[J-u-boot.git] / cmd / tpm_test.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2015 Google, Inc
 */

#include <common.h>
#include <command.h>
#include <tpm-v1.h>
#include "tpm-user-utils.h"

/* Prints error and returns on failure */
#define TPM_CHECK(tpm_command) do { \
	uint32_t result; \
	\
	result = (tpm_command); \
	if (result != TPM_SUCCESS) { \
		printf("TEST FAILED: line %d: " #tpm_command ": 0x%x\n", \
			__LINE__, result); \
		return result; \
	} \
} while (0)

#define INDEX0			0xda70
#define INDEX1			0xda71
#define INDEX2			0xda72
#define INDEX3			0xda73
#define INDEX_INITIALISED	0xda80
#define PHYS_PRESENCE		4
#define PRESENCE		8

static uint32_t TlclStartupIfNeeded(struct udevice *dev)
{
	uint32_t result = tpm_startup(dev, TPM_ST_CLEAR);

	return result == TPM_INVALID_POSTINIT ? TPM_SUCCESS : result;
}

static int test_timer(struct udevice *dev)
{
	printf("get_timer(0) = %lu\n", get_timer(0));
	return 0;
}

static uint32_t tpm_get_flags(struct udevice *dev, uint8_t *disable,
			      uint8_t *deactivated, uint8_t *nvlocked)
{
	struct tpm_permanent_flags pflags;
	uint32_t result;

	result = tpm_get_permanent_flags(dev, &pflags);
	if (result)
		return result;
	if (disable)
		*disable = pflags.disable;
	if (deactivated)
		*deactivated = pflags.deactivated;
	if (nvlocked)
		*nvlocked = pflags.nv_locked;
	debug("TPM: Got flags disable=%d, deactivated=%d, nvlocked=%d\n",
	      pflags.disable, pflags.deactivated, pflags.nv_locked);

	return 0;
}

static uint32_t tpm_nv_write_value_lock(struct udevice *dev, uint32_t index)
{
	debug("TPM: Write lock 0x%x\n", index);

	return tpm_nv_write_value(dev, index, NULL, 0);
}

static int tpm_is_owned(struct udevice *dev)
{
	uint8_t response[TPM_PUBEK_SIZE];
	uint32_t result;

	result = tpm_read_pubek(dev, response, sizeof(response));

	return result != TPM_SUCCESS;
}

static int test_early_extend(struct udevice *dev)
{
	uint8_t value_in[20];
	uint8_t value_out[20];

	printf("Testing earlyextend ...");
	tpm_init(dev);
	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
	TPM_CHECK(tpm_continue_self_test(dev));
	TPM_CHECK(tpm_extend(dev, 1, value_in, value_out));
	printf("done\n");
	return 0;
}

static int test_early_nvram(struct udevice *dev)
{
	uint32_t x;

	printf("Testing earlynvram ...");
	tpm_init(dev);
	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
	TPM_CHECK(tpm_continue_self_test(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
	printf("done\n");
	return 0;
}

static int test_early_nvram2(struct udevice *dev)
{
	uint32_t x;

	printf("Testing earlynvram2 ...");
	tpm_init(dev);
	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
	TPM_CHECK(tpm_continue_self_test(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
	printf("done\n");
	return 0;
}

static int test_enable(struct udevice *dev)
{
	uint8_t disable = 0, deactivated = 0;

	printf("Testing enable ...\n");
	tpm_init(dev);
	TPM_CHECK(TlclStartupIfNeeded(dev));
	TPM_CHECK(tpm_self_test_full(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
	TPM_CHECK(tpm_physical_enable(dev));
	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
	if (disable == 1 || deactivated == 1)
		printf("\tfailed to enable or activate\n");
	printf("\tdone\n");
	return 0;
}

#define reboot() do { \
	printf("\trebooting...\n"); \
	reset_cpu(0); \
} while (0)

static int test_fast_enable(struct udevice *dev)
{
	uint8_t disable = 0, deactivated = 0;
	int i;

	printf("Testing fastenable ...\n");
	tpm_init(dev);
	TPM_CHECK(TlclStartupIfNeeded(dev));
	TPM_CHECK(tpm_self_test_full(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
	for (i = 0; i < 2; i++) {
		TPM_CHECK(tpm_force_clear(dev));
		TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
		printf("\tdisable is %d, deactivated is %d\n", disable,
		       deactivated);
		assert(disable == 1 && deactivated == 1);
		TPM_CHECK(tpm_physical_enable(dev));
		TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
		TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
		printf("\tdisable is %d, deactivated is %d\n", disable,
		       deactivated);
		assert(disable == 0 && deactivated == 0);
	}
	printf("\tdone\n");
	return 0;
}

static int test_global_lock(struct udevice *dev)
{
	uint32_t zero = 0;
	uint32_t result;
	uint32_t x;

	printf("Testing globallock ...\n");
	tpm_init(dev);
	TPM_CHECK(TlclStartupIfNeeded(dev));
	TPM_CHECK(tpm_self_test_full(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&zero,
				     sizeof(uint32_t)));
	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
	TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (uint8_t *)&zero,
				     sizeof(uint32_t)));
	TPM_CHECK(tpm_set_global_lock(dev));
	/* Verifies that write to index0 fails */
	x = 1;
	result = tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x));
	assert(result == TPM_AREA_LOCKED);
	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
	assert(x == 0);
	/* Verifies that write to index1 is still possible */
	x = 2;
	TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
	assert(x == 2);
	/* Turns off PP */
	tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
	/* Verifies that write to index1 fails */
	x = 3;
	result = tpm_nv_write_value(dev, INDEX1, (uint8_t *)&x, sizeof(x));
	assert(result == TPM_BAD_PRESENCE);
	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
	assert(x == 2);
	printf("\tdone\n");
	return 0;
}

