efi: libstub: Add mixed mode support to command line initrd loader

Now that we have support for calling protocols that need additional
marshalling for mixed mode, wire up the initrd command line loader.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

1 files changed, 54 insertions, 27 deletions

diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 8bb11fb309c3..5615ad6f2958 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -595,36 +595,63 @@ typedef struct {
 	efi_char16_t		filename[];
 } efi_file_info_t;
 
-typedef struct efi_file_protocol efi_file_protocol_t;
-
-struct efi_file_protocol {
-	u64		revision;
-	efi_status_t	(__efiapi *open)	(efi_file_protocol_t *,
-						 efi_file_protocol_t **,
-						 efi_char16_t *, u64, u64);
-	efi_status_t	(__efiapi *close)	(efi_file_protocol_t *);
-	efi_status_t	(__efiapi *delete)	(efi_file_protocol_t *);
-	efi_status_t	(__efiapi *read)	(efi_file_protocol_t *,
-						 unsigned long *, void *);
-	efi_status_t	(__efiapi *write)	(efi_file_protocol_t *,
-						 unsigned long, void *);
-	efi_status_t	(__efiapi *get_position)(efi_file_protocol_t *, u64 *);
-	efi_status_t	(__efiapi *set_position)(efi_file_protocol_t *, u64);
-	efi_status_t	(__efiapi *get_info)	(efi_file_protocol_t *,
-						 efi_guid_t *, unsigned long *,
-						 void *);
-	efi_status_t	(__efiapi *set_info)	(efi_file_protocol_t *,
-						 efi_guid_t *, unsigned long,
-						 void *);
-	efi_status_t	(__efiapi *flush)	(efi_file_protocol_t *);
+typedef union efi_file_protocol efi_file_protocol_t;
+
+union efi_file_protocol {
+	struct {
+		u64		revision;
+		efi_status_t	(__efiapi *open)	(efi_file_protocol_t *,
+							 efi_file_protocol_t **,
+							 efi_char16_t *, u64,
+							 u64);
+		efi_status_t	(__efiapi *close)	(efi_file_protocol_t *);
+		efi_status_t	(__efiapi *delete)	(efi_file_protocol_t *);
+		efi_status_t	(__efiapi *read)	(efi_file_protocol_t *,
+							 unsigned long *,
+							 void *);
+		efi_status_t	(__efiapi *write)	(efi_file_protocol_t *,
+							 unsigned long, void *);
+		efi_status_t	(__efiapi *get_position)(efi_file_protocol_t *,
+							 u64 *);
+		efi_status_t	(__efiapi *set_position)(efi_file_protocol_t *,
+							 u64);
+		efi_status_t	(__efiapi *get_info)	(efi_file_protocol_t *,
+							 efi_guid_t *,
+							 unsigned long *,
+							 void *);
+		efi_status_t	(__efiapi *set_info)	(efi_file_protocol_t *,
+							 efi_guid_t *,
+							 unsigned long,
+							 void *);
+		efi_status_t	(__efiapi *flush)	(efi_file_protocol_t *);
+	};
+	struct {
+		u64 revision;
+		u32 open;
+		u32 close;
+		u32 delete;
+		u32 read;
+		u32 write;
+		u32 get_position;
+		u32 set_position;
+		u32 get_info;
+		u32 set_info;
+		u32 flush;
+	} mixed_mode;
 };
 
-typedef struct efi_simple_file_system_protocol efi_simple_file_system_protocol_t;
+typedef union efi_simple_file_system_protocol efi_simple_file_system_protocol_t;
 
-struct efi_simple_file_system_protocol {
-	u64	revision;
-	int	(__efiapi *open_volume)(efi_simple_file_system_protocol_t *,
-					efi_file_protocol_t **);
+union efi_simple_file_system_protocol {
+	struct {
+		u64		revision;
+		efi_status_t	(__efiapi *open_volume)(efi_simple_file_system_protocol_t *,
+							efi_file_protocol_t **);
+	};
+	struct {
+		u64 revision;
+		u32 open_volume;
+	} mixed_mode;
 };
 
 #define EFI_FILE_MODE_READ	0x0000000000000001