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author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2021-01-14 02:26:33 +0300 |
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committer | Jarkko Sakkinen <jarkko@kernel.org> | 2021-02-16 11:40:27 +0300 |
commit | aab73d9524026caa14aab17fa9b750a6539fd49f (patch) | |
tree | 94e4a27f18500a767c01e7bc2d57a2d1ceeba7e1 /include/linux/tpm.h | |
parent | 40d32b59e37346fe89d27f83279ad81cd7dcc4a5 (diff) | |
download | linux-aab73d9524026caa14aab17fa9b750a6539fd49f.tar.xz |
tpm: add sysfs exports for all banks of PCR registers
Create sysfs per hash groups with 24 PCR files in them one group,
named pcr-<hash>, for each agile hash of the TPM. The files are
plugged in to a PCR read function which is TPM version agnostic, so
this works also for TPM 1.2 but the hash is only sha1 in that case.
Note: the macros used to create the hashes emit spurious checkpatch
warnings. Do not try to "fix" them as checkpatch recommends, otherwise
they'll break.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Tested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'include/linux/tpm.h')
-rw-r--r-- | include/linux/tpm.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 8f4ff39f51e7..ae2482510f8c 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -31,6 +31,7 @@ struct tpm_chip; struct trusted_key_payload; struct trusted_key_options; +/* if you add a new hash to this, increment TPM_MAX_HASHES below */ enum tpm_algorithms { TPM_ALG_ERROR = 0x0000, TPM_ALG_SHA1 = 0x0004, @@ -42,6 +43,12 @@ enum tpm_algorithms { TPM_ALG_SM3_256 = 0x0012, }; +/* + * maximum number of hashing algorithms a TPM can have. This is + * basically a count of every hash in tpm_algorithms above + */ +#define TPM_MAX_HASHES 5 + struct tpm_digest { u16 alg_id; u8 digest[TPM_MAX_DIGEST_SIZE]; @@ -146,7 +153,7 @@ struct tpm_chip { struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES]; - const struct attribute_group *groups[3]; + const struct attribute_group *groups[3 + TPM_MAX_HASHES]; unsigned int groups_cnt; u32 nr_allocated_banks; |