LXR qemu/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 "qemu/osdep.h"
  23#include "hw/nmi.h"
  24#include "qapi/error.h"
  25#include "qapi/qmp/qerror.h"
  26#include "qemu/module.h"
  27#include "monitor/monitor.h"
  28
  29struct do_nmi_s {
  30    int cpu_index;
  31    Error *err;
  32    bool handled;
  33};
  34
  35static void nmi_children(Object *o, struct do_nmi_s *ns);
  36
  37static int do_nmi(Object *o, void *opaque)
  38{
  39    struct do_nmi_s *ns = opaque;
  40    NMIState *n = (NMIState *) object_dynamic_cast(o, TYPE_NMI);
  41
  42    if (n) {
  43        NMIClass *nc = NMI_GET_CLASS(n);
  44
  45        ns->handled = true;
  46        nc->nmi_monitor_handler(n, ns->cpu_index, &ns->err);
  47        if (ns->err) {
  48            return -1;
  49        }
  50    }
  51    nmi_children(o, ns);
  52
  53    return 0;
  54}
  55
  56static void nmi_children(Object *o, struct do_nmi_s *ns)
  57{
  58    object_child_foreach(o, do_nmi, ns);
  59}
  60
  61void nmi_monitor_handle(int cpu_index, Error **errp)
  62{
  63    struct do_nmi_s ns = {
  64        .cpu_index = cpu_index,
  65        .err = NULL,
  66        .handled = false
  67    };
  68
  69    nmi_children(object_get_root(), &ns);
  70    if (ns.handled) {
  71        error_propagate(errp, ns.err);
  72    } else {
  73        error_setg(errp, QERR_UNSUPPORTED);
  74    }
  75}
  76
  77static const TypeInfo nmi_info = {
  78    .name          = TYPE_NMI,
  79    .parent        = TYPE_INTERFACE,
  80    .class_size    = sizeof(NMIClass),
  81};
  82
  83static void nmi_register_types(void)
  84{
  85    type_register_static(&nmi_info);
  86}
  87
  88type_init(nmi_register_types)
  89