Difference between revisions of "Intel GM45 TPM device iTPM INTC0102"
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Revision as of 01:40, 4 April 2009
INTC0102 Intel TPM device found in GM45 chipset is supposed to comply to TCG TPM 1.2 specifications, and thus be taken care of by tpm_tis kernel module. Unfortunately, it is not. After loading this module
modprobe tpm_tis interrupts=0 force=1
and mounting securityfs
mount -t securityfs none /sys/kernel/security
it is possible to read the files
/sys/kernel/security/tpm0/ascii_bios_measurements /sys/kernel/security/tpm0/binary_bios_measurements
but nothing else seems to be possible.
In recent discussion on tpmdd-devel mailing list Seiji Munetoh suggested a quick fix, and Colin Didier made a patch out of it.
Now it is working, although I am still struggling to come up with an idea how would I use this TPM device :). Note, however, that tpm_tis has to be compiled as a module and unloaded before any suspend-to-ram or suspend-to-disk. Otherwise the machine would freeze. Also note that after waking up from suspend-to-ram and reloading tpm_tis, the trousers daemon refuses to restart. However it restarts with no problem after waking up from suspend-to-disk.
