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Re: [Qemu-devel] [PATCH] Add -option-rom option to allow loading of PCI

From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH] Add -option-rom option to allow loading of PCI option ROMs
Date: Wed, 27 Dec 2006 11:12:45 -0600
User-agent: Thunderbird (X11/20061115)

Fabrice Bellard wrote:

OK for the -option-rom option. Later it would be better to handle it at the NIC level, but it is more complicated (some BIOS patches would be needed to remap the PCI ROM at the right address for example).


I think the -boot n option should be merged in QEMU too. Some people need it to make tests.

Okay, I'll post that patch.

Regarding VMI, I began some work in this area with kqemu but I did not manage to find time to finish it (VMI in QEMU would enable to run Linux VMs with performance levels close to Xen at the expense of a patched kernel).

I had a VMI ROM working with an older version of VMI. I've got some time this week so I've been trying to do the same thing with the newer VMI spec.

I'd like to at least get a pass through ROM working and then start playing around with stuff like moving some of the device emulation into the ROM. This would be most useful for something like KVM where the PIO latency is a major bottleneck.

Eventually, it would be nice to use it to run the guest in ring 1 on bare metal of course. I do agree that with VMI QEMU should be competitive with Xen.


Anthony Liguori



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