static int test_lock(struct udevice *dev)
{
	printf("Testing lock ...\n");
	tpm_init(dev);
	tpm_startup(dev, TPM_ST_CLEAR);
	tpm_self_test_full(dev);
	tpm_tsc_physical_presence(dev, PRESENCE);
	tpm_nv_write_value_lock(dev, INDEX0);
	printf("\tLocked 0x%x\n", INDEX0);
	printf("\tdone\n");
	return 0;
}

static void initialise_spaces(struct udevice *dev)
{
	uint32_t zero = 0;
	uint32_t perm = TPM_NV_PER_WRITE_STCLEAR | TPM_NV_PER_PPWRITE;

	printf("\tInitialising spaces\n");
	tpm_nv_set_locked(dev);  /* useful only the first time */
	tpm_nv_define_space(dev, INDEX0, perm, 4);
	tpm_nv_write_value(dev, INDEX0, (uint8_t *)&zero, 4);
	tpm_nv_define_space(dev, INDEX1, perm, 4);
	tpm_nv_write_value(dev, INDEX1, (uint8_t *)&zero, 4);
	tpm_nv_define_space(dev, INDEX2, perm, 4);
	tpm_nv_write_value(dev, INDEX2, (uint8_t *)&zero, 4);
	tpm_nv_define_space(dev, INDEX3, perm, 4);
	tpm_nv_write_value(dev, INDEX3, (uint8_t *)&zero, 4);
	perm = TPM_NV_PER_READ_STCLEAR | TPM_NV_PER_WRITE_STCLEAR |
		TPM_NV_PER_PPWRITE;
	tpm_nv_define_space(dev, INDEX_INITIALISED, perm, 1);
}

static int test_readonly(struct udevice *dev)
{
	uint8_t c;
	uint32_t index_0, index_1, index_2, index_3;
	int read0, read1, read2, read3;

	printf("Testing readonly ...\n");
	tpm_init(dev);
	tpm_startup(dev, TPM_ST_CLEAR);
	tpm_self_test_full(dev);
	tpm_tsc_physical_presence(dev, PRESENCE);
	/*
	 * Checks if initialisation has completed by trying to read-lock a
	 * space that's created at the end of initialisation
	 */
	if (tpm_nv_read_value(dev, INDEX_INITIALISED, &c, 0) == TPM_BADINDEX) {
		/* The initialisation did not complete */
		initialise_spaces(dev);
	}

	/* Checks if spaces are OK or messed up */
	read0 = tpm_nv_read_value(dev, INDEX0, (uint8_t *)&index_0,
				  sizeof(index_0));
	read1 = tpm_nv_read_value(dev, INDEX1, (uint8_t *)&index_1,
				  sizeof(index_1));
	read2 = tpm_nv_read_value(dev, INDEX2, (uint8_t *)&index_2,
				  sizeof(index_2));
	read3 = tpm_nv_read_value(dev, INDEX3, (uint8_t *)&index_3,
				  sizeof(index_3));
	if (read0 || read1 || read2 || read3) {
		printf("Invalid contents\n");
		return 0;
	}

	/*
	 * Writes space, and locks it.  Then attempts to write again.
	 * I really wish I could use the imperative.
	 */
	index_0 += 1;
	if (tpm_nv_write_value(dev, INDEX0, (uint8_t *)&index_0,
			       sizeof(index_0) !=
		TPM_SUCCESS)) {
		pr_err("\tcould not write index 0\n");
	}
	tpm_nv_write_value_lock(dev, INDEX0);
	if (tpm_nv_write_value(dev, INDEX0, (uint8_t *)&index_0,
			       sizeof(index_0)) ==
			TPM_SUCCESS)
		pr_err("\tindex 0 is not locked\n");

	printf("\tdone\n");
	return 0;
}

static int test_redefine_unowned(struct udevice *dev)
{
	uint32_t perm;
	uint32_t result;
	uint32_t x;

	printf("Testing redefine_unowned ...");
	tpm_init(dev);
	TPM_CHECK(TlclStartupIfNeeded(dev));
	TPM_CHECK(tpm_self_test_full(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	assert(!tpm_is_owned(dev));

	/* Ensures spaces exist. */
	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));

	/* Redefines spaces a couple of times. */
	perm = TPM_NV_PER_PPWRITE | TPM_NV_PER_GLOBALLOCK;
	TPM_CHECK(tpm_nv_define_space(dev, INDEX0, perm, 2 * sizeof(uint32_t)));
	TPM_CHECK(tpm_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t)));
	perm = TPM_NV_PER_PPWRITE;
	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, 2 * sizeof(uint32_t)));
	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t)));

	/* Sets the global lock */
	tpm_set_global_lock(dev);

	/* Verifies that index0 cannot be redefined */
	result = tpm_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t));
	assert(result == TPM_AREA_LOCKED);

	/* Checks that index1 can */
	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, 2 * sizeof(uint32_t)));
	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t)));

