diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 526d65d..df9b9fe 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5392,6 +5392,18 @@
 			See Documentation/admin-guide/mm/transhuge.rst
 			for more details.
 
+	trusted.source=	[KEYS]
+			Format: <string>
+			This parameter identifies the trust source as a backend
+			for trusted keys implementation. Supported trust
+			sources:
+			- "tpm"
+			- "tee"
+			If not specified then it defaults to iterating through
+			the trust source list starting with TPM and assigns the
+			first trust source as a backend which is initialized
+			successfully during iteration.
+
 	tsc=		Disable clocksource stability checks for TSC.
 			Format: <string>
 			[x86] reliable: mark tsc clocksource as reliable, this
diff --git a/include/keys/trusted-type.h b/include/keys/trusted-type.h
index a94c03a..a566451 100644
--- a/include/keys/trusted-type.h
+++ b/include/keys/trusted-type.h
@@ -40,6 +40,53 @@ struct trusted_key_options {
 	uint32_t policyhandle;
 };
 
+struct trusted_key_ops {
+	/*
+	 * flag to indicate if trusted key implementation supports migration
+	 * or not.
+	 */
+	unsigned char migratable;
+
+	/* Initialize key interface. */
+	int (*init)(void);
+
+	/* Seal a key. */
+	int (*seal)(struct trusted_key_payload *p, char *datablob);
+
+	/* Unseal a key. */
+	int (*unseal)(struct trusted_key_payload *p, char *datablob);
+
+	/* Get a randomized key. */
+	int (*get_random)(unsigned char *key, size_t key_len);
+
+	/* Exit key interface. */
+	void (*exit)(void);
+};
+
+struct trusted_key_source {
+	char *name;
+	struct trusted_key_ops *ops;
+};
+
 extern struct key_type key_type_trusted;
 
+#define TRUSTED_DEBUG 0
+
+#if TRUSTED_DEBUG
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+	pr_info("trusted_key: key_len %d\n", p->key_len);
+	print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE,
+		       16, 1, p->key, p->key_len, 0);
+	pr_info("trusted_key: bloblen %d\n", p->blob_len);
+	print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE,
+		       16, 1, p->blob, p->blob_len, 0);
+	pr_info("trusted_key: migratable %d\n", p->migratable);
+}
+#else
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+}
+#endif
+
 #endif /* _KEYS_TRUSTED_TYPE_H */
diff --git a/include/keys/trusted_tpm.h b/include/keys/trusted_tpm.h
index a56d8e1..fb3280a 100644
--- a/include/keys/trusted_tpm.h
+++ b/include/keys/trusted_tpm.h
@@ -16,6 +16,8 @@
 #define LOAD32N(buffer, offset)	(*(uint32_t *)&buffer[offset])
 #define LOAD16(buffer, offset)	(ntohs(*(uint16_t *)&buffer[offset]))
 
+extern struct trusted_key_ops tpm_trusted_key_ops;
+
 struct osapsess {
 	uint32_t handle;
 	unsigned char secret[SHA1_DIGEST_SIZE];
@@ -60,17 +62,6 @@ static inline void dump_options(struct trusted_key_options *o)
 		       16, 1, o->pcrinfo, o->pcrinfo_len, 0);
 }
 
-static inline void dump_payload(struct trusted_key_payload *p)
-{
-	pr_info("trusted_key: key_len %d\n", p->key_len);
-	print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE,
-		       16, 1, p->key, p->key_len, 0);
-	pr_info("trusted_key: bloblen %d\n", p->blob_len);
-	print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE,
-		       16, 1, p->blob, p->blob_len, 0);
-	pr_info("trusted_key: migratable %d\n", p->migratable);
-}
-
 static inline void dump_sess(struct osapsess *s)
 {
 	print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
@@ -96,10 +87,6 @@ static inline void dump_options(struct trusted_key_options *o)
 {
 }
 
