[RFC,v2,0/3] Preserve TPM log across kexec

Message

Stefan Berger March 11, 2024, 1:20 p.m. UTC

This series resolves an issue on PowerVM and KVM on Power where the memory
the TPM log was held in may become inaccessible or corrupted after a kexec
soft reboot. The solution on these two platforms is to store the whole log
in the device tree because the device tree is preserved across a kexec with
either of the two kexec syscalls.

Regards,
   Stefan

v2:
 - Added DT bindings patch (2/3)
 - Reformulated commit messages and addded Fixes tags
 - Follow Michael's suggestion on prom_init patch (1/3)

Stefan Berger (3):
  powerpc/prom_init: Replace linux,sml-base/sml-size with linux,sml-log
  dt-bindings: tpm: Add linux,sml-log to ibm,vtpm.yaml
  tpm: of: If available use linux,sml-log to get the log and its size

 .../devicetree/bindings/tpm/ibm,vtpm.yaml     | 20 +++++++++--
 .../devicetree/bindings/tpm/tpm-common.yaml   | 14 +++++++-
 arch/powerpc/kernel/prom_init.c               | 27 +++++++++-----
 drivers/char/tpm/eventlog/of.c                | 36 ++++++-------------
 4 files changed, 61 insertions(+), 36 deletions(-)