tpm: prepare support for TPMv2.x commands

Choice between v1 and v2 compliant functions is done with the
configuration.

Create the various files that will receive TPMv2-only code on the same
scheme as for the TPMv1 code.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

cmd/Makefile

@@ -123,6 +123,7 @@ obj-$(CONFIG_HUSH_PARSER) += test.o
 obj-$(CONFIG_CMD_TPM) += tpm-common.o
 obj-$(CONFIG_CMD_TPM_V1) += tpm-v1.o
 obj-$(CONFIG_CMD_TPM_TEST) += tpm_test.o
+obj-$(CONFIG_CMD_TPM_V2) += tpm-v2.o
 obj-$(CONFIG_CMD_CROS_EC) += cros_ec.o
 obj-$(CONFIG_CMD_TSI148) += tsi148.o
 obj-$(CONFIG_CMD_UBI) += ubi.o

cmd/tpm-v2.c

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Bootlin
+ * Author: Miquel Raynal <miquel.raynal@bootlin.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <tpm-common.h>
+#include <tpm-v2.h>
+#include "tpm-user-utils.h"
+
+static cmd_tbl_t tpm2_commands[] = {
+	U_BOOT_CMD_MKENT(info, 0, 1, do_tpm_info, "", ""),
+	U_BOOT_CMD_MKENT(init, 0, 1, do_tpm_init, "", ""),
+};
+
+cmd_tbl_t *get_tpm_commands(unsigned int *size)
+{
+	*size = ARRAY_SIZE(tpm2_commands);
+
+	return tpm2_commands;
+}
+
+U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm, "Issue a TPMv2.x command",
+"<command> [<arguments>]\n"
+"\n"
+"info\n"
+"    Show information about the TPM.\n"
+"init\n"
+"    Initialize the software stack. Always the first command to issue.\n"
+);

drivers/tpm/tpm-uclass.c

@@ -9,6 +9,8 @@
 #include <linux/unaligned/be_byteshift.h>
 #if defined(CONFIG_TPM_V1)
 #include <tpm-v1.h>
+#elif defined(CONFIG_TPM_V2)
+#include <tpm-v2.h>
 #endif
 #include "tpm_internal.h"
 

include/tpm-common.h

@@ -35,11 +35,17 @@ enum tpm_duration {
  *
  * @duration_ms:	Length of each duration type in milliseconds
  * @retry_time_ms:	Time to wait before retrying receive
+ * @pcr_count:		Number of PCR per bank
+ * @pcr_select_min:	Minimum size in bytes of the pcrSelect array
  * @buf:		Buffer used during the exchanges with the chip
  */
 struct tpm_chip_priv {
 	uint duration_ms[TPM_DURATION_COUNT];
 	uint retry_time_ms;
+#if defined(CONFIG_TPM_V2)
+	uint pcr_count;
+	uint pcr_select_min;
+#endif
 	u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)];  /* Max buffer size + addr */
 };
 

