[0/2] target/s390x: Implement Early Exception Recognition

Message

Ilya Leoshkevich March 14, 2023, 11 a.m. UTC

Hi,

Currently loading bad PSW flags does not lead to an exception, which is
not correct. This series fixes this by implementing what PoP calls
"Early Exception Recognition". Since it applies to both loading PSW with
LPSW/LPSWE and to interrupt handling, s390_cpu_set_psw() looks like the
right place for it to be in.

Patch 1 fixes the issue, patch 2 adds a test.

Best regards,
Ilya

Ilya Leoshkevich (2):
  target/s390x: Implement Early Exception Recognition
  tests/tcg/s390x: Add early-exception-recognition.S

 target/s390x/cpu.c                            | 26 +++++++++++++
 target/s390x/cpu.h                            |  1 +
 target/s390x/tcg/excp_helper.c                |  3 +-
 tests/tcg/s390x/Makefile.softmmu-target       |  1 +
 tests/tcg/s390x/early-exception-recognition.S | 38 +++++++++++++++++++
 5 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 tests/tcg/s390x/early-exception-recognition.S