LXR qemu/hw/misc/pvpanic.c

   1/*
   2 * QEMU simulated pvpanic device.
   3 *
   4 * Copyright Fujitsu, Corp. 2013
   5 *
   6 * Authors:
   7 *     Wen Congyang <wency@cn.fujitsu.com>
   8 *     Hu Tao <hutao@cn.fujitsu.com>
   9 *
  10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11 * See the COPYING file in the top-level directory.
  12 *
  13 */
  14
  15#include "qemu/osdep.h"
  16#include "qemu/log.h"
  17#include "qemu/module.h"
  18#include "sysemu/runstate.h"
  19
  20#include "hw/nvram/fw_cfg.h"
  21#include "hw/qdev-properties.h"
  22#include "hw/misc/pvpanic.h"
  23#include "qom/object.h"
  24
  25static void handle_event(int event)
  26{
  27    static bool logged;
  28
  29    if (event & ~(PVPANIC_PANICKED | PVPANIC_CRASHLOADED) && !logged) {
  30        qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event);
  31        logged = true;
  32    }
  33
  34    if (event & PVPANIC_PANICKED) {
  35        qemu_system_guest_panicked(NULL);
  36        return;
  37    }
  38
  39    if (event & PVPANIC_CRASHLOADED) {
  40        qemu_system_guest_crashloaded(NULL);
  41        return;
  42    }
  43}
  44
  45/* return supported events on read */
  46static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size)
  47{
  48    PVPanicState *pvp = opaque;
  49    return pvp->events;
  50}
  51
  52static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val,
  53                                 unsigned size)
  54{
  55    handle_event(val);
  56}
  57
  58static const MemoryRegionOps pvpanic_ops = {
  59    .read = pvpanic_read,
  60    .write = pvpanic_write,
  61    .impl = {
  62        .min_access_size = 1,
  63        .max_access_size = 1,
  64    },
  65};
  66
  67void pvpanic_setup_io(PVPanicState *s, DeviceState *dev, unsigned size)
  68{
  69    memory_region_init_io(&s->mr, OBJECT(dev), &pvpanic_ops, s, "pvpanic", size);
  70}
  71