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