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eec3d2ad HT |
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 | ||
0d1c9782 | 15 | #include "qemu/osdep.h" |
eec3d2ad | 16 | #include "qemu/log.h" |
0b8fa32f | 17 | #include "qemu/module.h" |
54d31236 | 18 | #include "sysemu/runstate.h" |
eec3d2ad | 19 | |
10a584b2 | 20 | #include "hw/nvram/fw_cfg.h" |
a27bd6c7 | 21 | #include "hw/qdev-properties.h" |
0d5d8a3a | 22 | #include "hw/misc/pvpanic.h" |
10a584b2 | 23 | |
7dc58dee | 24 | /* The bit of supported pv event, TODO: include uapi header and remove this */ |
eec3d2ad | 25 | #define PVPANIC_F_PANICKED 0 |
7dc58dee | 26 | #define PVPANIC_F_CRASHLOADED 1 |
eec3d2ad HT |
27 | |
28 | /* The pv event value */ | |
29 | #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) | |
7dc58dee | 30 | #define PVPANIC_CRASHLOADED (1 << PVPANIC_F_CRASHLOADED) |
eec3d2ad | 31 | |
eec3d2ad | 32 | #define ISA_PVPANIC_DEVICE(obj) \ |
0d5d8a3a | 33 | OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC) |
eec3d2ad | 34 | |
eec3d2ad HT |
35 | static void handle_event(int event) |
36 | { | |
37 | static bool logged; | |
38 | ||
7dc58dee | 39 | if (event & ~(PVPANIC_PANICKED | PVPANIC_CRASHLOADED) && !logged) { |
eec3d2ad HT |
40 | qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); |
41 | logged = true; | |
42 | } | |
43 | ||
44 | if (event & PVPANIC_PANICKED) { | |
c86f106b | 45 | qemu_system_guest_panicked(NULL); |
eec3d2ad HT |
46 | return; |
47 | } | |
7dc58dee ZP |
48 | |
49 | if (event & PVPANIC_CRASHLOADED) { | |
50 | qemu_system_guest_crashloaded(NULL); | |
51 | return; | |
52 | } | |
eec3d2ad HT |
53 | } |
54 | ||
55 | #include "hw/isa/isa.h" | |
56 | ||
57 | typedef struct PVPanicState { | |
58 | ISADevice parent_obj; | |
59 | ||
60 | MemoryRegion io; | |
61 | uint16_t ioport; | |
62 | } PVPanicState; | |
63 | ||
64 | /* return supported events on read */ | |
65 | static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size) | |
66 | { | |
67 | return PVPANIC_PANICKED; | |
68 | } | |
69 | ||
70 | static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val, | |
71 | unsigned size) | |
72 | { | |
73 | handle_event(val); | |
74 | } | |
75 | ||
76 | static const MemoryRegionOps pvpanic_ops = { | |
77 | .read = pvpanic_ioport_read, | |
78 | .write = pvpanic_ioport_write, | |
79 | .impl = { | |
80 | .min_access_size = 1, | |
81 | .max_access_size = 1, | |
82 | }, | |
83 | }; | |
84 | ||
db895a1e | 85 | static void pvpanic_isa_initfn(Object *obj) |
eec3d2ad | 86 | { |
db895a1e AF |
87 | PVPanicState *s = ISA_PVPANIC_DEVICE(obj); |
88 | ||
3c161542 | 89 | memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1); |
db895a1e AF |
90 | } |
91 | ||
92 | static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp) | |
93 | { | |
94 | ISADevice *d = ISA_DEVICE(dev); | |
eec3d2ad | 95 | PVPanicState *s = ISA_PVPANIC_DEVICE(dev); |
a5d3f640 MA |
96 | FWCfgState *fw_cfg = fw_cfg_find(); |
97 | uint16_t *pvpanic_port; | |
eec3d2ad | 98 | |
a5d3f640 MA |
99 | if (!fw_cfg) { |
100 | return; | |
101 | } | |
eec3d2ad | 102 | |
a5d3f640 | 103 | pvpanic_port = g_malloc(sizeof(*pvpanic_port)); |
fea7d596 | 104 | *pvpanic_port = cpu_to_le16(s->ioport); |
fea7d596 MT |
105 | fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port, |
106 | sizeof(*pvpanic_port)); | |
a5d3f640 MA |
107 | |
108 | isa_register_ioport(d, &s->io, s->ioport); | |
eec3d2ad HT |
109 | } |
110 | ||
111 | static Property pvpanic_isa_properties[] = { | |
309cd62d | 112 | DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505), |
eec3d2ad HT |
113 | DEFINE_PROP_END_OF_LIST(), |
114 | }; | |
115 | ||
116 | static void pvpanic_isa_class_init(ObjectClass *klass, void *data) | |
117 | { | |
118 | DeviceClass *dc = DEVICE_CLASS(klass); | |
eec3d2ad | 119 | |
db895a1e | 120 | dc->realize = pvpanic_isa_realizefn; |
4f67d30b | 121 | device_class_set_props(dc, pvpanic_isa_properties); |
a5d3f640 | 122 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
eec3d2ad HT |
123 | } |
124 | ||
125 | static TypeInfo pvpanic_isa_info = { | |
0d5d8a3a | 126 | .name = TYPE_PVPANIC, |
eec3d2ad HT |
127 | .parent = TYPE_ISA_DEVICE, |
128 | .instance_size = sizeof(PVPanicState), | |
db895a1e | 129 | .instance_init = pvpanic_isa_initfn, |
eec3d2ad HT |
130 | .class_init = pvpanic_isa_class_init, |
131 | }; | |
132 | ||
133 | static void pvpanic_register_types(void) | |
134 | { | |
135 | type_register_static(&pvpanic_isa_info); | |
136 | } | |
137 | ||
138 | type_init(pvpanic_register_types) |