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- // 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 <linux/bitops.h>
- #include "tpm-utils.h"
- u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode)
- {
- const u8 command_v2[12] = {
- tpm_u16(TPM2_ST_NO_SESSIONS),
- tpm_u32(12),
- tpm_u32(TPM2_CC_STARTUP),
- tpm_u16(mode),
- };
- int ret;
- /*
- * Note TPM2_Startup command will return RC_SUCCESS the first time,
- * but will return RC_INITIALIZE otherwise.
- */
- ret = tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- if (ret && ret != TPM2_RC_INITIALIZE)
- return ret;
- return 0;
- }
- u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test)
- {
- const u8 command_v2[12] = {
- tpm_u16(TPM2_ST_NO_SESSIONS),
- tpm_u32(11),
- tpm_u32(TPM2_CC_SELF_TEST),
- full_test,
- };
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
- const ssize_t pw_sz)
- {
- /* Length of the message header, up to start of password */
- uint offset = 27;
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(offset + pw_sz), /* Length */
- tpm_u32(TPM2_CC_CLEAR), /* Command code */
- /* HANDLE */
- tpm_u32(handle), /* TPM resource handle */
- /* AUTH_SESSION */
- tpm_u32(9 + pw_sz), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(pw_sz), /* Size of <hmac/password> */
- /* STRING(pw) <hmac/password> (if any) */
- };
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the password (if any)
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "s",
- offset, pw, pw_sz);
- offset += pw_sz;
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_nv_define_space(struct udevice *dev, u32 space_index,
- size_t space_size, u32 nv_attributes,
- const u8 *nv_policy, size_t nv_policy_size)
- {
- /*
- * Calculate the offset of the nv_policy piece by adding each of the
- * chunks below.
- */
- uint offset = 10 + 8 + 13 + 14;
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- /* header 10 bytes */
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(offset + nv_policy_size),/* Length */
- tpm_u32(TPM2_CC_NV_DEFINE_SPACE),/* Command code */
- /* handles 8 bytes */
- tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
- /* session header 13 bytes */
- tpm_u32(9), /* Header size */
- tpm_u32(TPM2_RS_PW), /* Password authorisation */
- tpm_u16(0), /* nonce_size */
- 0, /* session_attrs */
- tpm_u16(0), /* auth_size */
- /* message 14 bytes + policy */
- tpm_u16(12 + nv_policy_size), /* size */
- tpm_u32(space_index),
- tpm_u16(TPM2_ALG_SHA256),
- tpm_u32(nv_attributes),
- tpm_u16(nv_policy_size),
- /* nv_policy */
- };
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the password (if any)
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "s",
- offset, nv_policy, nv_policy_size);
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
- const u8 *digest, u32 digest_len)
- {
- /* Length of the message header, up to start of digest */
- uint offset = 33;
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(offset + digest_len), /* Length */
- tpm_u32(TPM2_CC_PCR_EXTEND), /* Command code */
- /* HANDLE */
- tpm_u32(index), /* Handle (PCR Index) */
- /* AUTH_SESSION */
- tpm_u32(9), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(0), /* Size of <hmac/password> */
- /* <hmac/password> (if any) */
- /* hashes */
- tpm_u32(1), /* Count (number of hashes) */
- tpm_u16(algorithm), /* Algorithm of the hash */
- /* STRING(digest) Digest */
- };
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the digest
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "s",
- offset, digest, digest_len);
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- /* header 10 bytes */
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(10 + 8 + 4 + 9 + 4), /* Length */
- tpm_u32(TPM2_CC_NV_READ), /* Command code */
