Comment 18 for bug 1722313

Verified on xenial on a P8 and a z13 zlpar.

From P8:
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

$ uname -a
Linux xxxx 4.4.0-87-generic #110-Ubuntu SMP Tue Jul 18 12:53:44 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux

$ dpkg -l | grep util-linux
ii util-linux 2.27.1-6ubuntu3.4 ppc64el miscellaneous system utilities

resulting log message, after altering system clock,

type=USYS_CONFIG msg=audit(1512153890.632:29): pid=26156 uid=0 auid=1000 ses=998 msg='changing system time exe="/sbin/hwclock" hostname=? addr=? terminal=pts/0 res=success'

--------------------

Test on z-13 zlpar,

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

uname -a
Linux xxxx 4.4.0-1002-fips #2-Ubuntu SMP Thu Apr 27 19:35:14 UTC 2017 s390x s390x s390x GNU/Linux

ubuntu@s1lp12:~$ dpkg -l | grep util-linux
ii util-linux 2.27.1-6ubuntu3.4 s390x miscellaneous system utilities

$ /usr/bin/sudo hwclock --set --date "1/1/2000 00:00:00"
hwclock: Cannot access the Hardware Clock via any known method.
hwclock: Use the --debug option to see the details of our search for an access method.

This is correct behaviour since zlpar cannot access the hw clock and is consistent with prior versions.

message logged indicates the failure,
type=USYS_CONFIG msg=audit(1512154473.517:12321): pid=84471 uid=0 auid=1000 ses=1134 msg='changing system time exe="/sbin/hwclock" hostname=? addr=? terminal=pts/1 res=failed'