kumquat-buildroot/board/pc
Erico Nunes 51e35be7cb configs/pc_x86_64_efi_defconfig: enable kernel EFI support
The pc_x86_64_efi reference defconfig is targeted towards an EFI
environment but the kernel which comes with it does not enable EFI
support by default.

Booting this defconfig without kernel EFI support on a qemu virtual
machine with EFI firmware resulted in no output to tty1 or ttyS0.
Enabling EFI support in the kernel fixed this and seems saner for an EFI
reference Buildroot defconfig.

Adding CONFIG_EFI to board/pc/linux-extras.config also affects
pc_x86_64_bios_defconfig which doesn't require it, however it was
observed that the extra overhead is small and so this is preferred
rather than having a separate config file.

This was tested with qemu 2.6.0 running with kvm enabled and firmware
EFI v2.60 by EDK II. Also built and verified bios defconfig on the same
setup but with BIOS firmware instead.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2016-08-22 23:46:45 +02:00
..
genimage-bios.cfg
genimage-efi.cfg
linux-extras.config configs/pc_x86_64_efi_defconfig: enable kernel EFI support 2016-08-22 23:46:45 +02:00
post-image.sh
readme.txt

Bare PC sample config
=====================

1. Build

  First select the appropriate target you want.

  For BIOS-based boot strategy:

  $ make pc_x86_64_bios_defconfig

  Or for EFI:

  $ make pc_x86_64_efi_defconfig

  Add any additional packages required and build:

  $ make

2. Write the pendrive

  The build process will create a pendrive image called sdcard.img in
  output/images.

  Write the image to a pendrive:

  $ dd if=output/images/disk.img of=/dev/sdc; sync

  Once it's done insert it into the target PC and boot.

  Remember that if said PC has another boot device you might need to
  select this alternative for it to boot.

  In the case of EFI boot you might need to disable Secure Boot from
  the setup as well.

3. Enjoy