- /* handles 8 bytes */
- tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
- tpm_u32(HR_NV_INDEX + index), /* Password authorisation */
- /* AUTH_SESSION */
- tpm_u32(9), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(0), /* Size of <hmac/password> */
- /* <hmac/password> (if any) */
- tpm_u16(count), /* Number of bytes */
- tpm_u16(0), /* Offset */
- };
- size_t response_len = COMMAND_BUFFER_SIZE;
- u8 response[COMMAND_BUFFER_SIZE];
- int ret;
- u16 tag;
- u32 size, code;
- ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
- if (ret)
- return log_msg_ret("read", ret);
- if (unpack_byte_string(response, response_len, "wdds",
- 0, &tag, 2, &size, 6, &code,
- 16, data, count))
- return TPM_LIB_ERROR;
- return 0;
- }
- u32 tpm2_nv_write_value(struct udevice *dev, u32 index, const void *data,
- u32 count)
- {
- struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
- uint offset = 10 + 8 + 4 + 9 + 2;
- uint len = offset + count + 2;
- /* Use empty password auth if platform hierarchy is disabled */
- u32 auth = priv->plat_hier_disabled ? HR_NV_INDEX + index :
- TPM2_RH_PLATFORM;
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- /* header 10 bytes */
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(len), /* Length */
- tpm_u32(TPM2_CC_NV_WRITE), /* Command code */
- /* handles 8 bytes */
- tpm_u32(auth), /* Primary platform seed */
- tpm_u32(HR_NV_INDEX + index), /* Password authorisation */
- /* AUTH_SESSION */
- tpm_u32(9), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(0), /* Size of <hmac/password> */
- /* <hmac/password> (if any) */
- tpm_u16(count),
- };
- size_t response_len = COMMAND_BUFFER_SIZE;
- u8 response[COMMAND_BUFFER_SIZE];
- int ret;
- ret = pack_byte_string(command_v2, sizeof(command_v2), "sw",
- offset, data, count,
- offset + count, 0);
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, response, &response_len);
- }
- u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
- void *data, unsigned int *updates)
- {
- u8 idx_array_sz = max(idx_min_sz, DIV_ROUND_UP(idx, 8));
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_NO_SESSIONS), /* TAG */
- tpm_u32(17 + idx_array_sz), /* Length */
- tpm_u32(TPM2_CC_PCR_READ), /* Command code */
- /* TPML_PCR_SELECTION */
- tpm_u32(1), /* Number of selections */
- tpm_u16(TPM2_ALG_SHA256), /* Algorithm of the hash */
- idx_array_sz, /* Array size for selection */
- /* bitmap(idx) Selected PCR bitmap */
- };
- size_t response_len = COMMAND_BUFFER_SIZE;
- u8 response[COMMAND_BUFFER_SIZE];
- unsigned int pcr_sel_idx = idx / 8;
- u8 pcr_sel_bit = BIT(idx % 8);
- unsigned int counter = 0;
- int ret;
- if (pack_byte_string(command_v2, COMMAND_BUFFER_SIZE, "b",
- 17 + pcr_sel_idx, pcr_sel_bit))
- return TPM_LIB_ERROR;
- ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
- if (ret)
- return ret;
- if (unpack_byte_string(response, response_len, "ds",
- 10, &counter,
- response_len - TPM2_DIGEST_LEN, data,
- TPM2_DIGEST_LEN))
- return TPM_LIB_ERROR;
- if (updates)
- *updates = counter;
- return 0;
- }
- u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
- void *buf, size_t prop_count)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_NO_SESSIONS), /* TAG */
- tpm_u32(22), /* Length */
- tpm_u32(TPM2_CC_GET_CAPABILITY), /* Command code */
- tpm_u32(capability), /* Capability */
- tpm_u32(property), /* Property */
- tpm_u32(prop_count), /* Property count */
- };
- u8 response[COMMAND_BUFFER_SIZE];
- size_t response_len = COMMAND_BUFFER_SIZE;
- unsigned int properties_off;
- int ret;
- ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
- if (ret)
- return ret;
- /*
- * In the response buffer, the properties are located after the:
- * tag (u16), response size (u32), response code (u32),
- * YES/NO flag (u8), TPM_CAP (u32).
