[kvm-unit-tests,v2,0/8] Testing SSCH, CSCH and HSCH for errors

Message

Pierre Morel March 25, 2021, 9:38 a.m. UTC

The goal of this series is to test some of the I/O instructions,
SSCH, CSCH and HSCH for errors like invalid parameters, addressing,
timing etc.
We can not test the sending of an instruction before the last instruction
has been proceeded by QEMU due to the QEMU serialization but we can 
check the behavior of an instruction if it is started before the status
of the last instruction is read.

To do this we first separate the waiting for the interruption and the
checking of the IRB and enable the subchannel without an I/O ISC to
avoid interruptions at this subchannel and second, we add an argument
to the routine in charge to check the IRB representing the expected
SCSW control field of the IRB.

We also need several other enhancements to the testing environment:

- definitions for the SCSW control bits
- a new function to disable a subchannel
- a macro to simplify skiping tests when no device is present
  (I know the warning about return in macro, can we accept it?)

In the new tests we assume that all the test preparation is working and
use asserts for all function for which we do not expect a failure.

regards,
Pierre


Pierre Morel (8):
  s390x: lib: css: disabling a subchannel
  s390x: lib: css: SCSW bit definitions
  s390x: css: simplify skipping tests on no device
  s390x: lib: css: separate wait for IRQ and check I/O completion
  s390x: lib: css: add SCSW ctrl expectations to check I/O completion
  s390x: css: testing ssch error response
  s390x: css: testing halt subchannel
  s390x: css: testing clear subchannel

 lib/s390x/css.h     |  35 +++++-
 lib/s390x/css_lib.c | 104 ++++++++++++++++--
 s390x/css.c         | 251 ++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 363 insertions(+), 27 deletions(-)