Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull security subsystem update from James Morris:
 "This is mostly maintenance updates across the subsystem, with a
  notable update for TPM 2.0, and addition of Jarkko Sakkinen as a
  maintainer of that"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (40 commits)
  apparmor: clarify CRYPTO dependency
  selinux: Use a kmem_cache for allocation struct file_security_struct
  selinux: ioctl_has_perm should be static
  selinux: use sprintf return value
  selinux: use kstrdup() in security_get_bools()
  selinux: use kmemdup in security_sid_to_context_core()
  selinux: remove pointless cast in selinux_inode_setsecurity()
  selinux: introduce security_context_str_to_sid
  selinux: do not check open perm on ftruncate call
  selinux: change CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE default
  KEYS: Merge the type-specific data with the payload data
  KEYS: Provide a script to extract a module signature
  KEYS: Provide a script to extract the sys cert list from a vmlinux file
  keys: Be more consistent in selection of union members used
  certs: add .gitignore to stop git nagging about x509_certificate_list
  KEYS: use kvfree() in add_key
  Smack: limited capability for changing process label
  TPM: remove unnecessary little endian conversion
  vTPM: support little endian guests
  char: Drop owner assignment from i2c_driver
  ...

16 files changed, 720 insertions, 127 deletions

diff --git a/drivers/char/tpm/st33zp24/Kconfig b/drivers/char/tpm/st33zp24/Kconfig
index 09cb727864f0..19c007461d1c 100644
--- a/drivers/char/tpm/st33zp24/Kconfig
+++ b/drivers/char/tpm/st33zp24/Kconfig
@@ -1,6 +1,6 @@
 config TCG_TIS_ST33ZP24
 	tristate "STMicroelectronics TPM Interface Specification 1.2 Interface"
-	depends on GPIOLIB
+	depends on GPIOLIB || COMPILE_TEST
 	---help---
 	  STMicroelectronics ST33ZP24 core driver. It implements the core
 	  TPM1.2 logic and hooks into the TPM kernel APIs. Physical layers will
diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
index ad1ee180e0c2..309d2767c6a1 100644
--- a/drivers/char/tpm/st33zp24/i2c.c
+++ b/drivers/char/tpm/st33zp24/i2c.c
@@ -258,7 +258,6 @@ static SIMPLE_DEV_PM_OPS(st33zp24_i2c_ops, st33zp24_pm_suspend,
 
 static struct i2c_driver st33zp24_i2c_driver = {
 	.driver = {
-		.owner = THIS_MODULE,
 		.name = TPM_ST33_I2C,
 		.pm = &st33zp24_i2c_ops,
 		.of_match_table = of_match_ptr(of_st33zp24_i2c_match),
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 1082d4bb016a..f26b0ae23bea 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -119,6 +119,9 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
 	chip->dev.class = tpm_class;
 	chip->dev.release = tpm_dev_release;
 	chip->dev.parent = chip->pdev;
+#ifdef CONFIG_ACPI
+	chip->dev.groups = chip->groups;
+#endif
 
 	if (chip->dev_num == 0)
 		chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);
@@ -182,12 +185,6 @@ static int tpm1_chip_register(struct tpm_chip *chip)
 	if (rc)
 		return rc;
 
-	rc = tpm_add_ppi(chip);
-	if (rc) {
-		tpm_sysfs_del_device(chip);
-		return rc;
-	}
-
 	chip->bios_dir = tpm_bios_log_setup(chip->devname);
 
 	return 0;
@@ -201,8 +198,6 @@ static void tpm1_chip_unregister(struct tpm_chip *chip)
 	if (chip->bios_dir)
 		tpm_bios_log_teardown(chip->bios_dir);
 
-	tpm_remove_ppi(chip);
-
 	tpm_sysfs_del_device(chip);
 }
 
@@ -225,10 +220,20 @@ int tpm_chip_register(struct tpm_chip *chip)
 	if (rc)
 		return rc;
 
+	tpm_add_ppi(chip);
+
 	rc = tpm_dev_add_device(chip);
 	if (rc)
 		goto out_err;
 
+	if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+		rc = __compat_only_sysfs_link_entry_to_kobj(&chip->pdev->kobj,
+							    &chip->dev.kobj,
+							    "ppi");
+		if (rc)
+			goto out_err;
+	}
+
 	/* Make the chip available. */
 	spin_lock(&driver_lock);
 	list_add_rcu(&chip->list, &tpm_chip_list);
@@ -263,6 +268,9 @@ void tpm_chip_unregister(struct tpm_chip *chip)
 	spin_unlock(&driver_lock);
 	synchronize_rcu();
 
+	if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
+		sysfs_remove_link(&chip->pdev->kobj, "ppi");
+
 	tpm1_chip_unregister(chip);
 	tpm_dev_del_device(chip);
 }
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index e85d3416d899..c50637db3a8a 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -666,6 +666,30 @@ int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
 }
 
 /**
+ * tpm_is_tpm2 - is the chip a TPM2 chip?
+ * @chip_num:	tpm idx # or ANY
+ *
+ * Returns < 0 on error, and 1 or 0 on success depending whether the chip
+ * is a TPM2 chip.
+ */
+int tpm_is_tpm2(u32 chip_num)
+{
+	struct tpm_chip *chip;
+	int rc;
+
+	chip = tpm_chip_find_get(chip_num);
+	if (chip == NULL)
+		return -ENODEV;
+
+	rc = (chip->flags & TPM_CHIP_FLAG_TPM2) != 0;
+
+	tpm_chip_put(chip);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_is_tpm2);
+
+/**
  * tpm_pcr_read - read a pcr value
  * @chip_num:	tpm idx # or ANY
  * @pcr_idx:	pcr idx to retrieve
@@ -1021,6 +1045,58 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
 }
 EXPORT_SYMBOL_GPL(tpm_get_random);
 
