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bh=YUVTQQBzd0maoDfNvLjo506giUrIx9WrSBTpTmnv8Ic=; b=CwN3ygX1e4Ls9qEwlLWEBgkMr35hBX8+n1adXLC3AwoLVL1ri2SunPcK5NSgD/Tz3JHuj+ 1OQCPGvMkqvrQAEA86riC5HolOzrPRSVpfRUjAPlBC6yXTlMgyWRYW7VSJ9I1QNjTF+SDq QHx9z99FI2MeSA81DTX+1emjBtP+Ctg= X-MC-Unique: C9-fYSFLNYSuhm4EGHPbuw-1 From: Cindy Lu To: mst@redhat.com, armbru@redhat.com, eblake@redhat.com, cohuck@redhat.com, jasowang@redhat.com Subject: [PATCH v3 03/13] virtio-bus: introduce queue_enabled method Date: Wed, 1 Jul 2020 17:24:39 +0800 Message-Id: <20200701092449.17451-4-lulu@redhat.com> In-Reply-To: <20200701092449.17451-1-lulu@redhat.com> References: <20200701092449.17451-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lulu@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Jason Wang This patch introduces queue_enabled() method which allows the transport to implement its own way to report whether or not a queue is enabled. Signed-off-by: Jason Wang Signed-off-by: Cindy Lu --- hw/virtio/virtio.c | 6 ++++++ include/hw/virtio/virtio-bus.h | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index cc9c9dc162..5bd2a2f621 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3286,6 +3286,12 @@ hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev= , int n) =20 bool virtio_queue_enabled(VirtIODevice *vdev, int n) { + BusState *qbus =3D qdev_get_parent_bus(DEVICE(vdev)); + VirtioBusClass *k =3D VIRTIO_BUS_GET_CLASS(qbus); + + if (k->queue_enabled) { + return k->queue_enabled(qbus->parent, n); + } return virtio_queue_get_desc_addr(vdev, n) !=3D 0; } =20 diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h index 38c9399cd4..0f6f215925 100644 --- a/include/hw/virtio/virtio-bus.h +++ b/include/hw/virtio/virtio-bus.h @@ -83,6 +83,10 @@ typedef struct VirtioBusClass { */ int (*ioeventfd_assign)(DeviceState *d, EventNotifier *notifier, int n, bool assign); + /* + * Whether queue number n is enabled. + */ + bool (*queue_enabled)(DeviceState *d, int n); /* * Does the transport have variable vring alignment? * (ie can it ever call virtio_queue_set_align()?) --=20 2.21.1