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Commit 164e217c authored by Huang, Ying's avatar Huang, Ying Committed by Linus Torvalds
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x86_64 EFI boot support: EFI boot document 



This patch adds document for EFI x86_64 boot support.  The setup and operation
guide of EFI based system is documented in Documentation/x86_64/uefi.txt.

Signed-off-by: default avatarChandramouli Narayanan <mouli@linux.intel.com>
Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7c83172b

Documentation/x86_64/uefi.txt

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General note on [U]EFI x86_64 support

-------------------------------------



The nomenclature EFI and UEFI are used interchangeably in this document.



Although the tools below are _not_ needed for building the kernel,

the needed bootloader support and associated tools for x86_64 platforms

with EFI firmware and specifications are listed below.



1. UEFI specification:  http://www.uefi.org



2. Booting Linux kernel on UEFI x86_64 platform requires bootloader

   support. Elilo with x86_64 support can be used.



3. x86_64 platform with EFI/UEFI firmware.



Mechanics:

---------

- Build the kernel with the following configuration.

	CONFIG_FB_EFI=y

	CONFIG_FRAMEBUFFER_CONSOLE=y

- Create a VFAT partition on the disk

- Copy the following to the VFAT partition:

	elilo bootloader with x86_64 support, elilo configuration file,

	kernel image built in first step and corresponding

	initrd. Instructions on building elilo	and its dependencies

	can be found in the elilo sourceforge project.

- Boot to EFI shell and invoke elilo choosing the kernel image built

  in first step.