+/**
+ * tpm_seal_trusted() - seal a trusted key
+ * @chip_num: A specific chip number for the request or TPM_ANY_NUM
+ * @options: authentication values and other options
+ * @payload: the key data in clear and encrypted form
+ *
+ * Returns < 0 on error and 0 on success. At the moment, only TPM 2.0 chips
+ * are supported.
+ */
+int tpm_seal_trusted(u32 chip_num, struct trusted_key_payload *payload,
+		     struct trusted_key_options *options)
+{
+	struct tpm_chip *chip;
+	int rc;
+
+	chip = tpm_chip_find_get(chip_num);
+	if (chip == NULL || !(chip->flags & TPM_CHIP_FLAG_TPM2))
+		return -ENODEV;
+
+	rc = tpm2_seal_trusted(chip, payload, options);
+
+	tpm_chip_put(chip);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_seal_trusted);
+
+/**
+ * tpm_unseal_trusted() - unseal a trusted key
+ * @chip_num: A specific chip number for the request or TPM_ANY_NUM
+ * @options: authentication values and other options
+ * @payload: the key data in clear and encrypted form
+ *
+ * Returns < 0 on error and 0 on success. At the moment, only TPM 2.0 chips
+ * are supported.
+ */
+int tpm_unseal_trusted(u32 chip_num, struct trusted_key_payload *payload,
+		       struct trusted_key_options *options)
+{
+	struct tpm_chip *chip;
+	int rc;
+
+	chip = tpm_chip_find_get(chip_num);
+	if (chip == NULL || !(chip->flags & TPM_CHIP_FLAG_TPM2))
+		return -ENODEV;
+
+	rc = tpm2_unseal_trusted(chip, payload, options);
+
+	tpm_chip_put(chip);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_unseal_trusted);
+
 static int __init tpm_init(void)
 {
 	int rc;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index f8319a0860fd..a4257a32964f 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2015 Intel Corporation
  *
  * Authors:
  * Leendert van Doorn <leendert@watson.ibm.com>
@@ -28,6 +29,7 @@
 #include <linux/tpm.h>
 #include <linux/acpi.h>
 #include <linux/cdev.h>
+#include <linux/highmem.h>
 
 enum tpm_const {
 	TPM_MINOR = 224,	/* officially assigned */
@@ -88,6 +90,9 @@ enum tpm2_return_codes {
 
 enum tpm2_algorithms {
 	TPM2_ALG_SHA1		= 0x0004,
+	TPM2_ALG_KEYEDHASH	= 0x0008,
+	TPM2_ALG_SHA256		= 0x000B,
+	TPM2_ALG_NULL		= 0x0010
 };
 
 enum tpm2_command_codes {
@@ -95,6 +100,10 @@ enum tpm2_command_codes {
 	TPM2_CC_SELF_TEST	= 0x0143,
 	TPM2_CC_STARTUP		= 0x0144,
 	TPM2_CC_SHUTDOWN	= 0x0145,
+	TPM2_CC_CREATE		= 0x0153,
+	TPM2_CC_LOAD		= 0x0157,
+	TPM2_CC_UNSEAL		= 0x015E,
+	TPM2_CC_FLUSH_CONTEXT	= 0x0165,
 	TPM2_CC_GET_CAPABILITY	= 0x017A,
 	TPM2_CC_GET_RANDOM	= 0x017B,
 	TPM2_CC_PCR_READ	= 0x017E,
@@ -115,6 +124,13 @@ enum tpm2_startup_types {
 	TPM2_SU_STATE	= 0x0001,
 };
 
+enum tpm2_start_method {
+	TPM2_START_ACPI = 2,
+	TPM2_START_FIFO = 6,
+	TPM2_START_CRB = 7,
+	TPM2_START_CRB_WITH_ACPI = 8,
+};
+
 struct tpm_chip;
 
 struct tpm_vendor_specific {
@@ -151,8 +167,7 @@ struct tpm_vendor_specific {
 
 enum tpm_chip_flags {
 	TPM_CHIP_FLAG_REGISTERED	= BIT(0),
-	TPM_CHIP_FLAG_PPI		= BIT(1),
-	TPM_CHIP_FLAG_TPM2		= BIT(2),
+	TPM_CHIP_FLAG_TPM2		= BIT(1),
 };
 
 struct tpm_chip {
@@ -175,6 +190,8 @@ struct tpm_chip {
 	struct dentry **bios_dir;
 
 #ifdef CONFIG_ACPI
+	const struct attribute_group *groups[2];
+	unsigned int groups_cnt;
 	acpi_handle acpi_dev_handle;
 	char ppi_version[TPM_PPI_VERSION_LEN + 1];
 #endif /* CONFIG_ACPI */
@@ -182,7 +199,7 @@ struct tpm_chip {
 	struct list_head list;
 };
 
-#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
+#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
 
 static inline void tpm_chip_put(struct tpm_chip *chip)
 {
@@ -382,6 +399,101 @@ struct tpm_cmd_t {
 	tpm_cmd_params	params;
 } __packed;
 
+/* A string buffer type for constructing TPM commands. This is based on the
+ * ideas of string buffer code in security/keys/trusted.h but is heap based
+ * in order to keep the stack usage minimal.
+ */
+
+enum tpm_buf_flags {
+	TPM_BUF_OVERFLOW	= BIT(0),
+};
+
+struct tpm_buf {
+	struct page *data_page;
+	unsigned int flags;
+	u8 *data;
+};
+
+static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
+{
+	struct tpm_input_header *head;
+
+	buf->data_page = alloc_page(GFP_HIGHUSER);
+	if (!buf->data_page)
+		return -ENOMEM;
+
+	buf->flags = 0;
+	buf->data = kmap(buf->data_page);
+
+	head = (struct tpm_input_header *) buf->data;
+
+	head->tag = cpu_to_be16(tag);
+	head->length = cpu_to_be32(sizeof(*head));
+	head->ordinal = cpu_to_be32(ordinal);
+
+	return 0;
+}
+
+static inline void tpm_buf_destroy(struct tpm_buf *buf)
+{
+	kunmap(buf->data_page);
+	__free_page(buf->data_page);
+}
+
+static inline u32 tpm_buf_length(struct tpm_buf *buf)
+{
+	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
+
+	return be32_to_cpu(head->length);
+}
+
+static inline u16 tpm_buf_tag(struct tpm_buf *buf)
+{
+	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
+
+	return be16_to_cpu(head->tag);
+}
+
+static inline void tpm_buf_append(struct tpm_buf *buf,
+				  const unsigned char *new_data,
+				  unsigned int new_len)
+{
+	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
+	u32 len = tpm_buf_length(buf);
+
+	/* Return silently if overflow has already happened. */
+	if (buf->flags & TPM_BUF_OVERFLOW)
+		return;
+
+	if ((len + new_len) > PAGE_SIZE) {
+		WARN(1, "tpm_buf: overflow\n");
+		buf->flags |= TPM_BUF_OVERFLOW;
+		return;
+	}
+
+	memcpy(&buf->data[len], new_data, new_len);
+	head->length = cpu_to_be32(len + new_len);
+}
+
+static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
+{
+	tpm_buf_append(buf, &value, 1);
+}
+
+static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
+{
+	__be16 value2 = cpu_to_be16(value);
+
+	tpm_buf_append(buf, (u8 *) &value2, 2);
+}
+
+static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
+{
+	__be32 value2 = cpu_to_be32(value);
+
+	tpm_buf_append(buf, (u8 *) &value2, 4);
+}
+
 extern struct class *tpm_class;
 extern dev_t tpm_devt;
 extern const struct file_operations tpm_fops;
@@ -412,15 +524,9 @@ void tpm_sysfs_del_device(struct tpm_chip *chip);
 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 
 #ifdef CONFIG_ACPI
-extern int tpm_add_ppi(struct tpm_chip *chip);
-extern void tpm_remove_ppi(struct tpm_chip *chip);
+extern void tpm_add_ppi(struct tpm_chip *chip);
 #else
-static inline int tpm_add_ppi(struct tpm_chip *chip)
-{
-	return 0;
-}
-
-static inline void tpm_remove_ppi(struct tpm_chip *chip)
+static inline void tpm_add_ppi(struct tpm_chip *chip)
 {
 }
 #endif
@@ -428,6 +534,12 @@ static inline void tpm_remove_ppi(struct tpm_chip *chip)
 int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
 int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
+int tpm2_seal_trusted(struct tpm_chip *chip,
+		      struct trusted_key_payload *payload,
+		      struct trusted_key_options *options);
+int tpm2_unseal_trusted(struct tpm_chip *chip,
+			struct trusted_key_payload *payload,
+			struct trusted_key_options *options);
 ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
 			u32 *value, const char *desc);
 
