include/sysemu/tpm.h

   1 /*
   2  * Public TPM functions
   3  *
   4  * Copyright (C) 2011-2013 IBM Corporation
   5  *
   6  * Authors:
   7  *  Stefan Berger    <stefanb@us.ibm.com>
   8  *
   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.
  11  */
  12 #ifndef QEMU_TPM_H
  13 #define QEMU_TPM_H
  14
  15 #include "qom/object.h"
  16
  17 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
  18 int tpm_init(void);
  19 void tpm_cleanup(void);
  20
  21 typedef enum TPMVersion {
  22     TPM_VERSION_UNSPEC = 0,
  23     TPM_VERSION_1_2 = 1,
  24     TPM_VERSION_2_0 = 2,
  25 } TPMVersion;
  26
  27 #define TYPE_TPM_IF "tpm-if"
  28 #define TPM_IF_CLASS(klass)                                 \
  29     OBJECT_CLASS_CHECK(TPMIfClass, (klass), TYPE_TPM_IF)
  30 #define TPM_IF_GET_CLASS(obj)                           \
  31     OBJECT_GET_CLASS(TPMIfClass, (obj), TYPE_TPM_IF)
  32 #define TPM_IF(obj)                             \
  33     INTERFACE_CHECK(TPMIf, (obj), TYPE_TPM_IF)
  34
  35 typedef struct TPMIf {
  36     Object parent_obj;
  37 } TPMIf;
  38
  39 typedef struct TPMIfClass {
  40     InterfaceClass parent_class;
  41
  42     enum TpmModel model;
  43     void (*request_completed)(TPMIf *obj, int ret);
  44     enum TPMVersion (*get_version)(TPMIf *obj);
  45 } TPMIfClass;
  46
  47 #define TYPE_TPM_TIS                "tpm-tis"
  48 #define TYPE_TPM_CRB                "tpm-crb"
  49
  50 #define TPM_IS_TIS(chr)                             \
  51     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS)
  52 #define TPM_IS_CRB(chr)                             \
  53     object_dynamic_cast(OBJECT(chr), TYPE_TPM_CRB)
  54
  55 /* returns NULL unless there is exactly one TPM device */
  56 static inline TPMIf *tpm_find(void)
  57 {
  58     Object *obj = object_resolve_path_type("", TYPE_TPM_IF, NULL);
  59
  60     return TPM_IF(obj);
  61 }
  62
  63 static inline TPMVersion tpm_get_version(TPMIf *ti)
  64 {
  65     if (!ti) {
  66         return TPM_VERSION_UNSPEC;
  67     }
  68
  69     return TPM_IF_GET_CLASS(ti)->get_version(ti);
  70 }
  71
  72 #endif /* QEMU_TPM_H */