void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb) { int cssid, ssid, schid, m; SubchDev *sch; SCHIB schib; uint64_t addr; int ret = -ENODEV; int cc; CPUS390XState *env = &cpu->env; uint8_t ar; addr = decode_basedisp_s(env, ipb, &ar); if (addr & 3) { program_interrupt(env, PGM_SPECIFICATION, 2); return; } if (s390_cpu_virt_mem_read(cpu, addr, ar, &schib, sizeof(schib))) { return; } if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) || !ioinst_schib_valid(&schib)) { program_interrupt(env, PGM_OPERAND, 2); return; } trace_ioinst_sch_id("msch", cssid, ssid, schid); sch = css_find_subch(m, cssid, ssid, schid); if (sch && css_subch_visible(sch)) { ret = css_do_msch(sch, &schib); } switch (ret) { case -ENODEV: cc = 3; break; case -EBUSY: cc = 2; break; case 0: cc = 0; break; default: cc = 1; break; } setcc(cpu, cc); }