On Mon, Sep 11, 2017 at 12:00:19PM +0200, Thiebaud Weksteen wrote:
> With TPM 1.2, the ACPI table ("TCPA") has two fields to recover the Event Log
> Area (LAML and LASA). These logs are useful to understand and rebuild the
> final values of PCRs.
>
> With TPM 2.0, the ACPI table ("TPM2") does not contain these fields anymore.
> The recommended method is now to call the GetEventLog EFI protocol before
> ExitBootServices.
>
> Implement this method within the EFI stub and create copy of the logs for the
> TPM device. This will create /sys/kernel/security/tpm0/binary_bios_measurements
> for TPM 2.0 devices (similarly to the current behaviour for TPM 1.2 devices).
>
> -------------------------------------------------------------------------------
>
> Patchset Changelog:
>
> Version 2:
> - Move tpm_eventlog.h to top include directory, add commit for this.
> - Use EFI_LOADER_DATA to store the configuration table
> - Whitespace and new lines fixes
>
>
> Thiebaud Weksteen (3):
> tpm: move tpm_eventlog.h outside of drivers folder
> efi: call get_event_log before ExitBootServices
> tpm: parse TPM event logs based on EFI table
>
> arch/x86/boot/compressed/eboot.c | 1 +
> drivers/char/tpm/Makefile | 2 +-
> drivers/char/tpm/tpm-chip.c | 3 +-
> drivers/char/tpm/tpm-interface.c | 2 +-
> drivers/char/tpm/tpm.h | 35 ++++++++--
> drivers/char/tpm/tpm1_eventlog.c | 17 +++--
> drivers/char/tpm/tpm2_eventlog.c | 2 +-
> drivers/char/tpm/tpm_acpi.c | 2 +-
> drivers/char/tpm/tpm_efi.c | 66 ++++++++++++++++++
> drivers/char/tpm/tpm_of.c | 2 +-
> drivers/firmware/efi/Makefile | 2 +-
> drivers/firmware/efi/efi.c | 4 ++
> drivers/firmware/efi/libstub/Makefile | 3 +-
> drivers/firmware/efi/libstub/tpm.c | 81 ++++++++++++++++++++++
> drivers/firmware/efi/tpm.c | 39 +++++++++++
> include/linux/efi.h | 50 +++++++++++++
> {drivers/char/tpm => include/linux}/tpm_eventlog.h | 32 ++-------
> 17 files changed, 301 insertions(+), 42 deletions(-)
> create mode 100644 drivers/char/tpm/tpm_efi.c
> create mode 100644 drivers/firmware/efi/tpm.c
> rename {drivers/char/tpm => include/linux}/tpm_eventlog.h (77%)
>
> --
> 2.14.1.581.gf28d330327-goog
>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
/Jarkko
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