-static inline void dump_payload(struct trusted_key_payload *p)
-{
-}
-
 static inline void dump_sess(struct osapsess *s)
 {
 }
diff --git a/security/keys/trusted-keys/Makefile b/security/keys/trusted-keys/Makefile
index 7b73ceb..49e3bcf 100644
--- a/security/keys/trusted-keys/Makefile
+++ b/security/keys/trusted-keys/Makefile
@@ -4,5 +4,6 @@
 #
 
 obj-$(CONFIG_TRUSTED_KEYS) += trusted.o
+trusted-y += trusted_core.o
 trusted-y += trusted_tpm1.o
 trusted-y += trusted_tpm2.o
diff --git a/security/keys/trusted-keys/trusted_core.c b/security/keys/trusted-keys/trusted_core.c
new file mode 100644
index 0000000..aa4f2a0
--- /dev/null
+++ b/security/keys/trusted-keys/trusted_core.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2010 IBM Corporation
+ * Copyright (c) 2019-2020, Linaro Limited
+ *
+ * See Documentation/security/keys/trusted-encrypted.rst
+ */
+
+#include <keys/user-type.h>
+#include <keys/trusted-type.h>
+#include <keys/trusted_tpm.h>
+#include <linux/capability.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/key-type.h>
+#include <linux/module.h>
+#include <linux/parser.h>
+#include <linux/rcupdate.h>
+#include <linux/slab.h>
+#include <linux/static_call.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+
+static char *trusted_key_source;
+module_param_named(source, trusted_key_source, charp, 0);
+MODULE_PARM_DESC(source, "Select trusted keys source (tpm or tee)");
+
+static const struct trusted_key_source trusted_key_sources[] = {
+#if defined(CONFIG_TCG_TPM)
+	{ "tpm", &tpm_trusted_key_ops },
+#endif
+};
+
+DEFINE_STATIC_CALL_NULL(trusted_key_init, *trusted_key_sources[0].ops->init);
+DEFINE_STATIC_CALL_NULL(trusted_key_seal, *trusted_key_sources[0].ops->seal);
+DEFINE_STATIC_CALL_NULL(trusted_key_unseal,
+			*trusted_key_sources[0].ops->unseal);
+DEFINE_STATIC_CALL_NULL(trusted_key_get_random,
+			*trusted_key_sources[0].ops->get_random);
+DEFINE_STATIC_CALL_NULL(trusted_key_exit, *trusted_key_sources[0].ops->exit);
+static unsigned char migratable;
+
+enum {
+	Opt_err,
+	Opt_new, Opt_load, Opt_update,
+};
+
+static const match_table_t key_tokens = {
+	{Opt_new, "new"},
+	{Opt_load, "load"},
+	{Opt_update, "update"},
+	{Opt_err, NULL}
+};
+
+/*
+ * datablob_parse - parse the keyctl data and fill in the
+ *                  payload structure
+ *
+ * On success returns 0, otherwise -EINVAL.
+ */
+static int datablob_parse(char *datablob, struct trusted_key_payload *p)
+{
+	substring_t args[MAX_OPT_ARGS];
+	long keylen;
+	int ret = -EINVAL;
+	int key_cmd;
+	char *c;
+
+	/* main command */
+	c = strsep(&datablob, " \t");
+	if (!c)
+		return -EINVAL;
+	key_cmd = match_token(c, key_tokens, args);
+	switch (key_cmd) {
+	case Opt_new:
+		/* first argument is key size */
+		c = strsep(&datablob, " \t");
+		if (!c)
+			return -EINVAL;
+		ret = kstrtol(c, 10, &keylen);
+		if (ret < 0 || keylen < MIN_KEY_SIZE || keylen > MAX_KEY_SIZE)
+			return -EINVAL;
+		p->key_len = keylen;
+		ret = Opt_new;
+		break;
+	case Opt_load:
+		/* first argument is sealed blob */
+		c = strsep(&datablob, " \t");
+		if (!c)
+			return -EINVAL;
+		p->blob_len = strlen(c) / 2;
+		if (p->blob_len > MAX_BLOB_SIZE)
+			return -EINVAL;
+		ret = hex2bin(p->blob, c, p->blob_len);
+		if (ret < 0)
+			return -EINVAL;
+		ret = Opt_load;
+		break;
+	case Opt_update:
+		ret = Opt_update;
+		break;
+	case Opt_err:
+		return -EINVAL;
+	}
+	return ret;
+}
+
+static struct trusted_key_payload *trusted_payload_alloc(struct key *key)
+{
+	struct trusted_key_payload *p = NULL;
+	int ret;
+
+	ret = key_payload_reserve(key, sizeof(*p));
+	if (ret < 0)
+		return p;
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+
+	p->migratable = migratable;
+
+	return p;
+}
+
+/*
+ * trusted_instantiate - create a new trusted key
+ *
+ * Unseal an existing trusted blob or, for a new key, get a
+ * random key, then seal and create a trusted key-type key,
+ * adding it to the specified keyring.
+ *
+ * On success, return 0. Otherwise return errno.
+ */
+static int trusted_instantiate(struct key *key,
+			       struct key_preparsed_payload *prep)
+{
+	struct trusted_key_payload *payload = NULL;
+	size_t datalen = prep->datalen;
+	char *datablob;
+	int ret = 0;
+	int key_cmd;
+	size_t key_len;
+
+	if (datalen <= 0 || datalen > 32767 || !prep->data)
+		return -EINVAL;
+
+	datablob = kmalloc(datalen + 1, GFP_KERNEL);
+	if (!datablob)
+		return -ENOMEM;
+	memcpy(datablob, prep->data, datalen);
+	datablob[datalen] = '\0';
+
+	payload = trusted_payload_alloc(key);
+	if (!payload) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	key_cmd = datablob_parse(datablob, payload);
+	if (key_cmd < 0) {
+		ret = key_cmd;
+		goto out;
+	}
+
+	dump_payload(payload);
+
+	switch (key_cmd) {
+	case Opt_load:
+		ret = static_call(trusted_key_unseal)(payload, datablob);
