On Tue, Oct 07, 2014 at 01:54:41PM -0400, Stefan Berger wrote: > On 09/23/2014 12:42 PM, Andy Lutomirski wrote: > >On Sep 22, 2014 2:07 AM, "Peter Huewe" <peterhu...@gmx.de> wrote: > >>Hi, > >> > >>I would like to 'invite' all interested parties in a short TPM minisummit > >>where we can discuss the following hot topics of the TPM subsystem over a > >>beer or two: > >> - State of the TPM Subsystem > >> - De-/Initialization Mess > >> - Devm'ification > >> - Testing > >> - TPM 2.0 Support > >> - Dependencies / interaction with other subsystems (e.g. keyring / IMA) > >> - Status of old 1.1b TPM drivers, deprecation plans > >> - ... > >> > >I am unlikely to be there, but I have a feature request / food for thought: > > > >Using a mandatory userspace daemon (e.g. trousers) for TPM access > >sucks. Might it be possible to teach the kernel to handle context > >save and restore and let multiple processes open the device at once? > >Then a daemon wouldn't be necessary. > > Why add the complexity of swapping of authenticated sessions and keys into > the kernel if you can handle this in userspace? You need a library that is > aware of the number of key slots and slots for sessions in the TPM and swaps > them in at out when applications need them. Trousers is such a library that > was designed to cope with the limitations of the device and make its > functionality available to all applications that want to access it.
One justification might be that kernel is also using TPM? TrouSerS can not manage session for kernel internal use. > Stefan /Jarkko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
