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tpm: lookup tpm backend class in tpm_driver_find_by_type()

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One step towards removing TPMDriverOps and driver registration.

Signed-off-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>
This commit is contained in:
Marc-André Lureau 2017-10-10 00:55:45 +02:00 committed by Stefan Berger
parent 349ccdc89c
commit f3faa1dff4
1 changed files with 21 additions and 8 deletions
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29
tpm.c
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@ -47,6 +47,24 @@ void tpm_register_driver(const TPMDriverOps *tdo)
be_drivers[tdo->type] = tdo;
}
static const TPMDriverOps *
tpm_driver_find_by_type(enum TpmType type)
{
ObjectClass *oc;
TPMBackendClass *bc;
char *typename = g_strdup_printf("tpm-%s", TpmType_str(type));
oc = object_class_by_name(typename);
g_free(typename);
if (!object_class_dynamic_cast(oc, TYPE_TPM_BACKEND)) {
return NULL;
}
bc = TPM_BACKEND_CLASS(oc);
return bc->ops;
}
/*
* Walk the list of available TPM backend drivers and display them on the
* screen.
@ -58,11 +76,11 @@ static void tpm_display_backend_drivers(void)
fprintf(stderr, "Supported TPM types (choose only one):\n");
for (i = 0; i < TPM_TYPE__MAX; i++) {
if (be_drivers[i] == NULL) {
const TPMDriverOps *ops = tpm_driver_find_by_type(i);
if (!ops) {
continue;
}
fprintf(stderr, "%12s %s\n",
TpmType_str(i), be_drivers[i]->desc);
fprintf(stderr, "%12s %s\n", TpmType_str(i), ops->desc);
}
fprintf(stderr, "\n");
}
@ -196,11 +214,6 @@ int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
#endif /* CONFIG_TPM */
static const TPMDriverOps *tpm_driver_find_by_type(enum TpmType type)
{
return be_drivers[type];
}
/*
* Walk the list of active TPM backends and collect information about them
* following the schema description in qapi-schema.json.