systemd-hibernate-resume-generator — Unit generator for resume= kernel parameter
/usr/lib/systemd/system-generators/systemd-hibernate-resume-generator
systemd-hibernate-resume-generator is a
    generator that initiates the procedure to resume the system from hibernation.
    It instantiates the
    systemd-hibernate-resume@.service(8)
    unit according to the value of resume= parameter
    specified on the kernel command line, which will instruct the kernel
    to resume the system from the hibernation image on that device.
systemd-hibernate-resume-generator
    understands the following kernel command line parameters:
resume=¶Takes a path to the resume device. Both
        persistent block device paths like
        /dev/disk/by-foo/bar and
        fstab(5)-style
        specifiers like "FOO=bar" are
        supported.
resumeflags=¶Takes the resume device mount options to
        use. Defaults rootflags= if not specified.
noresume¶Do not try to resume from hibernation. If this parameter is
        present, resume= is ignored.