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[Qemu-devel] [RFC 1/4] virtio: Add support for guest setting of queue si
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [RFC 1/4] virtio: Add support for guest setting of queue size |
Date: |
Mon, 14 Nov 2011 14:55:25 +0000 |
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.c | 6 ++++++
hw/virtio.h | 1 +
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/hw/virtio.c b/hw/virtio.c
index 7011b5b..5bd43a1 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -619,6 +619,12 @@ target_phys_addr_t 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/hw/virtio.h b/hw/virtio.h
index 2d18209..352aba6 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -178,6 +178,7 @@ 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, target_phys_addr_t addr);
target_phys_addr_t 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);
--
1.7.1
- [Qemu-devel] [RFC 0/4] virtio-mmio transport, Peter Maydell, 2011/11/14
- [Qemu-devel] [RFC 2/4] virtio: Support transports which can specify the vring alignment, Peter Maydell, 2011/11/14
- [Qemu-devel] [RFC 3/4] Add MMIO based virtio transport, Peter Maydell, 2011/11/14
- [Qemu-devel] [RFC 4/4] hw/vexpress.c: Add MMIO virtio transport, Peter Maydell, 2011/11/14
- [Qemu-devel] [RFC 1/4] virtio: Add support for guest setting of queue size,
Peter Maydell <=
- Re: [Qemu-devel] [RFC 0/4] virtio-mmio transport, Stefan Hajnoczi, 2011/11/14
- Re: [Qemu-devel] [RFC 0/4] virtio-mmio transport, Paolo Bonzini, 2011/11/16