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SubjectRe: [PATCH v9 1/2] acpi: Extend TPM2 ACPI table with missing log fields
Date

Stefan Berger @ 2020-07-06 11:19 MST:

> From: Stefan Berger <stefanb@linux.ibm.com>
>
> Recent extensions of the TPM2 ACPI table added 3 more fields
> including 12 bytes of start method specific parameters and Log Area
> Minimum Length (u32) and Log Area Start Address (u64). So, we define
> a new structure acpi_tpm2_phy that holds these optional new fields.
> The new fields allow non-UEFI systems to access the TPM2's log.
>
> The specification that has the new fields is the following:
> TCG ACPI Specification
> Family "1.2" and "2.0"
> Version 1.2, Revision 8
>
> https://trustedcomputinggroup.org/wp-content/uploads/TCG_ACPIGeneralSpecification_v1.20_r8.pdf
>
> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
> Cc: linux-acpi@vger.kernel.org
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>

> ---
> include/acpi/actbl3.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
> index b0b163b9efc6..bdcac69fa6bd 100644
> --- a/include/acpi/actbl3.h
> +++ b/include/acpi/actbl3.h
> @@ -415,6 +415,13 @@ struct acpi_table_tpm2 {
> /* Platform-specific data follows */
> };
>
> +/* Optional trailer for revision 4 holding platform-specific data */
> +struct acpi_tpm2_phy {
> + u8 start_method_specific[12];
> + u32 log_area_minimum_length;
> + u64 log_area_start_address;
> +};
> +
> /* Values for start_method above */
>
> #define ACPI_TPM2_NOT_ALLOWED 0

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