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phil_r
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Joined: 14 Mar 2006
Posts: 265
Location: Omaha, NE, USA
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 Posted: Fri Dec 17, 2021 3:20 am Post subject: TPM2 enabled in mobo firmware, no devices when booted |
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Hi everyone. I'm trying to get TPM working (for Win 11 on VMware Player) but having a few issues. I have the device enabled in the UEFI, I have modules compiled and loaded:
| Code: | undertaker /sys/class/tpm # lsmod | grep tpm
tpm_tis 16384 0
tpm_tis_core 20480 1 tpm_tis
tpm 69632 2 tpm_tis,tpm_tis_core
undertaker /sys/class/tpm # dmesg | grep -i tpm
[ 0.000000] efi: ACPI=0xca437000 ACPI 2.0=0xca437014 TPMFinalLog=0xca747000 SMBIOS=0xcb7fb000 SMBIOS 3.0=0xcb7fa000 MEMATTR=0xc5647418 ESRT=0xc859cb98 RNG=0xcb841698 TPMEventLog=0xc0aa9018
[ 0.004493] ACPI: TPM2 0x00000000CA32E000 00004C (v04 ALASKA A M I 00000001 AMI 00000000)
[ 0.004526] ACPI: Reserving TPM2 table memory at [mem 0xca32e000-0xca32e04b]
undertaker /sys/class/tpm # ls -l
total 0
undertaker /sys/class/tpm # ls /dev/tpm*
ls: cannot access '/dev/tpm*': No such file or directory |
Am I missing something fundamental here? Maybe buggy firmware (although it's a very new board and recent version of firmware)? (Edit - I don't think it's buggy firmware, I've set up dualboot with Win 11 and that sees a TPM 2.0 device and is quite happy to install and boot.)
Any/all pointers appreciated!
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phil_r
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Joined: 14 Mar 2006
Posts: 265
Location: Omaha, NE, USA
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| Posted: Fri Dec 17, 2021 3:30 pm Post subject: |
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Well an update... after working on a wifi-card issue - which involved powering off and pulling the power cord out (don't ask) - when I booted back up I see /dev/tpm0, /dev/tpm and /dev/tpmrm0 now so something happened. Running tpm_version still fails with communication failure though...
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finalturismo
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Joined: 06 Jan 2020
Posts: 410
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| Posted: Sun Dec 19, 2021 3:08 am Post subject: |
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| phil_r wrote: | | Well an update... after working on a wifi-card issue - which involved powering off and pulling the power cord out (don't ask) - when I booted back up I see /dev/tpm0, /dev/tpm and /dev/tpmrm0 now so something happened. Running tpm_version still fails with communication failure though... |
Did you check your kernel options? |
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phil_r
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Joined: 14 Mar 2006
Posts: 265
Location: Omaha, NE, USA
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| Posted: Sun Dec 19, 2021 3:09 am Post subject: |
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| finalturismo wrote: | | phil_r wrote: | | Well an update... after working on a wifi-card issue - which involved powering off and pulling the power cord out (don't ask) - when I booted back up I see /dev/tpm0, /dev/tpm and /dev/tpmrm0 now so something happened. Running tpm_version still fails with communication failure though... |
Did you check your kernel options? |
Yes, I mentioned that at the start of the first post.
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salahx
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Joined: 12 Mar 2005
Posts: 559
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| Posted: Sun Dec 19, 2021 4:36 am Post subject: |
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tpm_version is the wrong utility. tpm-tools is for TPM 1.2 You need tpm2-tools (and I highly recommend tpm2-abrmd as well). Once installed. try:
| Code: |
tpm2_pcrread sha256
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And it should pretty print all 24 sha256 PCR's
Last edited by salahx on Sun Dec 19, 2021 8:52 pm; edited 1 time in total |
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finalturismo
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Joined: 06 Jan 2020
Posts: 410
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| Posted: Sun Dec 19, 2021 8:28 pm Post subject: |
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| phil_r wrote: | | finalturismo wrote: | | phil_r wrote: | | Well an update... after working on a wifi-card issue - which involved powering off and pulling the power cord out (don't ask) - when I booted back up I see /dev/tpm0, /dev/tpm and /dev/tpmrm0 now so something happened. Running tpm_version still fails with communication failure though... |
Did you check your kernel options? |
Yes, I mentioned that at the start of the first post. |
oops lol |
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phil_r
Apprentice
Joined: 14 Mar 2006
Posts: 265
Location: Omaha, NE, USA
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| Posted: Mon Dec 20, 2021 3:30 pm Post subject: |
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| salahx wrote: | tpm_version is the wrong utility. tpm-tools is for TPM 1.2 You need tpm2-tools (and I highly recommend tpm2-abrmd as well). Once installed. try:
| Code: |
tpm2_pcrread sha256
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And it should pretty print all 24 sha256 PCR's |
tpm2-tools had been installed at some point, possibly something else pulled it in - I don't remember emerging that specfically.
The tpm2_pccread sha256 command did work, I got 24 PCRs listsed. It does seem to be working now as the /dev/tpm* devices are there and I can run a Windows 11 VM in VMware Workstation and that sees a TPM. I just don't know why a) the devices weren't there before and b) what changed to now make them show up. I hate problems that fix themselves...
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