From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>,
Peter Huewe <peterhuewe@gmx.de>
Cc: tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [tpmdd-devel] [PATCH] tpm: Add sysfs interface to show TPM hardware version
Date: Tue, 14 Mar 2017 14:42:51 -0700 [thread overview]
Message-ID: <1489527771.19081.49.camel@HansenPartnership.com> (raw)
In-Reply-To: <20170314212425.GA29359@obsidianresearch.com>
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
next prev parent reply other threads:[~2017-03-14 21:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-13 5:21 [PATCH] tpm: Add sysfs interface to show TPM hardware version Meng.Li
2017-03-13 7:10 ` Peter Huewe
2017-03-13 7:47 ` Li, Meng
2017-03-14 18:18 ` [tpmdd-devel] " Ken Goldman
2017-03-14 18:58 ` Peter Huewe
2017-03-14 21:24 ` Jason Gunthorpe
2017-03-14 21:42 ` James Bottomley [this message]
2017-03-15 17:25 ` Jason Gunthorpe
2017-03-13 11:48 ` Jarkko Sakkinen
2017-03-13 12:37 ` Li, Meng
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