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 #ifdef CONFIG_TPM
  19
  20 int tpm_config_parse(QemuOptsList *opts_list, const char *optstr);
  21 int tpm_init(void);
  22 void tpm_cleanup(void);
  23
  24 typedef enum TPMVersion {
  25     TPM_VERSION_UNSPEC = 0,
  26     TPM_VERSION_1_2 = 1,
  27     TPM_VERSION_2_0 = 2,
  28 } TPMVersion;
  29
  30 #define TYPE_TPM_IF "tpm-if"
  31 typedef struct TPMIfClass TPMIfClass;
  32 DECLARE_CLASS_CHECKERS(TPMIfClass, TPM_IF,
  33                        TYPE_TPM_IF)
  34 #define TPM_IF(obj)                             \
  35     INTERFACE_CHECK(TPMIf, (obj), TYPE_TPM_IF)
  36
  37 typedef struct TPMIf TPMIf;
  38
  39 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 };
  46
  47 #define TYPE_TPM_TIS_ISA            "tpm-tis"
  48 #define TYPE_TPM_TIS_SYSBUS         "tpm-tis-device"
  49 #define TYPE_TPM_CRB                "tpm-crb"
  50 #define TYPE_TPM_SPAPR              "tpm-spapr"
  51 #define TYPE_TPM_TIS_I2C            "tpm-tis-i2c"
  52
  53 #define TPM_IS_TIS_ISA(chr)                         \
  54     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_ISA)
  55 #define TPM_IS_TIS_SYSBUS(chr)                      \
  56     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_SYSBUS)
  57 #define TPM_IS_CRB(chr)                             \
  58     object_dynamic_cast(OBJECT(chr), TYPE_TPM_CRB)
  59 #define TPM_IS_SPAPR(chr)                           \
  60     object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR)
  61 #define TPM_IS_TIS_I2C(chr)                      \
  62     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_I2C)
  63
  64 /* returns NULL unless there is exactly one TPM device */
  65 static inline TPMIf *tpm_find(void)
  66 {
  67     Object *obj = object_resolve_path_type("", TYPE_TPM_IF, NULL);
  68
  69     return TPM_IF(obj);
  70 }
  71
  72 static inline TPMVersion tpm_get_version(TPMIf *ti)
  73 {
  74     if (!ti) {
  75         return TPM_VERSION_UNSPEC;
  76     }
  77
  78     return TPM_IF_GET_CLASS(ti)->get_version(ti);
  79 }
  80
  81 #else /* CONFIG_TPM */
  82
  83 #define tpm_init()  (0)
  84 #define tpm_cleanup()
  85
  86 /* needed for an alignment check in non-tpm code */
  87 static inline Object *TPM_IS_CRB(Object *obj)
  88 {
  89      return NULL;
  90 }
  91
  92 #endif /* CONFIG_TPM */
  93
  94 #endif /* QEMU_TPM_H */