On Fri, Aug 30, 2019 at 02:20:54PM -0700, Tadeusz Struk wrote: > On 8/28/19 9:15 AM, Jason Gunthorpe wrote: > >>> So exposing PCRs and things through sysfs is not going to happen. > >>> > >>> If you had some very narrowly defined things like version, then > >>> *maybe* but I think a well defined use case is needed for why this > >>> needs to be sysfs and can't be done in C as Jarkko explained. > >> Piotr's request for a sysfs file to differentiate between TPM 1.2 and > >> TPM 2.0 is a reasonable request and probably could be implemented on > >> TPM registration. > >> > >> If exposing the PCRs through sysfs is not acceptable, then perhaps > >> suggest an alternative. > > Use the char dev, this is exactly what is is for. > > What about a new /proc entry? > Currently there are /proc/cpuinfo, /proc/meminfo, /proc/slabinfo... > What about adding a new /proc/tpminfo that would print info like > version, number of enabled PCR banks, physical interface [tis|crb], > vendor, etc. I thought we were not really doing new proc entries? Why this focus on making some textual output? Jason
