[kvm-unit-tests,v7,0/2] S390x: CPU Topology Information

Message

Pierre Morel March 20, 2023, 8:56 a.m. UTC

Hi,

new version of the kvm-unit-test s390x CPU topology series.

0. what is new in this new spin
-------------------------------

- Running the test on LPAR has been getestet on a46lp21
- splitting big functions in small ones
- better tests, reset before test
- Diverse rephrasing and functions reordering

1. what is done
---------------

- First part is checking PTF errors, for KVM and LPAR

- Second part is checking PTF polarization change and STSI
  with the cpu topology including drawers and books.
  This tests are run for KVM only.

To run these tests under KVM successfully you need Linux 6.0
and the QEMU patches you find at:

https://lists.gnu.org/archive/html/qemu-devel/2023-02/msg00081.html

Note that Fedora-35 already has the CPU Topology backport for Linux.

To start the test in KVM just do:

# ./run_tests.sh topology

or something like:

# ./s390x-run s390x/topology.elf \
	-smp 5,drawers=3,books=3,sockets=4,cores=4,maxcpus=144 \
	-append '-drawers 3 -books 3 -sockets 4 -cores 4'

Of course the declaration of the number of socket and core must be
coherent in -smp and -append arguments.


To start the tests in LPAR you need to define the loader entry.
For example, under RedHat:

	title topology
	version topology.bin
	linux /boot/topology.bin
	initrd /boot/initramfs-topology.bin.img
	options -drawers 4 -books 4 -sockets 2 -cores 8
	id rhel-0-topology.bin
	grub_users $grub_users
	grub_arg --unrestricted
	grub_class kernel

Output of the test is done on the SCLP console.

Regards,
Pierre

Pierre Morel (2):
  s390x: topology: Check the Perform Topology Function
  s390x: topology: Checking Configuration Topology Information

 lib/s390x/sclp.c    |   5 +
 lib/s390x/sclp.h    |   4 +-
 lib/s390x/stsi.h    |  36 ++++
 s390x/Makefile      |   1 +
 s390x/topology.c    | 471 ++++++++++++++++++++++++++++++++++++++++++++
 s390x/unittests.cfg |  11 ++
 6 files changed, 527 insertions(+), 1 deletion(-)
 create mode 100644 s390x/topology.c