The debug version of the UEFI shell requires a DXE services table to exist.
Implement the table and let all DXE functions return EFI_UNSUPPORTED.
Signed-off-by: Heinrich Schuchardt <[email protected]>
---
include/efi_dxe.h | 54 ++++++++++++
include/efi_loader.h | 7 ++
lib/efi_loader/Kconfig | 7 ++
lib/efi_loader/Makefile | 1 +
lib/efi_loader/efi_dxe.c | 176 +++++++++++++++++++++++++++++++++++++
lib/efi_loader/efi_setup.c | 6 ++
6 files changed, 251 insertions(+)
create mode 100644 include/efi_dxe.h
create mode 100644 lib/efi_loader/efi_dxe.c
diff --git a/include/efi_dxe.h b/include/efi_dxe.h
new file mode 100644
index 00000000000..5623189de0c
--- /dev/null
+++ b/include/efi_dxe.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * DXE services table
+ *
+ * Copyright (c) 2025 Heinrich Schuchardt
+ */
+
+#ifndef _EFI_DXE_H
+#define _EFI_DXE_H 1
+
+#include <efi.h>
+
+/**
+ * define DXE_SERVICES_SIGNATURE - DXE services signature ('DXE_SERV')
+ */
+#define DXE_SERVICES_SIGNATURE 0x565245535f455844
+/**
+ * define DXE_SERVICES_REVISION - DXE services revision (1.8)
+ */
+#define DXE_SERVICES_REVISION 0x00010050
+
+/**
+ * define EFI_DXE_SERVICES_TABLE_GUID - GUID of the EFI DXE services table
+ */
+#define EFI_DXE_SERVICES_TABLE_GUID \
+ EFI_GUID(0x5ad34ba, 0x6f02, 0x4214, \
+ 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
+
+struct efi_dxe_services {
+ struct efi_table_hdr hdr;
+
+ efi_status_t (EFIAPI *add_memory_space)(void);
+ efi_status_t (EFIAPI *allocate_memory_space)(void);
+ efi_status_t (EFIAPI *free_memory_space)(void);
+ efi_status_t (EFIAPI *remove_memory_space)(void);
+ efi_status_t (EFIAPI *get_memory_space_descriptor)(void);
+ efi_status_t (EFIAPI *set_memory_space_attributes)(void);
+ efi_status_t (EFIAPI *get_memory_space_map)(void);
+ efi_status_t (EFIAPI *add_io_space)(void);
+ efi_status_t (EFIAPI *allocate_io_space)(void);
+ efi_status_t (EFIAPI *free_io_space)(void);
+ efi_status_t (EFIAPI *remove_io_space)(void);
+ efi_status_t (EFIAPI *get_io_space_descriptor)(void);
+ efi_status_t (EFIAPI *get_io_space_map)(void);
+ efi_status_t (EFIAPI *dispatch)(void);
+ efi_status_t (EFIAPI *schedule)(void);
+ efi_status_t (EFIAPI *trust)(void);
+ efi_status_t (EFIAPI *process_firmware_volume)(void);
+ efi_status_t (EFIAPI *set_memory_space_capabilities)(void);
+};
+
+extern efi_guid_t efi_dxe_services_table_guid;
+
+#endif /* _EFI_DXE_H */
diff --git a/include/efi_loader.h b/include/efi_loader.h
index c1258098217..d474866184f 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -663,6 +663,13 @@ efi_status_t efi_smbios_register(void);
*/
efi_status_t efi_hob_list_register(void);
+/**
+ * efi_dxe_services_register() - install DXE services table
+ *
+ * Return: status code
+ */
+efi_status_t efi_dxe_services_register(void);
+
struct efi_simple_file_system_protocol *
efi_fs_from_path(struct efi_device_path *fp);
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index ec38a0ea352..ed3470508ff 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -384,6 +384,13 @@ config EFI_DT_FIXUP
The EFI device-tree fix-up protocol provides a function to let the
firmware apply fix-ups. This may be used by boot loaders.
+config EFI_DXE
+ bool 'DXE services table'
+ default y
+ help
+ Install the DXE services table. The debug version of the UEFI shell
+ requires it.
+
config EFI_LOADER_HII
bool "HII protocols"
default y
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index 195ed8667fe..4f250f21811 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -33,6 +33,7 @@ obj-y += efi_console.o
obj-y += efi_device_path.o
obj-$(CONFIG_EFI_DEVICE_PATH_TO_TEXT) += efi_device_path_to_text.o
obj-$(CONFIG_EFI_DEVICE_PATH_UTIL) += efi_device_path_utilities.o
+obj-$(CONFIG_EFI_DXE) += efi_dxe.o
obj-y += efi_dt_fixup.o
obj-y += efi_fdt.o
obj-y += efi_file.o
diff --git a/lib/efi_loader/efi_dxe.c b/lib/efi_loader/efi_dxe.c
new file mode 100644
index 00000000000..f8920575b0c
--- /dev/null
+++ b/lib/efi_loader/efi_dxe.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DXE services table
+ *
+ * Copyright (c) 2025 Heinrich Schuchardt
+ */
+
+#include <efi_dxe.h>
+#include <efi_loader.h>
+
+efi_guid_t efi_dxe_services_table_guid = EFI_DXE_SERVICES_TABLE_GUID;
+
+static efi_status_t EFIAPI add_memory_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI allocate_memory_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI free_memory_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI remove_memory_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI get_memory_space_descriptor(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI set_memory_space_attributes(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI get_memory_space_map(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI add_io_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI allocate_io_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI free_io_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI remove_io_space(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI get_io_space_descriptor(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI get_io_space_map(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI dispatch(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI schedule(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI trust(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI process_firmware_volume(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI set_memory_space_capabilities(void)
+{
+ EFI_ENTRY();
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static struct efi_dxe_services efi_dxe_services = {
+ .hdr = {
+ .signature = DXE_SERVICES_SIGNATURE,
+ .revision = DXE_SERVICES_REVISION,
+ .headersize = sizeof(struct efi_dxe_services),
+ },
+ .add_memory_space = add_memory_space,
+ .allocate_memory_space = allocate_memory_space,
+ .free_memory_space = free_memory_space,
+ .remove_memory_space = remove_memory_space,
+ .get_memory_space_descriptor = get_memory_space_descriptor,
+ .set_memory_space_attributes = set_memory_space_attributes,
+ .get_memory_space_map = get_memory_space_map,
+ .add_io_space = add_io_space,
+ .allocate_io_space = allocate_io_space,
+ .free_io_space = free_io_space,
+ .remove_io_space = remove_io_space,
+ .get_io_space_descriptor = get_io_space_descriptor,
+ .get_io_space_map = get_io_space_map,
+ .dispatch = dispatch,
+ .schedule = schedule,
+ .trust = trust,
+ .process_firmware_volume = process_firmware_volume,
+ .set_memory_space_capabilities = set_memory_space_capabilities,
