On Mon, 31 Jul 2023 10:14:05 +0000 "Jarkko Sakkinen" jarkko@kernel.org wrote:
On Fri Jul 28, 2023 at 8:18 PM UTC, Daniil Stas wrote:
On Fri, 28 Jul 2023 19:30:18 +0000 "Jarkko Sakkinen" jarkko@kernel.org wrote:
On Thu Jul 27, 2023 at 3:38 PM UTC, Daniil Stas wrote:
[...]
This is needs a bit more elaboration in order to be comprehended.
Do you mean by "stutter" unexpected delays and when do they happen?
BR, Jarkko
Yes, unexpected delays. They just happen randomly. You can google "AMD fTPM stuttering", there are a lot of examples. Here is one: https://www.youtube.com/watch?v=TYnRL-x6DVI
What if you make tpm_amd_is_rng_defective() to unconditonally return true? Does this make the problem dissappear, or not?
BR, Jarkko
I already tried compiling kernel without CONFIG_HW_RANDOM_TPM enabled, which does the same. Yes, it removes the issue.