id = 708
title = "some TPM related files are missing in sysfs when enable passthrough TPM"
state = "closed"
created_at = "2021-11-05T07:36:49.648Z"
closed_at = "2022-01-08T04:59:35.437Z"
labels = ["workflow::In Progress"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/708"
host-os = "(ubuntu)"
host-arch = "(x86)"
qemu-version = "(e.g. `qemu-system-x86_64 --version`)"
guest-os = "(yocto linux)"
guest-arch = "(x86)"
description = """When enable passthrough TPM, there are some files in sysfs are missing, like description, uid file.
under the host linux, we have those file in it:
root@intel-x86-64:/sys/class/tpm/tpm0/device/firmware_node# cat description 
TPM 2.0 Device
root@intel-x86-64:/sys/class/tpm/tpm0/device/firmware_node# cat uid 
1"""
reproduce = """after boot into system, check sysfs, there is no description and uid file in /sys/class/tpm/tpm0/device/firmware_node"""
additional = "n/a"