TPM2 PCR测量#

Various systemd components issue TPM2 PCR measurements during the boot process, both in UEFI mode and from userspace. The following lists all measurements done, and describes (in case done before ExitBootServices()) how they appear in the TPM2 Event Log, maintained by the PC firmware. Note that the userspace measurements listed below are (by default) only done if a system is booted with systemd-stub — or in other words: systemd’s userspace measurements are linked to systemd’s UEFI-mode measurements, and if the latter are not done the former aren’t made either.