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Re: [Xen-devel] Re: [Xen-users] wiki page on 10G SRIOV

To: "Rose, Gregory V" <gregory.v.rose@xxxxxxxxx>
Subject: Re: [Xen-devel] Re: [Xen-users] wiki page on 10G SRIOV
From: kishore kumar <bodkekumar@xxxxxxxxx>
Date: Mon, 19 Jul 2010 14:59:52 -0700
Cc: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, wangalalei <girl111_2002@xxxxxxxxxxx>, "Byrne, John \(HP Labs\)" <john.l.byrne@xxxxxx>
Delivery-date: Mon, 19 Jul 2010 15:01:35 -0700
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I am using Ethernet Server Adapater X520 - DA2 (E10G42BTDA) Card.
For the Device Id 0x10FB, I was able to see all the 64 Virtual Functions, when I run lspci command.
But when the Device ID started showing 0x10D8, I cannot see any Virtual Functions, when I run lspci command.
On Mon, Jul 19, 2010 at 2:35 PM, Rose, Gregory V <gregory.v.rose@xxxxxxxxx> wrote:

If you have an 82599EB that is using 10D8h for the Virtual Function Device ID then the adapter is a very old, preproduction version or else the correct EEPROM image has been over-written with an invalid image.  The correct Device ID value for an 82599EB virtual function is 10EDh.


- Greg


From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Byrne, John (HP Labs)
Sent: Monday, July 19, 2010 2:22 PM
To: kishore kumar
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; wangalalei; xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] Re: [Xen-users] wiki page on 10G SRIOV


I’m a bit confused with your device IDs. The 10fb device is the PCI id for the physical NIC; the 10d8 device is the SRIOV Virtual Function device created by the driver.  With the latest xen-unstable, I have successfully used this NIC to create and assign the VF devices to HVM guests. The ixgbevf driver, which binds to the VF devices, expects device id 0x10ed. I simply assumed that the driver was not quite up to date and tweaked things to work.  So, if you are just a bit confused, the following might help.


I added the following in my modprobe.d directory to create four VF devices (ixgbe.conf, attached):


options ixgbe max_vfs=4


So, on my machine, I can see the physical NIC and the 4 VFs created.


lspci –n | grep 0a:

0a:00.0 0200: 8086:10fb (rev 01)

0a:10.0 0200: 8086:10d8 (rev 01)

0a:10.2 0200: 8086:10d8 (rev 01)

0a:10.4 0200: 8086:10d8 (rev 01)

0a:10.6 0200: 8086:10d8 (rev 01)


I added the ixgbevf driver to both my dom0 and domUs. While it is a simple tweak to add the device id to the driver, I decided to play with modprobe instead and added the following to my modprobe.d directory in both dom0 and domU (ixgbvevf.conf, attached):


install ixgbevf /sbin/modprobe --ignore-install ixgbevf; echo "0x8086 0x10d8" >/



If you are working with HVM guests, there has to be a patch to  qemu as well. (Attached)  You also have to add “(pci-passthrough-strict-check no)” to your xend-config.sxp. (I don’t think you need the xend-config change for PV guests.)


Then it is simply a matter of adding the VF PCI devices to your domU configurations and configuring the ixgbevf devices in the guests.


Both the ixgbe and ixgbevf drivers will generate random MAC addresses for the devices. What  I wanted to do was to set the MAC addresses for the VF devices in dom0 and then my guests’ networking configuration was much easier. The physical NIC must be up. It doesn’t have to have an IP address, but if it isn’t up the MAC address set in dom0 will be lost. I’ve attached my dom0 rc.local where I set the MAC addresses and assign the devices to pciback.


I can’t swear that this is the best way to do this, but this did work.


John Byrne



From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of kishore kumar
Sent: Monday, July 19, 2010 10:16 AM
To: Pasi Kärkkäinen; xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: wangalalei; xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] Re: [Xen-users] wiki page on 10G SRIOV


Hello Everyone,


I am facing a strange issue with my 10G 82599 PCIe device.


The Device Id has to be 0x10FB for SRIOV to function properly, But all of sudden the Device ID started showing me as 0x10D8, and because of this the SRIOV feature is not working and I cannot assign the Virtual Function to  my guest.


When I did lspci command it is showing me as Intel Corporation Unknown device 10d8 (rev 01).  Previously it was showing me Intel Corporation 82599EB Gigabit Networking with 10FB, and I was able to assign the Virtual Function to my guest.


I googled and found out that the device ID 0x10D8 is a 82599 Unprogrammed device.


Can any one please let me know what is happening here and how to recover back from this?

I am totally blocked for 2 days because of this issue.


Thank You.

On Fri, Jul 16, 2010 at 1:05 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:

On Fri, Jul 16, 2010 at 02:17:30AM +0000, wangalalei wrote:
>    hi all:
>       i read intel 82576 card datasheet,and finding it saying that the 82576
>    can set the vf's bandwidth,
>    but when i test this card,i can not find any parameter to it
>       any one else notice this problem? or anyone knows whether the 82576
>    card can control its vf's bandwidth?

I think bandwidth management is a work-in-progress by Intel..

-- Pasi

>    alaleiwang
>    --------------------------------------------------------------------------
>    Date: Thu, 15 Jul 2010 18:35:57 -0700
>    Subject: Re: [Xen-users] wiki page on 10G SRIOV
>    From: bodkekumar@xxxxxxxxx
>    To: pasik@xxxxxx
>    CC: xen-users@xxxxxxxxxxxxxxxxxxx
>    Yeah, I configured 64 Virtual Functions in DOM-0  and passthru 1 VF to
>    assign it to the guest.  It worked for me.
>    I assign static IP to my guest and tried to ping the remote machine. It
>    worked for me.
>    But I am wondering that ping to DOM-0 from guest makes any sense here?
>    Can you let me know on this?  ping worked though from guest to DOM-0 as
>    well.

>    On Thu, Jul 15, 2010 at 1:11 PM, Pasi KÀrkkÀinen <[1]pasik@xxxxxx>

>    wrote:
>      On Thu, Jun 24, 2010 at 10:56:28AM -0700, kishore kumar wrote:
>      >    Hi All,
>      >
>      >    Can any one please let me know if there is a WIKI page which talks
>      about
>      >    how to configure SRIOV in Xen and use Physical Functions  and
>      Virtual
>      >    Functions ?
>      >
>      >    I searched xen wiki, but could not find.
>      >
>      Each virtual function should be a separate PCI device, so you can
>      passthru
>      them like any other normal PCI device.
>      Did you get it to work?
>      -- Pasi

>    --------------------------------------------------------------------------
>    è**倩+æ**玢+é*®ç®± æ*³èŠ*蜻æ*Ÿå*ºæžž,æ**æ*ºMSNåž®äœ æ**å®*!
>    [2]ç«*å*»äž*蜜ïŒ*

> References
>    Visible links
>    1. mailto:pasik@xxxxxx

>    2. http://3g.msn.cn/


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