diff options
| -rw-r--r-- | Documentation/x86/x86_64/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/x86/x86_64/uefi.rst (renamed from Documentation/x86/x86_64/uefi.txt) | 30 |
2 files changed, 24 insertions, 7 deletions
diff --git a/Documentation/x86/x86_64/index.rst b/Documentation/x86/x86_64/index.rst index a8cf7713cac9..ddfa1f9d4193 100644 --- a/Documentation/x86/x86_64/index.rst +++ b/Documentation/x86/x86_64/index.rst @@ -8,3 +8,4 @@ x86_64 Support :maxdepth: 2 boot-options + uefi diff --git a/Documentation/x86/x86_64/uefi.txt b/Documentation/x86/x86_64/uefi.rst index a5e2b4fdb170..88c3ba32546f 100644 --- a/Documentation/x86/x86_64/uefi.txt +++ b/Documentation/x86/x86_64/uefi.rst @@ -1,5 +1,8 @@ +.. SPDX-License-Identifier: GPL-2.0 + +===================================== General note on [U]EFI x86_64 support -------------------------------------- +===================================== The nomenclature EFI and UEFI are used interchangeably in this document. @@ -14,29 +17,42 @@ with EFI firmware and specifications are listed below. 3. x86_64 platform with EFI/UEFI firmware. -Mechanics: +Mechanics --------- -- Build the kernel with the following configuration. + +- Build the kernel with the following configuration:: + CONFIG_FB_EFI=y CONFIG_FRAMEBUFFER_CONSOLE=y + If EFI runtime services are expected, the following configuration should - be selected. + be selected:: + CONFIG_EFI=y 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 + + 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 + + add_efi_memmap + include EFI memory map of available physical RAM |