[PATCH 3/5] vhost-user-blk: add VIRTIO_F_RING_PACKED feature bit

From: Stefan Hajnoczi <stefanha@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
	"Laurent Vivier" <lvivier@redhat.com>,
	"Thomas Huth" <thuth@redhat.com>,
	"Eduardo Habkost" <ehabkost@redhat.com>,
	qemu-block@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>,
	jasowang@redhat.com, cohuck@redhat.com,
	"Stefan Hajnoczi" <stefanha@redhat.com>,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	"Raphael Norwitz" <raphael.norwitz@nutanix.com>,
	"Gonglei (Arei)" <arei.gonglei@huawei.com>,
	"Gerd Hoffmann" <kraxel@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>,
	"Fam Zheng" <fam@euphon.net>, "Max Reitz" <mreitz@redhat.com>
Subject: [PATCH 3/5] vhost-user-blk: add VIRTIO_F_RING_PACKED feature bit
Date: Fri, 22 May 2020 18:17:24 +0100	[thread overview]
Message-ID: <20200522171726.648279-4-stefanha@redhat.com> (raw)
In-Reply-To: <20200522171726.648279-1-stefanha@redhat.com>

Vhost devices have a list of feature bits that the device backend is
allowed to control. The VIRTIO_F_RING_PACKED feature is a feature that
must be negotiated through all the way to the device backend. Add it so
the device backend can declare whether or not it supports the packed
ring layout.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 hw/block/vhost-user-blk.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index 9d8c0b3909..10e114a19a 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -44,6 +44,7 @@ static const int user_feature_bits[] = {
     VIRTIO_BLK_F_DISCARD,
     VIRTIO_BLK_F_WRITE_ZEROES,
     VIRTIO_F_VERSION_1,
+    VIRTIO_F_RING_PACKED,
     VIRTIO_RING_F_INDIRECT_DESC,
     VIRTIO_RING_F_EVENT_IDX,
     VIRTIO_F_NOTIFY_ON_EMPTY,
-- 
2.25.3

