Re: [PATCH] tpm-emulator: add a TPM emulator pass through

[Stefan Berger <stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>]

On 01/09/2017 12:14 PM, Jason Gunthorpe wrote:
>>> Not sure I see it, surely running a program in userspace is simpler
>>> than patching the kernel?
>> Heh, is that a serious question to a kernel developer?  If the program
>> actually existed, sure, but does it?
> Stefan has something to connect vtpm to a TPM2 emulator.

https://github.com/stefanberger/linux-vtpm-tests

#> ./src/vtpmctrl --help

This is a test tool for the Linux vTPM proxy driver

Usage: ./src/vtpmctrl options

The following options are supported:
--tpm2                 : A TPM 2 is used

--exit-on-user-request : The tool exits upon a request issued by the user.

--spawn program prg-params...
                        : Spawn the given program and pass to it the
                          file descriptor on which to listen for TPM
                          commands. If a parameter '%fd' appears among
                          the prg-params passed to the program, it will
                          be replaced by that file descriptor number.

                          This option must be the last option passed.

--help|-h|-?           : Display this help screen and exit.

Examples:
./src/vtpmctrl --tpm2 \
   --spawn /bin/swtpm chardev --tpm2 --fd %fd --tpmstate dir=/tmp

./src/vtpmctrl \
   --spawn /bin/swtpm chardev --fd %fd --tpmstate dir=/tmp



     Stefan


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