From 58bef195f94eae4ae90bd5409a81a204c0cbbca3 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Fri, 26 Apr 2024 16:13:11 +0200 Subject: cmd: eficonfig: add support for setting fdt 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 Reviewed-by: Ilias Apalodimas --- lib/efi_loader/efi_helper.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) (limited to 'lib/efi_loader/efi_helper.c') diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c index 73d0279e843..348612c3dad 100644 --- a/lib/efi_loader/efi_helper.c +++ b/lib/efi_loader/efi_helper.c @@ -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]; -- cgit v1.2.3