From 25dc7d5aedfef310a7e49b37e2556dc84b79cb00 Mon Sep 17 00:00:00 2001 From: Masahisa Kojima Date: Wed, 7 Jun 2023 14:41:54 +0900 Subject: efi_loader: get lowest supported version from device tree This commit gets the lowest supported version from device tree, then fills the lowest supported version in FMP->GetImageInfo(). Signed-off-by: Masahisa Kojima Reviewed-by: Ilias Apalodimas --- lib/efi_loader/efi_firmware.c | 50 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 49 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/efi_loader/efi_firmware.c b/lib/efi_loader/efi_firmware.c index 5b71a2fcc9f..ae631f49f7e 100644 --- a/lib/efi_loader/efi_firmware.c +++ b/lib/efi_loader/efi_firmware.c @@ -144,6 +144,51 @@ efi_status_t EFIAPI efi_firmware_set_package_info_unsupported( return EFI_EXIT(EFI_UNSUPPORTED); } +/** + * efi_firmware_get_lsv_from_dtb - get lowest supported version from dtb + * @image_index: Image index + * @image_type_id: Image type id + * @lsv: Pointer to store the lowest supported version + * + * Read the firmware version information from dtb. + */ +static void efi_firmware_get_lsv_from_dtb(u8 image_index, + efi_guid_t *image_type_id, u32 *lsv) +{ + const void *fdt = gd->fdt_blob; + const fdt32_t *val; + const char *guid_str; + int len, offset, index; + int parent; + + *lsv = 0; + + parent = fdt_subnode_offset(fdt, 0, "firmware-version"); + if (parent < 0) + return; + + fdt_for_each_subnode(offset, fdt, parent) { + efi_guid_t guid; + + guid_str = fdt_getprop(fdt, offset, "image-type-id", &len); + if (!guid_str) + continue; + uuid_str_to_bin(guid_str, guid.b, UUID_STR_FORMAT_GUID); + + val = fdt_getprop(fdt, offset, "image-index", &len); + if (!val) + continue; + index = fdt32_to_cpu(*val); + + if (!guidcmp(&guid, image_type_id) && index == image_index) { + val = fdt_getprop(fdt, offset, + "lowest-supported-version", &len); + if (val) + *lsv = fdt32_to_cpu(*val); + } + } +} + /** * efi_firmware_fill_version_info - fill the version information * @image_info: Image information @@ -171,8 +216,11 @@ void efi_firmware_fill_version_info(struct efi_firmware_image_descriptor *image_ else image_info->version = 0; + efi_firmware_get_lsv_from_dtb(fw_array->image_index, + &fw_array->image_type_id, + &image_info->lowest_supported_image_version); + image_info->version_name = NULL; /* not supported */ - image_info->lowest_supported_image_version = 0; image_info->last_attempt_version = 0; image_info->last_attempt_status = LAST_ATTEMPT_STATUS_SUCCESS; } -- cgit v1.2.3