MC requires bit positions 8-11 (upper 4 bits of class) to be zeros, otherwise it must raise a specification exception.
Cc: qemu-sta...@nongnu.org Fixes: 20d143e2cab8 ("s390x/tcg: Implement MONITOR CALL") Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com> --- target/s390x/tcg/excp_helper.c | 2 +- target/s390x/tcg/translate.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/target/s390x/tcg/excp_helper.c b/target/s390x/tcg/excp_helper.c index 228aa9f2373..3da337f7c72 100644 --- a/target/s390x/tcg/excp_helper.c +++ b/target/s390x/tcg/excp_helper.c @@ -639,7 +639,7 @@ void monitor_event(CPUS390XState *env, void HELPER(monitor_call)(CPUS390XState *env, uint64_t monitor_code, uint32_t monitor_class) { - g_assert(monitor_class <= 0xff); + g_assert(monitor_class <= 0xf); if (env->cregs[8] & (0x8000 >> monitor_class)) { monitor_event(env, monitor_code, monitor_class, GETPC()); diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index 2d7cc8963b4..4b32c2333c2 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -3184,9 +3184,9 @@ static DisasJumpType op_lcbb(DisasContext *s, DisasOps *o) static DisasJumpType op_mc(DisasContext *s, DisasOps *o) { - const uint16_t monitor_class = get_field(s, i2); + const uint8_t monitor_class = get_field(s, i2); - if (monitor_class & 0xff00) { + if (monitor_class & 0xf0) { gen_program_exception(s, PGM_SPECIFICATION); return DISAS_NORETURN; } -- 2.41.0