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 011909a9be96..bd7039fafa8a 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Intel Corporation
+ * Copyright (C) 2014, 2015 Intel Corporation
  *
  * Authors:
  * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
@@ -16,6 +16,11 @@
  */
 
 #include "tpm.h"
+#include <keys/trusted-type.h>
+
+enum tpm2_object_attributes {
+	TPM2_ATTR_USER_WITH_AUTH	= BIT(6),
+};
 
 struct tpm2_startup_in {
 	__be16	startup_type;
@@ -381,6 +386,249 @@ static const struct tpm_input_header tpm2_get_tpm_pt_header = {
 };
 
 /**
+ * Append TPMS_AUTH_COMMAND to the buffer. The buffer must be allocated with
+ * tpm_buf_alloc().
+ *
+ * @param buf: an allocated tpm_buf instance
+ * @param nonce: the session nonce, may be NULL if not used
+ * @param nonce_len: the session nonce length, may be 0 if not used
+ * @param attributes: the session attributes
+ * @param hmac: the session HMAC or password, may be NULL if not used
+ * @param hmac_len: the session HMAC or password length, maybe 0 if not used
+ */
+static void tpm2_buf_append_auth(struct tpm_buf *buf, u32 session_handle,
+				 const u8 *nonce, u16 nonce_len,
+				 u8 attributes,
+				 const u8 *hmac, u16 hmac_len)
+{
+	tpm_buf_append_u32(buf, 9 + nonce_len + hmac_len);
+	tpm_buf_append_u32(buf, session_handle);
+	tpm_buf_append_u16(buf, nonce_len);
+
+	if (nonce && nonce_len)
+		tpm_buf_append(buf, nonce, nonce_len);
+
+	tpm_buf_append_u8(buf, attributes);
+	tpm_buf_append_u16(buf, hmac_len);
+
+	if (hmac && hmac_len)
+		tpm_buf_append(buf, hmac, hmac_len);
+}
+
+/**
+ * tpm2_seal_trusted() - seal a trusted key
+ * @chip_num: A specific chip number for the request or TPM_ANY_NUM
+ * @options: authentication values and other options
+ * @payload: the key data in clear and encrypted form
+ *
+ * Returns < 0 on error and 0 on success.
+ */
+int tpm2_seal_trusted(struct tpm_chip *chip,
+		      struct trusted_key_payload *payload,
+		      struct trusted_key_options *options)
+{
+	unsigned int blob_len;
+	struct tpm_buf buf;
+	int rc;
+
+	rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_CREATE);
+	if (rc)
+		return rc;
+
+	tpm_buf_append_u32(&buf, options->keyhandle);
+	tpm2_buf_append_auth(&buf, TPM2_RS_PW,
+			     NULL /* nonce */, 0,
+			     0 /* session_attributes */,
+			     options->keyauth /* hmac */,
+			     TPM_DIGEST_SIZE);
+
+	/* sensitive */
+	tpm_buf_append_u16(&buf, 4 + TPM_DIGEST_SIZE + payload->key_len);
+
+	tpm_buf_append_u16(&buf, TPM_DIGEST_SIZE);
+	tpm_buf_append(&buf, options->blobauth, TPM_DIGEST_SIZE);
+	tpm_buf_append_u16(&buf, payload->key_len);
+	tpm_buf_append(&buf, payload->key, payload->key_len);
+
+	/* public */
+	tpm_buf_append_u16(&buf, 14);
+
+	tpm_buf_append_u16(&buf, TPM2_ALG_KEYEDHASH);
+	tpm_buf_append_u16(&buf, TPM2_ALG_SHA256);
+	tpm_buf_append_u32(&buf, TPM2_ATTR_USER_WITH_AUTH);
+	tpm_buf_append_u16(&buf, 0); /* policy digest size */
+	tpm_buf_append_u16(&buf, TPM2_ALG_NULL);
+	tpm_buf_append_u16(&buf, 0);
+
+	/* outside info */
+	tpm_buf_append_u16(&buf, 0);
+
+	/* creation PCR */
+	tpm_buf_append_u32(&buf, 0);
+
+	if (buf.flags & TPM_BUF_OVERFLOW) {
+		rc = -E2BIG;
+		goto out;
+	}
+
+	rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "sealing data");
+	if (rc)
+		goto out;
+
+	blob_len = be32_to_cpup((__be32 *) &buf.data[TPM_HEADER_SIZE]);
+	if (blob_len > MAX_BLOB_SIZE) {
+		rc = -E2BIG;
+		goto out;
+	}
+
+	memcpy(payload->blob, &buf.data[TPM_HEADER_SIZE + 4], blob_len);
+	payload->blob_len = blob_len;
+
+out:
+	tpm_buf_destroy(&buf);
+
+	if (rc > 0)
+		rc = -EPERM;
+
+	return rc;
+}
+
+static int tpm2_load(struct tpm_chip *chip,
+		     struct trusted_key_payload *payload,
+		     struct trusted_key_options *options,
+		     u32 *blob_handle)
+{
+	struct tpm_buf buf;
+	unsigned int private_len;
+	unsigned int public_len;
+	unsigned int blob_len;
+	int rc;
+
+	private_len = be16_to_cpup((__be16 *) &payload->blob[0]);
+	if (private_len > (payload->blob_len - 2))
+		return -E2BIG;
+
+	public_len = be16_to_cpup((__be16 *) &payload->blob[2 + private_len]);
+	blob_len = private_len + public_len + 4;
+	if (blob_len > payload->blob_len)
+		return -E2BIG;
+
+	rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_LOAD);
+	if (rc)
+		return rc;
+
+	tpm_buf_append_u32(&buf, options->keyhandle);
+	tpm2_buf_append_auth(&buf, TPM2_RS_PW,
+			     NULL /* nonce */, 0,
+			     0 /* session_attributes */,
+			     options->keyauth /* hmac */,
+			     TPM_DIGEST_SIZE);
+
