Re: [tpmdd-devel] Looking for Lenovo Thinkpad x200s TPM Chip ID

[Marcin O. <mar...@us...>]

2008/12/5 Tom Lendacky <to...@us...>:
> "Marcin Obara" <mar...@us...> wrote on 12/05/2008
> 01:17:07 PM:
>> 2008/12/5 Tom Lendacky <to...@us...>:
>> > The TCG has defined the specification for a TPM 1.2 device and any
>> > device
>> > driver written to the 1.2 specification is supposed to work with any TPM
>> > 1.2 device. [...]  If a dedicated
>> > driver is required then the device is not compliant to the TPM 1.2 spec.
>> Current tpm_tis driver does not cover all possible TPM 1.2 compliant
>> HW implementations.
>> You can create TPM 1.2 compatible device that will not work with
>> current tpm_tis driver.
>
> Please document any discrepancies in the tpm_tis driver with a post to this
> list so that they can be addressed/fixed.  Or even better, please create
> patches to address any problems in the tpm_tis driver and post them to this
> list and the kernel mailing list so that they can be incorporated into the
> kernel.

Tom,
I did not said that there are problems to be fixed.
I just said that it is possible to create TPM 1.2 compliant hardware,
which will require dedicated driver.
For example, its is not required for TPM to be in post-TPM_Startup
state, while loading driver
(at least in theory). TPM_Startup ordinal must be send by trusted
entity, but it is not specified when (from OS/driver point of view).

Regards
Marcin