linux-kernel - Re: [PATCH v10 0/7] PCI: Linux kernel SR-IOV support

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Message-ID: <20090308150109.GM25995@parisc-linux.org>
Date:	Sun, 8 Mar 2009 09:01:09 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Avi Kivity <avi@...hat.com>
Cc:	Yu Zhao <yu.zhao@...el.com>, jbarnes@...tuousgeek.org,
	linux-pci@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, "Yang, Sheng" <sheng.yang@...el.com>
Subject: Re: [PATCH v10 0/7] PCI: Linux kernel SR-IOV support

On Sun, Mar 08, 2009 at 04:30:16PM +0200, Avi Kivity wrote:
> Matthew Wilcox wrote:
> >On Tue, Feb 24, 2009 at 12:47:38PM +0200, Avi Kivity wrote:
> >>Do those patches allow using a VF on the host (in other words, does the 
> >>kernel emulate config space accesses)?
> >
> >SR-IOV hardware handles config space accesses to virtual functions.  No
> >kernel changes needed for that aspect of it.
> 
> Patches 2 and 3 of the patchset that enables SR/IOV in kvm [1] suggest 
> that at the config space is only partially implemented.
> 
> [1] http://thread.gmane.org/gmane.comp.emulators.kvm.devel/29034

I believe Red Hat are now members of the PCI SIG, you really should
download the SR-IOV spec that Yu Zhao keeps pointing at.  It's going to
be very hard to have a sensible discussion if you haven't read it.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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