+	tpm_buf_append(&buf, payload->blob, blob_len);
+
+	if (buf.flags & TPM_BUF_OVERFLOW) {
+		rc = -E2BIG;
+		goto out;
+	}
+
+	rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "loading blob");
+	if (!rc)
+		*blob_handle = be32_to_cpup(
+			(__be32 *) &buf.data[TPM_HEADER_SIZE]);
+
+out:
+	tpm_buf_destroy(&buf);
+
+	if (rc > 0)
+		rc = -EPERM;
+
+	return rc;
+}
+
+static void tpm2_flush_context(struct tpm_chip *chip, u32 handle)
+{
+	struct tpm_buf buf;
+	int rc;
+
+	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);
+	if (rc) {
+		dev_warn(chip->pdev, "0x%08x was not flushed, out of memory\n",
+			 handle);
+		return;
+	}
+
+	tpm_buf_append_u32(&buf, handle);
+
+	rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "flushing context");
+	if (rc)
+		dev_warn(chip->pdev, "0x%08x was not flushed, rc=%d\n", handle,
+			 rc);
+
+	tpm_buf_destroy(&buf);
+}
+
+static int tpm2_unseal(struct tpm_chip *chip,
+		       struct trusted_key_payload *payload,
+		       struct trusted_key_options *options,
+		       u32 blob_handle)
+{
+	struct tpm_buf buf;
+	int rc;
+
+	rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_UNSEAL);
+	if (rc)
+		return rc;
+
+	tpm_buf_append_u32(&buf, blob_handle);
+	tpm2_buf_append_auth(&buf, TPM2_RS_PW,
+			     NULL /* nonce */, 0,
+			     0 /* session_attributes */,
+			     options->blobauth /* hmac */,
+			     TPM_DIGEST_SIZE);
+
+	rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "unsealing");
+	if (rc > 0)
+		rc = -EPERM;
+
+	if (!rc) {
+		payload->key_len = be16_to_cpup(
+			(__be16 *) &buf.data[TPM_HEADER_SIZE + 4]);
+
+		memcpy(payload->key, &buf.data[TPM_HEADER_SIZE + 6],
+		       payload->key_len);
+	}
+
+	tpm_buf_destroy(&buf);
+	return rc;
+}
+
+/**
+ * tpm_unseal_trusted() - unseal a trusted key
+ * @chip_num: A specific chip number for the request or TPM_ANY_NUM
+ * @options: authentication values and other options
+ * @payload: the key data in clear and encrypted form
+ *
+ * Returns < 0 on error and 0 on success.
+ */
+int tpm2_unseal_trusted(struct tpm_chip *chip,
+			struct trusted_key_payload *payload,
+			struct trusted_key_options *options)
+{
+	u32 blob_handle;
+	int rc;
+
+	rc = tpm2_load(chip, payload, options, &blob_handle);
+	if (rc)
+		return rc;
+
+	rc = tpm2_unseal(chip, payload, options, blob_handle);
+
+	tpm2_flush_context(chip, blob_handle);
+
+	return rc;
+}
+
+/**
  * tpm2_get_tpm_pt() - get value of a TPM_CAP_TPM_PROPERTIES type property
  * @chip:		TPM chip to use.
  * @property_id:	property ID.
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 1267322595da..4bb9727c1047 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -34,12 +34,6 @@ enum crb_defaults {
 	CRB_ACPI_START_INDEX = 1,
 };
 
-enum crb_start_method {
-	CRB_SM_ACPI_START = 2,
-	CRB_SM_CRB = 7,
-	CRB_SM_CRB_WITH_ACPI_START = 8,
-};
-
 struct acpi_tpm2 {
 	struct acpi_table_header hdr;
 	u16 platform_class;
@@ -74,7 +68,8 @@ struct crb_control_area {
 	u32 int_enable;
 	u32 int_sts;
 	u32 cmd_size;
-	u64 cmd_pa;
+	u32 cmd_pa_low;
+	u32 cmd_pa_high;
 	u32 rsp_size;
 	u64 rsp_pa;
 } __packed;
@@ -220,12 +215,6 @@ static int crb_acpi_add(struct acpi_device *device)
 	u64 pa;
 	int rc;
 
-	chip = tpmm_chip_alloc(dev, &tpm_crb);
-	if (IS_ERR(chip))
-		return PTR_ERR(chip);
-
-	chip->flags = TPM_CHIP_FLAG_TPM2;
-
 	status = acpi_get_table(ACPI_SIG_TPM2, 1,
 				(struct acpi_table_header **) &buf);
 	if (ACPI_FAILURE(status)) {
@@ -233,13 +222,15 @@ static int crb_acpi_add(struct acpi_device *device)
 		return -ENODEV;
 	}
 
-	/* At least some versions of AMI BIOS have a bug that TPM2 table has
-	 * zero address for the control area and therefore we must fail.
-	*/
-	if (!buf->control_area_pa) {
-		dev_err(dev, "TPM2 ACPI table has a zero address for the control area\n");
-		return -EINVAL;
-	}
+	/* Should the FIFO driver handle this? */
+	if (buf->start_method == TPM2_START_FIFO)
+		return -ENODEV;
+
+	chip = tpmm_chip_alloc(dev, &tpm_crb);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
+
+	chip->flags = TPM_CHIP_FLAG_TPM2;
 
 	if (buf->hdr.length < sizeof(struct acpi_tpm2)) {
 		dev_err(dev, "TPM2 ACPI table has wrong size");
@@ -259,11 +250,11 @@ static int crb_acpi_add(struct acpi_device *device)
 	 * report only ACPI start but in practice seems to require both
 	 * ACPI start and CRB start.
 	 */
-	if (sm == CRB_SM_CRB || sm == CRB_SM_CRB_WITH_ACPI_START ||
+	if (sm == TPM2_START_CRB || sm == TPM2_START_FIFO ||
 	    !strcmp(acpi_device_hid(device), "MSFT0101"))
 		priv->flags |= CRB_FL_CRB_START;
 
