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vhost-user: support registering external host notifiers

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This patch introduces VHOST_USER_PROTOCOL_F_HOST_NOTIFIER.
With this feature negotiated, vhost-user backend can register
memory region based host notifiers. And it will allow the guest
driver in the VM to notify the hardware accelerator at the
vhost-user backend directly.

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Tiwei Bie 2018-05-24 18:33:34 +08:00 • committed by Michael S. Tsirkin
parent 4d0cf552d3
commit 44866521bd
3 changed files with 154 additions and 0 deletions
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8
include/hw/virtio/vhost-user.h
View file

@ -9,9 +9,17 @@
#define HW_VIRTIO_VHOST_USER_H
#include "chardev/char-fe.h"
#include "hw/virtio/virtio.h"
typedef struct VhostUserHostNotifier {
MemoryRegion mr;
void *addr;
bool set;
} VhostUserHostNotifier;
typedef struct VhostUserState {
CharBackend *chr;
VhostUserHostNotifier notifier[VIRTIO_QUEUE_MAX];
} VhostUserState;
VhostUserState *vhost_user_init(void);