1 General note on [U]EFI x86_64 support
2 -------------------------------------
4 The nomenclature EFI and UEFI are used interchangeably in this document.
6 Although the tools below are _not_ needed for building the kernel,
7 the needed bootloader support and associated tools for x86_64 platforms
8 with EFI firmware and specifications are listed below.
10 1. UEFI specification: http://www.uefi.org
12 2. Booting Linux kernel on UEFI x86_64 platform requires bootloader
13 support. Elilo with x86_64 support can be used.
15 3. x86_64 platform with EFI/UEFI firmware.
19 - Build the kernel with the following configuration.
21 CONFIG_FRAMEBUFFER_CONSOLE=y
22 If EFI runtime services are expected, the following configuration should
25 CONFIG_EFI_VARS=y or m # optional
26 - Create a VFAT partition on the disk
27 - Copy the following to the VFAT partition:
28 elilo bootloader with x86_64 support, elilo configuration file,
29 kernel image built in first step and corresponding
30 initrd. Instructions on building elilo and its dependencies
31 can be found in the elilo sourceforge project.
32 - Boot to EFI shell and invoke elilo choosing the kernel image built
34 - If some or all EFI runtime services don't work, you can try following
35 kernel command line parameters to turn off some or all EFI runtime
37 noefi turn off all EFI runtime services
38 reboot_type=k turn off EFI reboot runtime service