[Qemu-devel] [PATCH 0/5] TPM device emulation

[Andreas Niederl]

Hi,

This patch series introduces TPM device emulation in QEMU.

The emulation is divided into a device frontend implementing the TPM TIS 1.2
interface (specification available at [1]) and a framework for implementation
specific backend drivers which are used by the frontend.

A backend driver for direct passthrough of a TPM device using the host driver
on a Linux system is provided and is enabled by passing
'-tpm type=host,path=...,id=...' to QEMU.

Since the Linux TPM driver requires blocking I/O to the TPM device, a custom
thread or a threadlet (using the threadlet patch series on this list, see
last patch) is needed for handling I/O operations in the host backend.


The frontend is integrated into the qdev device framework and can be enabled
using the '-device' argument specifying a valid backend driver, e.g.:
  qemu ... -tpm type=host,path=/dev/tpm0,id=tpm0 -device tpm,backend=tpm0

When the frontend is enabled, a SSDT ACPI table containing the device
description for hotplugging is loaded using the fw_cfg runtime configuration
interface to SeaBIOS.


This device emulation can be tested by loading an image and installing the
jTPMTools and the jTSS stack which ships a set of unit tests itself and is
available on [2].

Testing can also be done using the character device provided by the
TPM emulator [3] with the tpmd_dev kernel module.


This patch series is used in the acTvSM trusted virtualization platform which
also is available on [2].


Regards,
Andreas Niederl

[1] https://www.trustedcomputinggroup.org/
[2] http://trustedjava.sourceforge.net/
[3] http://tpm-emulator.berlios.de/


Andreas Niederl (5):
  Add TPM 1.2 device interface
  Provide SSDT for enabled TPM device
  Add TPM host passthrough device backend.
  Add configure script and command line options for TPM interface.
  Adapt TPM host backend to use threadlets

 Makefile.objs         |    3 +
 Makefile.target       |    3 +
 configure             |    9 +
 hw/acpi.c             |   28 ++
 hw/pc.h               |    1 +
 hw/tpm.h              |   24 ++
 hw/tpm_acpi.c         |   40 +++
 hw/tpm_backend.c      |   78 ++++++
 hw/tpm_host_backend.c |  235 ++++++++++++++++
 hw/tpm_int.h          |   56 ++++
 hw/tpm_ssdt.dsl       |   55 ++++
 hw/tpm_ssdt.hex       |   41 +++
 hw/tpm_tis.c          |  706 +++++++++++++++++++++++++++++++++++++++++++++++++
 qemu-config.c         |   16 ++
 qemu-config.h         |    1 +
 qemu-options.hx       |    6 +
 rules.mak             |    7 +-
 vl.c                  |   45 +++
 18 files changed, 1353 insertions(+), 1 deletions(-)
 create mode 100644 hw/tpm.h
 create mode 100644 hw/tpm_acpi.c
 create mode 100644 hw/tpm_backend.c
 create mode 100644 hw/tpm_host_backend.c
 create mode 100644 hw/tpm_int.h
 create mode 100644 hw/tpm_ssdt.dsl
 create mode 100644 hw/tpm_ssdt.hex
 create mode 100644 hw/tpm_tis.c

-- 
1.7.4.1