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Re: [Qemu-devel] [PATCH 0/5] Extend TPM support with a QEMU-external TPM


From: Igor Mammedov
Subject: Re: [Qemu-devel] [PATCH 0/5] Extend TPM support with a QEMU-external TPM
Date: Thu, 16 Apr 2015 15:35:06 +0200

On Wed, 15 Apr 2015 18:38:43 -0400
Stefan Berger <address@hidden> wrote:

> The following series of patches extends TPM support with an
> external TPM that offers a Linux CUSE (character device in userspace)
> interface. This TPM lets each VM access its own private vTPM.
> The CUSE TPM supports suspend/resume and migration. Much
> out-of-band functionality necessary to control the CUSE TPM is
> implemented using ioctl's.
> 
> The series extends the TPM support so far that most functionality of
> TPM support on a physical platform is now available to each x86 VM,
> this includes the Physical Presence Interface support that has
> its counter-part in the SeaBIOS and is implemented using ACPI.
> 
> http://www.seabios.org/pipermail/seabios/2015-March/008978.html
is it already merged?

Is it possible to use MMIO region instead of allocating tpm_ppi_anchor
and tpm_ppi in BIOS memory?
That would simplify BIOS part a bit and significantly simplify ACPI code
as most of it is dealing with figuring out address of tpm_ppi.

> 
> 
> Stefan Berger (5):
>   Provide support for the CUSE TPM
>   Support Physical Presence Interface Spec
>   Introduce condition to notifiy waiters of completed command
>   Introduce condition in TPM backend for notification
>   Add support for VM suspend/resume for TPM TIS
> 
>  hmp.c                        |   6 +
>  hw/i386/acpi-tpm-core.dsl    | 277 +++++++++++++++++++++++++++++
>  hw/i386/acpi-tpm2.dsl        |  27 +++
>  hw/i386/q35-acpi-dsdt.dsl    |   1 +
>  hw/i386/ssdt-tpm.dsl         |  12 +-
>  hw/tpm/tpm_int.h             |   4 +
>  hw/tpm/tpm_ioctl.h           | 178 +++++++++++++++++++
>  hw/tpm/tpm_passthrough.c     | 410 
> +++++++++++++++++++++++++++++++++++++++++--
>  hw/tpm/tpm_tis.c             | 152 +++++++++++++++-
>  hw/tpm/tpm_tis.h             |   2 +
>  hw/tpm/tpm_util.c            | 206 ++++++++++++++++++++++
>  hw/tpm/tpm_util.h            |   7 +
>  include/sysemu/tpm_backend.h |  12 ++
>  qapi-schema.json             |  17 +-
>  qemu-options.hx              |  21 ++-
>  qmp-commands.hx              |   2 +-
>  tpm.c                        |  11 +-
>  17 files changed, 1316 insertions(+), 29 deletions(-)
>  create mode 100644 hw/i386/acpi-tpm-core.dsl
>  create mode 100644 hw/i386/acpi-tpm2.dsl
>  create mode 100644 hw/tpm/tpm_ioctl.h
> 




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