[PATCH v7 0/6] tpm: Preserve TPM measurement log across kexec (ppc64)

Stefan Berger
2022-08-12T16:43:47Z

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

v7:
- Added Nageswara's Tested-by tags
- Added back original comment to inline function and removed Jarkko's R-b tag

v6:
- Add __init to get_kexec_buffer as suggested by Jonathan
- Fixed issue detected by kernel test robot

v5:
- Rebased on 1 more patch that would otherwise create merge conflicts

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

Jonathan McDowell (1):
x86/kexec: Carry forward IMA measurement log on kexec

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

arch/x86/Kconfig | 1 +
arch/x86/include/uapi/asm/bootparam.h | 9 +
arch/x86/kernel/e820.c | 6 +-
arch/x86/kernel/kexec-bzimage64.c | 42 +++-
arch/x86/kernel/setup.c | 63 +++++
drivers/char/tpm/eventlog/of.c | 31 +--
drivers/of/kexec.c | 342 ++++++++++++++++++++++----
include/linux/ima.h | 5 +
include/linux/kexec.h | 6 +
include/linux/of.h | 11 +-
include/linux/tpm.h | 36 +++
kernel/kexec_file.c | 6 +
security/integrity/ima/ima_kexec.c | 2 +-
13 files changed, 478 insertions(+), 82 deletions(-)

base-commit: 3d7cb6b04c3f3115719235cc6866b10326de34cd
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2.35.1