| Message ID | 20200706181953.3592084-2-stefanb@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | tpm2: Make TPM2 logs accessible for non-UEFI firmware | expand |
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
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