efi_selftest: provide an EFI selftest application

A testing framework for the EFI API is provided.
It can be executed with the 'bootefi selftest' command.

It is coded in a way that at a later stage we may turn it
into a standalone EFI application. The current build system
does not allow this yet.

All tests use a driver model and are run in three phases:
setup, execute, teardown.

A test may be setup and executed at boottime,
it may be setup at boottime and executed at runtime,
or it may be setup and executed at runtime.

After executing all tests the system is reset.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 219 insertions, 0 deletions

diff --git a/lib/efi_selftest/efi_selftest.c b/lib/efi_selftest/efi_selftest.c
new file mode 100644
index 0000000000..efec832e98
--- /dev/null
+++ b/lib/efi_selftest/efi_selftest.c
@@ -0,0 +1,219 @@
+/*
+ * EFI efi_selftest
+ *
+ * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <efi_selftest.h>
+#include <vsprintf.h>
+
+static const struct efi_system_table *systable;
+static const struct efi_boot_services *boottime;
+static const struct efi_runtime_services *runtime;
+static efi_handle_t handle;
+static u16 reset_message[] = L"Selftest completed";
+
+/*
+ * Exit the boot services.
+ *
+ * The size of the memory map is determined.
+ * Pool memory is allocated to copy the memory map.
+ * The memory amp is copied and the map key is obtained.
+ * The map key is used to exit the boot services.
+ */
+void efi_st_exit_boot_services(void)
+{
+	unsigned long  map_size = 0;
+	unsigned long  map_key;
+	unsigned long desc_size;
+	u32 desc_version;
+	efi_status_t ret;
+	struct efi_mem_desc *memory_map;
+
+	ret = boottime->get_memory_map(&map_size, NULL, &map_key, &desc_size,
+				       &desc_version);
+	if (ret != EFI_BUFFER_TOO_SMALL) {
+		efi_st_printf("ERROR: GetMemoryMap did not return "
+			      "EFI_BUFFER_TOO_SMALL\n");
+		return;
+	}
+	/* Allocate extra space for newly allocated memory */
+	map_size += sizeof(struct efi_mem_desc);
+	ret = boottime->allocate_pool(EFI_BOOT_SERVICES_DATA, map_size,
+				      (void **)&memory_map);
+	if (ret != EFI_SUCCESS) {
+		efi_st_printf("ERROR: AllocatePool did not return "
+			      "EFI_SUCCESS\n");
+		return;
+	}
+	ret = boottime->get_memory_map(&map_size, memory_map, &map_key,
+				       &desc_size, &desc_version);
+	if (ret != EFI_SUCCESS) {
+		efi_st_printf("ERROR: GetMemoryMap did not return "
+			      "EFI_SUCCESS\n");
+		return;
+	}
+	ret = boottime->exit_boot_services(handle, map_key);
+	if (ret != EFI_SUCCESS) {
+		efi_st_printf("ERROR: ExitBootServices did not return "
+			      "EFI_SUCCESS\n");
+		return;
+	}
+	efi_st_printf("\nBoot services terminated\n");
+}
+
+/*
+ * Set up a test.
+ *
+ * @test	the test to be executed
+ * @failures	counter that will be incremented if a failure occurs
+ */
+static int setup(struct efi_unit_test *test, unsigned int *failures)
+{
+	int ret;
+
+	if (!test->setup)
+		return 0;
+	efi_st_printf("\nSetting up '%s'\n", test->name);
+	ret = test->setup(handle, systable);
+	if (ret) {
+		efi_st_printf("ERROR: Setting up '%s' failed\n", test->name);
+		++*failures;
+	} else {
+		efi_st_printf("Setting up '%s' succeeded\n", test->name);
+	}
+	return ret;
+}
+
+/*
+ * Execute a test.
+ *
+ * @test	the test to be executed
+ * @failures	counter that will be incremented if a failure occurs
+ */
+static int execute(struct efi_unit_test *test, unsigned int *failures)
