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cmd: eficonfig: add support for setting fdt

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We already support creating a load option where the device-path
field contains the concatenation of the binary device-path and
optionally the device path of the initrd which we expose via the
EFI_LOAD_FILE2_PROTOCOL.

Allow to append another device-path pointing to the device-tree
identified by the device-tree GUID.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heinrich Schuchardt 2024-04-26 16:13:11 +02:00
parent bf03333d09
commit 58bef195f9
3 changed files with 119 additions and 18 deletions
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44
lib/efi_loader/efi_helper.c
View file

@ -99,6 +99,50 @@ err:
return NULL;
}
/**
* efi_load_option_dp_join() - join device-paths for load option
*
* @dp: in: binary device-path, out: joined device-path
* @dp_size: size of joined device-path
* @initrd_dp: initrd device-path or NULL
* @fdt_dp: device-tree device-path or NULL
* Return: status_code
*/
efi_status_t efi_load_option_dp_join(struct efi_device_path **dp,
size_t *dp_size,
struct efi_device_path *initrd_dp,
struct efi_device_path *fdt_dp)
{
if (!dp)
return EFI_INVALID_PARAMETER;
*dp_size = efi_dp_size(*dp);
if (initrd_dp) {
struct efi_device_path *tmp_dp = *dp;
*dp = efi_dp_concat(tmp_dp, initrd_dp, *dp_size);
efi_free_pool(tmp_dp);
if (!*dp)
return EFI_OUT_OF_RESOURCES;
*dp_size += efi_dp_size(initrd_dp) + sizeof(END);
}
if (fdt_dp) {
struct efi_device_path *tmp_dp = *dp;
*dp = efi_dp_concat(tmp_dp, fdt_dp, *dp_size);
efi_free_pool(tmp_dp);
if (!dp)
return EFI_OUT_OF_RESOURCES;
*dp_size += efi_dp_size(fdt_dp) + sizeof(END);
}
*dp_size += sizeof(END);
return EFI_SUCCESS;
}
const struct guid_to_hash_map {
efi_guid_t guid;
const char algo[32];