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 /* overall state of the TPM interface */
  22 typedef struct TPMState {
  23     ISADevice busdev;
  24     MemoryRegion mmio;
  25
  26     union {
  27         TPMTISEmuState tis;
  28     } s;
  29
  30     uint8_t     locty_number;
  31     TPMLocality *locty_data;
  32
  33     char *backend;
  34     TPMBackend *be_driver;
  35 } TPMState;
  36
  37 #define TPM(obj) OBJECT_CHECK(TPMState, (obj), TYPE_TPM_TIS)
  38
  39 typedef void (TPMRecvDataCB)(TPMState *, uint8_t locty);
  40
  41 struct TPMDriverOps {
  42     enum TpmType type;
  43     /* get a descriptive text of the backend to display to the user */
  44     const char *(*desc)(void);
  45
  46     TPMBackend *(*create)(QemuOpts *opts, const char *id);
  47     void (*destroy)(TPMBackend *t);
  48
  49     /* initialize the backend */
  50     int (*init)(TPMBackend *t, TPMState *s, TPMRecvDataCB *datacb);
  51     /* start up the TPM on the backend */
  52     int (*startup_tpm)(TPMBackend *t);
  53     /* returns true if nothing will ever answer TPM requests */
  54     bool (*had_startup_error)(TPMBackend *t);
  55
  56     size_t (*realloc_buffer)(TPMSizedBuffer *sb);
  57
  58     void (*deliver_request)(TPMBackend *t);
  59
  60     void (*reset)(TPMBackend *t);
  61
  62     void (*cancel_cmd)(TPMBackend *t);
  63
  64     bool (*get_tpm_established_flag)(TPMBackend *t);
  65 };
  66
  67 struct tpm_req_hdr {
  68     uint16_t tag;
  69     uint32_t len;
  70     uint32_t ordinal;
  71 } QEMU_PACKED;
  72
  73 struct tpm_resp_hdr {
  74     uint16_t tag;
  75     uint32_t len;
  76     uint32_t errcode;
  77 } QEMU_PACKED;
  78
  79 #define TPM_TAG_RQU_COMMAND       0xc1
  80 #define TPM_TAG_RQU_AUTH1_COMMAND 0xc2
  81 #define TPM_TAG_RQU_AUTH2_COMMAND 0xc3
  82
  83 #define TPM_TAG_RSP_COMMAND       0xc4
  84 #define TPM_TAG_RSP_AUTH1_COMMAND 0xc5
  85 #define TPM_TAG_RSP_AUTH2_COMMAND 0xc6
  86
  87 #define TPM_FAIL                  9
  88
  89 #define TPM_ORD_GetTicks          0xf1
  90
  91 TPMBackend *qemu_find_tpm(const char *id);
  92 int tpm_register_model(enum TpmModel model);
  93 int tpm_register_driver(const TPMDriverOps *tdo);
  94 void tpm_display_backend_drivers(void);
  95 const TPMDriverOps *tpm_get_backend_driver(const char *type);
  96 void tpm_write_fatal_error_response(uint8_t *out, uint32_t out_len);
  97
  98 extern const TPMDriverOps tpm_passthrough_driver;
  99
 100 #endif /* TPM_TPM_INT_H */