linux-kernel - [PATCH v4 0/5] tpm: Preserve TPM measurement log across kexec (ppc64)

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Date:   Thu, 30 Jun 2022 22:25:58 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     kexec@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Cc:     nayna@...ux.ibm.com, nasastry@...ibm.com, mpe@...erman.id.au,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v4 0/5] tpm: Preserve TPM measurement log across kexec (ppc64)

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
-- 
2.35.1