This patch series adds a new interface /sys/firmware/memmap to export the BIOS (Firmware) provided memory map via sysfs for usage with kexec. While the first patch adds the generic interface, the second patch implements that interface for E820 on x86. EFI is on the TODO list, and other architectures can be added later. Signed-off-by: Bernhard Walle <bwalle at suse.de>