	/* Turns off PP */
	tpm_tsc_physical_presence(dev, PHYS_PRESENCE);

	/* Verifies that neither index0 nor index1 can be redefined */
	result = tpm_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t));
	assert(result == TPM_BAD_PRESENCE);
	result = tpm_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t));
	assert(result == TPM_BAD_PRESENCE);

	printf("done\n");
	return 0;
}

#define PERMPPGL (TPM_NV_PER_PPWRITE | TPM_NV_PER_GLOBALLOCK)
#define PERMPP TPM_NV_PER_PPWRITE

static int test_space_perm(struct udevice *dev)
{
	uint32_t perm;

	printf("Testing spaceperm ...");
	tpm_init(dev);
	TPM_CHECK(TlclStartupIfNeeded(dev));
	TPM_CHECK(tpm_continue_self_test(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_get_permissions(dev, INDEX0, &perm));
	assert((perm & PERMPPGL) == PERMPPGL);
	TPM_CHECK(tpm_get_permissions(dev, INDEX1, &perm));
	assert((perm & PERMPP) == PERMPP);
	printf("done\n");
	return 0;
}

static int test_startup(struct udevice *dev)
{
	uint32_t result;

	printf("Testing startup ...\n");

	tpm_init(dev);
	result = tpm_startup(dev, TPM_ST_CLEAR);
	if (result != 0 && result != TPM_INVALID_POSTINIT)
		printf("\ttpm startup failed with 0x%x\n", result);
	result = tpm_get_flags(dev, NULL, NULL, NULL);
	if (result != 0)
		printf("\ttpm getflags failed with 0x%x\n", result);
	printf("\texecuting SelfTestFull\n");
	tpm_self_test_full(dev);
	result = tpm_get_flags(dev, NULL, NULL, NULL);
	if (result != 0)
		printf("\ttpm getflags failed with 0x%x\n", result);
	printf("\tdone\n");
	return 0;
}

/*
 * Runs [op] and ensures it returns success and doesn't run longer than
 * [time_limit] in milliseconds.
 */
#define TTPM_CHECK(op, time_limit) do { \
	ulong start, time; \
	uint32_t __result; \
	\
	start = get_timer(0); \
	__result = op; \
	if (__result != TPM_SUCCESS) { \
		printf("\t" #op ": error 0x%x\n", __result); \
		return -1; \
	} \
	time = get_timer(start); \
	printf("\t" #op ": %lu ms\n", time); \
	if (time > (ulong)time_limit) { \
		printf("\t" #op " exceeded " #time_limit " ms\n"); \
	} \
} while (0)


static int test_timing(struct udevice *dev)
{
	uint8_t in[20], out[20];
	uint32_t x;

	printf("Testing timing ...");
	tpm_init(dev);
	TTPM_CHECK(TlclStartupIfNeeded(dev), 50);
	TTPM_CHECK(tpm_continue_self_test(dev), 100);
	TTPM_CHECK(tpm_self_test_full(dev), 1000);
	TTPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE), 100);
	TTPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)),
		   100);
	TTPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)),
		   100);
	TTPM_CHECK(tpm_extend(dev, 0, in, out), 200);
	TTPM_CHECK(tpm_set_global_lock(dev), 50);
	TTPM_CHECK(tpm_tsc_physical_presence(dev, PHYS_PRESENCE), 100);
	printf("done\n");
	return 0;
}

#define TPM_MAX_NV_WRITES_NOOWNER 64

static int test_write_limit(struct udevice *dev)
{
	uint32_t result;
	int i;

	printf("Testing writelimit ...\n");
	tpm_init(dev);
	TPM_CHECK(TlclStartupIfNeeded(dev));
	TPM_CHECK(tpm_self_test_full(dev));
	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	TPM_CHECK(tpm_force_clear(dev));
	TPM_CHECK(tpm_physical_enable(dev));
	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));

	for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
		printf("\twriting %d\n", i);
		result = tpm_nv_write_value(dev, INDEX0, (uint8_t *)&i,
					    sizeof(i));
		switch (result) {
		case TPM_SUCCESS:
			break;
		case TPM_MAXNVWRITES:
			assert(i >= TPM_MAX_NV_WRITES_NOOWNER);
		default:
			pr_err("\tunexpected error code %d (0x%x)\n",
			      result, result);
		}
	}

	/* Reset write count */
	TPM_CHECK(tpm_force_clear(dev));
	TPM_CHECK(tpm_physical_enable(dev));
	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));

	/* Try writing again. */
	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&i, sizeof(i)));
	printf("\tdone\n");
	return 0;
}

#define VOIDTEST(XFUNC) \
	int do_test_##XFUNC(cmd_tbl_t *cmd_tbl, int flag, int argc, \
	char * const argv[]) \
	{ \
		struct udevice *dev; \
		int ret; \
\
		ret = get_tpm(&dev); \
		if (ret) \
			return ret; \
		return test_##XFUNC(dev); \
	}

#define VOIDENT(XNAME) \
	U_BOOT_CMD_MKENT(XNAME, 0, 1, do_test_##XNAME, "", ""),

