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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:
-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.
-- Build the kernel with the following configuration.
- If EFI runtime services are expected, the following configuration should
- be selected.
- CONFIG_EFI_VARS=y or m # optional
-- 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.
-- If some or all EFI runtime services don't work, you can try following
- kernel command line parameters to turn off some or all EFI runtime
- services.
- noefi turn off all EFI runtime services
- reboot_type=k turn off EFI reboot runtime service
-- If the EFI memory map has additional entries not in the E820 map,
- you can include those entries in the kernels memory map of available
- physical RAM by using the following kernel command line parameter.
- add_efi_memmap include EFI memory map of available physical RAM