diff options
| author | Thiebaud Weksteen <tweek@google.com> | 2017-09-20 10:13:40 +0200 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-01-08 12:58:35 +0200 |
| commit | 58cc1e4faf10a73c4302825ffd37a47d410fc1b5 (patch) | |
| tree | 11116081f88d7715e754baafe565603398fca5fe /drivers/char/tpm/tpm1_eventlog.c | |
| parent | 33b6d03469b2206fb51ecc37f40411a857ad8fff (diff) | |
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>
Diffstat (limited to 'drivers/char/tpm/tpm1_eventlog.c')
| -rw-r--r-- | drivers/char/tpm/tpm1_eventlog.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm1_eventlog.c b/drivers/char/tpm/tpm1_eventlog.c index d6f70f365443..add798bd69d0 100644 --- a/drivers/char/tpm/tpm1_eventlog.c +++ b/drivers/char/tpm/tpm1_eventlog.c @@ -21,6 +21,7 @@ */ #include <linux/seq_file.h> +#include <linux/efi.h> #include <linux/fs.h> #include <linux/security.h> #include <linux/module.h> @@ -371,6 +372,10 @@ static int tpm_read_log(struct tpm_chip *chip) if (rc != -ENODEV) return rc; + rc = tpm_read_log_efi(chip); + if (rc != -ENODEV) + return rc; + return tpm_read_log_of(chip); } @@ -388,11 +393,13 @@ int tpm_bios_log_setup(struct tpm_chip *chip) { const char *name = dev_name(&chip->dev); unsigned int cnt; + int log_version; int rc = 0; rc = tpm_read_log(chip); - if (rc) + if (rc < 0) return rc; + log_version = rc; cnt = 0; chip->bios_dir[cnt] = securityfs_create_dir(name, NULL); @@ -404,7 +411,7 @@ int tpm_bios_log_setup(struct tpm_chip *chip) cnt++; chip->bin_log_seqops.chip = chip; - if (chip->flags & TPM_CHIP_FLAG_TPM2) + if (log_version == EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) chip->bin_log_seqops.seqops = &tpm2_binary_b_measurements_seqops; else |