On Sun, Nov 18, 2018 at 03:10:06PM +0100, Michael Niewöhner wrote: > On Sun, 2018-11-18 at 10:18 +0200, Jarkko Sakkinen wrote: > > On Fri, Nov 16, 2018 at 10:06:28PM +0100, Michael Niewöhner wrote: > > > 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 > > > > Can you check with trace-cmd start -p function -l 'tpm*'? > > > > /Jarkko > > > Hi Jarko, > > what output do you need exactly? TPM gets added with tpm_add_hwrng() and the callback that is called by hwrng subsystem is tpm_hwrng_read(). Obviously the former gets called (can be seen from the sysfs file). Just wondering if it ever reaches tpm_hwrng_read(). /Jarkko
