The boot-constraint subsystem

The fifth version of the patch series adding the boot-constraint subsystem is under review on the linux-kernel mailing list. The purpose of this subsystem is to honor the constraints put on devices by the bootloader before those devices are handed over to the operating system (OS) — Linux in our case. If these constraints are violated, devices may fail to work properly once the kernel starts reconfiguring the hardware; by tracking and enforcing those constraints, instead, we can ensure that hardware continues to work properly until the kernel is fully operational.

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