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 | |
24 | /* The bit of supported pv event */ |
25 | #define PVPANIC_F_PANICKED 0 |
26 | |
27 | /* The pv event value */ |
28 | #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) |
29 | |
30 | #define ISA_PVPANIC_DEVICE(obj) \ |
31 | OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC) |
32 | |
33 | static void handle_event(int event) |
34 | { |
35 | static bool logged; |
36 | |
37 | if (event & ~PVPANIC_PANICKED && !logged) { |
38 | qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n" , event); |
39 | logged = true; |
40 | } |
41 | |
42 | if (event & PVPANIC_PANICKED) { |
43 | qemu_system_guest_panicked(NULL); |
44 | return; |
45 | } |
46 | } |
47 | |
48 | #include "hw/isa/isa.h" |
49 | |
50 | typedef struct PVPanicState { |
51 | ISADevice parent_obj; |
52 | |
53 | MemoryRegion io; |
54 | uint16_t ioport; |
55 | } PVPanicState; |
56 | |
57 | /* return supported events on read */ |
58 | static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size) |
59 | { |
60 | return PVPANIC_PANICKED; |
61 | } |
62 | |
63 | static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val, |
64 | unsigned size) |
65 | { |
66 | handle_event(val); |
67 | } |
68 | |
69 | static const MemoryRegionOps pvpanic_ops = { |
70 | .read = pvpanic_ioport_read, |
71 | .write = pvpanic_ioport_write, |
72 | .impl = { |
73 | .min_access_size = 1, |
74 | .max_access_size = 1, |
75 | }, |
76 | }; |
77 | |
78 | static void pvpanic_isa_initfn(Object *obj) |
79 | { |
80 | PVPanicState *s = ISA_PVPANIC_DEVICE(obj); |
81 | |
82 | memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic" , 1); |
83 | } |
84 | |
85 | static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp) |
86 | { |
87 | ISADevice *d = ISA_DEVICE(dev); |
88 | PVPanicState *s = ISA_PVPANIC_DEVICE(dev); |
89 | FWCfgState *fw_cfg = fw_cfg_find(); |
90 | uint16_t *pvpanic_port; |
91 | |
92 | if (!fw_cfg) { |
93 | return; |
94 | } |
95 | |
96 | pvpanic_port = g_malloc(sizeof(*pvpanic_port)); |
97 | *pvpanic_port = cpu_to_le16(s->ioport); |
98 | fw_cfg_add_file(fw_cfg, "etc/pvpanic-port" , pvpanic_port, |
99 | sizeof(*pvpanic_port)); |
100 | |
101 | isa_register_ioport(d, &s->io, s->ioport); |
102 | } |
103 | |
104 | static Property pvpanic_isa_properties[] = { |
105 | DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505), |
106 | DEFINE_PROP_END_OF_LIST(), |
107 | }; |
108 | |
109 | static void pvpanic_isa_class_init(ObjectClass *klass, void *data) |
110 | { |
111 | DeviceClass *dc = DEVICE_CLASS(klass); |
112 | |
113 | dc->realize = pvpanic_isa_realizefn; |
114 | dc->props = pvpanic_isa_properties; |
115 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
116 | } |
117 | |
118 | static TypeInfo pvpanic_isa_info = { |
119 | .name = TYPE_PVPANIC, |
120 | .parent = TYPE_ISA_DEVICE, |
121 | .instance_size = sizeof(PVPanicState), |
122 | .instance_init = pvpanic_isa_initfn, |
123 | .class_init = pvpanic_isa_class_init, |
124 | }; |
125 | |
126 | static void pvpanic_register_types(void) |
127 | { |
128 | type_register_static(&pvpanic_isa_info); |
129 | } |
130 | |
131 | type_init(pvpanic_register_types) |
132 | |