+		dump_payload(payload);
+		if (ret < 0)
+			pr_info("trusted_key: key_unseal failed (%d)\n", ret);
+		break;
+	case Opt_new:
+		key_len = payload->key_len;
+		ret = static_call(trusted_key_get_random)(payload->key,
+							  key_len);
+		if (ret != key_len) {
+			pr_info("trusted_key: key_create failed (%d)\n", ret);
+			goto out;
+		}
+
+		ret = static_call(trusted_key_seal)(payload, datablob);
+		if (ret < 0)
+			pr_info("trusted_key: key_seal failed (%d)\n", ret);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+out:
+	kfree_sensitive(datablob);
+	if (!ret)
+		rcu_assign_keypointer(key, payload);
+	else
+		kfree_sensitive(payload);
+	return ret;
+}
+
+static void trusted_rcu_free(struct rcu_head *rcu)
+{
+	struct trusted_key_payload *p;
+
+	p = container_of(rcu, struct trusted_key_payload, rcu);
+	kfree_sensitive(p);
+}
+
+/*
+ * trusted_update - reseal an existing key with new PCR values
+ */
+static int trusted_update(struct key *key, struct key_preparsed_payload *prep)
+{
+	struct trusted_key_payload *p;
+	struct trusted_key_payload *new_p;
+	size_t datalen = prep->datalen;
+	char *datablob;
+	int ret = 0;
+
+	if (key_is_negative(key))
+		return -ENOKEY;
+	p = key->payload.data[0];
+	if (!p->migratable)
+		return -EPERM;
+	if (datalen <= 0 || datalen > 32767 || !prep->data)
+		return -EINVAL;
+
+	datablob = kmalloc(datalen + 1, GFP_KERNEL);
+	if (!datablob)
+		return -ENOMEM;
+
+	new_p = trusted_payload_alloc(key);
+	if (!new_p) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	memcpy(datablob, prep->data, datalen);
+	datablob[datalen] = '\0';
+	ret = datablob_parse(datablob, new_p);
+	if (ret != Opt_update) {
+		ret = -EINVAL;
+		kfree_sensitive(new_p);
+		goto out;
+	}
+
+	/* copy old key values, and reseal with new pcrs */
+	new_p->migratable = p->migratable;
+	new_p->key_len = p->key_len;
+	memcpy(new_p->key, p->key, p->key_len);
+	dump_payload(p);
+	dump_payload(new_p);
+
+	ret = static_call(trusted_key_seal)(new_p, datablob);
+	if (ret < 0) {
+		pr_info("trusted_key: key_seal failed (%d)\n", ret);
+		kfree_sensitive(new_p);
+		goto out;
+	}
+
+	rcu_assign_keypointer(key, new_p);
+	call_rcu(&p->rcu, trusted_rcu_free);
+out:
+	kfree_sensitive(datablob);
+	return ret;
+}
+
+/*
+ * trusted_read - copy the sealed blob data to userspace in hex.
+ * On success, return to userspace the trusted key datablob size.
+ */
+static long trusted_read(const struct key *key, char *buffer,
+			 size_t buflen)
+{
+	const struct trusted_key_payload *p;
+	char *bufp;
+	int i;
+
+	p = dereference_key_locked(key);
+	if (!p)
+		return -EINVAL;
+
+	if (buffer && buflen >= 2 * p->blob_len) {
+		bufp = buffer;
+		for (i = 0; i < p->blob_len; i++)
+			bufp = hex_byte_pack(bufp, p->blob[i]);
+	}
+	return 2 * p->blob_len;
+}
+
+/*
+ * trusted_destroy - clear and free the key's payload
+ */
+static void trusted_destroy(struct key *key)
+{
+	kfree_sensitive(key->payload.data[0]);
+}
+
+struct key_type key_type_trusted = {
+	.name = "trusted",
+	.instantiate = trusted_instantiate,
+	.update = trusted_update,
+	.destroy = trusted_destroy,
+	.describe = user_describe,
+	.read = trusted_read,
+};
+EXPORT_SYMBOL_GPL(key_type_trusted);
+
+static int __init init_trusted(void)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < ARRAY_SIZE(trusted_key_sources); i++) {
+		if (trusted_key_source &&
+		    strncmp(trusted_key_source, trusted_key_sources[i].name,
+			    strlen(trusted_key_sources[i].name)))
+			continue;
+
+		static_call_update(trusted_key_init,
+				   trusted_key_sources[i].ops->init);
+		static_call_update(trusted_key_seal,
+				   trusted_key_sources[i].ops->seal);
+		static_call_update(trusted_key_unseal,
+				   trusted_key_sources[i].ops->unseal);
+		static_call_update(trusted_key_get_random,
+				   trusted_key_sources[i].ops->get_random);
+		static_call_update(trusted_key_exit,
+				   trusted_key_sources[i].ops->exit);
+		migratable = trusted_key_sources[i].ops->migratable;
+
+		ret = static_call(trusted_key_init)();
+		if (!ret)
+			break;
+	}
+
+	/*
+	 * encrypted_keys.ko depends on successful load of this module even if
+	 * trusted key implementation is not found.
+	 */
+	if (ret == -ENODEV)
+		return 0;
+
+	return ret;
+}
+
+static void __exit cleanup_trusted(void)
+{
+	static_call(trusted_key_exit)();
+}
+
+late_initcall(init_trusted);
+module_exit(cleanup_trusted);
+
+MODULE_LICENSE("GPL");
diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index b9fe02e..bd03914 100644
--- a/security/keys/trusted-keys/trusted_tpm1.c
+++ b/security/keys/trusted-keys/trusted_tpm1.c
@@ -1,29 +1,22 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2010 IBM Corporation
- *
- * Author:
- * David Safford <safford@us.ibm.com>
+ * Copyright (c) 2019-2020, Linaro Limited
  *
  * See Documentation/security/keys/trusted-encrypted.rst
  */
 
