drivers/char/tpm/tpm_eventlog.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __TPM_EVENTLOG_H__
   4 #define __TPM_EVENTLOG_H__
   5
   6 #include <crypto/hash_info.h>
   7
   8 #define TCG_EVENT_NAME_LEN_MAX  255
   9 #define MAX_TEXT_EVENT          1000    /* Max event string length */
  10 #define ACPI_TCPA_SIG           "TCPA"  /* 0x41504354 /'TCPA' */
  11 #define TPM2_ACTIVE_PCR_BANKS   3
  12
  13 #ifdef CONFIG_PPC64
  14 #define do_endian_conversion(x) be32_to_cpu(x)
  15 #else
  16 #define do_endian_conversion(x) x
  17 #endif
  18
  19 enum bios_platform_class {
  20         BIOS_CLIENT = 0x00,
  21         BIOS_SERVER = 0x01,
  22 };
  23
  24 struct tcpa_event {
  25         u32 pcr_index;
  26         u32 event_type;
  27         u8 pcr_value[20];       /* SHA1 */
  28         u32 event_size;
  29         u8 event_data[0];
  30 };
  31
  32 enum tcpa_event_types {
  33         PREBOOT = 0,
  34         POST_CODE,
  35         UNUSED,
  36         NO_ACTION,
  37         SEPARATOR,
  38         ACTION,
  39         EVENT_TAG,
  40         SCRTM_CONTENTS,
  41         SCRTM_VERSION,
  42         CPU_MICROCODE,
  43         PLATFORM_CONFIG_FLAGS,
  44         TABLE_OF_DEVICES,
  45         COMPACT_HASH,
  46         IPL,
  47         IPL_PARTITION_DATA,
  48         NONHOST_CODE,
  49         NONHOST_CONFIG,
  50         NONHOST_INFO,
  51 };
  52
  53 struct tcpa_pc_event {
  54         u32 event_id;
  55         u32 event_size;
  56         u8 event_data[0];
  57 };
  58
  59 enum tcpa_pc_event_ids {
  60         SMBIOS = 1,
  61         BIS_CERT,
  62         POST_BIOS_ROM,
  63         ESCD,
  64         CMOS,
  65         NVRAM,
  66         OPTION_ROM_EXEC,
  67         OPTION_ROM_CONFIG,
  68         OPTION_ROM_MICROCODE = 10,
  69         S_CRTM_VERSION,
  70         S_CRTM_CONTENTS,
  71         POST_CONTENTS,
  72         HOST_TABLE_OF_DEVICES,
  73 };
  74
  75 /* http://www.trustedcomputinggroup.org/tcg-efi-protocol-specification/ */
  76
  77 struct tcg_efi_specid_event_algs {
  78         u16 alg_id;
  79         u16 digest_size;
  80 } __packed;
  81
  82 struct tcg_efi_specid_event {
  83         u8 signature[16];
  84         u32 platform_class;
  85         u8 spec_version_minor;
  86         u8 spec_version_major;
  87         u8 spec_errata;
  88         u8 uintnsize;
  89         u32 num_algs;
  90         struct tcg_efi_specid_event_algs digest_sizes[TPM2_ACTIVE_PCR_BANKS];
  91         u8 vendor_info_size;
  92         u8 vendor_info[0];
  93 } __packed;
  94
  95 struct tcg_pcr_event {
  96         u32 pcr_idx;
  97         u32 event_type;
  98         u8 digest[20];
  99         u32 event_size;
 100         u8 event[0];
 101 } __packed;
 102
 103 struct tcg_event_field {
 104         u32 event_size;
 105         u8 event[0];
 106 } __packed;
 107
 108 struct tcg_pcr_event2 {
 109         u32 pcr_idx;
 110         u32 event_type;
 111         u32 count;
 112         struct tpm2_digest digests[TPM2_ACTIVE_PCR_BANKS];
 113         struct tcg_event_field event;
 114 } __packed;
 115
 116 extern const struct seq_operations tpm2_binary_b_measurements_seqops;
 117
 118 #if defined(CONFIG_ACPI)
 119 int tpm_read_log_acpi(struct tpm_chip *chip);
 120 #else
 121 static inline int tpm_read_log_acpi(struct tpm_chip *chip)
 122 {
 123         return -ENODEV;
 124 }
 125 #endif
 126 #if defined(CONFIG_OF)
 127 int tpm_read_log_of(struct tpm_chip *chip);
 128 #else
 129 static inline int tpm_read_log_of(struct tpm_chip *chip)
 130 {
 131         return -ENODEV;
 132 }
 133 #endif
 134
 135 int tpm_bios_log_setup(struct tpm_chip *chip);
 136 void tpm_bios_log_teardown(struct tpm_chip *chip);
 137
 138 #endif