With EFI U-Boot always allocates a buffer for the TPM event log. If a previous bootloader stage started an event log, U-Boot would copy the entries to that allocated buffer.
Without EFI U-Boot wants to reuse the event log memory from a previous bootloader stage instead. If U-Boot is first component to start the event log, e.g. when used in qemu there would be no memory allocated for the event log. So allocate memory in tcg2_log_prepare_buffer() if no event log was found and no buffer was allocated already. Also copy the address of the event log into the device tree for the kernel so the event log is accessible from Linux userspace too. Changes in v4: - reword commit message - include Ilias' patches for unifying event logs in the series Changes in v3: - fix test failure - sync description with cover letter Changes in v2: - fix return value handling - imply DEVRES in config TPM - use fdt_getprop for reading property - don't wrap #include in #if - fix memory leak in error case of tcg2_log_prepare_buffer - handle NULL elog parameter in tcg2_measurement_term - use CONFIG_TPM2_EVENT_LOG_SIZE - pass log_size instead of position in dt Ilias Apalodimas (2): tpm: unify the tcg2 eventlog structures tpm: unify the eventlog initialization Ludwig Nussel (4): test: include mapmem.h explicitly tpm: print all PCRs from pcr_read tpm: allocate tpm event log if missing Fix tcg2_measurement_init call boot/bootm.c | 18 ++--- boot/image-fdt.c | 69 +++++++++++++++++ cmd/tpm-v2.c | 69 ++++++++++++----- include/tpm-common.h | 2 + include/tpm_tcg2.h | 44 +++++------ lib/Kconfig | 1 + lib/efi_loader/efi_tcg2.c | 97 +++++------------------- lib/tpm_tcg2.c | 151 ++++++++++++++++++++++++++++++------- test/boot/measurement.c | 1 + test/py/tests/test_tpm2.py | 9 +-- 10 files changed, 296 insertions(+), 165 deletions(-) -- 2.43.0 base-commit: 3cdce049f90d77c3f9221f1eb73922384c8972c3 branch: us-tpm4
