linux-kernel - Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC

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Message-ID: <20151022155234-mutt-send-email-mst@redhat.com>
Date:	Thu, 22 Oct 2015 15:55:34 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Lan Tianyu <tianyu.lan@...el.com>
Cc:	bhelgaas@...gle.com, carolyn.wyborny@...el.com,
	donald.c.skidmore@...el.com, eddie.dong@...el.com,
	nrupal.jani@...el.com, yang.z.zhang@...el.com, agraf@...e.de,
	kvm@...r.kernel.org, pbonzini@...hat.com, qemu-devel@...gnu.org,
	emil.s.tantilov@...el.com, intel-wired-lan@...ts.osuosl.org,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	john.ronciak@...el.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, matthew.vick@...el.com,
	mitch.a.williams@...el.com, netdev@...r.kernel.org,
	shannon.nelson@...el.com
Subject: Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support
 for SRIOV NIC

On Thu, Oct 22, 2015 at 12:37:32AM +0800, Lan Tianyu wrote:
> This patchset is to propose a new solution to add live migration support for 82599
> SRIOV network card.
> 
> Im our solution, we prefer to put all device specific operation into VF and
> PF driver and make code in the Qemu more general.

Adding code to VF driver makes sense.  However, adding code to PF driver
is problematic: PF and VF run within different environments, you can't
assume PF and VF drivers are the same version.

I guess that would be acceptable if these messages make
it into the official intel spec, along with
hardware registers.

-- 
MST
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