LXR qemu/hw/tpm/tpm

   1/*
   2 * TPM utility functions
   3 *
   4 *  Copyright (c) 2010 - 2015 IBM Corporation
   5 *  Authors:
   6 *    Stefan Berger <stefanb@us.ibm.com>
   7 *
   8 * This library is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU Lesser General Public
  10 * License as published by the Free Software Foundation; either
  11 * version 2 of the License, or (at your option) any later version.
  12 *
  13 * This library is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 * Lesser General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU Lesser General Public
  19 * License along with this library; if not, see <http://www.gnu.org/licenses/>
  20 */
  21
  22#ifndef TPM_TPM_UTIL_H
  23#define TPM_TPM_UTIL_H
  24
  25#include "sysemu/tpm.h"
  26#include "qemu/bswap.h"
  27
  28void tpm_util_write_fatal_error_response(uint8_t *out, uint32_t out_len);
  29
  30bool tpm_util_is_selftest(const uint8_t *in, uint32_t in_len);
  31
  32int tpm_util_test_tpmdev(int tpm_fd, TPMVersion *tpm_version);
  33
  34static inline uint16_t tpm_cmd_get_tag(const void *b)
  35{
  36    return lduw_be_p(b);
  37}
  38
  39static inline void tpm_cmd_set_tag(void *b, uint16_t tag)
  40{
  41    stw_be_p(b, tag);
  42}
  43
  44static inline uint32_t tpm_cmd_get_size(const void *b)
  45{
  46    return ldl_be_p(b + 2);
  47}
  48
  49static inline void tpm_cmd_set_size(void *b, uint32_t size)
  50{
  51    stl_be_p(b + 2, size);
  52}
  53
  54static inline uint32_t tpm_cmd_get_ordinal(const void *b)
  55{
  56    return ldl_be_p(b + 6);
  57}
  58
  59static inline uint32_t tpm_cmd_get_errcode(const void *b)
  60{
  61    return ldl_be_p(b + 6);
  62}
  63
  64static inline void tpm_cmd_set_error(void *b, uint32_t error)
  65{
  66    stl_be_p(b + 6, error);
  67}
  68
  69int tpm_util_get_buffer_size(int tpm_fd, TPMVersion tpm_version,
  70                             size_t *buffersize);
  71
  72#define DEFINE_PROP_TPMBE(_n, _s, _f)                     \
  73    DEFINE_PROP(_n, _s, _f, qdev_prop_tpm, TPMBackend *)
  74
  75typedef struct TPMSizedBuffer {
  76    uint32_t size;
  77    uint8_t  *buffer;
  78} TPMSizedBuffer;
  79
  80void tpm_sized_buffer_reset(TPMSizedBuffer *tsb);
  81
  82#endif /* TPM_TPM_UTIL_H */
  83