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Re: [Qemu-devel] [PATCH 4/4] kvm: i386: Add classic PCI device assignmen


From: Alex Williamson
Subject: Re: [Qemu-devel] [PATCH 4/4] kvm: i386: Add classic PCI device assignment
Date: Mon, 03 Sep 2012 21:31:58 -0600

On Mon, 2012-09-03 at 18:59 +0300, Avi Kivity wrote:
> On 08/29/2012 11:49 AM, Peter Maydell wrote:
> > On 29 August 2012 09:47, Jan Kiszka <address@hidden> wrote:
> >> On 2012-08-28 23:26, Peter Maydell wrote:
> >>> Since this is arch-specific we should probably give the
> >>> resulting device a more specific name than "pci-assign",
> >>> which implies that it is (a) ok for any PCI system and
> >>> (b) not something that will be obsolete in the foreseen
> >>> future.
> >>
> >> The name has to be like this for libvirt compatibility. I can provide it
> >> as alias, though, calling the device "kvm-pci-assign" by default. Better?
> > 
> > ...is it likely to ever work for non-x86 PCI devices?
> 
> It used to work for ia64 before it died.  So it's not architecture
> specific by design.

Caveat; ia64 is a different architecture, but it was on Intel VT-d
chipsets, which therefore supported the IOMMU API and ia64 maps guests
the same way.  This is the same problem I ran into trying to name the
vfio iommu driver for x86.  It's not really x86-specific, but it's got
to look and smell pretty similar.  Thanks,

Alex




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