acpi: Extend TPM2 ACPI table with missing log fields

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

Cc: linux-acpi@vger.kernel.org
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
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>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
index b0b163b9efc6d0b2b14e12c322bde0ef534acf42..bdcac69fa6bde69b31d71f172f123f6584901486 100644 (file)
--- 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