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
|
/*
* SGX EPC device
*
* Copyright (C) 2019 Intel Corporation
*
* Authors:
* Sean Christopherson <sean.j.christopherson@intel.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/i386/pc.h"
#include "hw/i386/sgx-epc.h"
#include "hw/mem/memory-device.h"
#include "hw/qdev-properties.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "target/i386/cpu.h"
#include "exec/address-spaces.h"
static Property sgx_epc_properties[] = {
DEFINE_PROP_UINT64(SGX_EPC_ADDR_PROP, SGXEPCDevice, addr, 0),
DEFINE_PROP_UINT32(SGX_EPC_NUMA_NODE_PROP, SGXEPCDevice, node, 0),
DEFINE_PROP_LINK(SGX_EPC_MEMDEV_PROP, SGXEPCDevice, hostmem,
TYPE_MEMORY_BACKEND_EPC, HostMemoryBackendEpc *),
DEFINE_PROP_END_OF_LIST(),
};
static void sgx_epc_get_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
Error *local_err = NULL;
uint64_t value;
value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
visit_type_uint64(v, name, &value, errp);
}
static void sgx_epc_init(Object *obj)
{
object_property_add(obj, SGX_EPC_SIZE_PROP, "uint64", sgx_epc_get_size,
NULL, NULL, NULL);
}
static void sgx_epc_realize(DeviceState *dev, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
X86MachineState *x86ms = X86_MACHINE(pcms);
MemoryDeviceState *md = MEMORY_DEVICE(dev);
SGXEPCState *sgx_epc = &pcms->sgx_epc;
SGXEPCDevice *epc = SGX_EPC(dev);
HostMemoryBackend *hostmem;
const char *path;
if (x86ms->boot_cpus != 0) {
error_setg(errp, "'" TYPE_SGX_EPC "' can't be created after vCPUs,"
"e.g. via -device");
return;
}
if (!epc->hostmem) {
error_setg(errp, "'" SGX_EPC_MEMDEV_PROP "' property is not set");
return;
}
hostmem = MEMORY_BACKEND(epc->hostmem);
if (host_memory_backend_is_mapped(hostmem)) {
path = object_get_canonical_path_component(OBJECT(hostmem));
error_setg(errp, "can't use already busy memdev: %s", path);
return;
}
epc->addr = sgx_epc->base + sgx_epc->size;
memory_region_add_subregion(&sgx_epc->mr, epc->addr - sgx_epc->base,
host_memory_backend_get_memory(hostmem));
host_memory_backend_set_mapped(hostmem, true);
sgx_epc->sections = g_renew(SGXEPCDevice *, sgx_epc->sections,
sgx_epc->nr_sections + 1);
sgx_epc->sections[sgx_epc->nr_sections++] = epc;
sgx_epc->size += memory_device_get_region_size(md, errp);
}
static void sgx_epc_unrealize(DeviceState *dev)
{
SGXEPCDevice *epc = SGX_EPC(dev);
HostMemoryBackend *hostmem = MEMORY_BACKEND(epc->hostmem);
host_memory_backend_set_mapped(hostmem, false);
}
static uint64_t sgx_epc_md_get_addr(const MemoryDeviceState *md)
{
const SGXEPCDevice *epc = SGX_EPC(md);
return epc->addr;
}
static void sgx_epc_md_set_addr(MemoryDeviceState *md, uint64_t addr,
Error **errp)
{
object_property_set_uint(OBJECT(md), SGX_EPC_ADDR_PROP, addr, errp);
}
static uint64_t sgx_epc_md_get_plugged_size(const MemoryDeviceState *md,
Error **errp)
{
return 0;
}
static MemoryRegion *sgx_epc_md_get_memory_region(MemoryDeviceState *md,
Error **errp)
{
SGXEPCDevice *epc = SGX_EPC(md);
HostMemoryBackend *hostmem;
if (!epc->hostmem) {
error_setg(errp, "'" SGX_EPC_MEMDEV_PROP "' property must be set");
return NULL;
}
hostmem = MEMORY_BACKEND(epc->hostmem);
return host_memory_backend_get_memory(hostmem);
}
static void sgx_epc_md_fill_device_info(const MemoryDeviceState *md,
MemoryDeviceInfo *info)
{
SgxEPCDeviceInfo *se = g_new0(SgxEPCDeviceInfo, 1);
SGXEPCDevice *epc = SGX_EPC(md);
se->memaddr = epc->addr;
se->size = object_property_get_uint(OBJECT(epc), SGX_EPC_SIZE_PROP,
NULL);
se->node = object_property_get_uint(OBJECT(epc), SGX_EPC_NUMA_NODE_PROP,
NULL);
se->memdev = object_get_canonical_path(OBJECT(epc->hostmem));
info->u.sgx_epc.data = se;
info->type = MEMORY_DEVICE_INFO_KIND_SGX_EPC;
}
static void sgx_epc_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
dc->hotpluggable = false;
dc->realize = sgx_epc_realize;
dc->unrealize = sgx_epc_unrealize;
dc->desc = "SGX EPC section";
dc->user_creatable = false;
device_class_set_props(dc, sgx_epc_properties);
mdc->get_addr = sgx_epc_md_get_addr;
mdc->set_addr = sgx_epc_md_set_addr;
mdc->get_plugged_size = sgx_epc_md_get_plugged_size;
mdc->get_memory_region = sgx_epc_md_get_memory_region;
mdc->fill_device_info = sgx_epc_md_fill_device_info;
}
static TypeInfo sgx_epc_info = {
.name = TYPE_SGX_EPC,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SGXEPCDevice),
.instance_init = sgx_epc_init,
.class_init = sgx_epc_class_init,
.class_size = sizeof(DeviceClass),
.interfaces = (InterfaceInfo[]) {
{ TYPE_MEMORY_DEVICE },
{ }
},
};
static void sgx_epc_register_types(void)
{
type_register_static(&sgx_epc_info);
}
type_init(sgx_epc_register_types)
|
