Re: [Xen-users] Live migration of VMs between two Alix APU boards running Debian Jessie & Xen 4.4

[Jan Bakuwel <jan.bakuwel@xxxxxxxxx>]

Hi Kyösti,

On 02/11/16 21:14, Kyösti Mälkki wrote:
>
> On Wed, Nov 2, 2016 at 9:16 AM, Jan Bakuwel <jan.bakuwel@xxxxxxxxx
> <mailto:jan.bakuwel@xxxxxxxxx>> wrote:
>
>     Hi,
>
>     I have two Alix boards running Debian Jessie, stock Xen 4.4 and drbd.
>     I'd like to live migrate VMs between them. They have slightly
>     different
>     CPU's, see below.
>
>
> If those are PC Engines apu2 and apu1 boards, they have nothing to do
> with alix, which is an older product of PC Engines. To say slightly
> different CPUs is understatement, first is CPU silicon only while
> second is SoC with PCIe/USB etc and there's couple generations of
> development between the two.

Alix = finger muscle memory (quite a few more of those passed through
here). So, yes, APU boards of course. I'm happy to go with the lowest
common denominator (ie apu1) so only need to figure out how to mask the
new features of apu2.

>
> Most notably, apu2 has hardware AES acceleration apu1 does not have.
> Could be related to the trouble you see, although I can see CPUID bit
> 57 for AES-NI is masked. I would check AES-NI is really inactive while
> VM is running on apu2.

v8 is the VM running on board 1 (apu2). I don't see the mask taking
effect in the VM and am wondering where I went wrong.

root@v8:~# cpuid -1r
CPU:
   0x00000000 0x00: eax=0x0000000d ebx=0x68747541 ecx=0x444d4163
edx=0x69746e65
   0x00000001 0x00: eax=0x00730f01 ebx=0x02040800 ecx=0x3ed8220b
edx=0x178bfbff
   0x00000002 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x00000003 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x00000005 0x00: eax=0x00000040 ebx=0x00000040 ecx=0x00000003
edx=0x00000000
   0x00000006 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000001
edx=0x00000000
   0x00000007 0x00: eax=0x00000000 ebx=0x00000008 ecx=0x00000000
edx=0x00000000
   0x00000008 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x00000009 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x0000000a 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x0000000c 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x0000000d 0x00: eax=0x00000007 ebx=0x00000240 ecx=0x00000340
edx=0x00000000
   0x0000000d 0x02: eax=0x00000100 ebx=0x00000240 ecx=0x00000000
edx=0x00000000
   0x0000000d 0x3e: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000000 0x00: eax=0x8000001e ebx=0x68747541 ecx=0x444d4163
edx=0x69746e65
   0x80000001 0x00: eax=0x00730f01 ebx=0x00000000 ecx=0x1d4037ff
edx=0x2fd3fbff
   0x80000002 0x00: eax=0x20444d41 ebx=0x342d5847 ecx=0x43543231
edx=0x434f5320
   0x80000003 0x00: eax=0x20202020 ebx=0x20202020 ecx=0x20202020
edx=0x20202020
   0x80000004 0x00: eax=0x20202020 ebx=0x20202020 ecx=0x20202020
edx=0x00202020
   0x80000005 0x00: eax=0xff08ff08 ebx=0xff28ff20 ecx=0x20080140
edx=0x20020140
   0x80000006 0x00: eax=0x21000000 ebx=0x42004200 ecx=0x08008140
edx=0x00000000
   0x80000007 0x00: eax=0x00000000 ebx=0x00000001 ecx=0x00002800
edx=0x000033d9
   0x80000008 0x00: eax=0x00003028 ebx=0x00000000 ecx=0x00003003
edx=0x00000000
   0x80000009 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000000a 0x00: eax=0x00000001 ebx=0x00000008 ecx=0x00000000
edx=0x00001cdf
   0x8000000b 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000000c 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000000d 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000000e 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000000f 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000010 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000011 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000012 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000013 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000014 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000015 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000016 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000017 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000018 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x80000019 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000001a 0x00: eax=0x00000003 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000001b 0x00: eax=0x000000ff ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000001c 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0x8000001d 0x00: eax=0x00000121 ebx=0x01c0003f ecx=0x0000003f
edx=0x00000000
   0x8000001e 0x00: eax=0x00000002 ebx=0x00000002 ecx=0x00000000
edx=0x00000000
   0x80860000 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000
   0xc0000000 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000
edx=0x00000000

kind regards,
Jan

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