VOIDTEST(early_extend)
VOIDTEST(early_nvram)
VOIDTEST(early_nvram2)
VOIDTEST(enable)
VOIDTEST(fast_enable)
VOIDTEST(global_lock)
VOIDTEST(lock)
VOIDTEST(readonly)
VOIDTEST(redefine_unowned)
VOIDTEST(space_perm)
VOIDTEST(startup)
VOIDTEST(timing)
VOIDTEST(write_limit)
VOIDTEST(timer)

static cmd_tbl_t cmd_cros_tpm_sub[] = {
	VOIDENT(early_extend)
	VOIDENT(early_nvram)
	VOIDENT(early_nvram2)
	VOIDENT(enable)
	VOIDENT(fast_enable)
	VOIDENT(global_lock)
	VOIDENT(lock)
	VOIDENT(readonly)
	VOIDENT(redefine_unowned)
	VOIDENT(space_perm)
	VOIDENT(startup)
	VOIDENT(timing)
	VOIDENT(write_limit)
	VOIDENT(timer)
};

static int do_tpmtest(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	cmd_tbl_t *c;
	int i;

	printf("argc = %d, argv = ", argc);

	for (i = 0; i < argc; i++)
		printf(" %s", argv[i]);

	printf("\n------\n");

	argc--;
	argv++;
	c = find_cmd_tbl(argv[0], cmd_cros_tpm_sub,
			 ARRAY_SIZE(cmd_cros_tpm_sub));
	return c ? c->cmd(cmdtp, flag, argc, argv) : cmd_usage(cmdtp);
}

