Re: [Xen-devel] [BUG] win2008 guest cannot get ip through sriov

["Hao, Xudong" <xudong.hao@xxxxxxxxx>]

> -----Original Message-----
> From: Roger Pau Monné [mailto:roger.pau@xxxxxxxxxx]
> Sent: Tuesday, November 7, 2017 5:33 PM
> To: Hao, Xudong <xudong.hao@xxxxxxxxx>
> Cc: Julien Grall <julien.grall@xxxxxxxxxx>; Stefano Stabellini
> <sstabellini@xxxxxxxxxx>; Lars Kurth <lars.kurth@xxxxxxxxxx>; Quan Xu
> <quan.xu0@xxxxxxxxx>; Kang, Luwei <luwei.kang@xxxxxxxxx>; Zhang,
> PengtaoX <pengtaox.zhang@xxxxxxxxx>; Julien Grall <julien.grall@xxxxxxx>;
> Jan Beulich <JBeulich@xxxxxxxx>; Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>;
> Anthony PERARD <anthony.perard@xxxxxxxxxx>; Wei Liu <wei.liu2@xxxxxxxxxx>
> Subject: Re: [Xen-devel] [BUG] win2008 guest cannot get ip through sriov
> 
> On Mon, Nov 06, 2017 at 01:04:56AM +0000, Hao, Xudong wrote:
> > > -----Original Message-----
> > > From: Roger Pau Monné [mailto:roger.pau@xxxxxxxxxx]
> > > Sent: Friday, November 3, 2017 7:23 PM
> > > To: Hao, Xudong <xudong.hao@xxxxxxxxx>
> > > Cc: Julien Grall <julien.grall@xxxxxxxxxx>; Stefano Stabellini
> > > <sstabellini@xxxxxxxxxx>; Lars Kurth <lars.kurth@xxxxxxxxxx>; Quan
> > > Xu <quan.xu0@xxxxxxxxx>; Kang, Luwei <luwei.kang@xxxxxxxxx>; Zhang,
> > > PengtaoX <pengtaox.zhang@xxxxxxxxx>; Julien Grall
> > > <julien.grall@xxxxxxx>; Jan Beulich <JBeulich@xxxxxxxx>; Xen-devel
> > > <xen-devel@xxxxxxxxxxxxxxxxxxxx>; Anthony PERARD
> > > <anthony.perard@xxxxxxxxxx>; Wei Liu <wei.liu2@xxxxxxxxxx>
> > > Subject: Re: [Xen-devel] [BUG] win2008 guest cannot get ip through
> > > sriov
> > >
> > > On Fri, Nov 03, 2017 at 01:10:26AM +0000, Hao, Xudong wrote:
> > > >
> > > > > -----Original Message-----
> > > > > From: Julien Grall [mailto:julien.grall@xxxxxxxxxx]
> > > > > Sent: Thursday, November 2, 2017 9:50 PM
> > > > > To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> > > > > Cc: Hao, Xudong <xudong.hao@xxxxxxxxx>; Jan Beulich
> > > > > <JBeulich@xxxxxxxx>; Quan Xu <quan.xu0@xxxxxxxxx>; Lars Kurth
> > > > > <lars.kurth@xxxxxxxxxx>; Wei Liu <wei.liu2@xxxxxxxxxx>; Zhang,
> > > > > PengtaoX <pengtaox.zhang@xxxxxxxxx>; Kang, Luwei
> > > > > <luwei.kang@xxxxxxxxx>; Julien Grall <julien.grall@xxxxxxx>;
> > > > > Anthony PERARD <anthony.perard@xxxxxxxxxx>; Xen-devel <xen-
> > > > > devel@xxxxxxxxxxxxxxxxxxxx>
> > > > > Subject: Re: [Xen-devel] [BUG] win2008 guest cannot get ip
> > > > > through sriov
> > > > >
> > > > > Hi,
> > > > >
> > > > > On 27/10/17 21:16, Stefano Stabellini wrote:
> > > > > > On Fri, 27 Oct 2017, Julien Grall wrote:
> > > > > >> On 27/10/17 08:27, Hao, Xudong wrote:
> > > > > >>> This bug exist much long time, there are many discussion
> > > > > >>> last year but not a solution then. I call out it now because
> > > > > >>> there is a fix in qemu
> > > > > upstream:
> > > > > >>> commit a8036336609d2e184fc3543a4c439c0ba7d7f3a2
> > > > > >>> Author: Roger Pau Monne <roger.pau@xxxxxxxxxx>
> > > > > >>> Date:   Thu Aug 24 16:07:03 2017 +0100
> > > > > >>>
> > > > > >>>       xen/pt: allow QEMU to request MSI unmasking at bind
> > > > > >>> time
> > > > > >>>
> > > > > >>> The fix is not in qemu-xen tree yet, when will qemu-xen sync
> > > > > >>> this fix? Is it possible to catch Xen 4.10's qemu-xen?
> > > > > >>
> > > > > >> I will let Stefano and Anthony providing feedback before
> > > > > >> giving a release-ack here.
> > > > > >
> > > > > > Yes, I think we should backport the commit as it fixes a genuine 
> > > > > > bug.
> > > > > > The backport is not risk-free but it only affects PCI Passthrough.
> > > > > > Also the commit has been in QEMU for 2 months now.
> > > > >
> > > > > Does anyone actually tested it with QEMU Xen tree?
> > > > >
> > > >
> > > > Qemu Xen tree is default which is in Xen source code configuration
> > > > file
> > > Config.mk, I tested it with it.
> > > > QEMU_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/qemu-xen.git
> > >
> > > Can you please make sure you have QEMU commit a80363: xen/pt: allow
> > > QEMU to request MSI unmasking at bind time. AFAICT this is not yet
> > > in the qemu-xen tree.
> > >
> >
> > Roger,
> > Maybe I misunderstood of your question and my last mail confused you.
> Qemu-xen didn't have commit a80363, so I report this issue to ask for sync up
> with qemu upstream. Last mail I mean I usually used Qemu Xen tree to do test,
> and found out this issue.
> 
> Before requesting the backport, have you tested whether it fixes your issues?
> 

Yes, Luwei (Cced) tested it with pass result.


Thanks,
-Xudong

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