diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2020-05-29 17:13:38 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-06-12 10:17:06 -0400 |
| commit | a9a5c473d25d83bcdad27d97e5fb451950ee894a (patch) | |
| tree | d0e7564428aa96c3a3075a875afd3b03dd00e8dd /scripts/qemu-guest-agent/fsfreeze-hook | |
| parent | b650d5f4b1cd3f9f8c4fdb319838c5c1e0695e41 (diff) | |
libvhost-user: advertise vring features
libvhost-user implements several vring features without advertising
them. There is no way for the vhost-user master to detect support for
these features.
Things more or less work today because QEMU assumes the vhost-user
backend always implements certain feature bits like
VIRTIO_RING_F_EVENT_IDX. This is not documented anywhere.
This patch explicitly advertises features implemented in libvhost-user
so that the vhost-user master does not need to make undocumented
assumptions.
Feature bits that libvhost-user now advertises can be removed from
vhost-user-blk.c. Devices should not be responsible for advertising
vring feature bits, that is libvhost-user's job.
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200529161338.456017-1-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Diffstat (limited to 'scripts/qemu-guest-agent/fsfreeze-hook')
0 files changed, 0 insertions, 0 deletions