U_BOOT_CMD(tpmtest, 2, 1, do_tpmtest, "TPM tests",
	"\n\tearly_extend\n"
	"\tearly_nvram\n"
	"\tearly_nvram2\n"
	"\tenable\n"
	"\tfast_enable\n"
	"\tglobal_lock\n"
	"\tlock\n"
	"\treadonly\n"
	"\tredefine_unowned\n"
	"\tspace_perm\n"
	"\tstartup\n"
	"\ttiming\n"
	"\twrite_limit\n");
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
e76cb927 SG	2	/*
e76cb927 SG	3	* Copyright (c) 2015 Google, Inc
e76cb927 SG	4	*/
	5
	6	#include <common.h>
	7	#include <command.h>
d677bfe2	8	#include <tpm-v1.h>
abdc7b8a	9	#include "tpm-user-utils.h"
e76cb927 SG	10
	11	/* Prints error and returns on failure */
	12	#define TPM_CHECK(tpm_command) do { \
	13	uint32_t result; \
	14	\
	15	result = (tpm_command); \
	16	if (result != TPM_SUCCESS) { \
	17	printf("TEST FAILED: line %d: " #tpm_command ": 0x%x\n", \
	18	__LINE__, result); \
	19	return result; \
	20	} \
	21	} while (0)
	22
	23	#define INDEX0 0xda70
	24	#define INDEX1 0xda71
	25	#define INDEX2 0xda72
	26	#define INDEX3 0xda73
	27	#define INDEX_INITIALISED 0xda80
	28	#define PHYS_PRESENCE 4
	29	#define PRESENCE 8
	30
abdc7b8a	31	static uint32_t TlclStartupIfNeeded(struct udevice *dev)
e76cb927	32	{
abdc7b8a	33	uint32_t result = tpm_startup(dev, TPM_ST_CLEAR);
e76cb927 SG	34
	35	return result == TPM_INVALID_POSTINIT ? TPM_SUCCESS : result;
	36	}
	37
abdc7b8a	38	static int test_timer(struct udevice *dev)
e76cb927 SG	39	{
	40	printf("get_timer(0) = %lu\n", get_timer(0));
	41	return 0;
	42	}
	43
abdc7b8a SG	44	static uint32_t tpm_get_flags(struct udevice dev, uint8_t disable,
abdc7b8a SG	45	uint8_t deactivated, uint8_t nvlocked)
e76cb927 SG	46	{
	47	struct tpm_permanent_flags pflags;
	48	uint32_t result;
	49
abdc7b8a	50	result = tpm_get_permanent_flags(dev, &pflags);
e76cb927 SG	51	if (result)
	52	return result;
	53	if (disable)
	54	*disable = pflags.disable;
	55	if (deactivated)
	56	*deactivated = pflags.deactivated;
	57	if (nvlocked)
	58	*nvlocked = pflags.nv_locked;
	59	debug("TPM: Got flags disable=%d, deactivated=%d, nvlocked=%d\n",
	60	pflags.disable, pflags.deactivated, pflags.nv_locked);
	61
	62	return 0;
	63	}
	64
abdc7b8a	65	static uint32_t tpm_nv_write_value_lock(struct udevice *dev, uint32_t index)
e76cb927 SG	66	{
	67	debug("TPM: Write lock 0x%x\n", index);
	68
abdc7b8a	69	return tpm_nv_write_value(dev, index, NULL, 0);
e76cb927 SG	70	}
e76cb927 SG	71
abdc7b8a	72	static int tpm_is_owned(struct udevice *dev)
e76cb927 SG	73	{
	74	uint8_t response[TPM_PUBEK_SIZE];
	75	uint32_t result;
	76
abdc7b8a	77	result = tpm_read_pubek(dev, response, sizeof(response));
e76cb927 SG	78
	79	return result != TPM_SUCCESS;
	80	}
	81
abdc7b8a	82	static int test_early_extend(struct udevice *dev)
e76cb927 SG	83	{
	84	uint8_t value_in[20];
	85	uint8_t value_out[20];
	86
	87	printf("Testing earlyextend ...");
abdc7b8a SG	88	tpm_init(dev);
	89	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
	90	TPM_CHECK(tpm_continue_self_test(dev));
	91	TPM_CHECK(tpm_extend(dev, 1, value_in, value_out));
e76cb927 SG	92	printf("done\n");
	93	return 0;
	94	}
	95
abdc7b8a	96	static int test_early_nvram(struct udevice *dev)
e76cb927 SG	97	{
	98	uint32_t x;
	99
	100	printf("Testing earlynvram ...");
abdc7b8a SG	101	tpm_init(dev);
	102	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
	103	TPM_CHECK(tpm_continue_self_test(dev));
	104	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	105	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
e76cb927 SG	106	printf("done\n");
	107	return 0;
	108	}
	109
abdc7b8a	110	static int test_early_nvram2(struct udevice *dev)
e76cb927 SG	111	{
	112	uint32_t x;
	113
	114	printf("Testing earlynvram2 ...");
abdc7b8a SG	115	tpm_init(dev);
	116	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
	117	TPM_CHECK(tpm_continue_self_test(dev));
	118	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	119	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
e76cb927 SG	120	printf("done\n");
	121	return 0;
	122	}
	123
abdc7b8a	124	static int test_enable(struct udevice *dev)
e76cb927 SG	125	{
	126	uint8_t disable = 0, deactivated = 0;
	127
	128	printf("Testing enable ...\n");
abdc7b8a SG	129	tpm_init(dev);
	130	TPM_CHECK(TlclStartupIfNeeded(dev));
	131	TPM_CHECK(tpm_self_test_full(dev));
	132	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	133	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
e76cb927	134	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
abdc7b8a SG	135	TPM_CHECK(tpm_physical_enable(dev));
	136	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
	137	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
e76cb927 SG	138	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
	139	if (disable == 1 \|\| deactivated == 1)
	140	printf("\tfailed to enable or activate\n");
	141	printf("\tdone\n");
	142	return 0;
	143	}
	144
	145	#define reboot() do { \
	146	printf("\trebooting...\n"); \
	147	reset_cpu(0); \
	148	} while (0)
	149
