Messages in this thread | | | From | <> | Subject | RE: [tpmdd-devel] [PATCH] tpm: add documentation for sysfs interfaces | Date | Mon, 12 Nov 2012 16:36:49 +0000 |
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Hi Kent,
> > > +What: /sys/class/misc/tpmX/device/active > > > +Date: April 2006 > > > +KernelVersion: 2.6.17 > > > +Contact: tpmdd-devel@lists.sf.net > > > +Description: The "active" property prints a '1' if the TPM chip is accepting > > > + commands. An inactive TPM chip still contains all the state of > > > + an active chip (Storage Root Key, NVRAM, etc), and can be > > > + visible to the OS, but will not accept commands. > > > > Hmm, I know this is a tricky one (enabled/activated). > > maybe this would be better as: > > - visible to the OS, but will not accept commands. > > + visible to the OS, but will only accept a restricted set of commands. > > + See TCG specification(...) for more information. > > Yeah that's more accurate. I'm just inclined to point to the design > principles and structures spec here unless you have a better idea. Both > have enabled/activated info scattered throughout them. Sigh. :) >
Maybe refer to TPM Main - Part 2 TPM Structures_v1.2_rev116 - Section 17 The table of ordinals there has a special column named 'Avail Disabled' and 'Avail Deactivated' which describes quite good which commands can be used and which not.
Thanks, Peter
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