[Bug 1799696] Re: [19.04 FEAT] Valgrind z13 support

[Dimitri John Ledkov]

A basic valgrind trace does not appear to be working in qemu-kvm VM
anymore in disco-proposed:

autopkgtest [00:46:19]: test command1: valgrind /bin/true
autopkgtest [00:46:19]: test command1: [-----------------------
==1206== Memcheck, a memory error detector
==1206== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==1206== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==1206== Command: /bin/true
==1206== 
==1206== Emulation fatal error -- Valgrind cannot continue:
==1206==   Encountered an instruction that requires the vector facility.
==1206==   That facility is not available on this host
==1206==    at 0x4015980: _dl_runtime_resolve_vx (dl-trampoline.h:82)
==1206==    by 0x482960D: ??? (in /usr/lib/s390x-linux-gnu/valgrind/vgpreload_core-s390x-linux.so)
==1206== 
==1206== Valgrind has to exit now.  Sorry.
==1206== 

I will check the cpu settings that we use in these VMs, and/or if
anything needs to be adjusted on the LPARs. Ideally I was expecting
/bin/true, and valgrind /bin/true to just work on zEC12 and up; with or
without vector instructions in Qemu KVM.

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https://bugs.launchpad.net/bugs/1799696

Title:
  [19.04 FEAT] Valgrind z13 support

Status in Ubuntu on IBM z Systems:
  Confirmed
Status in valgrind package in Ubuntu:
  Fix Committed

Bug description:
  Function:
  Provide support for the instructions introduced with IBM z13, e.g. SIMD in the Valgrind debugging infrastructure.

  
  Available with valgrind 3.14.0 + 2 patch2

  Addl. 
  - floating point vector support (https://bugs.kde.org/show_bug.cgi?id=385411) 
  - gdb server intergration support (https://bugs.kde.org/show_bug.cgi?id=397187).
  need to be applied , which is upstream committed for 3.15
  completing this item

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