projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 164e217c YH |
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 | |
| 9ad65e47 YH |
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 | |
| 164e217c YH |
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. | |
| 9ad65e47 YH |
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 |