG messages. The vhost-user-backend handles the
queues & events setup.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190503130034.24916-5-marcandre.lureau@redhat.com

[ kraxel: drop -{non-,}transitional variants ]
[ kraxel: fix "make check" on !linux ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2019-05-03 15:00:32 +02:00 • committed by Gerd Hoffmann
parent f24bb7287d
commit 9c4d05b741
7 changed files with 201 additions and 0 deletions
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50
hw/virtio/vhost-user-input-pci.c Normal file
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/*
* This work is licensed under the terms of the GNU LGPL, version 2 or
* later. See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-input.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "virtio-pci.h"
typedef struct VHostUserInputPCI VHostUserInputPCI;
#define TYPE_VHOST_USER_INPUT_PCI "vhost-user-input-pci"
#define VHOST_USER_INPUT_PCI(obj) \
OBJECT_CHECK(VHostUserInputPCI, (obj), TYPE_VHOST_USER_INPUT_PCI)
struct VHostUserInputPCI {
VirtIOPCIProxy parent_obj;
VHostUserInput vhi;
};
static void vhost_user_input_pci_instance_init(Object *obj)
{
VHostUserInputPCI *dev = VHOST_USER_INPUT_PCI(obj);
virtio_instance_init_common(obj, &dev->vhi, sizeof(dev->vhi),
TYPE_VHOST_USER_INPUT);
object_property_add_alias(obj, "chardev",
OBJECT(&dev->vhi), "chardev",
&error_abort);
}
static const VirtioPCIDeviceTypeInfo vhost_user_input_pci_info = {
.generic_name = TYPE_VHOST_USER_INPUT_PCI,
.parent = TYPE_VIRTIO_INPUT_PCI,
.instance_size = sizeof(VHostUserInputPCI),
.instance_init = vhost_user_input_pci_instance_init,
};
static void vhost_user_input_pci_register(void)
{
virtio_pci_types_register(&vhost_user_input_pci_info);
}
type_init(vhost_user_input_pci_register)