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[Qemu-devel] [PATCH V8 3/9] virtio: introduce virtio_get_num_queues()
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PATCH V8 3/9] virtio: introduce virtio_get_num_queues() |
Date: |
Fri, 29 May 2015 14:15:26 +0800 |
This patch introduces virtio_get_num_queues() which iterates the vqs
array and return the number of virtqueues used by device.
Signed-off-by: Jason Wang <address@hidden>
---
hw/virtio/virtio.c | 13 +++++++++++++
include/hw/virtio/virtio.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 0b50f9d..81d8905 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -746,6 +746,19 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n)
return vdev->vq[n].vring.num;
}
+int virtio_get_num_queues(VirtIODevice *vdev)
+{
+ int i;
+
+ for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ if (!virtio_queue_get_num(vdev, i)) {
+ break;
+ }
+ }
+
+ return i;
+}
+
int virtio_queue_get_id(VirtQueue *vq)
{
VirtIODevice *vdev = vq->vdev;
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 8210cb3..175195d 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -175,6 +175,7 @@ void virtio_queue_set_addr(VirtIODevice *vdev, int n,
hwaddr addr);
hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n);
void virtio_queue_set_num(VirtIODevice *vdev, int n, int num);
int virtio_queue_get_num(VirtIODevice *vdev, int n);
+int virtio_get_num_queues(VirtIODevice *vdev);
void virtio_queue_set_align(VirtIODevice *vdev, int n, int align);
void virtio_queue_notify(VirtIODevice *vdev, int n);
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
--
2.1.4
- [Qemu-devel] [PATCH V8 0/9] Support more virtio queues, Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 1/9] virtio-net: adding all queues in .realize(), Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 2/9] virtio: device_plugged() can fail, Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 3/9] virtio: introduce virtio_get_num_queues(),
Jason Wang <=
- [Qemu-devel] [PATCH V8 4/9] virtio-ccw: introduce ccw specific queue limit, Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 5/9] virtio-ccw: validate the number of queues against bus limitation, Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 6/9] virtio-s390: introduce virito s390 queue limit, Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 7/9] virtio-s390: introduce virtio_s390_device_plugged(), Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 8/9] virtio: rename VIRTIO_PCI_QUEUE_MAX to VIRTIO_QUEUE_MAX, Jason Wang, 2015/05/29
- [Qemu-devel] [PATCH V8 9/9] virtio: increase the queue limit to 1024, Jason Wang, 2015/05/29