[PATCH v2 5/5] test: Add sandbox TPM boot measurement

[Eddie James]

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

$ ./u-boot -T -c "ut measurement"
Running 1 measurement tests
Test: measure: measurement.c
Failures: 0

Signed-off-by: Eddie James <eajames at linux.ibm.com>
---
 arch/sandbox/dts/test.dts | 12 +++++++
 configs/sandbox_defconfig |  1 +
 include/test/suites.h     |  1 +
 test/boot/Makefile        |  1 +
 test/boot/measurement.c   | 66 +++++++++++++++++++++++++++++++++++++++
 test/cmd_ut.c             |  2 ++
 6 files changed, 83 insertions(+)
 create mode 100644 test/boot/measurement.c

diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index dffe10adbf..ad90bf0541 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -66,6 +66,17 @@
 		osd0 = "/osd";
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		event_log: tcg_event_log at d0e000 {
+			no-map;
+			reg = <0x00d0e000 0x2000>;
+		};
+	};
+
 	binman: binman {
 	};
 
@@ -1332,6 +1343,7 @@
 
 	tpm2 {
 		compatible = "sandbox,tpm2";
+		memory-region = <&event_log>;
 	};
 
 	uart0: serial {
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index de799b5cea..5ac115f2d8 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -335,3 +335,4 @@ CONFIG_TEST_FDTDEC=y
 CONFIG_UNIT_TEST=y
 CONFIG_UT_TIME=y
 CONFIG_UT_DM=y
+CONFIG_MEASURED_BOOT=y
diff --git a/include/test/suites.h b/include/test/suites.h
index a01000e127..f9284871b0 100644
--- a/include/test/suites.h
+++ b/include/test/suites.h
@@ -43,6 +43,7 @@ int do_ut_font(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_lib(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_loadm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_log(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]);
+int do_ut_measurement(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]);
 int do_ut_mem(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_optee(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_overlay(struct cmd_tbl *cmdtp, int flag, int argc,
diff --git a/test/boot/Makefile b/test/boot/Makefile
index d724629d3b..24cc20bdff 100644
--- a/test/boot/Makefile
+++ b/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
 
 ifdef CONFIG_OF_LIVE
 obj-$(CONFIG_BOOTMETH_VBE_SIMPLE) += vbe_simple.o
diff --git a/test/boot/measurement.c b/test/boot/measurement.c
new file mode 100644
index 0000000000..2155208894
--- /dev/null
+++ b/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 at 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] = (u8)(0xf0 | (i & 0xf));
+		initrd[i] = (u8)((i & 0xf0) | 0xf);
+		((u8 *)images.ft_addr)[i] = (u8)(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);
+}
diff --git a/test/cmd_ut.c b/test/cmd_ut.c
index 2736582f11..819031c0f8 100644
--- a/test/cmd_ut.c
+++ b/test/cmd_ut.c
@@ -100,6 +100,8 @@ static struct cmd_tbl cmd_ut_sub[] = {
 			 "", ""),
 	U_BOOT_CMD_MKENT(bloblist, CONFIG_SYS_MAXARGS, 1, do_ut_bloblist,
 			 "", ""),
+	U_BOOT_CMD_MKENT(measurement, CONFIG_SYS_MAXARGS, 1, do_ut_measurement,
+			 "", ""),
 	U_BOOT_CMD_MKENT(bootm, CONFIG_SYS_MAXARGS, 1, do_ut_bootm, "", ""),
 #endif
 	U_BOOT_CMD_MKENT(str, CONFIG_SYS_MAXARGS, 1, do_ut_str, "", ""),
-- 
2.31.1