From: KY Srinivasan <kys@microsoft.com>
To: Greg KH <gregkh@linuxfoundation.org>
CC: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
        "olaf@aepfle.de" <olaf@aepfle.de>,
        "apw@canonical.com" <apw@canonical.com>,
        "vkuznets@redhat.com" <vkuznets@redhat.com>,
        "jasowang@redhat.com" <jasowang@redhat.com>,
        "leann.ogasawara@canonical.com" <leann.ogasawara@canonical.com>,
        Haiyang Zhang <haiyangz@microsoft.com>
Subject: RE: [PATCH 02/15] hyperv: Add a function to detect hv_device
Thread-Topic: [PATCH 02/15] hyperv: Add a function to detect hv_device
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Date: Fri, 2 Dec 2016 15:38:51 +0000
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> -----Original Message-----
> From: Greg KH [mailto:gregkh@linuxfoundation.org]
> Sent: Thursday, December 1, 2016 11:36 PM
> To: KY Srinivasan <kys@microsoft.com>
> Cc: linux-kernel@vger.kernel.org; devel@linuxdriverproject.org;
> olaf@aepfle.de; apw@canonical.com; vkuznets@redhat.com;
> jasowang@redhat.com; leann.ogasawara@canonical.com; Haiyang Zhang
> <haiyangz@microsoft.com>
> Subject: Re: [PATCH 02/15] hyperv: Add a function to detect hv_device
> 
> On Fri, Dec 02, 2016 at 07:14:03AM +0000, KY Srinivasan wrote:
> > > In other words, why do you need this and PCI or USB doesn't?  Why is
> > > hyperv "special"?
> >
> > On Hyper-V, each VF interface (SR-IOV interface)
> > is paired with an instance of the
> > synthetic interface that is managed by netvsc.
> > When the VF interface comes up, we
> > need to associate the VF instance with
> > the corresponding netvsc instance. To do this
> > without modifying the VF drivers, netvsc registers
> > for netdev events.
> 
> Why not modify the VF drivers?  You have the full source to them...
Greg,

This is even worse. On Linux, VF drivers are hypervisor agnostic
and I want to keep it that way.

Regards,

K. Y