Hi, The following patches implement the TPM Physical Presence Interface that allows a user to set a command via ACPI (sysfs entry in Linux) that, upon the next reboot, the firmware looks for and acts upon by sending sequences of commands to the TPM.
A dedicated memory region is added to the TPM CRB & TIS devices, at address/size 0xFED45000/0x400. A new "etc/tpm/config" fw_cfg entry holds the location for that PPI region and some version details, to allow for future flexibility. With the associated edk2/ovmf firmware, the Windows HLK "PPI 1.3" test now runs successfully. It is based on previous work from Stefan Berger ("[PATCH v2 0/4] Implement Physical Presence interface for TPM 1.2 and 2") The edk2 support is merged upstream. v4: - add a "ppi" property, default to true, unless machine <= 2.12 - pass PPI address to tpm_ppi_init_io() - renamed tpm_ppi struct name Marc-André Lureau (2): tpm: add a "ppi" boolean property tpm: add a fake ACPI memory clear interface Stefan Berger (3): tpm: implement virtual memory device for TPM PPI acpi: add fw_cfg file for TPM and PPI virtual memory device acpi: build TPM Physical Presence interface hw/tpm/tpm_ppi.h | 27 ++++ include/hw/acpi/tpm.h | 30 ++++ include/hw/compat.h | 10 ++ hw/i386/acpi-build.c | 320 ++++++++++++++++++++++++++++++++++++++++++ hw/tpm/tpm_crb.c | 10 ++ hw/tpm/tpm_ppi.c | 57 ++++++++ hw/tpm/tpm_tis.c | 10 ++ docs/specs/tpm.txt | 20 +++ hw/tpm/Makefile.objs | 2 +- hw/tpm/trace-events | 4 + 10 files changed, 489 insertions(+), 1 deletion(-) create mode 100644 hw/tpm/tpm_ppi.h create mode 100644 hw/tpm/tpm_ppi.c -- 2.18.0.rc1