On 10/10/10 16:11, Avi Kivity wrote:
On 10/06/2010 05:59 PM, Ian Molton wrote:
This patch implements a virtio-based transport for use by a
virtualised OpenGL passthrough implementation.
The libGL and qemu-gl code to support this patch are available here:
http://gitorious.org/vm-gl-accel/qemu-gl
http://gitorious.org/vm-gl-accel/qemu-libgl
Comments please!
1. copy qemu-devel
Ok, will do.
an virtualization@, many virtio developers live there.
you mean virtualizat...@lists.osdl.org ?
2. should start with a patch to the virtio-pci spec to document what
you're doing
Where can I find that spec?
+ /* Transfer data */
+ if (virtqueue_add_buf(vq, sg_list, o_page, i_page, (void *)1)>= 0) {
+ virtqueue_kick(vq);
+ /* Chill out until it's done with the buffer. */
+ while (!virtqueue_get_buf(vq,&count))
+ cpu_relax();
+ }
+
This is pretty gross, and will burn lots of cpu if the hypervisor
processes the queue asynchronously.
It doesnt, at present... It could be changed fairly easily ithout
breaking anything if that happens though.
-Ian
