On Wed, 2018-11-14 at 21:46 +0100, Michael Niewöhner wrote: > Hi all, > > I tried that patch mentioned by Mimi but it does not change anything for me. > > Then I did some more tests with different kernel configs and finally got TPM > working by > a) compiling TPM as modules and rmmod tpm* and re-modprobe tpm_tis. > > (initramfs) dmesg | grep -i tpm > [ 0.000000] efi: ACPI 2.0=0x9ea7e000 ACPI=0x9ea7e000 SMBIOS=0x9f5eb000 > SMBIOS 3.0=0x9f5ea000 ESRT=0x9c07d918 MEMATTR=0x9bea3018 > TPMEventLog=0x97cbb018 > [ 0.003793] ACPI: TPM2 0x000000009EAB7F70 000034 (v03 LENOVO TC- > S06 00001260 AMI 00000000) > (initramfs) rmmod tpm_crb tpm_tis tpm_tis_core tpm > (initramfs) modprobe tpm_tis > [ 44.956905] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2) > > b) compiling TPM-support in-kernel and manually bind the ACPI device > > (initramfs) dmesg | grep -i tpm > [ 0.000000] efi: ACPI 2.0=0x9ea7e000 ACPI=0x9ea7e000 SMBIOS=0x9f5eb000 > SMBIOS > 3.0=0x9f5ea000 ESRT=0x9c07d918 MEMATTR=0x9bea3018 TPMEventLog=0x97cbb018 > [ 0.003546] ACPI: TPM2 0x000000009EAB7F70 000034 (v03 LENOVO TC-S06 > 00001260 > AMI 00000000) > (initramfs) echo MSFT0101:00 >/sys/bus/platform/drivers/tpm_tis/bind > [ 233.076079] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2) > > > It seems to me, the kernel tries to enable the TPM to early... > > > Michael
Looks like the manual driver bind works more or less but e.g reading hwrng does not work... # echo MSFT0101:00 >/sys/bus/platform/drivers/tpm_tis/bind [ 148.293302] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2) # cat /sys/devices/virtual/misc/hw_random/rng_current tpm-rng-0 # cat /dev/hwrng >/dev/null cat: /dev/hwrng: Operation not permitted
