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 "monitor/monitor.h"
  27
  28struct do_nmi_s {
  29    int cpu_index;
  30    Error *err;
  31    bool handled;
  32};
  33
  34static void nmi_children(Object *o, struct do_nmi_s *ns);
  35
  36static int do_nmi(Object *o, void *opaque)
  37{
  38    struct do_nmi_s *ns = opaque;
  39    NMIState *n = (NMIState *) object_dynamic_cast(o, TYPE_NMI);
  40
  41    if (n) {
  42        NMIClass *nc = NMI_GET_CLASS(n);
  43
  44        ns->handled = true;
  45        nc->nmi_monitor_handler(n, ns->cpu_index, &ns->err);
  46        if (ns->err) {
  47            return -1;
  48        }
  49    }
  50    nmi_children(o, ns);
  51
  52    return 0;
  53}
  54
  55static void nmi_children(Object *o, struct do_nmi_s *ns)
  56{
  57    object_child_foreach(o, do_nmi, ns);
  58}
  59
  60void nmi_monitor_handle(int cpu_index, Error **errp)
  61{
  62    struct do_nmi_s ns = {
  63        .cpu_index = cpu_index,
  64        .err = NULL,
  65        .handled = false
  66    };
  67
  68    nmi_children(object_get_root(), &ns);
  69    if (ns.handled) {
  70        error_propagate(errp, ns.err);
  71    } else {
  72        error_setg(errp, QERR_UNSUPPORTED);
  73    }
  74}
  75
  76void inject_nmi(void)
  77{
  78#if defined(TARGET_I386)
  79    CPUState *cs;
  80
  81    CPU_FOREACH(cs) {
  82        X86CPU *cpu = X86_CPU(cs);
  83
  84        if (!cpu->apic_state) {
  85            cpu_interrupt(cs, CPU_INTERRUPT_NMI);
  86        } else {
  87            apic_deliver_nmi(cpu->apic_state);
  88        }
  89    }
  90#else
  91    nmi_monitor_handle(0, NULL);
  92#endif
  93}
  94
  95static const TypeInfo nmi_info = {
  96    .name          = TYPE_NMI,
  97    .parent        = TYPE_INTERFACE,
  98    .class_size    = sizeof(NMIClass),
  99};
 100
 101static void nmi_register_types(void)
 102{
 103    type_register_static(&nmi_info);
 104}
 105
 106type_init(nmi_register_types)
 107