vmxnet3: Use common MAC address tracing macros
[qemu.git] / hw / watchdog / wdt_diag288.c
1 /*
2 * watchdog device diag288 support
3 *
4 * Copyright IBM, Corp. 2015
5 *
6 * Authors:
7 * Xu Wang <gesaint@linux.vnet.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or (at your
10 * option) any later version. See the COPYING file in the top-level directory.
11 *
12 */
13
14 #include "qemu/osdep.h"
15 #include "sysemu/watchdog.h"
16 #include "hw/sysbus.h"
17 #include "qemu/timer.h"
18 #include "hw/watchdog/wdt_diag288.h"
19 #include "qemu/log.h"
20
21 static WatchdogTimerModel model = {
22 .wdt_name = TYPE_WDT_DIAG288,
23 .wdt_description = "diag288 device for s390x platform",
24 };
25
26 static const VMStateDescription vmstate_diag288 = {
27 .name = "vmstate_diag288",
28 .version_id = 0,
29 .minimum_version_id = 0,
30 .fields = (VMStateField[]) {
31 VMSTATE_TIMER_PTR(timer, DIAG288State),
32 VMSTATE_BOOL(enabled, DIAG288State),
33 VMSTATE_END_OF_LIST()
34 }
35 };
36
37 static void wdt_diag288_reset(DeviceState *dev)
38 {
39 DIAG288State *diag288 = DIAG288(dev);
40
41 diag288->enabled = false;
42 timer_del(diag288->timer);
43 }
44
45 static void diag288_reset(void *opaque)
46 {
47 DeviceState *diag288 = opaque;
48
49 wdt_diag288_reset(diag288);
50 }
51
52 static void diag288_timer_expired(void *dev)
53 {
54 qemu_log_mask(CPU_LOG_RESET, "Watchdog timer expired.\n");
55 /* Reset the watchdog only if the guest gets notified about
56 * expiry. watchdog_perform_action() may temporarily relinquish
57 * the BQL; reset before triggering the action to avoid races with
58 * diag288 instructions. */
59 switch (get_watchdog_action()) {
60 case WDT_DEBUG:
61 case WDT_NONE:
62 case WDT_PAUSE:
63 break;
64 default:
65 wdt_diag288_reset(dev);
66 }
67 watchdog_perform_action();
68 }
69
70 static int wdt_diag288_handle_timer(DIAG288State *diag288,
71 uint64_t func, uint64_t timeout)
72 {
73 switch (func) {
74 case WDT_DIAG288_INIT:
75 diag288->enabled = true;
76 /* fall through */
77 case WDT_DIAG288_CHANGE:
78 if (!diag288->enabled) {
79 return -1;
80 }
81 timer_mod(diag288->timer,
82 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
83 timeout * NANOSECONDS_PER_SECOND);
84 break;
85 case WDT_DIAG288_CANCEL:
86 if (!diag288->enabled) {
87 return -1;
88 }
89 diag288->enabled = false;
90 timer_del(diag288->timer);
91 break;
92 default:
93 return -1;
94 }
95
96 return 0;
97 }
98
99 static void wdt_diag288_realize(DeviceState *dev, Error **errp)
100 {
101 DIAG288State *diag288 = DIAG288(dev);
102
103 qemu_register_reset(diag288_reset, diag288);
104 diag288->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, diag288_timer_expired,
105 dev);
106 }
107
108 static void wdt_diag288_unrealize(DeviceState *dev, Error **errp)
109 {
110 DIAG288State *diag288 = DIAG288(dev);
111
112 timer_del(diag288->timer);
113 timer_free(diag288->timer);
114 }
115
116 static void wdt_diag288_class_init(ObjectClass *klass, void *data)
117 {
118 DeviceClass *dc = DEVICE_CLASS(klass);
119 DIAG288Class *diag288 = DIAG288_CLASS(klass);
120
121 dc->realize = wdt_diag288_realize;
122 dc->unrealize = wdt_diag288_unrealize;
123 dc->reset = wdt_diag288_reset;
124 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
125 dc->vmsd = &vmstate_diag288;
126 diag288->handle_timer = wdt_diag288_handle_timer;
127 }
128
129 static const TypeInfo wdt_diag288_info = {
130 .class_init = wdt_diag288_class_init,
131 .parent = TYPE_DEVICE,
132 .name = TYPE_WDT_DIAG288,
133 .instance_size = sizeof(DIAG288State),
134 .class_size = sizeof(DIAG288Class),
135 };
136
137 static void wdt_diag288_register_types(void)
138 {
139 watchdog_add_model(&model);
140 type_register_static(&wdt_diag288_info);
141 }
142
143 type_init(wdt_diag288_register_types)