On Fri, 29 Jun 2018 08:20:38 -0400
Stefan Berger <stef...@linux.vnet.ibm.com> wrote:
> On 06/28/2018 01:26 PM, Marc-André Lureau wrote:
> > 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.
>
> The least I could do now is test this... So, I tested this now with the
> SeaBIOS support I have for this series. It's here:
>
> https://github.com/stefanberger/seabios-tpm/tree/qemu-ppi.v6
>
> It works fine with at least an attached TPM 1.2. I haven't tried TPM 2
> yet but would not expect complications from QEMU level. A operation
> request value put into Linux's PPI interface can be read back also after
> a VM suspend / resume operation. The list of supported operations is
> shown correctly (needs Linux extensions for TPM 2 operation values
> beyond a certain number iirc). The request operation is executed
> correctly and the response shows the last operation and its result. So
> it seems to work fine.
>
>
> Stefan
>
Are there any instructions how to test it?