-	if (sm == CRB_SM_ACPI_START || sm == CRB_SM_CRB_WITH_ACPI_START)
+	if (sm == TPM2_START_ACPI || sm == TPM2_START_CRB_WITH_ACPI)
 		priv->flags |= CRB_FL_ACPI_START;
 
 	priv->cca = (struct crb_control_area __iomem *)
@@ -273,8 +264,8 @@ static int crb_acpi_add(struct acpi_device *device)
 		return -ENOMEM;
 	}
 
-	memcpy_fromio(&pa, &priv->cca->cmd_pa, 8);
-	pa = le64_to_cpu(pa);
+	pa = ((u64) le32_to_cpu(ioread32(&priv->cca->cmd_pa_high)) << 32) |
+		(u64) le32_to_cpu(ioread32(&priv->cca->cmd_pa_low));
 	priv->cmd = devm_ioremap_nocache(dev, pa,
 					 ioread32(&priv->cca->cmd_size));
 	if (!priv->cmd) {
diff --git a/drivers/char/tpm/tpm_eventlog.c b/drivers/char/tpm/tpm_eventlog.c
index 3a56a131586c..bd72fb04225e 100644
--- a/drivers/char/tpm/tpm_eventlog.c
+++ b/drivers/char/tpm/tpm_eventlog.c
@@ -76,15 +76,25 @@ static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
 	void *addr = log->bios_event_log;
 	void *limit = log->bios_event_log_end;
 	struct tcpa_event *event;
+	u32 converted_event_size;
+	u32 converted_event_type;
+
 
 	/* read over *pos measurements */
 	for (i = 0; i < *pos; i++) {
 		event = addr;
 
+		converted_event_size =
+		    do_endian_conversion(event->event_size);
+		converted_event_type =
+		    do_endian_conversion(event->event_type);
+
 		if ((addr + sizeof(struct tcpa_event)) < limit) {
-			if (event->event_type == 0 && event->event_size == 0)
+			if ((converted_event_type == 0) &&
+			    (converted_event_size == 0))
 				return NULL;
-			addr += sizeof(struct tcpa_event) + event->event_size;
+			addr += (sizeof(struct tcpa_event) +
+				 converted_event_size);
 		}
 	}
 
@@ -94,8 +104,12 @@ static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
 
 	event = addr;
 
-	if ((event->event_type == 0 && event->event_size == 0) ||
-	    ((addr + sizeof(struct tcpa_event) + event->event_size) >= limit))
+	converted_event_size = do_endian_conversion(event->event_size);
+	converted_event_type = do_endian_conversion(event->event_type);
+
+	if (((converted_event_type == 0) && (converted_event_size == 0))
+	    || ((addr + sizeof(struct tcpa_event) + converted_event_size)
+		>= limit))
 		return NULL;
 
 	return addr;
@@ -107,8 +121,12 @@ static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
 	struct tcpa_event *event = v;
 	struct tpm_bios_log *log = m->private;
 	void *limit = log->bios_event_log_end;
+	u32 converted_event_size;
+	u32 converted_event_type;
 
-	v += sizeof(struct tcpa_event) + event->event_size;
+	converted_event_size = do_endian_conversion(event->event_size);
+
+	v += sizeof(struct tcpa_event) + converted_event_size;
 
 	/* now check if current entry is valid */
 	if ((v + sizeof(struct tcpa_event)) >= limit)
@@ -116,11 +134,11 @@ static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
 
 	event = v;
 
-	if (event->event_type == 0 && event->event_size == 0)
-		return NULL;
+	converted_event_size = do_endian_conversion(event->event_size);
+	converted_event_type = do_endian_conversion(event->event_type);
 
-	if ((event->event_type == 0 && event->event_size == 0) ||
-	    ((v + sizeof(struct tcpa_event) + event->event_size) >= limit))
+	if (((converted_event_type == 0) && (converted_event_size == 0)) ||
+	    ((v + sizeof(struct tcpa_event) + converted_event_size) >= limit))
 		return NULL;
 
 	(*pos)++;
@@ -140,7 +158,7 @@ static int get_event_name(char *dest, struct tcpa_event *event,
 	int i, n_len = 0, d_len = 0;
 	struct tcpa_pc_event *pc_event;
 
-	switch(event->event_type) {
+	switch (do_endian_conversion(event->event_type)) {
 	case PREBOOT:
 	case POST_CODE:
 	case UNUSED:
@@ -156,14 +174,16 @@ static int get_event_name(char *dest, struct tcpa_event *event,
 	case NONHOST_CODE:
 	case NONHOST_CONFIG:
 	case NONHOST_INFO:
-		name = tcpa_event_type_strings[event->event_type];
+		name = tcpa_event_type_strings[do_endian_conversion
+						(event->event_type)];
 		n_len = strlen(name);
 		break;
 	case SEPARATOR:
 	case ACTION:
-		if (MAX_TEXT_EVENT > event->event_size) {
+		if (MAX_TEXT_EVENT >
+		    do_endian_conversion(event->event_size)) {
 			name = event_entry;
-			n_len = event->event_size;
+			n_len = do_endian_conversion(event->event_size);
 		}
 		break;
 	case EVENT_TAG:
@@ -171,7 +191,7 @@ static int get_event_name(char *dest, struct tcpa_event *event,
 
