[Qemu-devel] [PATCH V4 0/8] Add TPM support to SeaBIOS

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

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

v4:
 - 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
   implemented

v3:
 - some nits here and there
 - calling timer_setup now after S3 resume

v2:
 - following Kevin's comment
 - refactoring code so that every patch compiles

Regards,
 Stefan