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author | Amarnath Valluri <amarnath.valluri@intel.com> | 2017-09-29 14:10:16 +0300 |
---|---|---|
committer | Stefan Berger <stefanb@linux.vnet.ibm.com> | 2017-10-13 07:34:33 -0400 |
commit | 93330cf542b920b6ea5fea8120a08b76bb353113 (patch) | |
tree | 8450f62f15427f279ea4257877d6ce91a062fcab | |
parent | f35fe5cb97bbdaa6a6967f2fefc3fc1f79680601 (diff) | |
download | qemu-93330cf542b920b6ea5fea8120a08b76bb353113.zip qemu-93330cf542b920b6ea5fea8120a08b76bb353113.tar.gz qemu-93330cf542b920b6ea5fea8120a08b76bb353113.tar.bz2 |
tpm-backend: Made few interface methods optional
This allows backend implementations left optional interface methods.
For mandatory methods assertion checks added.
Took the opportunity to remove unused methods:
- tpm_backend_get_desc()
- TPMDriverOps->handle_startup_error
Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger<stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
-rw-r--r-- | backends/tpm.c | 39 | ||||
-rw-r--r-- | hw/tpm/tpm_passthrough.c | 36 | ||||
-rw-r--r-- | include/sysemu/tpm_backend.h | 13 | ||||
-rw-r--r-- | tpm.c | 2 |
4 files changed, 28 insertions, 62 deletions
diff --git a/backends/tpm.c b/backends/tpm.c index cf5abf1..8911597 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -44,13 +44,6 @@ enum TpmType tpm_backend_get_type(TPMBackend *s) return k->ops->type; } -const char *tpm_backend_get_desc(TPMBackend *s) -{ - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - return k->ops->desc(); -} - int tpm_backend_init(TPMBackend *s, TPMState *state, TPMRecvDataCB *datacb) { @@ -58,12 +51,14 @@ int tpm_backend_init(TPMBackend *s, TPMState *state, s->tpm_state = state; s->recv_data_callback = datacb; + s->had_startup_error = false; - return k->ops->init(s); + return k->ops->init ? k->ops->init(s) : 0; } int tpm_backend_startup_tpm(TPMBackend *s) { + int res = 0; TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); /* terminate a running TPM */ @@ -73,20 +68,24 @@ int tpm_backend_startup_tpm(TPMBackend *s) NULL); g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); - return k->ops->startup_tpm(s); + res = k->ops->startup_tpm ? k->ops->startup_tpm(s) : 0; + + s->had_startup_error = (res != 0); + + return res; } bool tpm_backend_had_startup_error(TPMBackend *s) { - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - return k->ops->had_startup_error(s); + return s->had_startup_error; } size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + assert(k->ops->realloc_buffer); + return k->ops->realloc_buffer(sb); } @@ -100,15 +99,21 @@ void tpm_backend_reset(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - k->ops->reset(s); + if (k->ops->reset) { + k->ops->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->ops->cancel_cmd); + k->ops->cancel_cmd(s); } @@ -116,20 +121,24 @@ bool tpm_backend_get_tpm_established_flag(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - return k->ops->get_tpm_established_flag(s); + return k->ops->get_tpm_established_flag ? + k->ops->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->ops->reset_tpm_established_flag(s, locty); + return k->ops->reset_tpm_established_flag ? + k->ops->reset_tpm_established_flag(s, locty) : 0; } TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + assert(k->ops->get_tpm_version); + return k->ops->get_tpm_version(s); } diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 815a72e..4c21e52 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -54,7 +54,6 @@ struct TPMPassthruState { bool tpm_executing; bool tpm_op_canceled; int cancel_fd; - bool had_startup_error; TPMVersion tpm_version; }; @@ -227,29 +226,11 @@ static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd cmd) } } -/* - * Start the TPM (thread). If it had been started before, then terminate - * and start it again. - */ -static int tpm_passthrough_startup_tpm(TPMBackend *tb) -{ - return 0; -} - static void tpm_passthrough_reset(TPMBackend *tb) { - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - DPRINTF("tpm_passthrough: CALL TO TPM_RESET!\n"); tpm_passthrough_cancel_cmd(tb); - - tpm_pt->had_startup_error = false; -} - -static int tpm_passthrough_init(TPMBackend *tb) -{ - return 0; } static bool tpm_passthrough_get_tpm_established_flag(TPMBackend *tb) @@ -264,13 +245,6 @@ static int tpm_passthrough_reset_tpm_established_flag(TPMBackend *tb, return 0; } -static bool tpm_passthrough_get_startup_error(TPMBackend *tb) -{ - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - - return tpm_pt->had_startup_error; -} - static size_t tpm_passthrough_realloc_buffer(TPMSizedBuffer *sb) { size_t wanted_size = 4096; /* Linux tpm.c buffer size */ @@ -309,11 +283,6 @@ static void tpm_passthrough_cancel_cmd(TPMBackend *tb) } } -static const char *tpm_passthrough_create_desc(void) -{ - return "Passthrough TPM backend driver"; -} - static TPMVersion tpm_passthrough_get_tpm_version(TPMBackend *tb) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); @@ -453,13 +422,10 @@ static const QemuOptDesc tpm_passthrough_cmdline_opts[] = { static const TPMDriverOps tpm_passthrough_driver = { .type = TPM_TYPE_PASSTHROUGH, .opts = tpm_passthrough_cmdline_opts, - .desc = tpm_passthrough_create_desc, + .desc = "Passthrough TPM backend driver", .create = tpm_passthrough_create, - .init = tpm_passthrough_init, - .startup_tpm = tpm_passthrough_startup_tpm, .realloc_buffer = tpm_passthrough_realloc_buffer, .reset = tpm_passthrough_reset, - .had_startup_error = tpm_passthrough_get_startup_error, .cancel_cmd = tpm_passthrough_cancel_cmd, .get_tpm_established_flag = tpm_passthrough_get_tpm_established_flag, .reset_tpm_established_flag = tpm_passthrough_reset_tpm_established_flag, diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index 202ec8d..9ea7072 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -47,6 +47,7 @@ struct TPMBackend { TPMState *tpm_state; GThreadPool *thread_pool; TPMRecvDataCB *recv_data_callback; + bool had_startup_error; char *id; enum TpmModel fe_model; @@ -75,7 +76,7 @@ struct TPMDriverOps { enum TpmType type; const QemuOptDesc *opts; /* get a descriptive text of the backend to display to the user */ - const char *(*desc)(void); + const char *desc; TPMBackend *(*create)(QemuOpts *opts, const char *id); @@ -83,8 +84,6 @@ struct TPMDriverOps { int (*init)(TPMBackend *t); /* start up the TPM on the backend */ int (*startup_tpm)(TPMBackend *t); - /* returns true if nothing will ever answer TPM requests */ - bool (*had_startup_error)(TPMBackend *t); size_t (*realloc_buffer)(TPMSizedBuffer *sb); @@ -109,14 +108,6 @@ struct TPMDriverOps { enum TpmType tpm_backend_get_type(TPMBackend *s); /** - * tpm_backend_get_desc: - * @s: the backend - * - * Returns a human readable description of the backend. - */ -const char *tpm_backend_get_desc(TPMBackend *s); - -/** * tpm_backend_init: * @s: the backend to initialized * @state: TPMState @@ -62,7 +62,7 @@ static void tpm_display_backend_drivers(void) continue; } fprintf(stderr, "%12s %s\n", - TpmType_str(i), be_drivers[i]->desc()); + TpmType_str(i), be_drivers[i]->desc); } fprintf(stderr, "\n"); } |