[kvm-unit-tests PATCH 0/5] s390x: Allocation and hosting environment detection fixes

Janosch Frank
2022-01-14T10:04:02Z

I took some time before Christmas to write a test runner for lpar
which automatically runs all tests and sends me the logs. It's based
on the zhmc library to control starting and stopping of the lpar and
works by having a menu entry for each kvm unit test.

This revealed a number of test fails when the tests are run under lpar
as there are a few differences:
* lpars most often have a very high memory amount (upwards of 8GB)
compared to our qemu env (256MB)
* lpar supports diag308 subcode 2
* lpar does not provide virtio devices

The higher memory amount leads to allocations crossing the 2GB or 4GB
border which made sclp and sigp calls fail that expect 31/32 bit
addresses.

Janosch Frank (5):
lib: s390x: vm: Add kvm and lpar vm queries
s390x: css: Skip if we're not run by qemu
s390x: diag308: Only test subcode 2 under QEMU
s390x: smp: Allocate memory in DMA31 space
s390x: firq: Fix sclp buffer allocation

lib/s390x/vm.c | 39 +++++++++++++++++++++++++++++++++++++++
lib/s390x/vm.h | 23 +++++++++++++++++++++++
s390x/css.c | 10 +++++++++-
s390x/diag308.c | 15 ++++++++++++++-
s390x/firq.c | 2 +-
s390x/smp.c | 4 ++--
s390x/stsi.c | 21 +--------------------
7 files changed, 89 insertions(+), 25 deletions(-)

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2.32.0