hw/core/nmi.c

   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
  25 struct do_nmi_s {
  26     int cpu_index;
  27     Error *errp;
  28     bool handled;
  29 };
  30
  31 static void nmi_children(Object *o, struct do_nmi_s *ns);
  32
  33 static int do_nmi(Object *o, void *opaque)
  34 {
  35     struct do_nmi_s *ns = opaque;
  36     NMIState *n = (NMIState *) object_dynamic_cast(o, TYPE_NMI);
  37
  38     if (n) {
  39         NMIClass *nc = NMI_GET_CLASS(n);
  40
  41         ns->handled = true;
  42         nc->nmi_monitor_handler(n, ns->cpu_index, &ns->errp);
  43         if (ns->errp) {
  44             return -1;
  45         }
  46     }
  47     nmi_children(o, ns);
  48
  49     return 0;
  50 }
  51
  52 static void nmi_children(Object *o, struct do_nmi_s *ns)
  53 {
  54     object_child_foreach(o, do_nmi, ns);
  55 }
  56
  57 void nmi_monitor_handle(int cpu_index, Error **errp)
  58 {
  59     struct do_nmi_s ns = {
  60         .cpu_index = cpu_index,
  61         .errp = NULL,
  62         .handled = false
  63     };
  64
  65     nmi_children(object_get_root(), &ns);
  66     if (ns.handled) {
  67         error_propagate(errp, ns.errp);
  68     } else {
  69         error_set(errp, QERR_UNSUPPORTED);
  70     }
  71 }
  72
  73 static const TypeInfo nmi_info = {
  74     .name          = TYPE_NMI,
  75     .parent        = TYPE_INTERFACE,
  76     .class_size    = sizeof(NMIClass),
  77 };
  78
  79 static void nmi_register_types(void)
  80 {
  81     type_register_static(&nmi_info);
  82 }
  83
  84 type_init(nmi_register_types)