test: Add sandbox TPM boot measurement

Use the sandbox TPM driver to measure some boot images in a unit
test case.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

test/boot/Makefile

@@ -4,6 +4,7 @@
 
 obj-$(CONFIG_BOOTSTD) += bootdev.o bootstd_common.o bootflow.o bootmeth.o
 obj-$(CONFIG_FIT) += image.o
+obj-$(CONFIG_MEASURED_BOOT) += measurement.o
 
 obj-$(CONFIG_EXPO) += expo.o
 obj-$(CONFIG_CEDIT) += cedit.o

test/boot/measurement.c

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test for measured boot functions
+ *
+ * Copyright 2023 IBM Corp.
+ * Written by Eddie James <eajames@linux.ibm.com>
+ */
+
+#include <common.h>
+#include <bootm.h>
+#include <malloc.h>
+#include <test/suites.h>
+#include <test/test.h>
+#include <test/ut.h>
+#include <asm/io.h>
+
+#define MEASUREMENT_TEST(_name, _flags)	\
+	UNIT_TEST(_name, _flags, measurement_test)
+
+static int measure(struct unit_test_state *uts)
+{
+	struct bootm_headers images;
+	const size_t size = 1024;
+	u8 *kernel;
+	u8 *initrd;
+	size_t i;
+
+	kernel = malloc(size);
+	initrd = malloc(size);
+
+	images.os.image_start = map_to_sysmem(kernel);
+	images.os.image_len = size;
+
+	images.rd_start = map_to_sysmem(initrd);
+	images.rd_end = images.rd_start + size;
+
+	images.ft_addr = malloc(size);
+	images.ft_len = size;
+
+	env_set("bootargs", "measurement testing");
+
+	for (i = 0; i < size; ++i) {
+		kernel[i] = 0xf0 | (i & 0xf);
+		initrd[i] = (i & 0xf0) | 0xf;
+		images.ft_addr[i] = i & 0xff;
+	}
+
+	ut_assertok(bootm_measure(&images));
+
+	free(images.ft_addr);
+	free(initrd);
+	free(kernel);
+
+	return 0;
+}
+MEASUREMENT_TEST(measure, 0);
+
+int do_ut_measurement(struct cmd_tbl *cmdtp, int flag, int argc,
+		      char *const argv[])
+{
+	struct unit_test *tests = UNIT_TEST_SUITE_START(measurement_test);
+	const int n_ents = UNIT_TEST_SUITE_COUNT(measurement_test);
+
+	return cmd_ut_category("measurement", "measurement_test_", tests,
+			       n_ents, argc, argv);
+}