[Qemu-devel] [PATCH 0/4] tpm: Provide a software vTPM

[Corey Bryant]

This patch series provides support for a software Trusted Platform
Module (otherwise known as a vTPM).  This support is provided via a
new backend that works with the existing QEMU tpm-tis front end.

With this patch series, multiple guests can run with their own vTPM.
In comparison, the existing passthrough vTPM does not allow this
because the host TPM cannot be shared.

Note: There is seabios code that is not yet upstream that is
required to run with this support.  It provides support such as
initialization, ACPI table updates, and menu updates.  If anyone
would like to run with that support, let me know and I can send you
a bios.bin.

Following is a sample command line:

qemu-img create -f qcow2 /home/qemu/images/nvram.qcow2 500K

qemu-system-x86_64 ... \
-drive file=/home/qemu/images/nvram.qcow2,if=none,id=nvram0-0-0,format=qcow2 \
-device tpm-tis,tpmdev=tpm-tpm0,id=tpm0 \
-tpmdev libtpms,id=tpm-tpm0,nvram=nvram0-0-0

Corey Bryant (4):
  tpm: Add TPM NVRAM implementation
  tpm: Share tpm_write_fatal_error_response
  tpm: QMP/HMP support for libtpms TPM backend
  tpm: Provide libtpms software TPM backend

 configure                    |   24 ++
 hmp.c                        |    5 +
 hw/tpm/Makefile.objs         |    2 +
 hw/tpm/tpm_libtpms.c         |  885 ++++++++++++++++++++++++++++++++++++++++++
 hw/tpm/tpm_nvram.c           |  340 ++++++++++++++++
 hw/tpm/tpm_nvram.h           |   25 ++
 hw/tpm/tpm_passthrough.c     |   14 -
 hw/tpm/tpm_tis.h             |    1 +
 include/sysemu/tpm_backend.h |    3 +
 qapi-schema.json             |   18 +-
 qemu-options.hx              |   31 ++-
 tpm.c                        |   28 ++-
 12 files changed, 1357 insertions(+), 19 deletions(-)
 create mode 100644 hw/tpm/tpm_libtpms.c
 create mode 100644 hw/tpm/tpm_nvram.c
 create mode 100644 hw/tpm/tpm_nvram.h