Messages in this thread | | | Date | Fri, 15 Aug 2008 20:37:27 +1000 | From | "Peter Dolding" <> | Subject | Re: [PATCH 1/4] integrity: TPM internel kernel interface |
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On Thu, Aug 14, 2008 at 9:12 PM, Pavel Machek <pavel@suse.cz> wrote: > Hi! > >> > And what happens when the chip simply goes away due to a hotplug action? >> > Or not even the actual chip goes away but just the chip driver and you >> > now dereference freed memory? >> >> Being a TCG/TPM person, I can only address the first question. The >> intent is that the TPM is soldered to the planar/motherboard (the TCG >> uses the phrase "bound to the platform"). I can't imagine >> any manufacturer designing a pluggable TPM. It would subvert PCR > > Only 2 TPMs I've seen were on pluggable modules... which was fortunate > because they slowed down boot by 5+ minutes, and broke it completely > in other cases. Nickname 'kurvitko' (aka useless trash that breaks > stuff). They are currently lying under my table, disconnected. > > (OTOH they were not on PCI, but on some low-count pin header). > Pavel Remember even soldered on stuff can fail. How linux handles the death of the TPM module needs to be covered.
Peter Dolding
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