1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* ITS base class for a GICv3-based system
*
* Copyright (c) 2015 Samsung Electronics Co., Ltd.
* Written by Pavel Fedin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/pci/msi.h"
#include "migration/vmstate.h"
#include "hw/intc/arm_gicv3_its_common.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "sysemu/kvm.h"
static int gicv3_its_pre_save(void *opaque)
{
GICv3ITSState *s = (GICv3ITSState *)opaque;
GICv3ITSCommonClass *c = ARM_GICV3_ITS_COMMON_GET_CLASS(s);
if (c->pre_save) {
c->pre_save(s);
}
return 0;
}
static int gicv3_its_post_load(void *opaque, int version_id)
{
GICv3ITSState *s = (GICv3ITSState *)opaque;
GICv3ITSCommonClass *c = ARM_GICV3_ITS_COMMON_GET_CLASS(s);
if (c->post_load) {
c->post_load(s);
}
return 0;
}
static const VMStateDescription vmstate_its = {
.name = "arm_gicv3_its",
.pre_save = gicv3_its_pre_save,
.post_load = gicv3_its_post_load,
.priority = MIG_PRI_GICV3_ITS,
.fields = (VMStateField[]) {
VMSTATE_UINT32(ctlr, GICv3ITSState),
VMSTATE_UINT32(iidr, GICv3ITSState),
VMSTATE_UINT64(cbaser, GICv3ITSState),
VMSTATE_UINT64(cwriter, GICv3ITSState),
VMSTATE_UINT64(creadr, GICv3ITSState),
VMSTATE_UINT64_ARRAY(baser, GICv3ITSState, 8),
VMSTATE_END_OF_LIST()
},
};
static MemTxResult gicv3_its_trans_read(void *opaque, hwaddr offset,
uint64_t *data, unsigned size,
MemTxAttrs attrs)
{
qemu_log_mask(LOG_GUEST_ERROR, "ITS read at offset 0x%"PRIx64"\n", offset);
*data = 0;
return MEMTX_OK;
}
static MemTxResult gicv3_its_trans_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size,
MemTxAttrs attrs)
{
if (offset == 0x0040 && ((size == 2) || (size == 4))) {
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(opaque);
GICv3ITSCommonClass *c = ARM_GICV3_ITS_COMMON_GET_CLASS(s);
int ret = c->send_msi(s, le64_to_cpu(value), attrs.requester_id);
if (ret <= 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"ITS: Error sending MSI: %s\n", strerror(-ret));
}
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"ITS write at bad offset 0x%"PRIx64"\n", offset);
}
return MEMTX_OK;
}
static const MemoryRegionOps gicv3_its_trans_ops = {
.read_with_attrs = gicv3_its_trans_read,
.write_with_attrs = gicv3_its_trans_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
void gicv3_its_init_mmio(GICv3ITSState *s, const MemoryRegionOps *ops,
const MemoryRegionOps *tops)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(s);
memory_region_init_io(&s->iomem_its_cntrl, OBJECT(s), ops, s,
"control", ITS_CONTROL_SIZE);
memory_region_init_io(&s->iomem_its_translation, OBJECT(s),
tops ? tops : &gicv3_its_trans_ops, s,
"translation", ITS_TRANS_SIZE);
/* Our two regions are always adjacent, therefore we now combine them
* into a single one in order to make our users' life easier.
*/
memory_region_init(&s->iomem_main, OBJECT(s), "gicv3_its", ITS_SIZE);
memory_region_add_subregion(&s->iomem_main, 0, &s->iomem_its_cntrl);
memory_region_add_subregion(&s->iomem_main, ITS_CONTROL_SIZE,
&s->iomem_its_translation);
sysbus_init_mmio(sbd, &s->iomem_main);
msi_nonbroken = true;
}
static void gicv3_its_common_reset_hold(Object *obj)
{
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(obj);
s->ctlr = 0;
s->cbaser = 0;
s->cwriter = 0;
s->creadr = 0;
s->iidr = 0;
memset(&s->baser, 0, sizeof(s->baser));
}
static void gicv3_its_common_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
rc->phases.hold = gicv3_its_common_reset_hold;
dc->vmsd = &vmstate_its;
}
static const TypeInfo gicv3_its_common_info = {
.name = TYPE_ARM_GICV3_ITS_COMMON,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(GICv3ITSState),
.class_size = sizeof(GICv3ITSCommonClass),
.class_init = gicv3_its_common_class_init,
.abstract = true,
};
static void gicv3_its_common_register_types(void)
{
type_register_static(&gicv3_its_common_info);
}
type_init(gicv3_its_common_register_types)
const char *its_class_name(void)
{
if (kvm_irqchip_in_kernel()) {
return "arm-its-kvm";
} else {
/* Software emulation based model */
return "arm-gicv3-its";
}
}
|
