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From: | Ian Molton |
Subject: | [Qemu-devel] Re: [PATCH] Implement a virtio GPU transport |
Date: | Tue, 19 Oct 2010 11:31:54 +0100 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.12) Gecko/20100917 Icedove/3.0.8 |
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 address@hidden ?
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
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