[PATCH v4 0/8] Add vTPM emulator supportfor ppc64 platform

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

The following series of patches adds vTPM emulator support for the
ppc64 platform (pSeries). 

It can be tested as follows with swtpm/libtpms:

mkdir /tmp/mytpm1
swtpm socket --tpmstate dir=/tmp/mytpm1 \
  --ctrl type=unixio,path=/tmp/mytpm1/swtpm-sock \
  --log level=20

If TPM 2 is desired, add --tpm2 as parameter to the above.

In another terminal start QEMU:

sudo ./ppc64-softmmu/qemu-system-ppc64 -display sdl \
	-machine pseries,accel=kvm \
	-m 1024 -bios slof.bin -boot menu=on \
	-nodefaults -device VGA -device pci-ohci -device usb-kbd \
	-chardev socket,id=chrtpm,path=/tmp/mytpm1/swtpm-sock \
	-tpmdev emulator,id=tpm0,chardev=chrtpm \
	-device tpm-spapr,tpmdev=tpm0 \
	-device spapr-vscsi,id=scsi0,reg=0x00002000 \
	-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-virtio-disk0,id=virtio-disk0 \
	-drive file=test.img,format=raw,if=none,id=drive-virtio-disk0

Links:
 - libtpms: https://github.com/stefanberger/libtpms/wiki
 - swtpm: https://github.com/stefanberger/swtpm/wiki

Changes:
 v3->v4:
  - addressed comments to v3
  - reworked suspend/resume support that requires extensions to backends

 v2->v3:
  - patch 1: a TPM 2 is identified by IBM,vtpm20 in the compatible node
  - patch 1: convert to tracing to display Tx and Rx buffers
  - added documentation patch
  - added patch to enable TPM device as part of pSeries

 v1->v2:
  - followed Cedric Le Goater's suggestions to patch 1
  - send appropriate CRQ error responses if DMA read or write fails
  - renamed tpm_spapr_got_payload to tpm_spapr_process_cmd and
    pass endianess-adjusted data pointer from CRQ to it

Regards,
    Stefan

Stefan Berger (8):
  tpm_spapr: Support TPM for ppc64 using CRQ based interface
  tpm_backend: Implement check whether tpm backend is suspended
  tpm_emulator: Implement callback for whether we are suspended
  tpm_passthrough: Implement callback for whether we are suspended
  tpm: Return bool from tpm_backend_finish_sync
  tpm_spapr: Support suspend and resume
  hw/ppc/Kconfig: Enable TPM_SPAPR as part of PSERIES config
  docs: tpm: Add example command line for ppc64 and tpm-spapr

 backends/tpm.c               |  13 +-
 docs/specs/tpm.txt           |  20 +-
 hw/ppc/Kconfig               |   1 +
 hw/tpm/Kconfig               |   6 +
 hw/tpm/Makefile.objs         |   1 +
 hw/tpm/tpm_emulator.c        |  12 +
 hw/tpm/tpm_passthrough.c     |   6 +
 hw/tpm/tpm_spapr.c           | 460 +++++++++++++++++++++++++++++++++++
 hw/tpm/trace-events          |  14 ++
 include/sysemu/tpm.h         |   3 +
 include/sysemu/tpm_backend.h |  16 +-
 qapi/tpm.json                |   6 +-
 12 files changed, 552 insertions(+), 6 deletions(-)
 create mode 100644 hw/tpm/tpm_spapr.c

-- 
2.21.0