abdc7b8a	150	static int test_fast_enable(struct udevice *dev)
e76cb927 SG	151	{
	152	uint8_t disable = 0, deactivated = 0;
	153	int i;
	154
	155	printf("Testing fastenable ...\n");
abdc7b8a SG	156	tpm_init(dev);
	157	TPM_CHECK(TlclStartupIfNeeded(dev));
	158	TPM_CHECK(tpm_self_test_full(dev));
	159	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	160	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
e76cb927 SG	161	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
e76cb927 SG	162	for (i = 0; i < 2; i++) {
abdc7b8a SG	163	TPM_CHECK(tpm_force_clear(dev));
abdc7b8a SG	164	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
e76cb927 SG	165	printf("\tdisable is %d, deactivated is %d\n", disable,
	166	deactivated);
	167	assert(disable == 1 && deactivated == 1);
abdc7b8a SG	168	TPM_CHECK(tpm_physical_enable(dev));
	169	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
	170	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
e76cb927 SG	171	printf("\tdisable is %d, deactivated is %d\n", disable,
	172	deactivated);
	173	assert(disable == 0 && deactivated == 0);
	174	}
	175	printf("\tdone\n");
	176	return 0;
	177	}
	178
abdc7b8a	179	static int test_global_lock(struct udevice *dev)
e76cb927 SG	180	{
	181	uint32_t zero = 0;
	182	uint32_t result;
	183	uint32_t x;
	184
	185	printf("Testing globallock ...\n");
abdc7b8a SG	186	tpm_init(dev);
	187	TPM_CHECK(TlclStartupIfNeeded(dev));
	188	TPM_CHECK(tpm_self_test_full(dev));
	189	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	190	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
	191	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&zero,
e76cb927	192	sizeof(uint32_t)));
abdc7b8a SG	193	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
abdc7b8a SG	194	TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (uint8_t *)&zero,
e76cb927	195	sizeof(uint32_t)));
abdc7b8a	196	TPM_CHECK(tpm_set_global_lock(dev));
e76cb927 SG	197	/* Verifies that write to index0 fails */
e76cb927 SG	198	x = 1;
abdc7b8a	199	result = tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x));
e76cb927	200	assert(result == TPM_AREA_LOCKED);
abdc7b8a	201	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
e76cb927 SG	202	assert(x == 0);
	203	/* Verifies that write to index1 is still possible */
	204	x = 2;
abdc7b8a SG	205	TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
abdc7b8a SG	206	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
e76cb927 SG	207	assert(x == 2);
e76cb927 SG	208	/* Turns off PP */
abdc7b8a	209	tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
e76cb927 SG	210	/* Verifies that write to index1 fails */
e76cb927 SG	211	x = 3;
abdc7b8a	212	result = tpm_nv_write_value(dev, INDEX1, (uint8_t *)&x, sizeof(x));
e76cb927	213	assert(result == TPM_BAD_PRESENCE);
abdc7b8a	214	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
e76cb927 SG	215	assert(x == 2);
	216	printf("\tdone\n");
	217	return 0;
	218	}
	219
abdc7b8a	220	static int test_lock(struct udevice *dev)
e76cb927 SG	221	{
e76cb927 SG	222	printf("Testing lock ...\n");
abdc7b8a SG	223	tpm_init(dev);
	224	tpm_startup(dev, TPM_ST_CLEAR);
	225	tpm_self_test_full(dev);
	226	tpm_tsc_physical_presence(dev, PRESENCE);
	227	tpm_nv_write_value_lock(dev, INDEX0);
e76cb927 SG	228	printf("\tLocked 0x%x\n", INDEX0);
	229	printf("\tdone\n");
	230	return 0;
	231	}
	232
abdc7b8a	233	static void initialise_spaces(struct udevice *dev)
e76cb927 SG	234	{
	235	uint32_t zero = 0;
	236	uint32_t perm = TPM_NV_PER_WRITE_STCLEAR \| TPM_NV_PER_PPWRITE;
	237
	238	printf("\tInitialising spaces\n");
abdc7b8a SG	239	tpm_nv_set_locked(dev); /* useful only the first time */
	240	tpm_nv_define_space(dev, INDEX0, perm, 4);
	241	tpm_nv_write_value(dev, INDEX0, (uint8_t *)&zero, 4);
	242	tpm_nv_define_space(dev, INDEX1, perm, 4);
	243	tpm_nv_write_value(dev, INDEX1, (uint8_t *)&zero, 4);
	244	tpm_nv_define_space(dev, INDEX2, perm, 4);
	245	tpm_nv_write_value(dev, INDEX2, (uint8_t *)&zero, 4);
	246	tpm_nv_define_space(dev, INDEX3, perm, 4);
	247	tpm_nv_write_value(dev, INDEX3, (uint8_t *)&zero, 4);
e76cb927 SG	248	perm = TPM_NV_PER_READ_STCLEAR \| TPM_NV_PER_WRITE_STCLEAR \|
e76cb927 SG	249	TPM_NV_PER_PPWRITE;
abdc7b8a	250	tpm_nv_define_space(dev, INDEX_INITIALISED, perm, 1);
e76cb927 SG	251	}
e76cb927 SG	252
abdc7b8a	253	static int test_readonly(struct udevice *dev)
e76cb927 SG	254	{
	255	uint8_t c;
	256	uint32_t index_0, index_1, index_2, index_3;
	257	int read0, read1, read2, read3;
	258
	259	printf("Testing readonly ...\n");
abdc7b8a SG	260	tpm_init(dev);
	261	tpm_startup(dev, TPM_ST_CLEAR);
	262	tpm_self_test_full(dev);
	263	tpm_tsc_physical_presence(dev, PRESENCE);
e76cb927 SG	264	/*
	265	* Checks if initialisation has completed by trying to read-lock a
	266	* space that's created at the end of initialisation
	267	*/
abdc7b8a	268	if (tpm_nv_read_value(dev, INDEX_INITIALISED, &c, 0) == TPM_BADINDEX) {
e76cb927	269	/* The initialisation did not complete */
