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[Qemu-devel] [PATCH-RFC 05/13] syborg_virtio: add irqfd/eventfd support
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCH-RFC 05/13] syborg_virtio: add irqfd/eventfd support |
Date: |
Mon, 11 Jan 2010 19:19:52 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
No idea if it's right .. and syborg does not support vectors so we won't
get performance gains out of it either - so quite likely it's best to
just keep this patch out of qemu. But just to show what's possible.
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
hw/syborg_virtio.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/hw/syborg_virtio.c b/hw/syborg_virtio.c
index 65239a0..ef6364f 100644
--- a/hw/syborg_virtio.c
+++ b/hw/syborg_virtio.c
@@ -249,9 +249,34 @@ static unsigned syborg_virtio_get_features(void *opaque)
return proxy->host_features;
}
+static void syborg_virtio_irqfd_read(void *opaque)
+{
+ VirtQueue *vq = opaque;
+ virtio_irq(vq->vdev, vq);
+}
+
+static int syborg_virtio_irqfd(void * opaque, int n, int fd, bool assign)
+{
+ SyborgVirtIOProxy *proxy = opaque;
+ VirtQueue *vq = &proxy->vdev->vq[n];
+
+ qemu_set_fd_handler(fd, assign ? syborg_virtio_irqfd_read : NULL, NULL,
vq);
+ return 0;
+}
+
+static int syborg_virtio_queuefd(void * opaque, int n, int fd, bool assign)
+{
+ SyborgVirtIOProxy *proxy = opaque;
+ return kvm_set_ioeventfd(proxy->busdev.mmio[0].addr +
+ SYBORG_VIRTIO_QUEUE_NOTIFY << 2,
+ n, fd, assign);
+}
+
static VirtIOBindings syborg_virtio_bindings = {
.notify = syborg_virtio_update_irq,
.get_features = syborg_virtio_get_features,
+ .set_irqfd = syborg_virtio_irqfd,
+ .set_queuefd = syborg_virtio_queuefd,
};
static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev)
--
1.6.6.rc1.43.gf55cc
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