On 09/12/2017 04:14 AM, Nasim, Kam wrote:
Hi folks,
I am building my TPM 2.0 driver as Kernel modules (tpm.ko,
tpm_tis_core.ko and tpm_tis.ko).
I noticed that while my /sys/kernel/security directory is created and
mounted to securityFS, it is empty.
Looking at tpm_bios_log_setup() in tpm1_event.log, I see that this is
being done during chip registration:
TPM 2.0 binary_bios_measurements event log file support is currently not
available for ACPI based platform. It is only for device tree based
platform. And I think you are using ACPI.
Thanks & Regards,
- Nayna
if (chip->flags & TPM_CHIP_FLAG_TPM2)
chip->bin_log_seqops.seqops =
&tpm2_binary_b_measurements_seqops;
else
chip->bin_log_seqops.seqops =
&tpm_binary_b_measurements_seqops;
chip->bios_dir[cnt] =
securityfs_create_file("binary_bios_measurements",
0440, chip->bios_dir[0],
(void *)&chip->bin_log_seqops,
&tpm_bios_measurements_ops);
if (IS_ERR(chip->bios_dir[cnt]))
goto err;
My TPM modules are loaded properly and I can interact with TPM using
userspace TSS2 applications:
$ sudo lsmod | grep tpm
Password:
tpm_crb 6458 0
tpm_tis 5950 0
tpm_tis_core 10054 1 tpm_tis
tpm 48093 3 tpm_crb,tpm_tis,tpm_tis_core
2017-09-08T19:39:16.239 controller-0 kernel: warning [ 0.000000]
ACPI: TPM2 000000007b7c8000 00034 (v03 INTEL S2600WT 00000002 INTL
01000013)
2017-09-08T19:39:16.252 controller-0 kernel: info [ 5.457568]
tpm_tis MSFT0101:00: 2.0 TPM (device-id 0x1A, rev-id 16)
How and when would this file be created? For that matter I don’t even
have a /sys/devices/pnp0/<pnp#>/pcrs file present
(I am on CentOS 7.3)
Thoughts?
Thanks,
Kam
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