From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: pci passthrough - VF reset at boot is dropping assigned MAC Date: Mon, 25 Apr 2011 12:04:30 -0600 Message-ID: <4DB5B7AE.8010900@gmail.com> References: <4DB5A13B.4050804@gmail.com> <1303749455.3431.21.camel@x201> <4DB5A44F.6040304@gmail.com> <1303752659.3431.31.camel@x201> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: KVM mailing list To: Alex Williamson Return-path: Received: from mail-px0-f179.google.com ([209.85.212.179]:40092 "EHLO mail-px0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754005Ab1DYSEd (ORCPT ); Mon, 25 Apr 2011 14:04:33 -0400 Received: by pxi2 with SMTP id 2so1994778pxi.10 for ; Mon, 25 Apr 2011 11:04:33 -0700 (PDT) In-Reply-To: <1303752659.3431.31.camel@x201> Sender: kvm-owner@vger.kernel.org List-ID: On 04/25/11 11:30, Alex Williamson wrote: > # modprobe -r igbvf > # ip link set eth2 vf 6 mac 02:00:10:91:73:01 > # modprobe igbvf > # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:" > igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7 > igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > # modprobe -r igbvf > # echo 1 > /sys/bus/pci/devices/0000:01:11.5/reset > # modprobe igbvf > # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:" > igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7 > igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > > So now it sticks. You're going to get random mac addresses on the VFs > every time you reload the igb driver (ie. ever boot) anyway (at least > with these sr-iov cards), so if you need consistent macs, they probably > need to be set before launching the VM anyway. Thanks, > > Alex > Ok, I was able to repeat the above commands from the host command line. However, when qemu-kvm starts the MAC is reset. # ip link show | less 2: eth2: mtu 1500 qdisc mq state UP qlen 1000 link/ether 00:1b:21:98:b7:10 brd ff:ff:ff:ff:ff:ff vf 0 MAC 02:12:34:56:80:20 --> that's the MAC address I set I start qemu-kvm (unpatched version) and the host side sees the address changed: # ip link show | less 2: eth2: mtu 1500 qdisc mq state UP qlen 1000 link/ether 00:1b:21:98:b7:10 brd ff:ff:ff:ff:ff:ff vf 0 MAC 7a:17:3f:98:0f:db Can you try that aspect on your end - seeing if the MAC address maintains after starting qemu-kvm? David