From: Ken Goldman <kgold@linux.ibm.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Petr Vorel <pvorel@suse.cz>
Cc: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
linux-integrity@vger.kernel.org
Subject: Re: [PATCH v3 0/4] TPM 2.0 fixes in IMA tests
Date: Tue, 6 Oct 2020 13:37:40 -0400 [thread overview]
Message-ID: <ebf16375-39af-d09c-effd-4fa072394057@linux.ibm.com> (raw)
In-Reply-To: <20201006155505.GB111447@linux.intel.com>
On 10/6/2020 11:55 AM, Jarkko Sakkinen wrote:
> On Tue, Oct 06, 2020 at 12:01:30PM +0200, Petr Vorel wrote:
>> If I understand James's commit fdc915f7f719 ("tpm: expose spaces via a device link /dev/tpmrm<n>")
>> from v4.12-rc1 correctly /dev/tpmrm0 is really for TPM 2.0. But how to detect it
>> for v4.0 - v4.11 when /sys/class/tpm detection fails?
>
> I'd send an idempotent TPM2 command to /dev/tpm0. I.e. if it works,
> it does not change the state. If it doesn't, you know that it is
> not TPM2 device.
>
> See the kernel function tpm2_probe() as an example of this approach.
>
As good candidate is getcapability, because it is guaranteed never to
require authorization.
prev parent reply other threads:[~2020-10-06 17:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 16:50 [PATCH v3 0/4] TPM 2.0 fixes in IMA tests Petr Vorel
2020-09-29 16:50 ` [LTP] " Petr Vorel
2020-09-29 16:50 ` [PATCH v3 1/4] IMA: Move get_algorithm_digest(), set_digest_index() to ima_setup.sh Petr Vorel
2020-09-29 16:50 ` [LTP] " Petr Vorel
2020-09-29 16:50 ` [PATCH v3 2/4] IMA: Rewrite ima_boot_aggregate.c to new API Petr Vorel
2020-09-29 16:50 ` [LTP] " Petr Vorel
2020-09-29 21:39 ` Mimi Zohar
2020-09-29 21:39 ` [LTP] " Mimi Zohar
2020-09-30 6:53 ` Petr Vorel
2020-09-30 6:53 ` [LTP] " Petr Vorel
2020-09-29 16:50 ` [PATCH v3 3/4] ima_tpm.sh: Fix calculating boot aggregate Petr Vorel
2020-09-29 16:50 ` [LTP] " Petr Vorel
2020-09-29 20:46 ` Mimi Zohar
2020-09-29 20:46 ` [LTP] " Mimi Zohar
2020-09-29 16:50 ` [PATCH v3 4/4] ima_tpm.sh: Fix calculating PCR aggregate Petr Vorel
2020-09-29 16:50 ` [LTP] " Petr Vorel
2020-09-29 19:01 ` Mimi Zohar
2020-09-29 19:01 ` [LTP] " Mimi Zohar
2020-09-29 16:53 ` [LTP] [PATCH v3 0/4] TPM 2.0 fixes in IMA tests Petr Vorel
2020-09-29 21:56 ` Mimi Zohar
2020-09-29 23:11 ` Jarkko Sakkinen
2020-09-29 23:11 ` [LTP] " Jarkko Sakkinen
2020-09-30 5:53 ` Petr Vorel
2020-09-30 5:53 ` [LTP] " Petr Vorel
2020-09-30 11:59 ` Jarkko Sakkinen
2020-09-30 11:59 ` [LTP] " Jarkko Sakkinen
2020-10-01 12:01 ` Petr Vorel
2020-10-01 12:01 ` [LTP] " Petr Vorel
2020-10-01 18:31 ` Jarkko Sakkinen
2020-10-01 18:31 ` [LTP] " Jarkko Sakkinen
2020-10-06 10:01 ` Petr Vorel
2020-10-06 15:53 ` Jarkko Sakkinen
2020-10-06 15:55 ` Jarkko Sakkinen
2020-10-06 17:37 ` Ken Goldman [this message]
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