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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/*
* KVM-based ITS implementation for a GICv3-based system
*
* Copyright (c) 2015 Samsung Electronics Co., Ltd.
* Written by Pavel Fedin <p.fedin@samsung.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/intc/arm_gicv3_its_common.h"
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
#include "kvm_arm.h"
#include "migration/blocker.h"
#define TYPE_KVM_ARM_ITS "arm-its-kvm"
#define KVM_ARM_ITS(obj) OBJECT_CHECK(GICv3ITSState, (obj), TYPE_KVM_ARM_ITS)
static int kvm_its_send_msi(GICv3ITSState *s, uint32_t value, uint16_t devid)
{
struct kvm_msi msi;
if (unlikely(!s->translater_gpa_known)) {
MemoryRegion *mr = &s->iomem_its_translation;
MemoryRegionSection mrs;
mrs = memory_region_find(mr, 0, 1);
memory_region_unref(mrs.mr);
s->gits_translater_gpa = mrs.offset_within_address_space + 0x40;
s->translater_gpa_known = true;
}
msi.address_lo = extract64(s->gits_translater_gpa, 0, 32);
msi.address_hi = extract64(s->gits_translater_gpa, 32, 32);
msi.data = le32_to_cpu(value);
msi.flags = KVM_MSI_VALID_DEVID;
msi.devid = devid;
memset(msi.pad, 0, sizeof(msi.pad));
return kvm_vm_ioctl(kvm_state, KVM_SIGNAL_MSI, &msi);
}
/**
* vm_change_state_handler - VM change state callback aiming at flushing
* ITS tables into guest RAM
*
* The tables get flushed to guest RAM whenever the VM gets stopped.
*/
static void vm_change_state_handler(void *opaque, int running,
RunState state)
{
GICv3ITSState *s = (GICv3ITSState *)opaque;
Error *err = NULL;
if (running) {
return;
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
if (err) {
error_report_err(err);
}
}
static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
{
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
Error *local_err = NULL;
s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_ITS, false);
if (s->dev_fd < 0) {
error_setg_errno(errp, -s->dev_fd, "error creating in-kernel ITS");
return;
}
/* explicit init of the ITS */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true, &error_abort);
/* register the base address */
kvm_arm_register_device(&s->iomem_its_cntrl, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_ITS_ADDR_TYPE, s->dev_fd);
gicv3_its_init_mmio(s, NULL);
if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR)) {
error_setg(&s->migration_blocker, "This operating system kernel "
"does not support vITS migration");
migrate_add_blocker(s->migration_blocker, &local_err);
if (local_err) {
error_propagate(errp, local_err);
error_free(s->migration_blocker);
return;
}
} else {
qemu_add_vm_change_state_handler(vm_change_state_handler, s);
}
kvm_msi_use_devid = true;
kvm_gsi_direct_mapping = false;
kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled();
}
/**
* kvm_arm_its_pre_save - handles the saving of ITS registers.
* ITS tables are flushed into guest RAM separately and earlier,
* through the VM change state handler, since at the moment pre_save()
* is called, the guest RAM has already been saved.
*/
static void kvm_arm_its_pre_save(GICv3ITSState *s)
{
int i;
for (i = 0; i < 8; i++) {
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8, &s->baser[i], false,
&error_abort);
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR, &s->ctlr, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER, &s->cbaser, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR, &s->creadr, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER, &s->cwriter, false, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR, &s->iidr, false, &error_abort);
}
/**
* kvm_arm_its_post_load - Restore both the ITS registers and tables
*/
static void kvm_arm_its_post_load(GICv3ITSState *s)
{
int i;
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR, &s->iidr, true, &error_abort);
/*
* must be written before GITS_CREADR since GITS_CBASER write
* access resets GITS_CREADR.
*/
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER, &s->cbaser, true, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR, &s->creadr, true, &error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER, &s->cwriter, true, &error_abort);
for (i = 0; i < 8; i++) {
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8, &s->baser[i], true,
&error_abort);
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_ITS_RESTORE_TABLES, NULL, true,
&error_abort);
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR, &s->ctlr, true, &error_abort);
}
static Property kvm_arm_its_props[] = {
DEFINE_PROP_LINK("parent-gicv3", GICv3ITSState, gicv3, "kvm-arm-gicv3",
GICv3State *),
DEFINE_PROP_END_OF_LIST(),
};
static void kvm_arm_its_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
GICv3ITSCommonClass *icc = ARM_GICV3_ITS_COMMON_CLASS(klass);
dc->realize = kvm_arm_its_realize;
dc->props = kvm_arm_its_props;
icc->send_msi = kvm_its_send_msi;
icc->pre_save = kvm_arm_its_pre_save;
icc->post_load = kvm_arm_its_post_load;
}
static const TypeInfo kvm_arm_its_info = {
.name = TYPE_KVM_ARM_ITS,
.parent = TYPE_ARM_GICV3_ITS_COMMON,
.instance_size = sizeof(GICv3ITSState),
.class_init = kvm_arm_its_class_init,
};
static void kvm_arm_its_register_types(void)
{
type_register_static(&kvm_arm_its_info);
}
type_init(kvm_arm_its_register_types)
|
