From: Heinrich Schuchardt Date: Fri, 26 Apr 2024 14:13:19 +0000 (+0200) Subject: efi_loader: return binary from efi_dp_from_lo() X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=b34528ebadf0d6401895d459e9968a660a816cfe;p=u-boot.git efi_loader: return binary from efi_dp_from_lo() For finding distro supplied device-trees we need to know from which device we are booting. This can be identified via the device-path of the binary. Up to now efi_dp_from_lo() only could return the initrd or fdt device-path. Allow returning the binary device-path, too. Signed-off-by: Heinrich Schuchardt Reviewed-by: Ilias Apalodimas --- diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index 18be8a1b4f..0f684590f2 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -1133,17 +1133,18 @@ ssize_t efi_dp_check_length(const struct efi_device_path *dp, } /** - * efi_dp_from_lo() - Get the instance of a VenMedia node in a - * multi-instance device path that matches - * a specific GUID. This kind of device paths - * is found in Boot#### options describing an - * initrd location + * efi_dp_from_lo() - get device-path from load option * - * @lo: EFI_LOAD_OPTION containing a valid device path - * @guid: guid to search for + * The load options in U-Boot may contain multiple concatenated device-paths. + * The first device-path indicates the EFI binary to execute. Subsequent + * device-paths start with a VenMedia node where the GUID identifies the + * function (initrd or fdt). + * + * @lo: EFI load option containing a valid device path + * @guid: GUID identifying device-path or NULL for the EFI binary * * Return: - * device path including the VenMedia node or NULL. + * device path excluding the matched VenMedia node or NULL. * Caller must free the returned value. */ struct @@ -1154,6 +1155,9 @@ efi_device_path *efi_dp_from_lo(struct efi_load_option *lo, struct efi_device_path_vendor *vendor; int lo_len = lo->file_path_length; + if (!guid) + return efi_dp_dup(fp); + for (; lo_len >= sizeof(struct efi_device_path); lo_len -= fp->length, fp = (void *)fp + fp->length) { if (lo_len < 0 || efi_dp_check_length(fp, lo_len) < 0)