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| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2020-07-03 01:55:59 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2020-07-24 09:26:23 +0300 |
| commit | 6c4e79d99e6f42b79040f1a33cd4018f5425030b (patch) | |
| tree | 2837a1dfd03cbcc0d543e46c3531197022ae1b18 /include/linux/tpm.h | |
| parent | 7f3d176f5f7e3f0477bf82df0f600fcddcdcc4e4 (diff) | |
| download | lwn-6c4e79d99e6f42b79040f1a33cd4018f5425030b.tar.gz lwn-6c4e79d99e6f42b79040f1a33cd4018f5425030b.zip | |
tpm: Unify the mismatching TPM space buffer sizes
The size of the buffers for storing context's and sessions can vary from
arch to arch as PAGE_SIZE can be anything between 4 kB and 256 kB (the
maximum for PPC64). Define a fixed buffer size set to 16 kB. This should be
enough for most use with three handles (that is how many we allow at the
moment). Parametrize the buffer size while doing this, so that it is easier
to revisit this later on if required.
Cc: stable@vger.kernel.org
Reported-by: Stefan Berger <stefanb@linux.ibm.com>
Fixes: 745b361e989a ("tpm: infrastructure for TPM spaces")
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'include/linux/tpm.h')
| -rw-r--r-- | include/linux/tpm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 03e9b184411b..8f4ff39f51e7 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -96,6 +96,7 @@ struct tpm_space { u8 *context_buf; u32 session_tbl[3]; u8 *session_buf; + u32 buf_size; }; struct tpm_bios_log { |