 #include <crypto/hash_info.h>
-#include <linux/uaccess.h>
-#include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/parser.h>
 #include <linux/string.h>
 #include <linux/err.h>
-#include <keys/user-type.h>
 #include <keys/trusted-type.h>
 #include <linux/key-type.h>
-#include <linux/rcupdate.h>
 #include <linux/crypto.h>
 #include <crypto/hash.h>
 #include <crypto/sha.h>
-#include <linux/capability.h>
 #include <linux/tpm.h>
 #include <linux/tpm_command.h>
 
@@ -703,7 +696,6 @@ static int key_unseal(struct trusted_key_payload *p,
 
 enum {
 	Opt_err,
-	Opt_new, Opt_load, Opt_update,
 	Opt_keyhandle, Opt_keyauth, Opt_blobauth,
 	Opt_pcrinfo, Opt_pcrlock, Opt_migratable,
 	Opt_hash,
@@ -712,9 +704,6 @@ enum {
 };
 
 static const match_table_t key_tokens = {
-	{Opt_new, "new"},
-	{Opt_load, "load"},
-	{Opt_update, "update"},
 	{Opt_keyhandle, "keyhandle=%s"},
 	{Opt_keyauth, "keyauth=%s"},
 	{Opt_blobauth, "blobauth=%s"},
@@ -841,71 +830,6 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
 	return 0;
 }
 
