tpm: Decouple PCR extend from driver

Decouple tpm2-sessions enough from implementation so that building for PCR
extend commands can be decoupled from rest of the implementation. This is
a mandatory for Trenchboot series, and including all these changes for
that series would over-complicate it.

This is first part of refactorizations for make grounds for Trenchboot,
and still aimed for 6.18. The second part includes robustness updates
for tpm-buf.

v2:
- While including fixes from v1, this patch set has a refocus in order to
  do minimal changes to make code base more compatible  Trenchboot.

Jarkko Sakkinen (9):
  tpm: cap PCR bank in tpm2_get_pcr_allocations()
  tpm: Use -EPERM as fallback error code in tpm_ret_to_err
  KEYS: trusted: Use tpm_ret_to_err() in trusted_tpm2
  tpm2-sessions: Remove 'attributes' from tpm_buf_append_auth
  tpm2-sessions: Umask tpm_buf_append_hmac_session()
  KEYS: trusted: Open code tpm2_buf_append()
  tpm-buf: check for corruption in  tpm_buf_append_handle()
  tpm-buf: Remove chip parameeter from tpm_buf_append_handle
  tpm-buf: Build PCR extend commands

 drivers/char/tpm/tpm-buf.c                | 85 +++++++++++++++++---
 drivers/char/tpm/tpm-chip.c               | 13 +++-
 drivers/char/tpm/tpm.h                    |  1 -
 drivers/char/tpm/tpm1-cmd.c               | 40 ++--------
 drivers/char/tpm/tpm2-cmd.c               | 39 ++++++----
 drivers/char/tpm/tpm2-sessions.c          |  7 +-
 include/linux/tpm.h                       | 61 +++++----------
 include/linux/tpm_command.h               |  5 +-
 security/keys/trusted-keys/trusted_tpm2.c | 95 +++++++----------------
 9 files changed, 170 insertions(+), 176 deletions(-)

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2.39.5