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Re: [Qemu-devel] PCI access virtualization
From: |
Mark Williamson |
Subject: |
Re: [Qemu-devel] PCI access virtualization |
Date: |
Thu, 5 Jan 2006 16:25:09 +0000 |
User-agent: |
KMail/1.9.1 |
> I'm wondering if it would be possible to modify QEMU such that VMs could
> access PCI devices on the host system. And, if it would be possible at
> all, how much work this would be.
Sounds doable but would require a fair bit of hacking - I think the idea of
doing this under QEmu came up once before in the 2004/2005 timeframe.
For the record, Intel also implemented Emulation + PCI passthrough for their
SoftSDV project, but that also included extra hardware to allow the virtual
machine to control an entire PCI bus, not just one device. (the goal here
was to have a working IA64 "hardware" platform before IA64 silicon was
available).
> I vaguely heard of a feature present in Xen, which allows to assign PCI
> devices to one of the guests. I understand Xen works different than
> QEMU, but maybe is would be possible to implement something similar.
Yep, Xen 2.0 supports this. Support is currently broken in Xen 3.0 (because
PCI is handled differently) but will be coming back once somebody decides
what approach we should use and implements it.
Cheers,
Mark
>
> Any comments appreciated, thanks in advance.
>
> Bye, Mike
>
>
>
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- [Qemu-devel] PCI access virtualization, Michael Renzmann, 2006/01/05
- Re: [Qemu-devel] PCI access virtualization, Paul Brook, 2006/01/05
- Re: [Qemu-devel] PCI access virtualization, Mark Williamson, 2006/01/05
- Re: [Qemu-devel] PCI access virtualization, Paul Brook, 2006/01/05
- Re: [Qemu-devel] PCI access virtualization, Jim C. Brown, 2006/01/05
- Re: [Qemu-devel] PCI access virtualization, Mark Williamson, 2006/01/05
- Re: [Qemu-devel] PCI access virtualization, Paul Brook, 2006/01/06
- Re: [Qemu-devel] PCI access virtualization, Mark Williamson, 2006/01/06
Re: [Qemu-devel] PCI access virtualization,
Mark Williamson <=