[PATCH v5 0/6] tpm: Support boot measurements

[Eddie James]

This series adds support for measuring the boot images more generically
than the existing EFI support. Several EFI functions have been moved to
the TPM layer. The series includes optional measurement from the bootm 
command.
A new test case has been added for the bootm measurement to test the new
path, and the sandbox TPM2 driver has been updated to support this use
case.
This series is based on Ilias' auto-startup series:
https://lore.kernel.org/u-boot/20230126081844.591148-1-ilias.apalodimas@linaro.org/

Changes since v4:
 - Remove tcg2_measure_event function and check for NULL data in
   tcg2_measure_data
 - Use tpm_auto_startup
 - Fix efi_tcg2.c compilation for removing tcg2_pcr_read function
 - Change PCR indexes for initrd and dtb
 - Drop u8 casting in measurement test
 - Use bullets in documentation

Changes since v3:
 - Reordered headers
 - Refactored more of EFI code into common code
    Removed digest_info structure and instead used the common alg_to_mask
      and alg_to_len
    Improved event log parsing in common code to get it equivalent to EFI
      Common code now extends PCR if previous bootloader stage couldn't
      No need to allocate memory in the common code, so EFI copies the
      discovered buffer like it did before
    Rename efi measure_event function

Changes since v2:
 - Add documentation.
 - Changed reserved memory address to the top of the RAM for sandbox dts.
 - Add measure state to booti and bootz.
 - Skip measurement for EFI images that should be measured

Changes since v1:
 - Refactor TPM layer functions to allow EFI system to use them, and
   remove duplicate EFI functions.
 - Add test case
 - Drop #ifdefs for bootm
 - Add devicetree measurement config option
 - Update sandbox TPM driver

Eddie James (6):
  tpm: Fix spelling for tpmu_ha union
  tpm: Support boot measurements
  bootm: Support boot measurement
  tpm: sandbox: Update for needed TPM2 capabilities
  test: Add sandbox TPM boot measurement
  doc: Add measured boot documentation

 arch/sandbox/dts/sandbox.dtsi  |   14 +
 arch/sandbox/dts/test.dts      |   13 +
 boot/Kconfig                   |   23 +
 boot/bootm.c                   |   70 +++
 cmd/booti.c                    |    1 +
 cmd/bootm.c                    |    2 +
 cmd/bootz.c                    |    1 +
 configs/sandbox_defconfig      |    1 +
 doc/usage/index.rst            |    1 +
 doc/usage/measured_boot.rst    |   23 +
 drivers/tpm/tpm2_tis_sandbox.c |  100 +++-
 include/bootm.h                |    2 +
 include/efi_tcg2.h             |   44 --
 include/image.h                |    1 +
 include/test/suites.h          |    1 +
 include/tpm-v2.h               |  246 +++++++-
 lib/efi_loader/efi_tcg2.c      | 1010 +++-----------------------------
 lib/tpm-v2.c                   |  771 ++++++++++++++++++++++++
 test/boot/Makefile             |    1 +
 test/boot/measurement.c        |   66 +++
 test/cmd_ut.c                  |    2 +
 21 files changed, 1383 insertions(+), 1010 deletions(-)
 create mode 100644 doc/usage/measured_boot.rst
 create mode 100644 test/boot/measurement.c

-- 
2.31.1