+{
+	int ret;
+
+	if (!test->execute)
+		return 0;
+	efi_st_printf("\nExecuting '%s'\n", test->name);
+	ret = test->execute();
+	if (ret) {
+		efi_st_printf("ERROR: Executing '%s' failed\n", test->name);
+		++*failures;
+	} else {
+		efi_st_printf("Executing '%s' succeeded\n", test->name);
+	}
+	return ret;
+}
+
+/*
+ * Tear down a test.
+ *
+ * @test	the test to be torn down
+ * @failures	counter that will be incremented if a failure occurs
+ */
+static int teardown(struct efi_unit_test *test, unsigned int *failures)
+{
+	int ret;
+
+	if (!test->teardown)
+		return 0;
+	efi_st_printf("\nTearing down '%s'\n", test->name);
+	ret = test->teardown();
+	if (ret) {
+		efi_st_printf("ERROR: Tearing down '%s' failed\n", test->name);
+		++*failures;
+	} else {
+		efi_st_printf("Tearing down '%s' succeeded\n", test->name);
+	}
+	return ret;
+}
+
+/*
+ * Execute selftest of the EFI API
+ *
+ * This is the main entry point of the EFI selftest application.
+ *
+ * All tests use a driver model and are run in three phases:
+ * setup, execute, teardown.
+ *
+ * A test may be setup and executed at boottime,
+ * it may be setup at boottime and executed at runtime,
+ * or it may be setup and executed at runtime.
+ *
+ * After executing all tests the system is reset.
+ *
+ * @image_handle:	handle of the loaded EFI image
+ * @systab:		EFI system table
+ */
+efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
+				 struct efi_system_table *systab)
+{
+	struct efi_unit_test *test;
+	unsigned int failures = 0;
+
+	systable = systab;
+	boottime = systable->boottime;
+	runtime = systable->runtime;
+	handle = image_handle;
+	con_out = systable->con_out;
+	con_in = systable->con_in;
+
+	efi_st_printf("\nTesting EFI API implementation\n");
+
+	efi_st_printf("\nNumber of tests to execute: %u\n",
+		      ll_entry_count(struct efi_unit_test, efi_unit_test));
+
+	/* Execute boottime tests */
+	for (test = ll_entry_start(struct efi_unit_test, efi_unit_test);
+	     test < ll_entry_end(struct efi_unit_test, efi_unit_test); ++test) {
+		if (test->phase == EFI_EXECUTE_BEFORE_BOOTTIME_EXIT) {
+			setup(test, &failures);
+			execute(test, &failures);
+			teardown(test, &failures);
+		}
+	}
+
+	/* Execute mixed tests */
+	for (test = ll_entry_start(struct efi_unit_test, efi_unit_test);
+	     test < ll_entry_end(struct efi_unit_test, efi_unit_test); ++test) {
+		if (test->phase == EFI_SETUP_BEFORE_BOOTTIME_EXIT)
+			setup(test, &failures);
+	}
+
+	efi_st_exit_boot_services();
+
+	for (test = ll_entry_start(struct efi_unit_test, efi_unit_test);
+	     test < ll_entry_end(struct efi_unit_test, efi_unit_test); ++test) {
+		if (test->phase == EFI_SETUP_BEFORE_BOOTTIME_EXIT) {
+			execute(test, &failures);
+			teardown(test, &failures);
+		}
+	}
+
+	/* Execute runtime tests */
+	for (test = ll_entry_start(struct efi_unit_test, efi_unit_test);
+	     test < ll_entry_end(struct efi_unit_test, efi_unit_test); ++test) {
+		if (test->phase == EFI_SETUP_AFTER_BOOTTIME_EXIT) {
+			setup(test, &failures);
+			execute(test, &failures);
+			teardown(test, &failures);
+		}
+	}
+
+	/* Give feedback */
+	efi_st_printf("\nSummary: %u failures\n\n", failures);
+
+	/* Reset system */
+	efi_st_printf("Preparing for reset. Press any key.\n");
+	efi_st_get_key();
+	runtime->reset_system(EFI_RESET_WARM, EFI_NOT_READY,
+			      sizeof(reset_message), reset_message);
+	efi_st_printf("\nERROR: reset failed.\n");
+
+	return EFI_UNSUPPORTED;
+}