On Sat, 2018-12-22 at 14:47 +0100, Michael Niewöhner wrote: > When I remove the timeout and boot directly to the linux kernel, I get that > "2314 TPM-self test error" since it has not finished, yet. The TPM is detected > by IMA and works fine then. > > Some more tests showed that any delay before booting the kernel causes the TPM > to not get detected. I tested, 10, 15, 20, 30, 60... seconds. Only in some very > rare cases the TPM got detected. > > I wanted to know if the TPM is in an well initialized state at the time of that > error. Since I was not able to get some test/debug kernel patches working I > decided to try kexec. It turned out that the TPM is indeed correctly working and > will be detected just fine by linux after kexec! No surprise here. kexec would be the equivalent of a soft reboot. > > Is there anyone having an idea what could be wrong here? I am willing to debug > this but I have really no idea where to start :-( A while ago, I was "playing" with a pi. Commenting out tpm2_do_selftest() seemed to resolve a similar problem, but that was before James' patches. I don't know if that would make a difference now. Mimi
