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[Qemu-devel] [PATCH 3/8] virtio: Add support for guest setting of queue
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 3/8] virtio: Add support for guest setting of queue size |
Date: |
Thu, 27 Jun 2013 14:04:10 +0100 |
The MMIO virtio transport spec allows the guest to tell the host how
large the queue size is. Add virtio_queue_set_num() function which
implements this in the QEMU common virtio support code.
Signed-off-by: Peter Maydell <address@hidden>
---
hw/virtio/virtio.c | 6 ++++++
include/hw/virtio/virtio.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 8176c14..8805b8a 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -667,6 +667,12 @@ hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n)
return vdev->vq[n].pa;
}
+void virtio_queue_set_num(VirtIODevice *vdev, int n, int num)
+{
+ vdev->vq[n].vring.num = num;
+ virtqueue_init(&vdev->vq[n]);
+}
+
int virtio_queue_get_num(VirtIODevice *vdev, int n)
{
return vdev->vq[n].vring.num;
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index a6c5c53..95c4772 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -198,6 +198,7 @@ void virtio_config_writew(VirtIODevice *vdev, uint32_t
addr, uint32_t data);
void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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);
void virtio_queue_notify(VirtIODevice *vdev, int n);
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
--
1.7.9.5
- [Qemu-devel] [PATCH 0/8] Add virtio-mmio and use it in vexpress, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 6/8] arm/boot: Allow boards to modify the FDT blob, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 3/8] virtio: Add support for guest setting of queue size,
Peter Maydell <=
- [Qemu-devel] [PATCH 5/8] virtio: Implement MMIO based virtio transport, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 4/8] virtio: Support transports which can specify the vring alignment, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 7/8] vexpress: Make VEDBoardInfo extend arm_boot_info, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 8/8] vexpress: Add virtio-mmio transports, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 1/8] device_tree: Add qemu_devtree_setprop_sized_cells() utility functions, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 2/8] arm/boot: Use qemu_devtree_setprop_sized_cells(), Peter Maydell, 2013/06/27