From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: "Michael Niewöhner" <linux@mniewoehner.de>
Cc: Mimi Zohar <zohar@linux.ibm.com>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
peterhuewe@gmx.de, jgg@ziepe.ca, arnd@arndb.de,
linux-integrity@vger.kernel.org,
linux-kernel <linux-kernel@vger.kernel.org>,
Nayna Jain <nayna@linux.ibm.com>,
Ken Goldman <kgold@linux.ibm.com>
Subject: Re: tpm_tis TPM2.0 not detected on cold boot
Date: Thu, 3 Jan 2019 15:27:37 +0200 [thread overview]
Message-ID: <20190103132737.GD10491@linux.intel.com> (raw)
In-Reply-To: <e7ec38d7cade9aa76384aa2781eab307d2cd5a7b.camel@mniewoehner.de>
On Sun, Dec 23, 2018 at 12:55:12PM +0100, Michael Niewöhner wrote:
> There is another issue but I don't know if both are related. Maybe that's just a
> timing issue...
>
> root@debian:~# dd if=/dev/hwrng bs=1 count=1
> dd: error reading '/dev/hwrng': Operation not permitted
> 0+0 records in
> 0+0 records out
> 0 bytes copied, 0.755958 s, 0.0 kB/s
> root@debian:~# dd if=/dev/hwrng bs=1 count=1 | xxd; dd if=/dev/hwrng bs=1
> count=1 | xxd
> dd: error reading '/dev/hwrng': Operation not permitted
> 0+0 records in
> 0+0 records out
> 0 bytes copied, 0.755697 s, 0.0 kB/s
> 1+0 records in
> 1+0 records out
> 00000000: 52 R
> 1 byte copied, 0.0106268 s, 0.1 kB/s
>
>
> Michael
What does /sys/devices/virtual/misc/hw_random/rng_current show?
Did run commands as a sanity check on my laptop and seem to work.
/Jarkko
next prev parent reply other threads:[~2019-01-03 13:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-16 13:32 tpm_tis TPM2.0 not detected on cold boot Michael Niewöhner
2018-12-22 13:47 ` Michael Niewöhner
2018-12-22 22:53 ` Mimi Zohar
2018-12-23 11:55 ` Michael Niewöhner
2018-12-25 13:55 ` Michael Niewöhner
2018-12-30 3:33 ` Mimi Zohar
2018-12-30 13:22 ` Michael Niewöhner
2018-12-31 18:10 ` Ken Goldman
2018-12-31 21:17 ` Mimi Zohar
2019-01-01 16:15 ` Michael Niewöhner
2019-01-01 16:38 ` Mimi Zohar
2019-01-01 16:47 ` Michael Niewöhner
2018-12-31 17:56 ` Ken Goldman
2019-01-03 13:27 ` Jarkko Sakkinen [this message]
2019-01-03 13:38 ` Michael Niewöhner
2019-01-03 15:04 ` Jarkko Sakkinen
2019-01-03 15:47 ` Michael Niewöhner
2019-01-04 11:58 ` Michael Niewöhner
2019-01-04 15:28 ` Michael Niewöhner
2019-01-04 18:26 ` Michael Niewöhner
2019-01-10 17:28 ` Jarkko Sakkinen
2019-01-10 18:03 ` Michael Niewöhner
2019-01-10 17:19 ` Jarkko Sakkinen
2019-01-10 18:00 ` Michael Niewöhner
2019-01-03 13:41 ` Jarkko Sakkinen
2019-01-03 13:55 ` Michael Niewöhner
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