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+================
+Block Device EFI
+================
+
+This provides a block-device configuration for the ``vm`` element to
+get a single-partition disk suitable for EFI booting.
+
+Based on upstream DIB element block-device-efi, the only modification
+being the root fs type from hardcoded 'ext4' to relying on FS_TYPE.
+
+Note on x86 this provides the extra `BIOS boot partition
+<https://en.wikipedia.org/wiki/BIOS_boot_partition>`__ and a EFI boot
+partition for maximum compatability.
+