On 10.06.24 17:54, Simon Glass wrote:
Hi Heinrich,
On Mon, 10 Jun 2024 at 08:00, Heinrich Schuchardt
<[email protected]> wrote:
On 10.06.24 15:53, Simon Glass wrote:
Hi Heinrich,
On Mon, 10 Jun 2024 at 03:11, Heinrich Schuchardt
<[email protected]> wrote:
In U-Boot EFI boot options can already specify both an EFI binary and
an initrd. With this series we can additionally define the matching
device-tree to be loaded in the boot option.
With the last patch the boot manager will fall back the device-tree
specified by $fdtfile in directories '/dtb/', '/', or '/dtb/current/'
on the boot device if no device-tree is specified in the boot
option or via a bootefi command parameter.
v3:
Add missing '@' in EFI_LP_DP_PART_FDT description.
Use calloc() instead of malloc() in load_fdt_from_load_option().
Add missing '@' in load_fdt_from_load_option function description
Rename struct efi_initrd_dp to efi_lo_dp_prefix.
v2:
Update efi_dp_concat() instead of new function efi_dp_merge().
Carve out a function efi_load_option_dp_join() which we can
use both for the eficonfig and the efidebug command.
Rename variables id_dp, final_dp_size.
Rename create_initrd_dp() to create_lo_dp_part().
Use enum as parameter for create_lo_dp_part().
Put all related changes into one patch.
Heinrich Schuchardt (8):
efi_loader: allow concatenation with contained end node
cmd: eficonfig: add support for setting fdt
cmd: efidebug: add support for setting fdt
efi_loader: load device-tree specified in boot option
efi_loader: move distro_efi_get_fdt_name()
efi_loader: return binary from efi_dp_from_lo()
efi_loader: export efi_load_image_from_path
efi_loader: load distro dtb in bootmgr
boot/bootmeth_efi.c | 60 +---------
cmd/eficonfig.c | 83 +++++++++----
cmd/efidebug.c | 130 +++++++++++++++------
include/efi_loader.h | 24 +++-
lib/efi_loader/Makefile | 1 +
lib/efi_loader/efi_bootbin.c | 2 +-
lib/efi_loader/efi_bootmgr.c | 75 +++++++++++-
lib/efi_loader/efi_boottime.c | 3 +-
lib/efi_loader/efi_device_path.c | 40 ++++---
lib/efi_loader/efi_device_path_utilities.c | 2 +-
lib/efi_loader/efi_fdt.c | 117 +++++++++++++++++++
lib/efi_loader/efi_helper.c | 44 +++++++
12 files changed, 445 insertions(+), 136 deletions(-)
create mode 100644 lib/efi_loader/efi_fdt.c
Somewhat related, what work has been done to support FIT, or to locate
a DT using the compatible string?
CONFIG_BOOTM_EFI allows booting a FIT image containing an EFI binary and
optionally a device-tree. You can manually select a configuration when
invoking the bootm command. I am not aware of any automation for this
selection.
Thanks for the info.
Can we perhaps require FIT_BEST_MATCH and then provide a way? All this
filename stuff is missing the point, really. It isn't going to get any
easier, either.
Thanks for the pointer. FIT_BEST_MATCH would allow to select a matching
device-tree from a FIT image. But any solution using FIT images will not
not be compatible to other firmware.
As a distro I would prefer a solution that runs on any EFI firmware,
e.g. EDK II. Being able to use the same image on all boards of the same
architecture was the motivator for Suse to start U-Boot's EFI
implementation.
Best regards
Heinrich
