On Tue, 2017-03-14 at 15:24 -0600, Jason Gunthorpe wrote: > On Tue, Mar 14, 2017 at 07:58:37PM +0100, Peter Huewe wrote: > > > > In practice, I suspect that a single user space application won't > > > support both TPMs. > > Think of init scripts. > > Which daemon should it start? > > Right, ideally we'd have a udev rule that triggers systemd to start > the userspace daemons when a TPM is detected, as other hardware does. > > So whatever format we use has to be compatible with udev's matcher..
Technically, we have that already: my TPM2.0 detection stuff for udev triggers off the presence of the SUBSYSTEM=="tpmrm" that matches any TPM2 device but not a 1.x one. James