 		/* ToDo Row data -> Base64 */
 
-		switch (pc_event->event_id) {
+		switch (do_endian_conversion(pc_event->event_id)) {
 		case SMBIOS:
 		case BIS_CERT:
 		case CMOS:
@@ -179,7 +199,8 @@ static int get_event_name(char *dest, struct tcpa_event *event,
 		case OPTION_ROM_EXEC:
 		case OPTION_ROM_CONFIG:
 		case S_CRTM_VERSION:
-			name = tcpa_pc_event_id_strings[pc_event->event_id];
+			name = tcpa_pc_event_id_strings[do_endian_conversion
+							(pc_event->event_id)];
 			n_len = strlen(name);
 			break;
 		/* hash data */
@@ -188,7 +209,8 @@ static int get_event_name(char *dest, struct tcpa_event *event,
 		case OPTION_ROM_MICROCODE:
 		case S_CRTM_CONTENTS:
 		case POST_CONTENTS:
-			name = tcpa_pc_event_id_strings[pc_event->event_id];
+			name = tcpa_pc_event_id_strings[do_endian_conversion
+							(pc_event->event_id)];
 			n_len = strlen(name);
 			for (i = 0; i < 20; i++)
 				d_len += sprintf(&data[2*i], "%02x",
@@ -209,13 +231,24 @@ static int get_event_name(char *dest, struct tcpa_event *event,
 static int tpm_binary_bios_measurements_show(struct seq_file *m, void *v)
 {
 	struct tcpa_event *event = v;
-	char *data = v;
+	struct tcpa_event temp_event;
+	char *tempPtr;
 	int i;
 
-	for (i = 0; i < sizeof(struct tcpa_event) + event->event_size; i++)
-		seq_putc(m, data[i]);
+	memcpy(&temp_event, event, sizeof(struct tcpa_event));
+
+	/* convert raw integers for endianness */
+	temp_event.pcr_index = do_endian_conversion(event->pcr_index);
+	temp_event.event_type = do_endian_conversion(event->event_type);
+	temp_event.event_size = do_endian_conversion(event->event_size);
+
+	tempPtr = (char *)&temp_event;
+
+	for (i = 0; i < sizeof(struct tcpa_event) + temp_event.event_size; i++)
+		seq_putc(m, tempPtr[i]);
 
 	return 0;
+
 }
 
 static int tpm_bios_measurements_release(struct inode *inode,
@@ -238,7 +271,7 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
 	char *eventname;
 	struct tcpa_event *event = v;
 	unsigned char *event_entry =
-	    (unsigned char *) (v + sizeof(struct tcpa_event));
+	    (unsigned char *)(v + sizeof(struct tcpa_event));
 
 	eventname = kmalloc(MAX_TEXT_EVENT, GFP_KERNEL);
 	if (!eventname) {
@@ -247,13 +280,14 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
 		return -EFAULT;
 	}
 
-	seq_printf(m, "%2d ", event->pcr_index);
+	/* 1st: PCR */
+	seq_printf(m, "%2d ", do_endian_conversion(event->pcr_index));
 
 	/* 2nd: SHA1 */
 	seq_printf(m, "%20phN", event->pcr_value);
 
 	/* 3rd: event type identifier */
-	seq_printf(m, " %02x", event->event_type);
+	seq_printf(m, " %02x", do_endian_conversion(event->event_type));
 
 	len += get_event_name(eventname, event, event_entry);
 
diff --git a/drivers/char/tpm/tpm_eventlog.h b/drivers/char/tpm/tpm_eventlog.h
index e7da086d6928..267bfbd1b7bb 100644
--- a/drivers/char/tpm/tpm_eventlog.h
+++ b/drivers/char/tpm/tpm_eventlog.h
@@ -6,6 +6,12 @@
 #define MAX_TEXT_EVENT		1000	/* Max event string length */
 #define ACPI_TCPA_SIG		"TCPA"	/* 0x41504354 /'TCPA' */
 
+#ifdef CONFIG_PPC64
+#define do_endian_conversion(x) be32_to_cpu(x)
+#else
+#define do_endian_conversion(x) x
+#endif
+
 enum bios_platform_class {
 	BIOS_CLIENT = 0x00,
 	BIOS_SERVER = 0x01,
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 7a0ca78ad3c6..8dfb88b9739c 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -217,7 +217,6 @@ static struct i2c_driver i2c_atmel_driver = {
 	.remove = i2c_atmel_remove,
 	.driver = {
 		.name = I2C_DRIVER_NAME,
-		.owner = THIS_MODULE,
 		.pm = &i2c_atmel_pm_ops,
 		.of_match_table = of_match_ptr(i2c_atmel_of_match),
 	},
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 33c5f360ab01..63d5d22e9e60 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -711,7 +711,6 @@ static struct i2c_driver tpm_tis_i2c_driver = {
 	.remove = tpm_tis_i2c_remove,
 	.driver = {
 		   .name = "tpm_i2c_infineon",
-		   .owner = THIS_MODULE,
 		   .pm = &tpm_tis_i2c_ops,
 		   .of_match_table = of_match_ptr(tpm_tis_i2c_of_match),
 		   },
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 9d42b7d78e50..847f1597fe9b 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -641,7 +641,6 @@ static struct i2c_driver i2c_nuvoton_driver = {
 	.remove = i2c_nuvoton_remove,
 	.driver = {
 		.name = I2C_DRIVER_NAME,
-		.owner = THIS_MODULE,
 		.pm = &i2c_nuvoton_pm_ops,
 		.of_match_table = of_match_ptr(i2c_nuvoton_of_match),
 	},
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index 27ebf9511cb4..3e6a22658b63 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -491,7 +491,7 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq,
 			}
 			ibmvtpm->rtce_size = be16_to_cpu(crq->len);
 			ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size,
-						    GFP_KERNEL);
+						    GFP_ATOMIC);
 			if (!ibmvtpm->rtce_buf) {
 				dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n");
 				return;
diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c
index eebe6256918f..1141456a4b1f 100644
--- a/drivers/char/tpm/tpm_of.c
+++ b/drivers/char/tpm/tpm_of.c
@@ -24,14 +24,14 @@ int read_log(struct tpm_bios_log *log)
 {
 	struct device_node *np;
 	const u32 *sizep;
-	const __be64 *basep;
+	const u64 *basep;
 
 	if (log->bios_event_log != NULL) {
 		pr_err("%s: ERROR - Eventlog already initialized\n", __func__);
 		return -EFAULT;
 	}
 
-	np = of_find_node_by_name(NULL, "ibm,vtpm");
+	np = of_find_node_by_name(NULL, "vtpm");
 	if (!np) {
 		pr_err("%s: ERROR - IBMVTPM not supported\n", __func__);
 		return -ENODEV;
@@ -63,7 +63,7 @@ int read_log(struct tpm_bios_log *log)
 
 	log->bios_event_log_end = log->bios_event_log + *sizep;
 
-	memcpy(log->bios_event_log, __va(be64_to_cpup(basep)), *sizep);
+	memcpy(log->bios_event_log, __va(*basep), *sizep);
 
 	return 0;
 
