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 #include "standard-headers/misc/pvpanic.h"
25
handle_event(int event)26 static void handle_event(int event)
27 {
28 static bool logged;
29
30 if (event & ~PVPANIC_EVENTS && !logged) {
31 qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event);
32 logged = true;
33 }
34
35 if (event & PVPANIC_PANICKED) {
36 qemu_system_guest_panicked(NULL);
37 return;
38 }
39
40 if (event & PVPANIC_CRASH_LOADED) {
41 qemu_system_guest_crashloaded(NULL);
42 return;
43 }
44
45 if (event & PVPANIC_SHUTDOWN) {
46 qemu_system_guest_pvshutdown();
47 return;
48 }
49 }
50
51 /* return supported events on read */
pvpanic_read(void * opaque,hwaddr addr,unsigned size)52 static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size)
53 {
54 PVPanicState *pvp = opaque;
55 return pvp->events;
56 }
57
pvpanic_write(void * opaque,hwaddr addr,uint64_t val,unsigned size)58 static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val,
59 unsigned size)
60 {
61 handle_event(val);
62 }
63
64 static const MemoryRegionOps pvpanic_ops = {
65 .read = pvpanic_read,
66 .write = pvpanic_write,
67 .impl = {
68 .min_access_size = 1,
69 .max_access_size = 1,
70 },
71 };
72
pvpanic_setup_io(PVPanicState * s,DeviceState * dev,unsigned size)73 void pvpanic_setup_io(PVPanicState *s, DeviceState *dev, unsigned size)
74 {
75 memory_region_init_io(&s->mr, OBJECT(dev), &pvpanic_ops, s, "pvpanic", size);
76 }
77