-/*
- * datablob_parse - parse the keyctl data and fill in the
- * 		    payload and options structures
- *
- * On success returns 0, otherwise -EINVAL.
- */
-static int datablob_parse(char *datablob, struct trusted_key_payload *p,
-			  struct trusted_key_options *o)
-{
-	substring_t args[MAX_OPT_ARGS];
-	long keylen;
-	int ret = -EINVAL;
-	int key_cmd;
-	char *c;
-
-	/* main command */
-	c = strsep(&datablob, " \t");
-	if (!c)
-		return -EINVAL;
-	key_cmd = match_token(c, key_tokens, args);
-	switch (key_cmd) {
-	case Opt_new:
-		/* first argument is key size */
-		c = strsep(&datablob, " \t");
-		if (!c)
-			return -EINVAL;
-		ret = kstrtol(c, 10, &keylen);
-		if (ret < 0 || keylen < MIN_KEY_SIZE || keylen > MAX_KEY_SIZE)
-			return -EINVAL;
-		p->key_len = keylen;
-		ret = getoptions(datablob, p, o);
-		if (ret < 0)
-			return ret;
-		ret = Opt_new;
-		break;
-	case Opt_load:
-		/* first argument is sealed blob */
-		c = strsep(&datablob, " \t");
-		if (!c)
-			return -EINVAL;
-		p->blob_len = strlen(c) / 2;
-		if (p->blob_len > MAX_BLOB_SIZE)
-			return -EINVAL;
-		ret = hex2bin(p->blob, c, p->blob_len);
-		if (ret < 0)
-			return -EINVAL;
-		ret = getoptions(datablob, p, o);
-		if (ret < 0)
-			return ret;
-		ret = Opt_load;
-		break;
-	case Opt_update:
-		/* all arguments are options */
-		ret = getoptions(datablob, p, o);
-		if (ret < 0)
-			return ret;
-		ret = Opt_update;
-		break;
-	case Opt_err:
-		return -EINVAL;
-		break;
-	}
-	return ret;
-}
-
 static struct trusted_key_options *trusted_options_alloc(void)
 {
 	struct trusted_key_options *options;
@@ -926,248 +850,99 @@ static struct trusted_key_options *trusted_options_alloc(void)
 	return options;
 }
 
-static struct trusted_key_payload *trusted_payload_alloc(struct key *key)
+static int trusted_tpm_seal(struct trusted_key_payload *p, char *datablob)
 {
-	struct trusted_key_payload *p = NULL;
-	int ret;
-
-	ret = key_payload_reserve(key, sizeof *p);
-	if (ret < 0)
-		return p;
-	p = kzalloc(sizeof *p, GFP_KERNEL);
-	if (p)
-		p->migratable = 1; /* migratable by default */
-	return p;
-}
-
-/*
- * trusted_instantiate - create a new trusted key
- *
- * Unseal an existing trusted blob or, for a new key, get a
- * random key, then seal and create a trusted key-type key,
- * adding it to the specified keyring.
- *
- * On success, return 0. Otherwise return errno.
- */
-static int trusted_instantiate(struct key *key,
-			       struct key_preparsed_payload *prep)
-{
-	struct trusted_key_payload *payload = NULL;
 	struct trusted_key_options *options = NULL;
-	size_t datalen = prep->datalen;
-	char *datablob;
 	int ret = 0;
-	int key_cmd;
-	size_t key_len;
 	int tpm2;
 
 	tpm2 = tpm_is_tpm2(chip);
 	if (tpm2 < 0)
 		return tpm2;
 
-	if (datalen <= 0 || datalen > 32767 || !prep->data)
-		return -EINVAL;
-
-	datablob = kmalloc(datalen + 1, GFP_KERNEL);
-	if (!datablob)
-		return -ENOMEM;
-	memcpy(datablob, prep->data, datalen);
-	datablob[datalen] = '\0';
-
 	options = trusted_options_alloc();
-	if (!options) {
-		ret = -ENOMEM;
-		goto out;
-	}
-	payload = trusted_payload_alloc(key);
-	if (!payload) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!options)
+		return -ENOMEM;
 
-	key_cmd = datablob_parse(datablob, payload, options);
-	if (key_cmd < 0) {
-		ret = key_cmd;
+	ret = getoptions(datablob, p, options);
+	if (ret < 0)
 		goto out;
-	}
+	dump_options(options);
 
 	if (!options->keyhandle) {
 		ret = -EINVAL;
 		goto out;
 	}
 
-	dump_payload(payload);
-	dump_options(options);
+	if (tpm2)
+		ret = tpm2_seal_trusted(chip, p, options);
+	else
+		ret = key_seal(p, options);
+	if (ret < 0) {
+		pr_info("tpm_trusted_key: key_seal failed (%d)\n", ret);
+		goto out;
+	}
 
