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15#include "qemu/osdep.h"
16#include "sysemu/tpm_backend.h"
17#include "qapi/error.h"
18#include "qapi/qmp/qerror.h"
19#include "sysemu/tpm.h"
20#include "hw/tpm/tpm_int.h"
21#include "qemu/thread.h"
22
23static void tpm_backend_worker_thread(gpointer data, gpointer user_data)
24{
25 TPMBackend *s = TPM_BACKEND(user_data);
26 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
27
28 assert(k->handle_request != NULL);
29 k->handle_request(s, (TPMBackendCmd *)data);
30}
31
32static void tpm_backend_thread_end(TPMBackend *s)
33{
34 if (s->thread_pool) {
35 g_thread_pool_free(s->thread_pool, FALSE, TRUE);
36 s->thread_pool = NULL;
37 }
38}
39
40enum TpmType tpm_backend_get_type(TPMBackend *s)
41{
42 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
43
44 return k->type;
45}
46
47int tpm_backend_init(TPMBackend *s, TPMState *state)
48{
49 s->tpm_state = state;
50 s->had_startup_error = false;
51
52 return 0;
53}
54
55int tpm_backend_startup_tpm(TPMBackend *s)
56{
57 int res = 0;
58 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
59
60
61 tpm_backend_thread_end(s);
62
63 s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE,
64 NULL);
65
66 res = k->startup_tpm ? k->startup_tpm(s) : 0;
67
68 s->had_startup_error = (res != 0);
69
70 return res;
71}
72
73bool tpm_backend_had_startup_error(TPMBackend *s)
74{
75 return s->had_startup_error;
76}
77
78void tpm_backend_deliver_request(TPMBackend *s, TPMBackendCmd *cmd)
79{
80 g_thread_pool_push(s->thread_pool, cmd, NULL);
81}
82
83void tpm_backend_reset(TPMBackend *s)
84{
85 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
86
87 if (k->reset) {
88 k->reset(s);
89 }
90
91 tpm_backend_thread_end(s);
92
93 s->had_startup_error = false;
94}
95
96void tpm_backend_cancel_cmd(TPMBackend *s)
97{
98 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
99
100 assert(k->cancel_cmd);
101
102 k->cancel_cmd(s);
103}
104
105bool tpm_backend_get_tpm_established_flag(TPMBackend *s)
106{
107 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
108
109 return k->get_tpm_established_flag ?
110 k->get_tpm_established_flag(s) : false;
111}
112
113int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty)
114{
115 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
116
117 return k->reset_tpm_established_flag ?
118 k->reset_tpm_established_flag(s, locty) : 0;
119}
120
121TPMVersion tpm_backend_get_tpm_version(TPMBackend *s)
122{
123 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
124
125 assert(k->get_tpm_version);
126
127 return k->get_tpm_version(s);
128}
129
130TPMInfo *tpm_backend_query_tpm(TPMBackend *s)
131{
132 TPMInfo *info = g_new0(TPMInfo, 1);
133 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
134
135 info->id = g_strdup(s->id);
136 info->model = s->fe_model;
137 if (k->get_tpm_options) {
138 info->options = k->get_tpm_options(s);
139 }
140
141 return info;
142}
143
144static bool tpm_backend_prop_get_opened(Object *obj, Error **errp)
145{
146 TPMBackend *s = TPM_BACKEND(obj);
147
148 return s->opened;
149}
150
151void tpm_backend_open(TPMBackend *s, Error **errp)
152{
153 object_property_set_bool(OBJECT(s), true, "opened", errp);
154}
155
156static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp)
157{
158 TPMBackend *s = TPM_BACKEND(obj);
159 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
160 Error *local_err = NULL;
161
162 if (value == s->opened) {
163 return;
164 }
165
166 if (!value && s->opened) {
167 error_setg(errp, QERR_PERMISSION_DENIED);
168 return;
169 }
170
171 if (k->opened) {
172 k->opened(s, &local_err);
173 if (local_err) {
174 error_propagate(errp, local_err);
175 return;
176 }
177 }
178
179 s->opened = true;
180}
181
182static void tpm_backend_instance_init(Object *obj)
183{
184 TPMBackend *s = TPM_BACKEND(obj);
185
186 object_property_add_bool(obj, "opened",
187 tpm_backend_prop_get_opened,
188 tpm_backend_prop_set_opened,
189 NULL);
190 s->fe_model = -1;
191}
192
193static void tpm_backend_instance_finalize(Object *obj)
194{
195 TPMBackend *s = TPM_BACKEND(obj);
196
197 g_free(s->id);
198 tpm_backend_thread_end(s);
199}
200
201static const TypeInfo tpm_backend_info = {
202 .name = TYPE_TPM_BACKEND,
203 .parent = TYPE_OBJECT,
204 .instance_size = sizeof(TPMBackend),
205 .instance_init = tpm_backend_instance_init,
206 .instance_finalize = tpm_backend_instance_finalize,
207 .class_size = sizeof(TPMBackendClass),
208 .abstract = true,
209};
210
211static const TypeInfo tpm_if_info = {
212 .name = TYPE_TPM_IF,
213 .parent = TYPE_INTERFACE,
214 .class_size = sizeof(TPMIfClass),
215};
216
217static void register_types(void)
218{
219 type_register_static(&tpm_backend_info);
220 type_register_static(&tpm_if_info);
221}
222
223type_init(register_types);
224