On Thu Mar 14, 2024 at 6:31 PM EET, Adam Alves wrote: > Hi Jarkko, > > I have an update here. I would like you to check if it makes sense > before I submit a patch. > > The problem might be related to the chip itself which leaves the idle > state whenever the locality is relinquished. There's no real discrete chip. It is a TPM living in the firmware, namely management engine. So first thing to check would be to update the BIOS entirely. > I probed the chip while operating and noted that the > TPM_CRB_CTRL_STS_0.tpmIdle bit (located at `regs_t->ctrl_sts` on > `crb_priv` structure in tpm_crb.c) is always cleared whenever the > locality is relinquished. > > The result is that this chip never becomes idle since after going idle > the locality is relinquished (`tpm_chip_stop` function in tpm-chip.c). This can be verified as tpm_crb does print "goIdle timed out" if it does not go to idle. Should be visible in klog. BR, Jarkko