-	switch (key_cmd) {
-	case Opt_load:
-		if (tpm2)
-			ret = tpm2_unseal_trusted(chip, payload, options);
-		else
-			ret = key_unseal(payload, options);
-		dump_payload(payload);
-		dump_options(options);
-		if (ret < 0)
-			pr_info("trusted_key: key_unseal failed (%d)\n", ret);
-		break;
-	case Opt_new:
-		key_len = payload->key_len;
-		ret = tpm_get_random(chip, payload->key, key_len);
-		if (ret != key_len) {
-			pr_info("trusted_key: key_create failed (%d)\n", ret);
+	if (options->pcrlock) {
+		ret = pcrlock(options->pcrlock);
+		if (ret < 0) {
+			pr_info("tpm_trusted_key: pcrlock failed (%d)\n", ret);
 			goto out;
 		}
-		if (tpm2)
-			ret = tpm2_seal_trusted(chip, payload, options);
-		else
-			ret = key_seal(payload, options);
-		if (ret < 0)
-			pr_info("trusted_key: key_seal failed (%d)\n", ret);
-		break;
-	default:
-		ret = -EINVAL;
-		goto out;
 	}
-	if (!ret && options->pcrlock)
-		ret = pcrlock(options->pcrlock);
 out:
-	kfree_sensitive(datablob);
 	kfree_sensitive(options);
-	if (!ret)
-		rcu_assign_keypointer(key, payload);
-	else
-		kfree_sensitive(payload);
 	return ret;
 }
 
-static void trusted_rcu_free(struct rcu_head *rcu)
-{
-	struct trusted_key_payload *p;
-
-	p = container_of(rcu, struct trusted_key_payload, rcu);
-	kfree_sensitive(p);
-}
-
-/*
- * trusted_update - reseal an existing key with new PCR values
- */
-static int trusted_update(struct key *key, struct key_preparsed_payload *prep)
+static int trusted_tpm_unseal(struct trusted_key_payload *p, char *datablob)
 {
-	struct trusted_key_payload *p;
-	struct trusted_key_payload *new_p;
-	struct trusted_key_options *new_o;
-	size_t datalen = prep->datalen;
-	char *datablob;
+	struct trusted_key_options *options = NULL;
 	int ret = 0;
+	int tpm2;
 
-	if (key_is_negative(key))
-		return -ENOKEY;
-	p = key->payload.data[0];
-	if (!p->migratable)
-		return -EPERM;
-	if (datalen <= 0 || datalen > 32767 || !prep->data)
-		return -EINVAL;
+	tpm2 = tpm_is_tpm2(chip);
+	if (tpm2 < 0)
+		return tpm2;
 
-	datablob = kmalloc(datalen + 1, GFP_KERNEL);
-	if (!datablob)
+	options = trusted_options_alloc();
+	if (!options)
 		return -ENOMEM;
-	new_o = trusted_options_alloc();
-	if (!new_o) {
-		ret = -ENOMEM;
-		goto out;
-	}
-	new_p = trusted_payload_alloc(key);
-	if (!new_p) {
-		ret = -ENOMEM;
-		goto out;
-	}
 
-	memcpy(datablob, prep->data, datalen);
-	datablob[datalen] = '\0';
-	ret = datablob_parse(datablob, new_p, new_o);
-	if (ret != Opt_update) {
-		ret = -EINVAL;
-		kfree_sensitive(new_p);
+	ret = getoptions(datablob, p, options);
+	if (ret < 0)
 		goto out;
-	}
+	dump_options(options);
 
-	if (!new_o->keyhandle) {
+	if (!options->keyhandle) {
 		ret = -EINVAL;
-		kfree_sensitive(new_p);
 		goto out;
 	}
 
-	/* copy old key values, and reseal with new pcrs */
-	new_p->migratable = p->migratable;
-	new_p->key_len = p->key_len;
-	memcpy(new_p->key, p->key, p->key_len);
-	dump_payload(p);
-	dump_payload(new_p);
+	if (tpm2)
+		ret = tpm2_unseal_trusted(chip, p, options);
+	else
+		ret = key_unseal(p, options);
+	if (ret < 0)
+		pr_info("tpm_trusted_key: key_unseal failed (%d)\n", ret);
 
