[PATCH 0/6] KVM: s390: selftests: Add selftests for KVM exits on s390x

["Aaron M. Brown" <aaronmbr@linux.ibm.com>]

This series adds a selftest for the exits that KVM reports to userspace
on s390x, mainly KVM_EXIT_S390_SIEIC. The existing s390 selftests do not
check what userspace sees when a guest causes an intercept, for example
a DIAG, a SIGP order, a program exception or a wait state.

The tests checks the intercept code, the instruction and program data,
and the register state reported in struct kvm_run.

The series is split so that every patch adds tests on top
of the previous one:

 1: test harness and instruction intercepts (DIAG 0x500 and 0x501)
 2: SIGP stop and program exceptions (addressing, segment translation)
 3: wait state and VM create/destroy
 4: ucontrol helpers, STSI, TSCH and STSCH intercepts
 5: ucontrol storage key (KSS) and immediate_exit
 6: clock comparator interrupt on a ucontrol VM

The ucontrol tests require KVM_CAP_S390_UCONTROL and CAP_SYS_ADMIN, and the
storage key test also requires CPUSTAT_KSS. When one of these is missing,
only the affected tests are skipped, with a reason, and the others
still run.

These tests were co-developed with Nitya Khamar <nkhamar@linux.ibm.com>

Testing: built with "make -C tools/testing/selftests/kvm ARCH=s390" and
ran on a s390x z15 lpar with CONFIG_KVM_S390_UCONTROL=y

 as root:         pass:13 fail:0 skip:0
 as unprivileged: pass:8  fail:0 skip:5 (the five ucontrol tests)

Aaron M. Brown (6):
  KVM: s390: selftests: Add kvm_exit test for instruction intercepts
  KVM: s390: selftests: Add SIGP and program exception tests
  KVM: s390: selftests: Add wait state and VM lifecycle tests
  KVM: s390: selftests: Add ucontrol helpers and instruction tests
  KVM: s390: selftests: Add ucontrol storage key and immediate exit
    tests
  KVM: s390: selftests: Add clock comparator interrupt test

 tools/testing/selftests/kvm/Makefile.kvm      |   1 +
 .../kvm/include/s390/kvm_lifecycle.h          |  43 +
 tools/testing/selftests/kvm/s390/kvm_exit.c   | 835 ++++++++++++++++++
 3 files changed, 879 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/include/s390/kvm_lifecycle.h
 create mode 100644 tools/testing/selftests/kvm/s390/kvm_exit.c


base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
--
2.50.1 (Apple Git-155)