[PATCH v14 5/8] test: Add sandbox TPM boot measurement

[Eddie James <eajames@linux.ibm.com>]

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>
---
Changes since v5:
 - Only compile in the measurement u-boot command when
   CONFIG_MEASURED_BOOT is enabled.

 arch/sandbox/dts/sandbox.dtsi | 13 +++++++
 arch/sandbox/dts/test.dts     | 13 +++++++
 configs/sandbox_defconfig     |  1 +
 include/test/suites.h         |  1 +
 test/boot/Makefile            |  1 +
 test/boot/measurement.c       | 66 +++++++++++++++++++++++++++++++++++
 test/cmd_ut.c                 |  4 +++
 7 files changed, 99 insertions(+)
 create mode 100644 test/boot/measurement.c

diff --git a/arch/sandbox/dts/sandbox.dtsi b/arch/sandbox/dts/sandbox.dtsi
index ff7e5584c5..241f397ba6 100644
--- a/arch/sandbox/dts/sandbox.dtsi
+++ b/arch/sandbox/dts/sandbox.dtsi
@@ -4,11 +4,23 @@
  * and sandbox64 builds.
  */
 
+#include <config.h>
 #include <dt-bindings/input/input.h>
 
 #define USB_CLASS_HUB			9
 
 / {
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		event_log: tcg_event_log {
+			no-map;
+			reg = <(CFG_SYS_SDRAM_SIZE - 0x2000) 0x2000>;
+		};
+	};
+
 	binman {
 	};
 
@@ -342,6 +354,7 @@
 
 	tpm2 {
 		compatible = "sandbox,tpm2";
+		memory-region = <&event_log>;
 	};
 
 	triangle {
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index e430347356..67159b3d01 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -9,6 +9,7 @@
 
 /dts-v1/;
 
+#include <config.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/gpio/sandbox-gpio.h>
 #include <dt-bindings/input/input.h>
@@ -68,6 +69,17 @@
 		osd0 = "/osd";
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		event_log: tcg_event_log {
+			no-map;
+			reg = <(CFG_SYS_SDRAM_SIZE - 0x2000) 0x2000>;
+		};
+	};
+
 	binman: binman {
 	};
 
@@ -1423,6 +1435,7 @@
 
 	tpm2 {
 		compatible = "sandbox,tpm2";
+		memory-region = <&event_log>;
 	};
 
 	tpm {
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 47417cb039..757dcac4ca 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -349,3 +349,4 @@ 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 1c7dc65966..48ed549c13 100644
--- a/include/test/suites.h
+++ b/include/test/suites.h
@@ -45,6 +45,7 @@ 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 52947580ae..068522cb9e 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
 
 obj-$(CONFIG_EXPO) += expo.o
 obj-$(CONFIG_CEDIT) += cedit.o
diff --git a/test/boot/measurement.c b/test/boot/measurement.c
new file mode 100644
index 0000000000..9db2ed324c
--- /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@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);
+}
diff --git a/test/cmd_ut.c b/test/cmd_ut.c
index 477d475952..32d270fc89 100644
--- a/test/cmd_ut.c
+++ b/test/cmd_ut.c
@@ -99,6 +99,10 @@ static struct cmd_tbl cmd_ut_sub[] = {
 #if CONFIG_IS_ENABLED(UT_UNICODE) && !defined(API_BUILD)
 	U_BOOT_CMD_MKENT(unicode, CONFIG_SYS_MAXARGS, 1, do_ut_unicode, "", ""),
 #endif
+#ifdef CONFIG_MEASURED_BOOT
+	U_BOOT_CMD_MKENT(measurement, CONFIG_SYS_MAXARGS, 1, do_ut_measurement,
+			 "", ""),
+#endif
 #ifdef CONFIG_SANDBOX
 	U_BOOT_CMD_MKENT(compression, CONFIG_SYS_MAXARGS, 1, do_ut_compression,
 			 "", ""),
-- 
2.39.3