lkml.org 
[lkml]   [2019]   [Jun]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v6 2/2] fTPM: add documentation for ftpm driver
On Tue, Jun 25, 2019 at 12:59:02PM -0700, Randy Dunlap wrote:
>On 6/25/19 12:52 PM, Sasha Levin wrote:
>> This patch adds basic documentation to describe the new fTPM driver.
>>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>> ---
>> Documentation/security/tpm/index.rst | 1 +
>> Documentation/security/tpm/tpm_ftpm_tee.rst | 31 +++++++++++++++++++++
>> 2 files changed, 32 insertions(+)
>> create mode 100644 Documentation/security/tpm/tpm_ftpm_tee.rst
>>
>> diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst
>> index af77a7bbb070..15783668644f 100644
>> --- a/Documentation/security/tpm/index.rst
>> +++ b/Documentation/security/tpm/index.rst
>> @@ -4,4 +4,5 @@ Trusted Platform Module documentation
>>
>> .. toctree::
>>
>> + tpm_ftpm_tee
>> tpm_vtpm_proxy
>> diff --git a/Documentation/security/tpm/tpm_ftpm_tee.rst b/Documentation/security/tpm/tpm_ftpm_tee.rst
>> new file mode 100644
>> index 000000000000..29c2f8b5ed10
>> --- /dev/null
>> +++ b/Documentation/security/tpm/tpm_ftpm_tee.rst
>> @@ -0,0 +1,31 @@
>> +=============================================
>> +Firmware TPM Driver
>> +=============================================
>> +
>> +| Authors:
>> +| Thirupathaiah Annapureddy <thiruan@microsoft.com>
>> +| Sasha Levin <sashal@kernel.org>
>> +
>> +This document describes the firmware Trusted Platform Module (fTPM)
>> +device driver.
>> +
>> +Introduction
>> +============
>> +
>> +This driver is a shim for a firmware implemented in ARM's TrustZone
>
> for firmware
>
>> +environment. The driver allows programs to interact with the TPM in the same
>> +way the would interact with a hardware TPM.
>
> they
>
>> +
>> +Design
>> +======
>> +
>> +The driver acts as a thin layer that passes commands to and from a TPM
>> +implemented in firmware. The driver itself doesn't contain much logic and is
>> +used more like a dumb pipe between firmware and kernel/userspace.
>> +
>> +The firmware itself is based on the following paper:
>> +https://www.microsoft.com/en-us/research/wp-content/uploads/2017/06/ftpm1.pdf
>> +
>> +When the driver is loaded it will expose ``/dev/tpmX`` character devices to
>> +userspace which will enable userspace to communicate with the firmware tpm
>
> TPM
>
>> +through this device.
>>
>
>Oh, that's the same comments that I made on 2019-06-18:
>https://marc.info/?l=linux-integrity&m=156087157019368&w=2

Appologies Randy, I've missed it. I'll send a new ver in a moment.
Thanks!

--
Thanks,
Sasha

\
 
 \ /
  Last update: 2019-06-25 22:03    [W:0.029 / U:6.996 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site