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* [PATCH 0/2 v2] tpm: add update_durations class op to allow override of chip supplied values
@ 2019-08-28  0:46 Jerry Snitselaar
  2019-08-28  0:46 ` [PATCH 1/2 v2] tpm: provide a way to override the chip returned durations Jerry Snitselaar
  2019-08-28  0:46 ` [PATCH 2/2 v2] tpm_tis: override durations for STM tpm with firmware 1.2.8.28 Jerry Snitselaar
  0 siblings, 2 replies; 9+ messages in thread
From: Jerry Snitselaar @ 2019-08-28  0:46 UTC (permalink / raw)
  To: linux-integrity
  Cc: linux-kernel, Peter Huewe, Jarkko Sakkinen, Jason Gunthorpe

We've run into a case where a customer has an STM TPM 1.2 chip
(version 1.2.8.28) that is getting into an inconsistent state and
they end up getting tpm transmit errors.  In really old tpm code this
wasn't seen because the code that grabbed the duration values from the
chip could fail silently, and would proceed to just use default values
and move forward. More recent code though successfully gets the
duration values from the chip, and using those values this particular
chip version gets into the state seen by the customer.

The idea with this patchset is to provide a facility like the
update_timeouts operation to allow the override of chip supplied
values.

I went back and looked at the original submission thread, and updated
Alexey's patches based on Jarkko's suggestions for v2.



^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2019-08-29 22:23 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-28  0:46 [PATCH 0/2 v2] tpm: add update_durations class op to allow override of chip supplied values Jerry Snitselaar
2019-08-28  0:46 ` [PATCH 1/2 v2] tpm: provide a way to override the chip returned durations Jerry Snitselaar
2019-08-29 13:27   ` Jarkko Sakkinen
2019-08-28  0:46 ` [PATCH 2/2 v2] tpm_tis: override durations for STM tpm with firmware 1.2.8.28 Jerry Snitselaar
2019-08-29 14:40   ` Jarkko Sakkinen
2019-08-29 14:41     ` Jarkko Sakkinen
2019-08-29 18:04       ` Jerry Snitselaar
2019-08-29 20:25     ` Jerry Snitselaar
2019-08-29 22:23       ` Jarkko Sakkinen

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