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Re: [Xen-devel] [BUG] win2008 guest cannot get ip through sriov
 
- To: Anthony PERARD <anthony.perard@xxxxxxxxxx>
 
- From: Julien Grall <julien.grall@xxxxxxxxxx>
 
- Date: Wed, 8 Nov 2017 12:17:43 +0000
 
- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, "Zhang, PengtaoX" <pengtaox.zhang@xxxxxxxxx>, "Hao, Xudong" <xudong.hao@xxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Quan Xu <quan.xu0@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "Kang, Luwei" <luwei.kang@xxxxxxxxx>
 
- Delivery-date: Wed, 08 Nov 2017 12:18:04 +0000
 
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
 
 
 
Hi Anthony,
On 08/11/17 12:13, Anthony PERARD wrote:
 
On Thu, Nov 02, 2017 at 01:49:54PM +0000, Julien Grall wrote:
 
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?
 
 
Yes.  I've tested qemu-xen with this patch and PCI passthrough still
works.
Can I get a release-ack?
 
 
 I'd still like an answer on Roger's question whether this patch fixes 
the issue they met.
Cheers,
--
Julien Grall
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