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12#include "qemu/osdep.h"
13#include "hw/i386/pc.h"
14#include "hw/i386/sgx-epc.h"
15#include "hw/mem/memory-device.h"
16#include "hw/qdev-properties.h"
17#include "qapi/error.h"
18#include "qapi/visitor.h"
19#include "target/i386/cpu.h"
20#include "exec/address-spaces.h"
21
22static Property sgx_epc_properties[] = {
23 DEFINE_PROP_UINT64(SGX_EPC_ADDR_PROP, SGXEPCDevice, addr, 0),
24 DEFINE_PROP_UINT32(SGX_EPC_NUMA_NODE_PROP, SGXEPCDevice, node, 0),
25 DEFINE_PROP_LINK(SGX_EPC_MEMDEV_PROP, SGXEPCDevice, hostmem,
26 TYPE_MEMORY_BACKEND_EPC, HostMemoryBackendEpc *),
27 DEFINE_PROP_END_OF_LIST(),
28};
29
30static void sgx_epc_get_size(Object *obj, Visitor *v, const char *name,
31 void *opaque, Error **errp)
32{
33 Error *local_err = NULL;
34 uint64_t value;
35
36 value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err);
37 if (local_err) {
38 error_propagate(errp, local_err);
39 return;
40 }
41
42 visit_type_uint64(v, name, &value, errp);
43}
44
45static void sgx_epc_init(Object *obj)
46{
47 object_property_add(obj, SGX_EPC_SIZE_PROP, "uint64", sgx_epc_get_size,
48 NULL, NULL, NULL);
49}
50
51static void sgx_epc_realize(DeviceState *dev, Error **errp)
52{
53 PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
54 X86MachineState *x86ms = X86_MACHINE(pcms);
55 MemoryDeviceState *md = MEMORY_DEVICE(dev);
56 SGXEPCState *sgx_epc = &pcms->sgx_epc;
57 SGXEPCDevice *epc = SGX_EPC(dev);
58 HostMemoryBackend *hostmem;
59 const char *path;
60
61 if (x86ms->boot_cpus != 0) {
62 error_setg(errp, "'" TYPE_SGX_EPC "' can't be created after vCPUs,"
63 "e.g. via -device");
64 return;
65 }
66
67 if (!epc->hostmem) {
68 error_setg(errp, "'" SGX_EPC_MEMDEV_PROP "' property is not set");
69 return;
70 }
71 hostmem = MEMORY_BACKEND(epc->hostmem);
72 if (host_memory_backend_is_mapped(hostmem)) {
73 path = object_get_canonical_path_component(OBJECT(hostmem));
74 error_setg(errp, "can't use already busy memdev: %s", path);
75 return;
76 }
77
78 epc->addr = sgx_epc->base + sgx_epc->size;
79
80 memory_region_add_subregion(&sgx_epc->mr, epc->addr - sgx_epc->base,
81 host_memory_backend_get_memory(hostmem));
82
83 host_memory_backend_set_mapped(hostmem, true);
84
85 sgx_epc->sections = g_renew(SGXEPCDevice *, sgx_epc->sections,
86 sgx_epc->nr_sections + 1);
87 sgx_epc->sections[sgx_epc->nr_sections++] = epc;
88
89 sgx_epc->size += memory_device_get_region_size(md, errp);
90}
91
92static void sgx_epc_unrealize(DeviceState *dev)
93{
94 SGXEPCDevice *epc = SGX_EPC(dev);
95 HostMemoryBackend *hostmem = MEMORY_BACKEND(epc->hostmem);
96
97 host_memory_backend_set_mapped(hostmem, false);
98}
99
100static uint64_t sgx_epc_md_get_addr(const MemoryDeviceState *md)
101{
102 const SGXEPCDevice *epc = SGX_EPC(md);
103
104 return epc->addr;
105}
106
107static void sgx_epc_md_set_addr(MemoryDeviceState *md, uint64_t addr,
108 Error **errp)
109{
110 object_property_set_uint(OBJECT(md), SGX_EPC_ADDR_PROP, addr, errp);
111}
112
113static uint64_t sgx_epc_md_get_plugged_size(const MemoryDeviceState *md,
114 Error **errp)
115{
116 return 0;
117}
118
119static MemoryRegion *sgx_epc_md_get_memory_region(MemoryDeviceState *md,
120 Error **errp)
121{
122 SGXEPCDevice *epc = SGX_EPC(md);
123 HostMemoryBackend *hostmem;
124
125 if (!epc->hostmem) {
126 error_setg(errp, "'" SGX_EPC_MEMDEV_PROP "' property must be set");
127 return NULL;
128 }
129
130 hostmem = MEMORY_BACKEND(epc->hostmem);
131 return host_memory_backend_get_memory(hostmem);
132}
133
134static void sgx_epc_md_fill_device_info(const MemoryDeviceState *md,
135 MemoryDeviceInfo *info)
136{
137 SgxEPCDeviceInfo *se = g_new0(SgxEPCDeviceInfo, 1);
138 SGXEPCDevice *epc = SGX_EPC(md);
139
140 se->memaddr = epc->addr;
141 se->size = object_property_get_uint(OBJECT(epc), SGX_EPC_SIZE_PROP,
142 NULL);
143 se->node = object_property_get_uint(OBJECT(epc), SGX_EPC_NUMA_NODE_PROP,
144 NULL);
145 se->memdev = object_get_canonical_path(OBJECT(epc->hostmem));
146
147 info->u.sgx_epc.data = se;
148 info->type = MEMORY_DEVICE_INFO_KIND_SGX_EPC;
149}
150
151static void sgx_epc_class_init(ObjectClass *oc, void *data)
152{
153 DeviceClass *dc = DEVICE_CLASS(oc);
154 MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
155
156 dc->hotpluggable = false;
157 dc->realize = sgx_epc_realize;
158 dc->unrealize = sgx_epc_unrealize;
159 dc->desc = "SGX EPC section";
160 dc->user_creatable = false;
161 device_class_set_props(dc, sgx_epc_properties);
162
163 mdc->get_addr = sgx_epc_md_get_addr;
164 mdc->set_addr = sgx_epc_md_set_addr;
165 mdc->get_plugged_size = sgx_epc_md_get_plugged_size;
166 mdc->get_memory_region = sgx_epc_md_get_memory_region;
167 mdc->fill_device_info = sgx_epc_md_fill_device_info;
168}
169
170static const TypeInfo sgx_epc_info = {
171 .name = TYPE_SGX_EPC,
172 .parent = TYPE_DEVICE,
173 .instance_size = sizeof(SGXEPCDevice),
174 .instance_init = sgx_epc_init,
175 .class_init = sgx_epc_class_init,
176 .class_size = sizeof(DeviceClass),
177 .interfaces = (InterfaceInfo[]) {
178 { TYPE_MEMORY_DEVICE },
179 { }
180 },
181};
182
183static void sgx_epc_register_types(void)
184{
185 type_register_static(&sgx_epc_info);
186}
187
188type_init(sgx_epc_register_types)
189
