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Subject[PATCH 0/6] tpm_tis: various cleanups, and support for Intel iTPM
Date
Several patches to improve drivers/char/tpm/tpm_tis.c:

- autoload tpm_tis.ko based on acpi / pnp
- fix driver/hardware bugs observed on iTPM
- improve module probing printks
- add workaround code for iTPM

With these patches, the T500's iTPM probes ok and has reasonable
contents in /sys/kernel/security/tpm0/ascii_bios_measurements:

% dmesg|grep tpm
[ 8.599680] tpm_tis INTC0102:00: found 0xfed40000(0x5000)
[ 8.599769] tpm_tis INTC0102:00: no IRQ found in _CRS, polling mode
[ 8.608607] tpm_tis INTC0102:00: 1.2 TPM (8086:1020 rev 6)
[ 8.608665] tpm_tis INTC0102:00: Intel iTPM workaround enabled
% sudo head -3 /sys/kernel/security/tpm0/ascii_bios_measurements
0 d6184a2d2e3a8bfae13a1ebb37d62e222bfab57d 08 [S-CRTM Version]
1 0f18524a0ed83806de3bab13c05e2dcc7a8e9c09 09 [CPU Microcode]
0 d9f7d65755c884f6c25680d577f348523006eed3 01 [POST CODE]

Also, I've tested that the driver still works on Dell E4300.

I'm not sure that switching to ACPI probing is either necessary or a
good idea, but I wasn't able to get the pnp_driver system to load the
driver on the Lenovo.

drivers/char/tpm/Kconfig | 2 +-
drivers/char/tpm/tpm_tis.c | 202 +++++++++++++++++------
2 files changed, 150 insertions(+), 54 deletions(-)

-andy


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