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. Thanks, -- Tadeusz
