hw/tpm/tpm_util.h

   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
  28 void tpm_util_write_fatal_error_response(uint8_t *out, uint32_t out_len);
  29
  30 bool tpm_util_is_selftest(const uint8_t *in, uint32_t in_len);
  31
  32 int tpm_util_test_tpmdev(int tpm_fd, TPMVersion *tpm_version);
  33
  34 static inline uint16_t tpm_cmd_get_tag(const void *b)
  35 {
  36     return lduw_be_p(b);
  37 }
  38
  39 static inline void tpm_cmd_set_tag(void *b, uint16_t tag)
  40 {
  41     stw_be_p(b, tag);
  42 }
  43
  44 static inline uint32_t tpm_cmd_get_size(const void *b)
  45 {
  46     return ldl_be_p(b + 2);
  47 }
  48
  49 static inline void tpm_cmd_set_size(void *b, uint32_t size)
  50 {
  51     stl_be_p(b + 2, size);
  52 }
  53
  54 static inline uint32_t tpm_cmd_get_ordinal(const void *b)
  55 {
  56     return ldl_be_p(b + 6);
  57 }
  58
  59 static inline uint32_t tpm_cmd_get_errcode(const void *b)
  60 {
  61     return ldl_be_p(b + 6);
  62 }
  63
  64 static inline void tpm_cmd_set_error(void *b, uint32_t error)
  65 {
  66     stl_be_p(b + 6, error);
  67 }
  68
  69 int 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
  75 typedef struct TPMSizedBuffer {
  76     uint32_t size;
  77     uint8_t  *buffer;
  78 } TPMSizedBuffer;
  79
  80 void tpm_sized_buffer_reset(TPMSizedBuffer *tsb);
  81
  82 #endif /* TPM_TPM_UTIL_H */