[kvm-unit-tests PATCH v3 0/4] S390x: CPU Topology Information

[Pierre Morel <pmorel@linux.ibm.com>]

Hi,

new version of the series with corrections.

When facility 11 is available inside the S390x architecture, 2 new
instructions are available: PTF and STSI with function code 15.

Let's check their availability in QEMU/KVM and their coherence
with the CPU topology provided to the QEMU -smp parameter and as
argument for the test.

To run these tests successfully you will need both the Linux and the
QEMU patches, at least the following or newer patches:

    https://lkml.org/lkml/2021/8/3/201

    https://lists.nongnu.org/archive/html/qemu-s390x/2021-07/msg00165.html

Then if you have the text you can run directly the unit test or directly
start QEMU with:

# ./s390x-run s390x/topology.elf \
	-smp 5,drawers=2,books=3,sockets=4,cores=4,maxcpus=96 \
	-append "-d 2 -b 3 -s 4 -c 4 -m 96"

If you do not have the patches you can still use the test but only with
the first two topology levels like in:

# ./s390x-run s390x/topology.elf \
	-smp 5,sockets=24,cores=4,maxcpus=96 \
	-append "-s 24 -c 4 -m 96"

Of course the declaration of the number of socket and core must be
coherent.

Regards,
Pierre

Pierre Morel (4):
  s390x: lib: Add SCLP toplogy nested level
  s390x: stsi: Define vm_is_kvm to be used in different tests
  s390x: topology: Check the Perform Topology Function
  s390x: topology: Checking Configuration Topology Information

 lib/s390x/sclp.c    |   6 +
 lib/s390x/sclp.h    |   4 +-
 lib/s390x/stsi.h    |  76 ++++++++++
 lib/s390x/vm.c      |  39 +++++
 lib/s390x/vm.h      |   1 +
 s390x/Makefile      |   1 +
 s390x/stsi.c        |  23 +--
 s390x/topology.c    | 346 ++++++++++++++++++++++++++++++++++++++++++++
 s390x/unittests.cfg |   4 +
 9 files changed, 478 insertions(+), 22 deletions(-)
 create mode 100644 lib/s390x/stsi.h
 create mode 100644 s390x/topology.c

-- 
2.27.0

Changelog:

From V2:

- Check if the test in running in KVM
  (Janosch)

- patch on "Simplify stsi_get_fc and move it to library"
  pushed separatly

- replace named level with abstracted topology levels
  to get rid of a possible naming controversy
  (Pierre)

- Better checks and new checks for STSI(15,1,x)
  (Pierre)

From V1:

- Simplify the stsi_get_fc function when pushing it into lib
  (Janosch)

- Simplify PTF inline assembly as PTF instruction does not use RRE
  second argument
  (Claudio)

- Rename Test global name
  (Claudio, Janosch)

- readibility, naming for PTF_REQ_* and removed unused globals
  (Janosch)

- skipping tests which could fail when run on LPAR
  (Janosh)

- Missing prefix_pop
  (Janosch)