LXR qemu/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
  20int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
  21int tpm_init(void);
  22void tpm_cleanup(void);
  23
  24typedef 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"
  31typedef struct TPMIfClass TPMIfClass;
  32DECLARE_CLASS_CHECKERS(TPMIfClass, TPM_IF,
  33                       TYPE_TPM_IF)
  34#define TPM_IF(obj)                             \
  35    INTERFACE_CHECK(TPMIf, (obj), TYPE_TPM_IF)
  36
  37typedef struct TPMIf TPMIf;
  38
  39struct 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 */
  65static 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
  72static 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 */
  87static inline Object *TPM_IS_CRB(Object *obj)
  88{
  89     return NULL;
  90}
  91
  92#endif /* CONFIG_TPM */
  93
  94#endif /* QEMU_TPM_H */
  95