On 24 October 2017 at 23:07, Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> wrote: > On Tue, Oct 24, 2017 at 10:02:00AM -0700, Dmitry Torokhov wrote: >> tpm-rng is abomination that should be kicked out as soon as possible. >> It wrecks havoc with the power management (TPM chip drivers may go >> into suspend state, but tpm_rng does not do any power management and >> happily forwards requests to suspended hardware) and may be available >> when there is no TPM at all yet (the drivers have not been probed yet, >> or have gotten a deferral, etc). > > Makes sense > >> TPM core should register HWRNGs when chips are ready. > > The main thing I've wanted from the TPM RNG is > 'add_early_randomness'.. > > We can certainly provide a TPM interface to hwrng, it seems > reasonable. > > Excep that we already have a user api in /dev/tpm to access the > tpm RNG, is the duplication a problem? I tried to do that via the rfc we discussed previously. It may not be the right way but I wanted to start the discussion via the rfc. Thanks, PrasannaKumar