abdc7b8a	270	initialise_spaces(dev);
e76cb927 SG	271	}
	272
	273	/* Checks if spaces are OK or messed up */
abdc7b8a SG	274	read0 = tpm_nv_read_value(dev, INDEX0, (uint8_t *)&index_0,
	275	sizeof(index_0));
	276	read1 = tpm_nv_read_value(dev, INDEX1, (uint8_t *)&index_1,
	277	sizeof(index_1));
	278	read2 = tpm_nv_read_value(dev, INDEX2, (uint8_t *)&index_2,
	279	sizeof(index_2));
	280	read3 = tpm_nv_read_value(dev, INDEX3, (uint8_t *)&index_3,
	281	sizeof(index_3));
e76cb927 SG	282	if (read0 \|\| read1 \|\| read2 \|\| read3) {
	283	printf("Invalid contents\n");
	284	return 0;
	285	}
	286
	287	/*
	288	* Writes space, and locks it. Then attempts to write again.
	289	* I really wish I could use the imperative.
	290	*/
	291	index_0 += 1;
abdc7b8a SG	292	if (tpm_nv_write_value(dev, INDEX0, (uint8_t *)&index_0,
abdc7b8a SG	293	sizeof(index_0) !=
e76cb927	294	TPM_SUCCESS)) {
9b643e31	295	pr_err("\tcould not write index 0\n");
e76cb927	296	}
abdc7b8a SG	297	tpm_nv_write_value_lock(dev, INDEX0);
	298	if (tpm_nv_write_value(dev, INDEX0, (uint8_t *)&index_0,
	299	sizeof(index_0)) ==
e76cb927	300	TPM_SUCCESS)
9b643e31	301	pr_err("\tindex 0 is not locked\n");
e76cb927 SG	302
	303	printf("\tdone\n");
	304	return 0;
	305	}
	306
abdc7b8a	307	static int test_redefine_unowned(struct udevice *dev)
e76cb927 SG	308	{
	309	uint32_t perm;
	310	uint32_t result;
	311	uint32_t x;
	312
	313	printf("Testing redefine_unowned ...");
abdc7b8a SG	314	tpm_init(dev);
	315	TPM_CHECK(TlclStartupIfNeeded(dev));
	316	TPM_CHECK(tpm_self_test_full(dev));
	317	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	318	assert(!tpm_is_owned(dev));
e76cb927 SG	319
e76cb927 SG	320	/* Ensures spaces exist. */
abdc7b8a SG	321	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
abdc7b8a SG	322	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
e76cb927 SG	323
	324	/* Redefines spaces a couple of times. */
	325	perm = TPM_NV_PER_PPWRITE \| TPM_NV_PER_GLOBALLOCK;
abdc7b8a SG	326	TPM_CHECK(tpm_nv_define_space(dev, INDEX0, perm, 2 * sizeof(uint32_t)));
abdc7b8a SG	327	TPM_CHECK(tpm_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t)));
e76cb927	328	perm = TPM_NV_PER_PPWRITE;
abdc7b8a SG	329	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, 2 * sizeof(uint32_t)));
abdc7b8a SG	330	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t)));
e76cb927 SG	331
e76cb927 SG	332	/* Sets the global lock */
abdc7b8a	333	tpm_set_global_lock(dev);
e76cb927 SG	334
e76cb927 SG	335	/* Verifies that index0 cannot be redefined */
abdc7b8a	336	result = tpm_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t));
e76cb927 SG	337	assert(result == TPM_AREA_LOCKED);
	338
	339	/* Checks that index1 can */
abdc7b8a SG	340	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, 2 * sizeof(uint32_t)));
abdc7b8a SG	341	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t)));
e76cb927 SG	342
e76cb927 SG	343	/* Turns off PP */
abdc7b8a	344	tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
e76cb927 SG	345
e76cb927 SG	346	/* Verifies that neither index0 nor index1 can be redefined */
abdc7b8a	347	result = tpm_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t));
e76cb927	348	assert(result == TPM_BAD_PRESENCE);
abdc7b8a	349	result = tpm_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t));
e76cb927 SG	350	assert(result == TPM_BAD_PRESENCE);
	351
	352	printf("done\n");
	353	return 0;
	354	}
	355
	356	#define PERMPPGL (TPM_NV_PER_PPWRITE \| TPM_NV_PER_GLOBALLOCK)
	357	#define PERMPP TPM_NV_PER_PPWRITE
	358
abdc7b8a	359	static int test_space_perm(struct udevice *dev)
e76cb927 SG	360	{
	361	uint32_t perm;
	362
	363	printf("Testing spaceperm ...");
abdc7b8a SG	364	tpm_init(dev);
	365	TPM_CHECK(TlclStartupIfNeeded(dev));
	366	TPM_CHECK(tpm_continue_self_test(dev));
	367	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	368	TPM_CHECK(tpm_get_permissions(dev, INDEX0, &perm));
e76cb927	369	assert((perm & PERMPPGL) == PERMPPGL);
abdc7b8a	370	TPM_CHECK(tpm_get_permissions(dev, INDEX1, &perm));
e76cb927 SG	371	assert((perm & PERMPP) == PERMPP);
	372	printf("done\n");
	373	return 0;
	374	}
	375
abdc7b8a	376	static int test_startup(struct udevice *dev)
e76cb927 SG	377	{
e76cb927 SG	378	uint32_t result;
abdc7b8a	379
e76cb927 SG	380	printf("Testing startup ...\n");
e76cb927 SG	381
abdc7b8a SG	382	tpm_init(dev);
abdc7b8a SG	383	result = tpm_startup(dev, TPM_ST_CLEAR);
e76cb927 SG	384	if (result != 0 && result != TPM_INVALID_POSTINIT)
e76cb927 SG	385	printf("\ttpm startup failed with 0x%x\n", result);
abdc7b8a	386	result = tpm_get_flags(dev, NULL, NULL, NULL);
e76cb927 SG	387	if (result != 0)
	388	printf("\ttpm getflags failed with 0x%x\n", result);
	389	printf("\texecuting SelfTestFull\n");
abdc7b8a SG	390	tpm_self_test_full(dev);
abdc7b8a SG	391	result = tpm_get_flags(dev, NULL, NULL, NULL);
e76cb927 SG	392	if (result != 0)
	393	printf("\ttpm getflags failed with 0x%x\n", result);
