diff options
| author | Kangjie Xu | 2022-10-17 11:25:46 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2022-11-07 19:12:20 +0100 |
| commit | 3c37f8b8d1e5f524c9d04d3e1d8125334e93e2eb (patch) | |
| tree | 07e1d85ee6ff0542d6c7393b80abf64d16456699 | |
| parent | virtio: introduce virtio_queue_reset() (diff) | |
| download | qemu-3c37f8b8d1e5f524c9d04d3e1d8125334e93e2eb.tar.gz qemu-3c37f8b8d1e5f524c9d04d3e1d8125334e93e2eb.tar.xz qemu-3c37f8b8d1e5f524c9d04d3e1d8125334e93e2eb.zip | |
virtio: introduce virtio_queue_enable()
Introduce the interface queue_enable() in VirtioDeviceClass and the
fucntion virtio_queue_enable() in virtio, it can be called when
VIRTIO_PCI_COMMON_Q_ENABLE is written and related virtqueue can be
started. It only supports the devices of virtio 1 or later. The
not-supported devices can only start the virtqueue when DRIVER_OK.
Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-4-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/virtio/virtio.c | 14 | ||||
| -rw-r--r-- | include/hw/virtio/virtio.h | 2 |
2 files changed, 16 insertions, 0 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index cf5f9ca387..9683b2e158 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -2495,6 +2495,20 @@ void virtio_queue_reset(VirtIODevice *vdev, uint32_t queue_index) __virtio_queue_reset(vdev, queue_index); } +void virtio_queue_enable(VirtIODevice *vdev, uint32_t queue_index) +{ + VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); + + if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { + error_report("queue_enable is only suppported in devices of virtio " + "1.0 or later."); + } + + if (k->queue_enable) { + k->queue_enable(vdev, queue_index); + } +} + void virtio_reset(void *opaque) { VirtIODevice *vdev = opaque; diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 74d76c1dbc..b00b3fcf31 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -149,6 +149,7 @@ struct VirtioDeviceClass { void (*reset)(VirtIODevice *vdev); void (*set_status)(VirtIODevice *vdev, uint8_t val); void (*queue_reset)(VirtIODevice *vdev, uint32_t queue_index); + void (*queue_enable)(VirtIODevice *vdev, uint32_t queue_index); /* For transitional devices, this is a bitmap of features * that are only exposed on the legacy interface but not * the modern one. @@ -288,6 +289,7 @@ int virtio_queue_set_host_notifier_mr(VirtIODevice *vdev, int n, int virtio_set_status(VirtIODevice *vdev, uint8_t val); void virtio_reset(void *opaque); void virtio_queue_reset(VirtIODevice *vdev, uint32_t queue_index); +void virtio_queue_enable(VirtIODevice *vdev, uint32_t queue_index); void virtio_update_irq(VirtIODevice *vdev); int virtio_set_features(VirtIODevice *vdev, uint64_t val); |