[dgarske]

Description

Adds --enable-pikeos (CMake WOLFTPM_INTERFACE=PIKEOS) for PikeOS, where the TPM driver is reached through the file provider (vm_open/vm_write/vm_read) and takes whole TPM commands, like the Linux /dev/tpm0 transport.

• src/tpm2_pikeos.c, wolftpm/tpm2_pikeos.h: the transport. The device defaults to tpm0:dev0; override with TPM2_PIKEOS_DEV.
• No TIS layer: TPM2_IoCb is NULL and the driver owns locality. wolfTPM still sends TPM2_Startup.
• wolftpm/tpm2_types.h, examples/tpm_test.h: sleep and time helpers using p4_sleep/p4_get_time.
• CI: compile-only job with stub p4.h/vm.h.

Testing

Cross-compiled with the PikeOS 5.1 x86_64 SDK. Tested on a PikeOS target with an Infineon SLB9670 behind the PikeOS TPM driver: caps and wrap_test pass.

[Copilot]

🟡 Changes recommended

Truncated PikeOS TPM responses can pass validation and return stale buffer contents as randomness, while cleanup can leak device descriptors for inactive contexts.

2 open issues

• Truncated responses can expose stale bytes as random data · New
• PikeOS descriptor leaks when cleaning up an inactive context · New

What changed in this PR

Adds PikeOS as a whole-command TPM transport, integrating its file-provider driver into wolfTPM without a TIS callback.

Changes:

• Adds device I/O and cleanup through PikeOS vm_* APIs.
• Integrates transport selection, driver-owned locality, and PikeOS timing helpers.
• Adds build options, usage documentation, and compile-only CI with SDK stubs.

File	Description
wolftpm/​tpm2.h	Adds per-context PikeOS device state.
wolftpm/​tpm2_types.h	Adds PikeOS timeout and timing helpers.
wolftpm/​tpm2_pikeos.h	Declares transport and cleanup functions.
wolftpm/​include.am	Includes the PikeOS header in installation.
src/​tpm2.c	Connects PikeOS dispatch, cleanup, and initialization.
src/​tpm2_wrap.c	Adapts initialization, locality, and firmware-update paths.
src/​tpm2_spdm.c	Excludes PikeOS from TIS-based SPDM I/O.
src/​tpm2_pikeos.c	Implements file-provider command transport.
src/​include.am	Adds the transport to Autotools sources.
hal/​tpm_io.h	Defines a null I/O callback for PikeOS.
hal/​tpm_io.c	Excludes callback implementation for PikeOS.
examples/​tpm_test.h	Adds PikeOS example timing support.
docs/​hal-io-callback.md	Lists PikeOS as a system interface.
docs/​getting-started.md	Documents PikeOS disabling software-backend defaults.
docs/​build-options.md	Documents configuration and runtime prerequisites.
configure.ac	Adds PikeOS selection and compatibility checks.
CMakeLists.txt	Adds the PIKEOS interface option and source.
.github/​workflows/​pikeos-build.yml	Adds normal and debug compile checks using SDK stubs.

_{Review effort: Balanced}