[SeaBIOS] [PATCH V6 0/9] Add TPM support to SeaBIOS

Stefan Berger stefanb at linux.vnet.ibm.com
Wed Aug 10 18:51:22 CEST 2011

The following set of patches add TPM and Trusted Computing support to SeaBIOS.
In particular the patches add:

- a TPM driver for the Qemu's TPM TIS emulation (not yet in Qemu git)
- ACPI support for the TPM device (SSDT table)
- ACPI support for measurement logging (TCPA table)
- Support for initialzation of the TPM
- Support for the TCG BIOS extensions (1ah handler [ah = 0xbb])
  (used by trusted grub; http://trousers.sourceforge.net/grub.html)
- Static Root of Trusted for Measurement (SRTM) support
- Support for S3 resume (sends command to TPM upon resume)
- TPM-specific menu for controlling aspects of the TPM
- [An optional test suite for the TIS interface]

All implementations necessarily follow specifications.

When all patches are applied the following services are available
- SSDT ACPI table for TPM support
- initialization of the TPM upon VM start and S3 resume
- Static root of trust for measurements (SRTM) that measures (some) data
  of SeaBIOS in TCPA ACPI table
- 1ah interrupt handler offering APIs for measuring and sending commands to
  the TPM (trusted grub uses them)
- User menu for controlling aspects of the state of the TPM

 - adapted patches to checkout of 8e30147 (Aug 9)
 - use timeouts/durations for commands as reported by TPM
 - following Andreas Niederl's suggestion regarding the ACPI SSDT

 - adapted patches to checkout of 76b5e71 (June 21)
 - bugfixes (see individual patches)
 - added patch to support the transfer of Qemu-provided measurements via
   firmware interface

 - if ! has_working_tpm() now returns error code everywhere
 - tis_test.c now also under LGPLv3
 - in inthandler, pulled set_cf() out of switch and then only call it in
   the default case where we need to indicate that a function is not

 - some nits here and there
 - calling timer_setup now after S3 resume

 - following Kevin's comment
 - refactoring code so that every patch compiles


More information about the SeaBIOS mailing list