arm64: acpi: Honour firmware_signature field of FACS, if it exists

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If the firmware_signature changes then OSPM should not attempt to resume
from hibernate, but should instead perform a clean reboot. Set the global
swsusp_hardware_signature to allow the generic code to include the value
in the swsusp header on disk, and perform the appropriate check on resume.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20240412073530.2222496-3-dwmw2@infradead.org
Signed-off-by: Will Deacon <will@kernel.org>

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David Woodhouse 2024-03-11 13:04:07 +00:00 • committed by Will Deacon

parent bc5b492ac3

commit fbaad243b5

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arch/arm64/kernel/acpi.c

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