tpm/tpm_int.h

   1 /*
   2  * TPM configuration
   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 TPM_TPM_INT_H
  13 #define TPM_TPM_INT_H
  14
  15 #include "exec/memory.h"
  16 #include "tpm/tpm_tis.h"
  17
  18 struct TPMDriverOps;
  19 typedef struct TPMDriverOps TPMDriverOps;
  20
  21 typedef struct TPMBackend {
  22     char *id;
  23     enum TpmModel fe_model;
  24     char *path;
  25     char *cancel_path;
  26     const TPMDriverOps *ops;
  27
  28     QLIST_ENTRY(TPMBackend) list;
  29 } TPMBackend;
  30
  31 /* overall state of the TPM interface */
  32 typedef struct TPMState {
  33     ISADevice busdev;
  34     MemoryRegion mmio;
  35
  36     union {
  37         TPMTISEmuState tis;
  38     } s;
  39
  40     uint8_t     locty_number;
  41     TPMLocality *locty_data;
  42
  43     char *backend;
  44     TPMBackend *be_driver;
  45 } TPMState;
  46
  47 #define TPM(obj) OBJECT_CHECK(TPMState, (obj), TYPE_TPM_TIS)
  48
  49 typedef void (TPMRecvDataCB)(TPMState *, uint8_t locty);
  50
  51 struct TPMDriverOps {
  52     enum TpmType type;
  53     /* get a descriptive text of the backend to display to the user */
  54     const char *(*desc)(void);
  55
  56     TPMBackend *(*create)(QemuOpts *opts, const char *id);
  57     void (*destroy)(TPMBackend *t);
  58
  59     /* initialize the backend */
  60     int (*init)(TPMBackend *t, TPMState *s, TPMRecvDataCB *datacb);
  61     /* start up the TPM on the backend */
  62     int (*startup_tpm)(TPMBackend *t);
  63     /* returns true if nothing will ever answer TPM requests */
  64     bool (*had_startup_error)(TPMBackend *t);
  65
  66     size_t (*realloc_buffer)(TPMSizedBuffer *sb);
  67
  68     void (*deliver_request)(TPMBackend *t);
  69
  70     void (*reset)(TPMBackend *t);
  71
  72     void (*cancel_cmd)(TPMBackend *t);
  73
  74     bool (*get_tpm_established_flag)(TPMBackend *t);
  75 };
  76
  77 TPMBackend *qemu_find_tpm(const char *id);
  78 int tpm_register_model(enum TpmModel model);
  79 int tpm_register_driver(const TPMDriverOps *tdo);
  80 void tpm_display_backend_drivers(void);
  81 const TPMDriverOps *tpm_get_backend_driver(const char *type);
  82
  83 #endif /* TPM_TPM_INT_H */