net: ignore packet size greater than INT_MAX
[qemu/kevin.git] / backends / tpm.c
bloba00438b904f2f03246e6bf7b541797ed010e3395
1 /*
2 * QEMU TPM Backend
4 * Copyright IBM, Corp. 2013
6 * Authors:
7 * Stefan Berger <stefanb@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
12 * Based on backends/rng.c by Anthony Liguori
15 #include "qemu/osdep.h"
16 #include "sysemu/tpm_backend.h"
17 #include "qapi/error.h"
18 #include "sysemu/tpm.h"
19 #include "qemu/thread.h"
20 #include "qemu/main-loop.h"
21 #include "block/thread-pool.h"
22 #include "qemu/error-report.h"
24 static void tpm_backend_request_completed(void *opaque, int ret)
26 TPMBackend *s = TPM_BACKEND(opaque);
27 TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
29 tic->request_completed(s->tpmif, ret);
31 /* no need for atomic, as long the BQL is taken */
32 s->cmd = NULL;
33 object_unref(OBJECT(s));
36 static int tpm_backend_worker_thread(gpointer data)
38 TPMBackend *s = TPM_BACKEND(data);
39 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
40 Error *err = NULL;
42 k->handle_request(s, s->cmd, &err);
43 if (err) {
44 error_report_err(err);
45 return -1;
48 return 0;
51 void tpm_backend_finish_sync(TPMBackend *s)
53 while (s->cmd) {
54 aio_poll(qemu_get_aio_context(), true);
58 enum TpmType tpm_backend_get_type(TPMBackend *s)
60 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
62 return k->type;
65 int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp)
67 if (s->tpmif) {
68 error_setg(errp, "TPM backend '%s' is already initialized", s->id);
69 return -1;
72 s->tpmif = tpmif;
73 object_ref(OBJECT(tpmif));
75 s->had_startup_error = false;
77 return 0;
80 int tpm_backend_startup_tpm(TPMBackend *s, size_t buffersize)
82 int res = 0;
83 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
85 /* terminate a running TPM */
86 tpm_backend_finish_sync(s);
88 res = k->startup_tpm ? k->startup_tpm(s, buffersize) : 0;
90 s->had_startup_error = (res != 0);
92 return res;
95 bool tpm_backend_had_startup_error(TPMBackend *s)
97 return s->had_startup_error;
100 void tpm_backend_deliver_request(TPMBackend *s, TPMBackendCmd *cmd)
102 ThreadPool *pool = aio_get_thread_pool(qemu_get_aio_context());
104 if (s->cmd != NULL) {
105 error_report("There is a TPM request pending");
106 return;
109 s->cmd = cmd;
110 object_ref(OBJECT(s));
111 thread_pool_submit_aio(pool, tpm_backend_worker_thread, s,
112 tpm_backend_request_completed, s);
115 void tpm_backend_reset(TPMBackend *s)
117 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
119 if (k->reset) {
120 k->reset(s);
123 tpm_backend_finish_sync(s);
125 s->had_startup_error = false;
128 void tpm_backend_cancel_cmd(TPMBackend *s)
130 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
132 k->cancel_cmd(s);
135 bool tpm_backend_get_tpm_established_flag(TPMBackend *s)
137 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
139 return k->get_tpm_established_flag ?
140 k->get_tpm_established_flag(s) : false;
143 int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty)
145 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
147 return k->reset_tpm_established_flag ?
148 k->reset_tpm_established_flag(s, locty) : 0;
151 TPMVersion tpm_backend_get_tpm_version(TPMBackend *s)
153 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
155 return k->get_tpm_version(s);
158 size_t tpm_backend_get_buffer_size(TPMBackend *s)
160 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
162 return k->get_buffer_size(s);
165 TPMInfo *tpm_backend_query_tpm(TPMBackend *s)
167 TPMInfo *info = g_new0(TPMInfo, 1);
168 TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
169 TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
171 info->id = g_strdup(s->id);
172 info->model = tic->model;
173 info->options = k->get_tpm_options(s);
175 return info;
178 static void tpm_backend_instance_finalize(Object *obj)
180 TPMBackend *s = TPM_BACKEND(obj);
182 object_unref(OBJECT(s->tpmif));
183 g_free(s->id);
186 static const TypeInfo tpm_backend_info = {
187 .name = TYPE_TPM_BACKEND,
188 .parent = TYPE_OBJECT,
189 .instance_size = sizeof(TPMBackend),
190 .instance_finalize = tpm_backend_instance_finalize,
191 .class_size = sizeof(TPMBackendClass),
192 .abstract = true,
195 static const TypeInfo tpm_if_info = {
196 .name = TYPE_TPM_IF,
197 .parent = TYPE_INTERFACE,
198 .class_size = sizeof(TPMIfClass),
201 static void register_types(void)
203 type_register_static(&tpm_backend_info);
204 type_register_static(&tpm_if_info);
207 type_init(register_types);