	394	printf("\tdone\n");
	395	return 0;
	396	}
	397
	398	/*
	399	* Runs [op] and ensures it returns success and doesn't run longer than
	400	* [time_limit] in milliseconds.
	401	*/
	402	#define TTPM_CHECK(op, time_limit) do { \
	403	ulong start, time; \
	404	uint32_t __result; \
	405	\
	406	start = get_timer(0); \
	407	__result = op; \
	408	if (__result != TPM_SUCCESS) { \
	409	printf("\t" #op ": error 0x%x\n", __result); \
	410	return -1; \
	411	} \
	412	time = get_timer(start); \
	413	printf("\t" #op ": %lu ms\n", time); \
	414	if (time > (ulong)time_limit) { \
	415	printf("\t" #op " exceeded " #time_limit " ms\n"); \
	416	} \
	417	} while (0)
	418
	419
abdc7b8a	420	static int test_timing(struct udevice *dev)
e76cb927	421	{
e76cb927	422	uint8_t in[20], out[20];
abdc7b8a	423	uint32_t x;
e76cb927 SG	424
e76cb927 SG	425	printf("Testing timing ...");
abdc7b8a SG	426	tpm_init(dev);
	427	TTPM_CHECK(TlclStartupIfNeeded(dev), 50);
	428	TTPM_CHECK(tpm_continue_self_test(dev), 100);
	429	TTPM_CHECK(tpm_self_test_full(dev), 1000);
	430	TTPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE), 100);
	431	TTPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)),
	432	100);
	433	TTPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)),
	434	100);
	435	TTPM_CHECK(tpm_extend(dev, 0, in, out), 200);
	436	TTPM_CHECK(tpm_set_global_lock(dev), 50);
	437	TTPM_CHECK(tpm_tsc_physical_presence(dev, PHYS_PRESENCE), 100);
e76cb927 SG	438	printf("done\n");
	439	return 0;
	440	}
	441
	442	#define TPM_MAX_NV_WRITES_NOOWNER 64
	443
abdc7b8a	444	static int test_write_limit(struct udevice *dev)
e76cb927	445	{
e76cb927	446	uint32_t result;
abdc7b8a	447	int i;
e76cb927	448
abdc7b8a SG	449	printf("Testing writelimit ...\n");
	450	tpm_init(dev);
	451	TPM_CHECK(TlclStartupIfNeeded(dev));
	452	TPM_CHECK(tpm_self_test_full(dev));
	453	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
	454	TPM_CHECK(tpm_force_clear(dev));
	455	TPM_CHECK(tpm_physical_enable(dev));
	456	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
e76cb927 SG	457
	458	for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
	459	printf("\twriting %d\n", i);
abdc7b8a SG	460	result = tpm_nv_write_value(dev, INDEX0, (uint8_t *)&i,
abdc7b8a SG	461	sizeof(i));
e76cb927 SG	462	switch (result) {
	463	case TPM_SUCCESS:
	464	break;
	465	case TPM_MAXNVWRITES:
	466	assert(i >= TPM_MAX_NV_WRITES_NOOWNER);
	467	default:
9b643e31	468	pr_err("\tunexpected error code %d (0x%x)\n",
e76cb927 SG	469	result, result);
	470	}
	471	}
	472
	473	/* Reset write count */
abdc7b8a SG	474	TPM_CHECK(tpm_force_clear(dev));
	475	TPM_CHECK(tpm_physical_enable(dev));
	476	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
e76cb927 SG	477
e76cb927 SG	478	/* Try writing again. */
abdc7b8a	479	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&i, sizeof(i)));
e76cb927 SG	480	printf("\tdone\n");
	481	return 0;
	482	}
	483
	484	#define VOIDTEST(XFUNC) \
	485	int do_test_##XFUNC(cmd_tbl_t *cmd_tbl, int flag, int argc, \
	486	char * const argv[]) \
	487	{ \
abdc7b8a SG	488	struct udevice *dev; \
	489	int ret; \
	490	\
	491	ret = get_tpm(&dev); \
	492	if (ret) \
	493	return ret; \
	494	return test_##XFUNC(dev); \
e76cb927 SG	495	}
	496
	497	#define VOIDENT(XNAME) \
	498	U_BOOT_CMD_MKENT(XNAME, 0, 1, do_test_##XNAME, "", ""),
	499
	500	VOIDTEST(early_extend)
	501	VOIDTEST(early_nvram)
	502	VOIDTEST(early_nvram2)
	503	VOIDTEST(enable)
	504	VOIDTEST(fast_enable)
	505	VOIDTEST(global_lock)
	506	VOIDTEST(lock)
	507	VOIDTEST(readonly)
	508	VOIDTEST(redefine_unowned)
	509	VOIDTEST(space_perm)
	510	VOIDTEST(startup)
	511	VOIDTEST(timing)
	512	VOIDTEST(write_limit)
	513	VOIDTEST(timer)
	514
	515	static cmd_tbl_t cmd_cros_tpm_sub[] = {
	516	VOIDENT(early_extend)
	517	VOIDENT(early_nvram)
	518	VOIDENT(early_nvram2)
	519	VOIDENT(enable)
	520	VOIDENT(fast_enable)
	521	VOIDENT(global_lock)
	522	VOIDENT(lock)
	523	VOIDENT(readonly)
	524	VOIDENT(redefine_unowned)
	525	VOIDENT(space_perm)
	526	VOIDENT(startup)
	527	VOIDENT(timing)
	528	VOIDENT(write_limit)
	529	VOIDENT(timer)
	530	};
	531
	532	static int do_tpmtest(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	533	{
	534	cmd_tbl_t *c;
0427b9c5	535	int i;
e76cb927 SG	536
e76cb927 SG	537	printf("argc = %d, argv = ", argc);
e76cb927	538
0427b9c5 SB	539	for (i = 0; i < argc; i++)
	540	printf(" %s", argv[i]);
	541
	542	printf("\n------\n");
	543
e76cb927 SG	544	argc--;
	545	argv++;
	546	c = find_cmd_tbl(argv[0], cmd_cros_tpm_sub,
	547	ARRAY_SIZE(cmd_cros_tpm_sub));
	548	return c ? c->cmd(cmdtp, flag, argc, argv) : cmd_usage(cmdtp);
	549	}
	550
	551	U_BOOT_CMD(tpmtest, 2, 1, do_tpmtest, "TPM tests",
	552	"\n\tearly_extend\n"
	553	"\tearly_nvram\n"
	554	"\tearly_nvram2\n"
	555	"\tenable\n"
	556	"\tfast_enable\n"
	557	"\tglobal_lock\n"
	558	"\tlock\n"
	559	"\treadonly\n"
	560	"\tredefine_unowned\n"
	561	"\tspace_perm\n"
	562	"\tstartup\n"
	563	"\ttiming\n"
	564	"\twrite_limit\n");