[PATCH v7 5/6] test: Add sandbox TPM boot measurement

Eddie James
2023-03-01T22:52:17Z

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 7e7fcff6d2..3442be7634 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 {
};

@@ -336,6 +348,7 @@

tpm2 {
compatible = "sandbox,tpm2";
+ memory-region = <&event_log>;
};

triangle {
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 9717103f10..7659effa71 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>
@@ -66,6 +67,17 @@
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 {
};

@@ -1365,6 +1377,7 @@

tpm2 {
compatible = "sandbox,tpm2";
+ memory-region = <&event_log>;
};

tpm {
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 77ade1f1d8..43b15b8446 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 7c4960c004..b552fea9a9 100644
--- a/include/test/suites.h
+++ b/include/test/suites.h
@@ -44,6 +44,7 @@ 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 22ed61c8fa..2dbb032a7e 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

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 409c22bfd2..25b873d0ea 100644
--- a/test/cmd_ut.c
+++ b/test/cmd_ut.c
@@ -96,6 +96,10 @@ 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,
"", ""),
--
2.31.1