Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.
1 General note on [U]EFI x86_64 support 2 ------------------------------------- 3 4 The nomenclature EFI and UEFI are used interchangeably in this document. 5 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. 9 10 1. UEFI specification: http://www.uefi.org 11 12 2. Booting Linux kernel on UEFI x86_64 platform requires bootloader 13 support. Elilo with x86_64 support can be used. 14 15 3. x86_64 platform with EFI/UEFI firmware. 16 17 Mechanics: 18 --------- 19 - Build the kernel with the following configuration. 20 CONFIG_FB_EFI=y 21 CONFIG_FRAMEBUFFER_CONSOLE=y 22 If EFI runtime services are expected, the following configuration should 23 be selected. 24 CONFIG_EFI=y 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 33 in first step. 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 36 services. 37 noefi turn off all EFI runtime services 38 reboot_type=k turn off EFI reboot runtime service 39 - If the EFI memory map has additional entries not in the E820 map, 40 you can include those entries in the kernels memory map of available 41 physical RAM by using the following kernel command line parameter. 42 add_efi_memmap include EFI memory map of available physical RAM