-	ret = key_seal(new_p, new_o);
-	if (ret < 0) {
-		pr_info("trusted_key: key_seal failed (%d)\n", ret);
-		kfree_sensitive(new_p);
-		goto out;
-	}
-	if (new_o->pcrlock) {
-		ret = pcrlock(new_o->pcrlock);
+	if (options->pcrlock) {
+		ret = pcrlock(options->pcrlock);
 		if (ret < 0) {
-			pr_info("trusted_key: pcrlock failed (%d)\n", ret);
-			kfree_sensitive(new_p);
+			pr_info("tpm_trusted_key: pcrlock failed (%d)\n", ret);
 			goto out;
 		}
 	}
-	rcu_assign_keypointer(key, new_p);
-	call_rcu(&p->rcu, trusted_rcu_free);
 out:
-	kfree_sensitive(datablob);
-	kfree_sensitive(new_o);
+	kfree_sensitive(options);
 	return ret;
 }
 
-/*
- * trusted_read - copy the sealed blob data to userspace in hex.
- * On success, return to userspace the trusted key datablob size.
- */
-static long trusted_read(const struct key *key, char *buffer,
-			 size_t buflen)
-{
-	const struct trusted_key_payload *p;
-	char *bufp;
-	int i;
-
-	p = dereference_key_locked(key);
-	if (!p)
-		return -EINVAL;
-
-	if (buffer && buflen >= 2 * p->blob_len) {
-		bufp = buffer;
-		for (i = 0; i < p->blob_len; i++)
-			bufp = hex_byte_pack(bufp, p->blob[i]);
-	}
-	return 2 * p->blob_len;
-}
-
-/*
- * trusted_destroy - clear and free the key's payload
- */
-static void trusted_destroy(struct key *key)
+static int trusted_tpm_get_random(unsigned char *key, size_t key_len)
 {
-	kfree_sensitive(key->payload.data[0]);
+	return tpm_get_random(chip, key, key_len);
 }
 
-struct key_type key_type_trusted = {
-	.name = "trusted",
-	.instantiate = trusted_instantiate,
-	.update = trusted_update,
-	.destroy = trusted_destroy,
-	.describe = user_describe,
-	.read = trusted_read,
-};
-
-EXPORT_SYMBOL_GPL(key_type_trusted);
-
 static void trusted_shash_release(void)
 {
 	if (hashalg)
@@ -1182,14 +957,14 @@ static int __init trusted_shash_alloc(void)
 
 	hmacalg = crypto_alloc_shash(hmac_alg, 0, 0);
 	if (IS_ERR(hmacalg)) {
-		pr_info("trusted_key: could not allocate crypto %s\n",
+		pr_info("tpm_trusted_key: could not allocate crypto %s\n",
 			hmac_alg);
 		return PTR_ERR(hmacalg);
 	}
 
 	hashalg = crypto_alloc_shash(hash_alg, 0, 0);
 	if (IS_ERR(hashalg)) {
-		pr_info("trusted_key: could not allocate crypto %s\n",
+		pr_info("tpm_trusted_key: could not allocate crypto %s\n",
 			hash_alg);
 		ret = PTR_ERR(hashalg);
 		goto hashalg_fail;
@@ -1217,16 +992,13 @@ static int __init init_digests(void)
 	return 0;
 }
 
-static int __init init_trusted(void)
+static int trusted_tpm_init(void)
 {
 	int ret;
 
-	/* encrypted_keys.ko depends on successful load of this module even if
-	 * TPM is not used.
-	 */
 	chip = tpm_default_chip();
 	if (!chip)
-		return 0;
+		return -ENODEV;
 
 	ret = init_digests();
 	if (ret < 0)
@@ -1247,7 +1019,7 @@ static int __init init_trusted(void)
 	return ret;
 }
 
-static void __exit cleanup_trusted(void)
+static void trusted_tpm_exit(void)
 {
 	if (chip) {
 		put_device(&chip->dev);
@@ -1257,7 +1029,11 @@ static void __exit cleanup_trusted(void)
 	}
 }
 
-late_initcall(init_trusted);
-module_exit(cleanup_trusted);
-
-MODULE_LICENSE("GPL");
+struct trusted_key_ops tpm_trusted_key_ops = {
+	.migratable = 1, /* migratable by default */
+	.init = trusted_tpm_init,
+	.seal = trusted_tpm_seal,
+	.unseal = trusted_tpm_unseal,
+	.get_random = trusted_tpm_get_random,
+	.exit = trusted_tpm_exit,
+};
