From: Peter Maydell <peter.maydell@xxxxxxxxxx>
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 <peter.maydell@xxxxxxxxxx>
Signed-off-by: Evgeny Voevodin <e.voevodin@xxxxxxxxxxx>
Signed-off-by: KONRAD Frederic <fred.konrad@xxxxxxxxxxxxx>
---
hw/virtio.c | 6 ++++++
hw/virtio.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/hw/virtio.c b/hw/virtio.c
index 6821092..f5faf5c 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -642,6 +642,12 @@ 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 80de375..dcafd13 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -180,6 +180,7 @@ 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);
--
1.7.11.7
_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
