[U-Boot] [PATCH v4 14/16] efi: sandbox: Add a simple 'bootefi test' command

[Simon Glass <sjg@chromium.org>]

This jumps to test code which can call directly into the EFI support. It
does not need a separate image so it is easy to write tests with it.

This test can be executed without causing problems to the run-time
environemnt (e.g. U-Boot does not need to reboot afterwards).

For now the test just outputs a message. To try it:

./sandbox/u-boot -c "bootefi test"
U-Boot 2017.09-00204-g696c9855fe (Sep 17 2017 - 16:43:53 -0600)

DRAM:  128 MiB
MMC:
Using default environment

In:    serial
Out:   serial
Err:   serial
SCSI:  Net:   No ethernet found.
IDE:   Bus 0: not available
Found 0 disks
Hello, world!
Test passed

Signed-off-by: Simon Glass <sjg@chromium.org>
---

Changes in v4:
- Rebase to master
- Update SPDX tags

Changes in v3:
- Rebase to master

Changes in v2:
- Rebase to master

 cmd/bootefi.c             | 26 ++++++++++++++++++++------
 include/efi_loader.h      |  3 +++
 lib/efi_loader/Kconfig    | 10 ++++++++++
 lib/efi_loader/Makefile   |  1 +
 lib/efi_loader/efi_test.c | 16 ++++++++++++++++
 5 files changed, 50 insertions(+), 6 deletions(-)
 create mode 100644 lib/efi_loader/efi_test.c

diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index 9bcdf8bdc48..46bd80d2077 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -335,7 +335,6 @@ exit:
 	return ret;
 }
 
-#ifdef CONFIG_CMD_BOOTEFI_SELFTEST
 /**
  * bootefi_test_prepare() - prepare to run an EFI test
  *
@@ -391,7 +390,6 @@ static void bootefi_test_finish(struct efi_loaded_image *image,
 	free(image->load_options);
 	list_del(&obj->link);
 }
-#endif /* CONFIG_CMD_BOOTEFI_SELFTEST */
 
 static int do_bootefi_bootmgr_exec(void)
 {
@@ -423,8 +421,10 @@ static int do_bootefi_bootmgr_exec(void)
 /* Interpreter command to boot an arbitrary EFI image from memory */
 static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
-	unsigned long addr;
+	struct efi_loaded_image image;
+	struct efi_object obj;
 	char *saddr;
+	unsigned long addr;
 	efi_status_t r;
 	void *fdt_addr;
 
@@ -466,11 +466,25 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		memcpy((char *)addr, __efi_helloworld_begin, size);
 	} else
 #endif
+	if (IS_ENABLED(CONFIG_BOOTEFI_TEST) && !strcmp(argv[1], "test")) {
+		int ret;
+
+		if (bootefi_test_prepare(&image, &obj, "\\test",
+					 (ulong)&efi_test))
+			return CMD_RET_FAILURE;
+
+		ret = efi_test(&image, &systab);
+		bootefi_test_finish(&image, &obj);
+		if (ret) {
+			printf("Test failed: err=%d\n", ret);
+			return CMD_RET_FAILURE;
+		}
+		printf("Test passed\n");
+
+		return 0;
+	}
 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
 	if (!strcmp(argv[1], "selftest")) {
-		struct efi_loaded_image image;
-		struct efi_object obj;
-
 		if (bootefi_test_prepare(&image, &obj, "\\test",
 					 (uintptr_t)&efi_selftest))
 			return CMD_RET_FAILURE;
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 2519a7c33a7..a19f1eaef24 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -435,6 +435,9 @@ efi_status_t EFIAPI efi_set_variable(s16 *variable_name,
 void *efi_bootmgr_load(struct efi_device_path **device_path,
 		       struct efi_device_path **file_path);
 
+/* Perform EFI tests */
+int efi_test(efi_handle_t image_handle, struct efi_system_table *systab);
+
 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
 
 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 96107a90a90..59bdd389f4f 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -24,3 +24,13 @@ config EFI_LOADER_BOUNCE_BUFFER
 	  Some hardware does not support DMA to full 64bit addresses. For this
 	  hardware we can create a bounce buffer so that payloads don't have to
 	  worry about platform details.
+
+config BOOTEFI_TEST
+	bool "Provide a test for the EFI loader"
+	depends on EFI_LOADER && SANDBOX
+	default y
+	help
+	  Provides a test of the EFI loader functionality accessed via the
+	  command line ('bootefi test'). This runs within U-Boot so does not
+	  need a separate EFI application to work. It aims to include coverage
+	  of all EFI code which can be accessed within sandbox.
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index c6046e36d26..2da28f9c90c 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -23,3 +23,4 @@ obj-$(CONFIG_DM_VIDEO) += efi_gop.o
 obj-$(CONFIG_PARTITIONS) += efi_disk.o
 obj-$(CONFIG_NET) += efi_net.o
 obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += efi_smbios.o
+obj-$(CONFIG_BOOTEFI_TEST) += efi_test.o
diff --git a/lib/efi_loader/efi_test.c b/lib/efi_loader/efi_test.c
new file mode 100644
index 00000000000..4b8d49f324b
--- /dev/null
+++ b/lib/efi_loader/efi_test.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2017, Google Inc.
+ */
+
+#include <common.h>
+#include <efi_api.h>
+
+int efi_test(efi_handle_t image_handle, struct efi_system_table *systable)
+{
+	struct efi_simple_text_output_protocol *con_out = systable->con_out;
+
+	con_out->output_string(con_out, L"Hello, world!\n");
+
+	return 0;
+}
-- 
2.17.0.441.gb46fe60e1d-goog