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 6ca9b5d78144..692a2c6ae036 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -53,7 +53,7 @@ tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
 static ssize_t tpm_show_ppi_version(struct device *dev,
 				    struct device_attribute *attr, char *buf)
 {
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);
 }
@@ -63,7 +63,7 @@ static ssize_t tpm_show_ppi_request(struct device *dev,
 {
 	ssize_t size = -EINVAL;
 	union acpi_object *obj;
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,
 			   ACPI_TYPE_PACKAGE, NULL);
@@ -100,7 +100,7 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
 	int func = TPM_PPI_FN_SUBREQ;
 	union acpi_object *obj, tmp;
 	union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	/*
 	 * the function to submit TPM operation request to pre-os environment
@@ -156,7 +156,7 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev,
 		.buffer.length = 0,
 		.buffer.pointer = NULL
 	};
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	static char *info[] = {
 		"None",
@@ -197,7 +197,7 @@ static ssize_t tpm_show_ppi_response(struct device *dev,
 	acpi_status status = -EINVAL;
 	union acpi_object *obj, *ret_obj;
 	u64 req, res;
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,
 			   ACPI_TYPE_PACKAGE, NULL);
@@ -296,7 +296,7 @@ static ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
 					   struct device_attribute *attr,
 					   char *buf)
 {
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	return show_ppi_operations(chip->acpi_dev_handle, buf, 0,
 				   PPI_TPM_REQ_MAX);
@@ -306,7 +306,7 @@ static ssize_t tpm_show_ppi_vs_operations(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
-	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct tpm_chip *chip = to_tpm_chip(dev);
 
 	return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,
 				   PPI_VS_REQ_END);
@@ -334,17 +334,16 @@ static struct attribute_group ppi_attr_grp = {
 	.attrs = ppi_attrs
 };
 
-int tpm_add_ppi(struct tpm_chip *chip)
+void tpm_add_ppi(struct tpm_chip *chip)
 {
 	union acpi_object *obj;
-	int rc;
 
 	if (!chip->acpi_dev_handle)
-		return 0;
+		return;
 
 	if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
 			    TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
-		return 0;
+		return;
 
 	/* Cache PPI version string. */
 	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
@@ -356,16 +355,5 @@ int tpm_add_ppi(struct tpm_chip *chip)
 		ACPI_FREE(obj);
 	}
 
-	rc = sysfs_create_group(&chip->pdev->kobj, &ppi_attr_grp);
-
-	if (!rc)
-		chip->flags |= TPM_CHIP_FLAG_PPI;
-
-	return rc;
-}
-
-void tpm_remove_ppi(struct tpm_chip *chip)
-{
-	if (chip->flags & TPM_CHIP_FLAG_PPI)
-		sysfs_remove_group(&chip->pdev->kobj, &ppi_attr_grp);
+	chip->groups[chip->groups_cnt++] = &ppi_attr_grp;
 }
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index f2dffa770b8e..696ef1d56b4f 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2005, 2006 IBM Corporation
- * Copyright (C) 2014 Intel Corporation
+ * Copyright (C) 2014, 2015 Intel Corporation
  *
  * Authors:
  * Leendert van Doorn <leendert@watson.ibm.com>
@@ -28,6 +28,7 @@
 #include <linux/wait.h>
 #include <linux/acpi.h>
 #include <linux/freezer.h>
+#include <acpi/actbl2.h>
 #include "tpm.h"
 
 enum tis_access {
@@ -65,6 +66,17 @@ enum tis_defaults {
 	TIS_LONG_TIMEOUT = 2000,	/* 2 sec */
 };
 
+struct tpm_info {
+	unsigned long start;
+	unsigned long len;
+	unsigned int irq;
+};
+
+static struct tpm_info tis_default_info = {
+	.start = TIS_MEM_BASE,
+	.len = TIS_MEM_LEN,
+	.irq = 0,
+};
 
 /* Some timeout values are needed before it is known whether the chip is
  * TPM 1.0 or TPM 2.0.
@@ -91,26 +103,54 @@ struct priv_data {
 };
 
 #if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
-static int is_itpm(struct pnp_dev *dev)
+static int has_hid(struct acpi_device *dev, const char *hid)
 {
-	struct acpi_device *acpi = pnp_acpi_device(dev);
 	struct acpi_hardware_id *id;
 
-	if (!acpi)
-		return 0;
-
-	list_for_each_entry(id, &acpi->pnp.ids, list) {
-		if (!strcmp("INTC0102", id->id))
+	list_for_each_entry(id, &dev->pnp.ids, list)
+		if (!strcmp(hid, id->id))
 			return 1;
-	}
 
 	return 0;
 }
+
+static inline int is_itpm(struct acpi_device *dev)
+{
+	return has_hid(dev, "INTC0102");
+}
+
+static inline int is_fifo(struct acpi_device *dev)
+{
+	struct acpi_table_tpm2 *tbl;
+	acpi_status st;
+
+	/* TPM 1.2 FIFO */
+	if (!has_hid(dev, "MSFT0101"))
+		return 1;
+
+	st = acpi_get_table(ACPI_SIG_TPM2, 1,
+			    (struct acpi_table_header **) &tbl);
+	if (ACPI_FAILURE(st)) {
+		dev_err(&dev->dev, "failed to get TPM2 ACPI table\n");
+		return 0;
+	}
+
+	if (le32_to_cpu(tbl->start_method) != TPM2_START_FIFO)
+		return 0;
+
+	/* TPM 2.0 FIFO */
+	return 1;
+}
 #else
-static inline int is_itpm(struct pnp_dev *dev)
+static inline int is_itpm(struct acpi_device *dev)
 {
 	return 0;
 }
+
+static inline int is_fifo(struct acpi_device *dev)
+{
+	return 1;
+}
 #endif
 
 /* Before we attempt to access the TPM we must see that the valid bit is set.
@@ -600,9 +640,8 @@ static void tpm_tis_remove(struct tpm_chip *chip)
 	release_locality(chip, chip->vendor.locality, 1);
 }
 
-static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
-			resource_size_t start, resource_size_t len,
-			unsigned int irq)
+static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
+			acpi_handle acpi_dev_handle)
 {
 	u32 vendor, intfcaps, intmask;
 	int rc, i, irq_s, irq_e, probe;
@@ -622,7 +661,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
 	chip->acpi_dev_handle = acpi_dev_handle;
 #endif
 
-	chip->vendor.iobase = devm_ioremap(dev, start, len);
+	chip->vendor.iobase = devm_ioremap(dev, tpm_info->start, tpm_info->len);
 	if (!chip->vendor.iobase)
 		return -EIO;
 
