1 /* 2 * NMI monitor handler class and helpers. 3 * 4 * Copyright IBM Corp., 2014 5 * 6 * Author: Alexey Kardashevskiy <aik@ozlabs.ru> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, 11 * or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #include "hw/nmi.h" 23 #include "qapi/qmp/qerror.h" 24 #include "monitor/monitor.h" 25 26 struct do_nmi_s { 27 int cpu_index; 28 Error *err; 29 bool handled; 30 }; 31 32 static void nmi_children(Object *o, struct do_nmi_s *ns); 33 34 static int do_nmi(Object *o, void *opaque) 35 { 36 struct do_nmi_s *ns = opaque; 37 NMIState *n = (NMIState *) object_dynamic_cast(o, TYPE_NMI); 38 39 if (n) { 40 NMIClass *nc = NMI_GET_CLASS(n); 41 42 ns->handled = true; 43 nc->nmi_monitor_handler(n, ns->cpu_index, &ns->err); 44 if (ns->err) { 45 return -1; 46 } 47 } 48 nmi_children(o, ns); 49 50 return 0; 51 } 52 53 static void nmi_children(Object *o, struct do_nmi_s *ns) 54 { 55 object_child_foreach(o, do_nmi, ns); 56 } 57 58 void nmi_monitor_handle(int cpu_index, Error **errp) 59 { 60 struct do_nmi_s ns = { 61 .cpu_index = cpu_index, 62 .err = NULL, 63 .handled = false 64 }; 65 66 nmi_children(object_get_root(), &ns); 67 if (ns.handled) { 68 error_propagate(errp, ns.err); 69 } else { 70 error_setg(errp, QERR_UNSUPPORTED); 71 } 72 } 73 74 void inject_nmi(void) 75 { 76 #if defined(TARGET_I386) 77 CPUState *cs; 78 79 CPU_FOREACH(cs) { 80 X86CPU *cpu = X86_CPU(cs); 81 82 if (!cpu->apic_state) { 83 cpu_interrupt(cs, CPU_INTERRUPT_NMI); 84 } else { 85 apic_deliver_nmi(cpu->apic_state); 86 } 87 } 88 #else 89 nmi_monitor_handle(0, NULL); 90 #endif 91 } 92 93 static const TypeInfo nmi_info = { 94 .name = TYPE_NMI, 95 .parent = TYPE_INTERFACE, 96 .class_size = sizeof(NMIClass), 97 }; 98 99 static void nmi_register_types(void) 100 { 101 type_register_static(&nmi_info); 102 } 103 104 type_init(nmi_register_types) 105