Re: Hacking QEMU/KVM to use unused graphics adapters

[Laurent Vivier <Laurent.Vivier-6ktuUTfB/bM@public.gmane.org>]

[-- Attachment #1.1: Type: text/plain, Size: 1551 bytes --]

Dor Laor wrote:
> Laurent Vivier wrote:
>>
>> Anthony de Almeida Lopes wrote:
>> > I was curious if anyone thinks that it may be possible to get a
>> > KVM-patched QEMU to use a real video card? For example, let's say I had
>> > a second video card. Is QEMU/kvm a codebase which would support hacking
>> > in the ability to utilize this second video card (one not utilized by
>> > the host Linux)? And in the situation of a laptop, would it be possible
>> > to boot the host Linux in a way that it would not utilize the video
>> > card, but get a qemu guest to use it?
>> > Theoretically, there's no reason this isn't possible, right?
>>
>> We need something like a "PCI proxy" allowing to route some I/O to
>> virtual PCI
>> devices and others to real PCI devices. Moreover we must be able to
>> inform host
>> kernel to not manage a given PCI card (or be able to hot unplug it
>> from host
>> kernel PCI structures)
>>
> There is work in progress for pci pass through capability. Besides PCI it
> also required to have pv dma or 1-1 mapping between the guest and the host.
> Both will be released in the following month. NIC pass through works but
> I'm
> not sure about the features required from VGA pass through.
> Dor.

Perhaps if we use host IOMMU we don't need pv DMA ?
How do you say to host to not manage a PCI devices and let the guest managing it ?

Laurent
-- 
---------------- Laurent.Vivier-6ktuUTfB/bM@public.gmane.org  -----------------
"Given enough eyeballs, all bugs are shallow" E. S. Raymond


[-- Attachment #1.2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

[-- Attachment #2: Type: text/plain, Size: 314 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/

[-- Attachment #3: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel