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| author | Peter Maydell <peter.maydell@linaro.org> | 2012-01-06 16:44:19 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2012-03-03 21:47:32 +0000 |
| commit | 116364bd8e654646aaf79591077ac0c4b9b7c3fa (patch) | |
| tree | 404a703922fb7806bfadf1f6ffa1b81061816f7d | |
| parent | 41e37c33fc5897ff8015af8e0e3f5eb13c394b51 (diff) | |
| download | qemu-arm-116364bd8e654646aaf79591077ac0c4b9b7c3fa.tar.gz | |
virtio: Add support for guest setting of queue size
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@linaro.org>
| -rw-r--r-- | hw/virtio.c | 6 | ||||
| -rw-r--r-- | hw/virtio.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index 064aecf553..22ea8181c0 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 400c092c95..1f5aa57075 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); |