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    Subject[PATCH v6 1/2] acpi: Extend TPM2 ACPI table with missing log fields
    Date
    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>
    Cc: Jiandi An <anjiandi@codeaurora.org>
    ---
    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
    --
    2.26.2
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