Allow an entry to suppress initrd= options #32735
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Currently a kernel initrd can come from the following places: - The LOAD_FILE2 protocol where the initrd is measured into PCR 9 - The initrd= where the initrd is not measured - The linux boot protocols which systemd-boot doesn't use - A builtin initrd which is measured as part of the kernel - An initrdless setup where the behaivour comes from both the kernel and cmdline, both of which are measured Out of these, the initrd= method is the only one which isn't measured. By suppressing the initrd= option, we can get a fully measured boot. This only suppresses the automatic addition of the initrd= option by systemd-boot, however this allows for verification that the initrd was not loaded through initrd= which is not currently possible.
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Currently a kernel initrd can come from the following places:
Out of these, the initrd= method is the only one which isn't measured. By suppressing the initrd= option, we can get a fully measured boot.
This only suppresses the automatic addition of the initrd= option by systemd-boot, however this allows for verification that the initrd was not loaded through initrd= which is not currently possible.
I am not sure that
initrd-arg: yes/initrd-arg: nois the best syntax and would be open to suggestions.