From: Tadeusz Struk <tadeusz.struk@intel.com>
To: Jason Gunthorpe <jgg@ziepe.ca>, Mimi Zohar <zohar@linux.ibm.com>
Cc: "Piotr Król" <piotr.krol@3mdeb.com>, linux-integrity@vger.kernel.org
Subject: Re: TPM 2.0 Linux sysfs interface
Date: Fri, 30 Aug 2019 14:20:54 -0700 [thread overview]
Message-ID: <f7e1f25a-8b2d-1e0e-e784-0908161c3c99@intel.com> (raw)
In-Reply-To: <20190828161502.GC933@ziepe.ca>
On 8/28/19 9:15 AM, Jason Gunthorpe wrote:
>>> So exposing PCRs and things through sysfs is not going to happen.
>>>
>>> If you had some very narrowly defined things like version, then
>>> *maybe* but I think a well defined use case is needed for why this
>>> needs to be sysfs and can't be done in C as Jarkko explained.
>> Piotr's request for a sysfs file to differentiate between TPM 1.2 and
>> TPM 2.0 is a reasonable request and probably could be implemented on
>> TPM registration.
>>
>> If exposing the PCRs through sysfs is not acceptable, then perhaps
>> suggest an alternative.
> Use the char dev, this is exactly what is is for.
What about a new /proc entry?
Currently there are /proc/cpuinfo, /proc/meminfo, /proc/slabinfo...
What about adding a new /proc/tpminfo that would print info like
version, number of enabled PCR banks, physical interface [tis|crb],
vendor, etc.
Thanks,
--
Tadeusz
next prev parent reply other threads:[~2019-08-30 21:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 23:24 TPM 2.0 Linux sysfs interface Piotr Król
2019-08-27 1:05 ` Jason Gunthorpe
2019-08-28 15:53 ` Mimi Zohar
2019-08-28 16:15 ` Jason Gunthorpe
2019-08-30 21:20 ` Tadeusz Struk [this message]
2019-09-02 19:26 ` Jason Gunthorpe
2019-09-02 21:35 ` Mimi Zohar
2019-09-03 5:55 ` Jason Gunthorpe
2019-09-03 11:49 ` Mimi Zohar
2019-09-03 13:07 ` Jason Gunthorpe
2019-09-03 13:23 ` Mimi Zohar
2019-09-03 16:21 ` Jarkko Sakkinen
2019-09-03 16:23 ` Tadeusz Struk
2019-09-03 22:40 ` Jordan Hand
2019-09-03 23:29 ` Mimi Zohar
2019-09-04 5:58 ` Jason Gunthorpe
2019-09-04 11:30 ` Mimi Zohar
2019-09-04 19:43 ` Jason Gunthorpe
2019-09-04 20:26 ` Mimi Zohar
2019-09-06 17:53 ` Serge E. Hallyn
2019-08-28 15:03 ` Mimi Zohar
2019-08-28 17:15 ` Petr Vorel
2019-08-28 23:22 ` Piotr Król
2019-08-29 7:32 ` Petr Vorel
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