On 01/11/2017 02:54 AM, Nayna Jain wrote:
> Unlike the device driver support for TPM 1.2, the TPM 2.0 does
> not support the securityfs pseudo files for displaying the
> firmware event log.
>
> This patch enables support for providing the TPM 2.0 event log in
> binary form. TPM 2.0 event log supports a crypto agile format that
> records multiple digests, which is different from TPM 1.2. This
> patch enables the tpm_bios_log_setup for TPM 2.0 and adds the
> event log parser which understand the TPM 2.0 crypto agile format.
>
> Signed-off-by: Nayna Jain <[email protected]>
> ---
> drivers/char/tpm/Makefile | 2 +-
> .../char/tpm/{tpm_eventlog.c => tpm1_eventlog.c} | 35 ++--
> drivers/char/tpm/tpm2_eventlog.c | 203
> +++++++++++++++++++++
> drivers/char/tpm/tpm_acpi.c | 3 +
> drivers/char/tpm/tpm_eventlog.h | 63 +++++++
> 5 files changed, 291 insertions(+), 15 deletions(-)
> rename drivers/char/tpm/{tpm_eventlog.c => tpm1_eventlog.c} (95%)
> create mode 100644 drivers/char/tpm/tpm2_eventlog.c
>
>
> diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c
> index b7718c9..169edf3 100644
> --- a/drivers/char/tpm/tpm_acpi.c
> +++ b/drivers/char/tpm/tpm_acpi.c
> @@ -54,6 +54,9 @@ int tpm_read_log_acpi(struct tpm_chip *chip)
> u64 len, start;
> struct tpm_bios_log *log;
>
> + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + return -ENODEV;
> +
Works with SeaBIOS when this check is disabled.
Stefan
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