@@ -707,7 +746,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
 		  chip->vendor.iobase +
 		  TPM_INT_ENABLE(chip->vendor.locality));
 	if (interrupts)
-		chip->vendor.irq = irq;
+		chip->vendor.irq = tpm_info->irq;
 	if (interrupts && !chip->vendor.irq) {
 		irq_s =
 		    ioread8(chip->vendor.iobase +
@@ -890,27 +929,27 @@ static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
 static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
 				      const struct pnp_device_id *pnp_id)
 {
-	resource_size_t start, len;
-	unsigned int irq = 0;
+	struct tpm_info tpm_info = tis_default_info;
 	acpi_handle acpi_dev_handle = NULL;
 
-	start = pnp_mem_start(pnp_dev, 0);
-	len = pnp_mem_len(pnp_dev, 0);
+	tpm_info.start = pnp_mem_start(pnp_dev, 0);
+	tpm_info.len = pnp_mem_len(pnp_dev, 0);
 
 	if (pnp_irq_valid(pnp_dev, 0))
-		irq = pnp_irq(pnp_dev, 0);
+		tpm_info.irq = pnp_irq(pnp_dev, 0);
 	else
 		interrupts = false;
 
-	if (is_itpm(pnp_dev))
-		itpm = true;
-
 #ifdef CONFIG_ACPI
-	if (pnp_acpi_device(pnp_dev))
+	if (pnp_acpi_device(pnp_dev)) {
+		if (is_itpm(pnp_acpi_device(pnp_dev)))
+			itpm = true;
+
 		acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle;
+	}
 #endif
 
-	return tpm_tis_init(&pnp_dev->dev, acpi_dev_handle, start, len, irq);
+	return tpm_tis_init(&pnp_dev->dev, &tpm_info, acpi_dev_handle);
 }
 
 static struct pnp_device_id tpm_pnp_tbl[] = {
@@ -930,6 +969,7 @@ MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
 static void tpm_tis_pnp_remove(struct pnp_dev *dev)
 {
 	struct tpm_chip *chip = pnp_get_drvdata(dev);
+
 	tpm_chip_unregister(chip);
 	tpm_tis_remove(chip);
 }
@@ -950,6 +990,79 @@ module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
 MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
 #endif
 
+#ifdef CONFIG_ACPI
+static int tpm_check_resource(struct acpi_resource *ares, void *data)
+{
+	struct tpm_info *tpm_info = (struct tpm_info *) data;
+	struct resource res;
+
+	if (acpi_dev_resource_interrupt(ares, 0, &res)) {
+		tpm_info->irq = res.start;
+	} else if (acpi_dev_resource_memory(ares, &res)) {
+		tpm_info->start = res.start;
+		tpm_info->len = resource_size(&res);
+	}
+
+	return 1;
+}
+
+static int tpm_tis_acpi_init(struct acpi_device *acpi_dev)
+{
+	struct list_head resources;
+	struct tpm_info tpm_info = tis_default_info;
+	int ret;
+
+	if (!is_fifo(acpi_dev))
+		return -ENODEV;
+
+	INIT_LIST_HEAD(&resources);
+	ret = acpi_dev_get_resources(acpi_dev, &resources, tpm_check_resource,
+				     &tpm_info);
+	if (ret < 0)
+		return ret;
+
+	acpi_dev_free_resource_list(&resources);
+
+	if (!tpm_info.irq)
+		interrupts = false;
+
+	if (is_itpm(acpi_dev))
+		itpm = true;
+
+	return tpm_tis_init(&acpi_dev->dev, &tpm_info, acpi_dev->handle);
+}
+
+static int tpm_tis_acpi_remove(struct acpi_device *dev)
+{
+	struct tpm_chip *chip = dev_get_drvdata(&dev->dev);
+
+	tpm_chip_unregister(chip);
+	tpm_tis_remove(chip);
+
+	return 0;
+}
+
+static struct acpi_device_id tpm_acpi_tbl[] = {
+	{"MSFT0101", 0},	/* TPM 2.0 */
+	/* Add new here */
+	{"", 0},		/* User Specified */
+	{"", 0}			/* Terminator */
+};
+MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl);
+
+static struct acpi_driver tis_acpi_driver = {
+	.name = "tpm_tis",
+	.ids = tpm_acpi_tbl,
+	.ops = {
+		.add = tpm_tis_acpi_init,
+		.remove = tpm_tis_acpi_remove,
+	},
+	.drv = {
+		.pm = &tpm_tis_pm,
+	},
+};
+#endif
+
 static struct platform_driver tis_drv = {
 	.driver = {
 		.name		= "tpm_tis",
@@ -966,9 +1079,25 @@ static int __init init_tis(void)
 {
 	int rc;
 #ifdef CONFIG_PNP
-	if (!force)
-		return pnp_register_driver(&tis_pnp_driver);
+	if (!force) {
+		rc = pnp_register_driver(&tis_pnp_driver);
+		if (rc)
+			return rc;
+	}
+#endif
+#ifdef CONFIG_ACPI
+	if (!force) {
+		rc = acpi_bus_register_driver(&tis_acpi_driver);
+		if (rc) {
+#ifdef CONFIG_PNP
+			pnp_unregister_driver(&tis_pnp_driver);
 #endif
+			return rc;
+		}
+	}
+#endif
+	if (!force)
+		return 0;
 
 	rc = platform_driver_register(&tis_drv);
 	if (rc < 0)
@@ -978,7 +1107,7 @@ static int __init init_tis(void)
 		rc = PTR_ERR(pdev);
 		goto err_dev;
 	}
-	rc = tpm_tis_init(&pdev->dev, NULL, TIS_MEM_BASE, TIS_MEM_LEN, 0);
+	rc = tpm_tis_init(&pdev->dev, &tis_default_info, NULL);
 	if (rc)
 		goto err_init;
 	return 0;
@@ -992,9 +1121,14 @@ err_dev:
 static void __exit cleanup_tis(void)
 {
 	struct tpm_chip *chip;
-#ifdef CONFIG_PNP
+#if defined(CONFIG_PNP) || defined(CONFIG_ACPI)
 	if (!force) {
+#ifdef CONFIG_ACPI
+		acpi_bus_unregister_driver(&tis_acpi_driver);
+#endif
+#ifdef CONFIG_PNP
 		pnp_unregister_driver(&tis_pnp_driver);
+#endif
 		return;
 	}
 #endif