include/tpm-v2.h

@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2018 Bootlin
+ * Author: Miquel Raynal <miquel.raynal@bootlin.com>
+ */
+
+#ifndef __TPM_V2_H
+#define __TPM_V2_H
+
+#include <tpm-common.h>
+
+#define TPM2_DIGEST_LEN		32
+
+/**
+ * TPM2 Structure Tags for command/response buffers.
+ *
+ * @TPM2_ST_NO_SESSIONS: the command does not need an authentication.
+ * @TPM2_ST_SESSIONS: the command needs an authentication.
+ */
+enum tpm2_structures {
+	TPM2_ST_NO_SESSIONS	= 0x8001,
+	TPM2_ST_SESSIONS	= 0x8002,
+};
+
+/**
+ * TPM2 type of boolean.
+ */
+enum tpm2_yes_no {
+	TPMI_YES		= 1,
+	TPMI_NO			= 0,
+};
+
+/**
+ * TPM2 startup values.
+ *
+ * @TPM2_SU_CLEAR: reset the internal state.
+ * @TPM2_SU_STATE: restore saved state (if any).
+ */
+enum tpm2_startup_types {
+	TPM2_SU_CLEAR		= 0x0000,
+	TPM2_SU_STATE		= 0x0001,
+};
+
+/**
+ * TPM2 permanent handles.
+ *
+ * @TPM2_RH_OWNER: refers to the 'owner' hierarchy.
+ * @TPM2_RS_PW: indicates a password.
+ * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy.
+ * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy.
+ * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy.
+ */
+enum tpm2_handles {
+	TPM2_RH_OWNER		= 0x40000001,
+	TPM2_RS_PW		= 0x40000009,
+	TPM2_RH_LOCKOUT		= 0x4000000A,
+	TPM2_RH_ENDORSEMENT	= 0x4000000B,
+	TPM2_RH_PLATFORM	= 0x4000000C,
+};
+
+/**
+ * TPM2 command codes used at the beginning of a buffer, gives the command.
+ *
+ * @TPM2_CC_STARTUP: TPM2_Startup().
+ * @TPM2_CC_SELF_TEST: TPM2_SelfTest().
+ * @TPM2_CC_CLEAR: TPM2_Clear().
+ * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl().
+ * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth().
+ * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy().
+ * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
+ * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
+ * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
+ * @TPM2_CC_PCR_READ: TPM2_PCR_Read().
+ * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
+ * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
+ */
+enum tpm2_command_codes {
+	TPM2_CC_STARTUP		= 0x0144,
+	TPM2_CC_SELF_TEST	= 0x0143,
+	TPM2_CC_CLEAR		= 0x0126,
+	TPM2_CC_CLEARCONTROL	= 0x0127,
+	TPM2_CC_HIERCHANGEAUTH	= 0x0129,
+	TPM2_CC_DAM_RESET	= 0x0139,
+	TPM2_CC_DAM_PARAMETERS	= 0x013A,
+	TPM2_CC_GET_CAPABILITY	= 0x017A,
+	TPM2_CC_PCR_READ	= 0x017E,
+	TPM2_CC_PCR_EXTEND	= 0x0182,
+};
+
+/**
+ * TPM2 return codes.
+ */
+enum tpm2_return_codes {
+	TPM2_RC_SUCCESS		= 0x0000,
+	TPM2_RC_BAD_TAG		= 0x001E,
+	TPM2_RC_FMT1		= 0x0080,
+	TPM2_RC_HASH		= TPM2_RC_FMT1 + 0x0003,
+	TPM2_RC_VALUE		= TPM2_RC_FMT1 + 0x0004,
+	TPM2_RC_SIZE		= TPM2_RC_FMT1 + 0x0015,
+	TPM2_RC_BAD_AUTH	= TPM2_RC_FMT1 + 0x0022,
+	TPM2_RC_HANDLE		= TPM2_RC_FMT1 + 0x000B,
+	TPM2_RC_VER1		= 0x0100,
+	TPM2_RC_INITIALIZE	= TPM2_RC_VER1 + 0x0000,
+	TPM2_RC_FAILURE		= TPM2_RC_VER1 + 0x0001,
+	TPM2_RC_DISABLED	= TPM2_RC_VER1 + 0x0020,
+	TPM2_RC_AUTH_MISSING	= TPM2_RC_VER1 + 0x0025,
+	TPM2_RC_COMMAND_CODE	= TPM2_RC_VER1 + 0x0043,
+	TPM2_RC_AUTHSIZE	= TPM2_RC_VER1 + 0x0044,
+	TPM2_RC_AUTH_CONTEXT	= TPM2_RC_VER1 + 0x0045,
+	TPM2_RC_NEEDS_TEST	= TPM2_RC_VER1 + 0x0053,
+	TPM2_RC_WARN		= 0x0900,
+	TPM2_RC_TESTING		= TPM2_RC_WARN + 0x000A,
+	TPM2_RC_REFERENCE_H0	= TPM2_RC_WARN + 0x0010,
+	TPM2_RC_LOCKOUT		= TPM2_RC_WARN + 0x0021,
+};
+
+/**
+ * TPM2 algorithms.
+ */
+enum tpm2_algorithms {
+	TPM2_ALG_XOR		= 0x0A,
+	TPM2_ALG_SHA256		= 0x0B,
+	TPM2_ALG_SHA384		= 0x0C,
+	TPM2_ALG_SHA512		= 0x0D,
+	TPM2_ALG_NULL		= 0x10,
+};
+
+#endif /* __TPM_V2_H */

lib/Makefile

@@ -41,6 +41,7 @@ obj-y += rc4.o
 obj-$(CONFIG_SUPPORT_EMMC_RPMB) += sha256.o
 obj-$(CONFIG_TPM) += tpm-common.o
 obj-$(CONFIG_TPM_V1) += tpm-v1.o
+obj-$(CONFIG_TPM_V2) += tpm-v2.o
 obj-$(CONFIG_RBTREE)	+= rbtree.o
 obj-$(CONFIG_BITREVERSE) += bitrev.o
 obj-y += list_sort.o

lib/tpm-v2.c

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Bootlin
+ * Author: Miquel Raynal <miquel.raynal@bootlin.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <tpm-common.h>
+#include <tpm-v2.h>
+#include "tpm-utils.h"