tpm: parse TPM event logs based on EFI table
If we are not able to retrieve the TPM event logs from the ACPI table,
check the EFI configuration table (Linux-specific GUID).
The format version of the log is now returned by the provider function.
Signed-off-by: Thiebaud Weksteen <tweek@google.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
diff --git a/drivers/char/tpm/tpm_eventlog_of.c b/drivers/char/tpm/tpm_eventlog_of.c
index 4a2f8c7..96fd564 100644
--- a/drivers/char/tpm/tpm_eventlog_of.c
+++ b/drivers/char/tpm/tpm_eventlog_of.c
@@ -76,5 +76,7 @@ int tpm_read_log_of(struct tpm_chip *chip)
memcpy(log->bios_event_log, __va(base), size);
- return 0;
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ return EFI_TCG2_EVENT_LOG_FORMAT_TCG_2;
+ return EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2;
}