int ioinst_handle_msch(CPUS390XState *env, uint64_t reg1, uint32_t ipb) { int cssid, ssid, schid, m; SubchDev *sch; SCHIB *schib; uint64_t addr; int ret = -ENODEV; int cc; hwaddr len = sizeof(*schib); if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { program_interrupt(env, PGM_OPERAND, 2); return -EIO; } trace_ioinst_sch_id("msch", cssid, ssid, schid); addr = decode_basedisp_s(env, ipb); if (addr & 3) { program_interrupt(env, PGM_SPECIFICATION, 2); return -EIO; } schib = s390_cpu_physical_memory_map(env, addr, &len, 0); if (!schib || len != sizeof(*schib)) { program_interrupt(env, PGM_ADDRESSING, 2); cc = -EIO; goto out; } if (!ioinst_schib_valid(schib)) { program_interrupt(env, PGM_OPERAND, 2); cc = -EIO; goto out; } 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; } out: s390_cpu_physical_memory_unmap(env, schib, len, 0); return cc; }