On Thu, Aug 11, 2011 at 12:47 PM, Sasha Levin <levinsasha928@xxxxxxxxx> wrote:
> The device uses the virtio preferred method of working with MSI-X by
> creating one vector for configuration and one vector for each vq in the
> device.
>
> Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
> ---
> tools/kvm/virtio/net.c | 56 ++++++++++++++++++++++++++++++++++++++++++++---
> 1 files changed, 52 insertions(+), 4 deletions(-)
>
> diff --git a/tools/kvm/virtio/net.c b/tools/kvm/virtio/net.c
> index e865b7f..e9fe45d 100644
> --- a/tools/kvm/virtio/net.c
> +++ b/tools/kvm/virtio/net.c
> @@ -60,6 +60,9 @@ struct net_dev {
> u8 isr;
> u16 queue_selector;
> u16 base_addr;
> + u32 vq_vector[VIRTIO_NET_NUM_QUEUES];
> + u32 gsis[VIRTIO_NET_NUM_QUEUES];
> + u32 msix_io_block;
>
> pthread_t io_rx_thread;
> pthread_mutex_t io_rx_lock;
> @@ -125,7 +128,8 @@ static void *virtio_net_rx_thread(void *p)
> virt_queue__set_used_elem(vq, head, len);
>
> /* We should interrupt guest right now, otherwise latency is huge. */
> - virt_queue__trigger_irq(vq, pci_header.irq_line, &ndev.isr, kvm);
> + kvm__irq_line(kvm, ndev.gsis[VIRTIO_NET_RX_QUEUE], VIRTIO_IRQ_HIGH);
> + kvm__irq_line(kvm, ndev.gsis[VIRTIO_NET_RX_QUEUE], VIRTIO_IRQ_LOW);
We should probably make a helper function for this HIGH/LOW pair.
kvm__irq_trigger or something?
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