[v4,0/5] tpm: Preserve TPM measurement log across kexec (ppc64)

Message

Stefan Berger July 1, 2022, 2:25 a.m. UTC

The of-tree subsystem does not currently preserve the IBM vTPM 1.2 and
vTPM 2.0 measurement logs across a kexec on PowerVM and PowerKVM. This
series fixes this for the kexec_file_load() syscall using the flattened
device tree (fdt) to carry the TPM measurement log's buffer across kexec.

   Stefan

v4:
 - Rebased on 2 patches that would otherwise create merge conflicts;
   posting these patches in this series with several tags removed so
   krobot can test the series already
 - Changes to individual patches documented in patch descripitons

v3:
 - Moved TPM Open Firmware related function to drivers/char/tpm/eventlog/tpm_of.c

v2:
 - rearranged patches
 - fixed compilation issues for x86

Palmer Dabbelt (1):
  drivers: of: kexec ima: Support 32-bit platforms

Stefan Berger (3):
  tpm: of: Make of-tree specific function commonly available
  of: kexec: Refactor IMA buffer related functions to make them reusable
  tpm/kexec: Duplicate TPM measurement log in of-tree for kexec

Vaibhav Jain (1):
  of: check previous kernel's ima-kexec-buffer against memory bounds

 drivers/char/tpm/eventlog/of.c |  31 +---
 drivers/of/kexec.c             | 328 +++++++++++++++++++++++++++++----
 include/linux/kexec.h          |   6 +
 include/linux/of.h             |   8 +-
 include/linux/tpm.h            |  27 +++
 kernel/kexec_file.c            |   6 +
 6 files changed, 340 insertions(+), 66 deletions(-)


base-commit: 03c765b0e3b4cb5063276b086c76f7a612856a9a