[PATCH v3 0/6] KVM: s390: interrupt: Fix stepping into interrupt handlers

Ilya Leoshkevich
2023-07-24T09:50:28Z

v2: https://lore.kernel.org/lkml/20230721120046.2262291-1-iii@linux.ibm.com/
v2 -> v3: Add comments, improve the commit messages (Christian, David).
Add R-bs.
Patches that need review: [4/6], [6/6].

v1: https://lore.kernel.org/lkml/20230629083452.183274-1-iii@linux.ibm.com/
v1 -> v2: Fix three more issues.
Add selftests (Claudio).

Hi,

I tried to compare the behavior of KVM and TCG by diffing instruction
traces, and found five issues in KVM related to stepping into interrupt
handlers.

Best regards,
Ilya

Ilya Leoshkevich (6):
KVM: s390: interrupt: Fix single-stepping into interrupt handlers
KVM: s390: interrupt: Fix single-stepping into program interrupt
handlers
KVM: s390: interrupt: Fix single-stepping kernel-emulated instructions
KVM: s390: interrupt: Fix single-stepping userspace-emulated
instructions
KVM: s390: interrupt: Fix single-stepping keyless mode exits
KVM: s390: selftests: Add selftest for single-stepping

arch/s390/kvm/intercept.c | 40 ++++-
arch/s390/kvm/interrupt.c | 14 ++
arch/s390/kvm/kvm-s390.c | 27 ++-
tools/testing/selftests/kvm/Makefile | 1 +
.../testing/selftests/kvm/s390x/debug_test.c | 160 ++++++++++++++++++
5 files changed, 230 insertions(+), 12 deletions(-)
create mode 100644 tools/testing/selftests/kvm/s390x/debug_test.c

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2.41.0