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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/*
* QEMU TPM Backend
*
* Copyright IBM, Corp. 2013
*
* Authors:
* Stefan Berger <stefanb@us.ibm.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.
*
* Based on backends/rng.c by Anthony Liguori
*/
#include "qemu/osdep.h"
#include "sysemu/tpm_backend.h"
#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/tpm.h"
#include "qemu/thread.h"
#include "qemu/main-loop.h"
static void tpm_backend_request_completed_bh(void *opaque)
{
TPMBackend *s = TPM_BACKEND(opaque);
TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
tic->request_completed(s->tpmif);
}
static void tpm_backend_worker_thread(gpointer data, gpointer user_data)
{
TPMBackend *s = TPM_BACKEND(user_data);
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
assert(k->handle_request != NULL);
k->handle_request(s, (TPMBackendCmd *)data);
qemu_bh_schedule(s->bh);
}
static void tpm_backend_thread_end(TPMBackend *s)
{
if (s->thread_pool) {
g_thread_pool_free(s->thread_pool, FALSE, TRUE);
s->thread_pool = NULL;
}
}
enum TpmType tpm_backend_get_type(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
return k->type;
}
int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp)
{
if (s->tpmif) {
error_setg(errp, "TPM backend '%s' is already initialized", s->id);
return -1;
}
s->tpmif = tpmif;
object_ref(OBJECT(tpmif));
s->had_startup_error = false;
return 0;
}
int tpm_backend_startup_tpm(TPMBackend *s)
{
int res = 0;
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
/* terminate a running TPM */
tpm_backend_thread_end(s);
s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE,
NULL);
res = k->startup_tpm ? k->startup_tpm(s) : 0;
s->had_startup_error = (res != 0);
return res;
}
bool tpm_backend_had_startup_error(TPMBackend *s)
{
return s->had_startup_error;
}
void tpm_backend_deliver_request(TPMBackend *s, TPMBackendCmd *cmd)
{
g_thread_pool_push(s->thread_pool, cmd, NULL);
}
void tpm_backend_reset(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
if (k->reset) {
k->reset(s);
}
tpm_backend_thread_end(s);
s->had_startup_error = false;
}
void tpm_backend_cancel_cmd(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
assert(k->cancel_cmd);
k->cancel_cmd(s);
}
bool tpm_backend_get_tpm_established_flag(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
return k->get_tpm_established_flag ?
k->get_tpm_established_flag(s) : false;
}
int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
return k->reset_tpm_established_flag ?
k->reset_tpm_established_flag(s, locty) : 0;
}
TPMVersion tpm_backend_get_tpm_version(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
assert(k->get_tpm_version);
return k->get_tpm_version(s);
}
TPMInfo *tpm_backend_query_tpm(TPMBackend *s)
{
TPMInfo *info = g_new0(TPMInfo, 1);
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
info->id = g_strdup(s->id);
info->model = tic->model;
if (k->get_tpm_options) {
info->options = k->get_tpm_options(s);
}
return info;
}
static bool tpm_backend_prop_get_opened(Object *obj, Error **errp)
{
TPMBackend *s = TPM_BACKEND(obj);
return s->opened;
}
void tpm_backend_open(TPMBackend *s, Error **errp)
{
object_property_set_bool(OBJECT(s), true, "opened", errp);
}
static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp)
{
TPMBackend *s = TPM_BACKEND(obj);
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
Error *local_err = NULL;
if (value == s->opened) {
return;
}
if (!value && s->opened) {
error_setg(errp, QERR_PERMISSION_DENIED);
return;
}
if (k->opened) {
k->opened(s, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
s->opened = true;
}
static void tpm_backend_instance_init(Object *obj)
{
TPMBackend *s = TPM_BACKEND(obj);
object_property_add_bool(obj, "opened",
tpm_backend_prop_get_opened,
tpm_backend_prop_set_opened,
NULL);
s->bh = qemu_bh_new(tpm_backend_request_completed_bh, s);
}
static void tpm_backend_instance_finalize(Object *obj)
{
TPMBackend *s = TPM_BACKEND(obj);
object_unref(OBJECT(s->tpmif));
g_free(s->id);
tpm_backend_thread_end(s);
qemu_bh_delete(s->bh);
}
static const TypeInfo tpm_backend_info = {
.name = TYPE_TPM_BACKEND,
.parent = TYPE_OBJECT,
.instance_size = sizeof(TPMBackend),
.instance_init = tpm_backend_instance_init,
.instance_finalize = tpm_backend_instance_finalize,
.class_size = sizeof(TPMBackendClass),
.abstract = true,
};
static const TypeInfo tpm_if_info = {
.name = TYPE_TPM_IF,
.parent = TYPE_INTERFACE,
.class_size = sizeof(TPMIfClass),
};
static void register_types(void)
{
type_register_static(&tpm_backend_info);
type_register_static(&tpm_if_info);
}
type_init(register_types);
|
