mirror of
https://github.com/systemd/systemd
synced 2024-09-06 16:56:43 +00:00
![Lennart Poettering](/assets/img/avatar_default.png)
Distributions apparently only compile a subset of TPM2 drivers into the kernel. For those not compiled it but provided as kmod we need a synchronization point: we must wait before the first TPM2 interaction until the driver is available and accessible. This adds a tpm2.target unit as such a synchronization point. It's ordered after /dev/tpmrm0, and is pulled in by a generator whenever we detect that the kernel reported a TPM2 to exist but we have no device for it yet. This should solve the issue, but might create problems: if there are TPM devices supported by firmware that we don't have Linux drivers for we'll hang for a bit. Hence let's add a kernel cmdline switch to disable (or alternatively force) this logic. Fixes: #30164
24 lines
727 B
SYSTEMD
24 lines
727 B
SYSTEMD
# SPDX-License-Identifier: LGPL-2.1-or-later
|
|
#
|
|
# This file is part of systemd.
|
|
#
|
|
# systemd is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU Lesser General Public License as published by
|
|
# the Free Software Foundation; either version 2.1 of the License, or
|
|
# (at your option) any later version.
|
|
|
|
[Unit]
|
|
Description=TPM2 PCR Machine ID Measurement
|
|
Documentation=man:systemd-pcrmachine.service(8)
|
|
DefaultDependencies=no
|
|
Conflicts=shutdown.target
|
|
After=tpm2.target
|
|
Before=sysinit.target shutdown.target
|
|
ConditionPathExists=!/etc/initrd-release
|
|
ConditionSecurity=measured-uki
|
|
|
|
[Service]
|
|
Type=oneshot
|
|
RemainAfterExit=yes
|
|
ExecStart={{LIBEXECDIR}}/systemd-pcrextend --graceful --machine-id
|