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Date: Mon, 4 Jun 2018 22:55:54 +0300
From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Tadeusz Struk <tadeusz.struk@intel.com>
Cc: jgg@ziepe.ca, linux-integrity@vger.kernel.org
Subject: Re: [PATCH] tpm: add support for nonblocking operation
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On Thu, May 31, 2018 at 04:29:09PM -0700, Tadeusz Struk wrote:
> The TCG SAPI specification [1] defines a set of functions, which allows
> applications to use the TPM device in either blocking or non-blocking fashion.
> Each command defined by the specification has a corresponding
> Tss2_Sys_<COMMAND>_Prepare() and Tss2_Sys_<COMMAND>_Complete() call, which
> together with Tss2_Sys_ExecuteAsync() is designed to allow asynchronous
> mode of operation. Currently the driver supports only blocking calls, which
> doesn't allow asynchronous operation. This patch changes it and adds support
> for nonblocking write and a new poll function to enable applications using
> the API as designed by the spec.
> The new functionality can be tested using standard TPM tools implemented
> in [2], with modified TCTI from [3].

I would need some statistics before I have interest to take these
changes in any form eg use case where this matters in the end.

/Jarkko