[Qemu-devel] [Bug 877155] Re: VT-D NIC doesn't work in windows guest

[Yongjie Ren]

>From my test, this bug is fixed in the latest kvm.git.  I tried 82572 NIC for 
>device assignment in WinXP, Win7 and Win2k8. The VT-d NIC works fine in 
>Windows guest.
kvm.git    +    qemu-kvm.git  =  result
f4d1f417  +    df44afac          = bad 
eb9ede96 +    df44afac          = good

But I don't know which exact patch fixed this bug.

** Changed in: qemu
       Status: New => Fix Committed

** Changed in: qemu
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/877155

Title:
  VT-D NIC doesn't work in windows guest

Status in QEMU:
  Fix Released

Bug description:
  [This should be a kvm kernel bug. I met this issue with quemu and kvm for 
virtualization. For https://bugzilla.kernel.org is not available yet, I just 
file this bug here just for tracking. ]
  Environment:
  ------------
  Host OS (ia32/ia32e/IA64):All
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows):Linux
  kvm.git Commit:211978fb6c666f824ae8221baeaeeee7ee28efc1
  qemu.git Commit:edbb7c0de56692868e6126c7ff7e8bf917f8d0e7
  Host Kernel Version:3.1.0-rc9+
  Hardware: Westmere-EP && SandyBridge platform

  Bug detailed description:
  --------------------------
  Using qemu and kvm upstream, VT-D NIC and SR-IOV VF don't work in Windows 
guest.  I tried Windows XP, Vista, Win7, Win2k8 as a guest. And I used 82572 
NIC  and 82576 Virtual Function to assign to windows guest, and got the same 
result. 

  Reproduce steps:
  ----------------
  1.start a Windows guest with a NIC assigned: 
  qemu-system-x86_64 -m 1024 -smp 2 -device pci-assign,host=08:00.0 -net none 
-hda Windows.img
  2.check network in the Windows guest. (You'll find the assigned NIC doesn't 
work in guest.)

  Current result:
  ----------------
  NIC doesn't work in Windows guest

  Expected result:
  ----------------
  NIC will work.

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