- */
- properties_off = sizeof(u16) + sizeof(u32) + sizeof(u32) +
- sizeof(u8) + sizeof(u32);
- memcpy(buf, &response[properties_off], response_len - properties_off);
- return 0;
- }
- u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(27 + pw_sz), /* Length */
- tpm_u32(TPM2_CC_DAM_RESET), /* Command code */
- /* HANDLE */
- tpm_u32(TPM2_RH_LOCKOUT), /* TPM resource handle */
- /* AUTH_SESSION */
- tpm_u32(9 + pw_sz), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(pw_sz), /* Size of <hmac/password> */
- /* STRING(pw) <hmac/password> (if any) */
- };
- unsigned int offset = 27;
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the password (if any)
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "s",
- offset, pw, pw_sz);
- offset += pw_sz;
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
- const ssize_t pw_sz, unsigned int max_tries,
- unsigned int recovery_time,
- unsigned int lockout_recovery)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(27 + pw_sz + 12), /* Length */
- tpm_u32(TPM2_CC_DAM_PARAMETERS), /* Command code */
- /* HANDLE */
- tpm_u32(TPM2_RH_LOCKOUT), /* TPM resource handle */
- /* AUTH_SESSION */
- tpm_u32(9 + pw_sz), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(pw_sz), /* Size of <hmac/password> */
- /* STRING(pw) <hmac/password> (if any) */
- /* LOCKOUT PARAMETERS */
- /* tpm_u32(max_tries) Max tries (0, always lock) */
- /* tpm_u32(recovery_time) Recovery time (0, no lock) */
- /* tpm_u32(lockout_recovery) Lockout recovery */
- };
- unsigned int offset = 27;
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the password (if any)
- * - max tries
- * - recovery time
- * - lockout recovery
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "sddd",
- offset, pw, pw_sz,
- offset + pw_sz, max_tries,
- offset + pw_sz + 4, recovery_time,
- offset + pw_sz + 8, lockout_recovery);
- offset += pw_sz + 12;
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
- const ssize_t newpw_sz, const char *oldpw,
- const ssize_t oldpw_sz)
- {
- unsigned int offset = 27;
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(offset + oldpw_sz + 2 + newpw_sz), /* Length */
- tpm_u32(TPM2_CC_HIERCHANGEAUTH), /* Command code */
- /* HANDLE */
- tpm_u32(handle), /* TPM resource handle */
- /* AUTH_SESSION */
- tpm_u32(9 + oldpw_sz), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* Session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(oldpw_sz) /* Size of <hmac/password> */
- /* STRING(oldpw) <hmac/password> (if any) */
- /* TPM2B_AUTH (TPM2B_DIGEST) */
- /* tpm_u16(newpw_sz) Digest size, new pw length */
- /* STRING(newpw) Digest buffer, new pw */
- };
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the old password (if any)
- * - size of the new password
- * - new password
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "sws",
- offset, oldpw, oldpw_sz,
- offset + oldpw_sz, newpw_sz,
- offset + oldpw_sz + 2, newpw, newpw_sz);
- offset += oldpw_sz + 2 + newpw_sz;
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
- const ssize_t pw_sz, u32 index, const char *key)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(35 + pw_sz + TPM2_DIGEST_LEN), /* Length */
- tpm_u32(TPM2_CC_PCR_SETAUTHPOL), /* Command code */
- /* HANDLE */
- tpm_u32(TPM2_RH_PLATFORM), /* TPM resource handle */
- /* AUTH_SESSION */
- tpm_u32(9 + pw_sz), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(pw_sz) /* Size of <hmac/password> */
- /* STRING(pw) <hmac/password> (if any) */
- /* TPM2B_AUTH (TPM2B_DIGEST) */
- /* tpm_u16(TPM2_DIGEST_LEN) Digest size length */
- /* STRING(key) Digest buffer (PCR key) */
- /* TPMI_ALG_HASH */
- /* tpm_u16(TPM2_ALG_SHA256) Algorithm of the hash */
- /* TPMI_DH_PCR */
- /* tpm_u32(index), PCR Index */
- };
- unsigned int offset = 27;
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the password (if any)
- * - the PCR key length
- * - the PCR key
- * - the hash algorithm
- * - the PCR index
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "swswd",
- offset, pw, pw_sz,
- offset + pw_sz, TPM2_DIGEST_LEN,
- offset + pw_sz + 2, key, TPM2_DIGEST_LEN,
- offset + pw_sz + 2 + TPM2_DIGEST_LEN,
- TPM2_ALG_SHA256,
- offset + pw_sz + 4 + TPM2_DIGEST_LEN, index);
- offset += pw_sz + 2 + TPM2_DIGEST_LEN + 2 + 4;
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
- const ssize_t pw_sz, u32 index, const char *key,
- const ssize_t key_sz)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(33 + pw_sz + TPM2_DIGEST_LEN), /* Length */
- tpm_u32(TPM2_CC_PCR_SETAUTHVAL), /* Command code */
- /* HANDLE */
- tpm_u32(index), /* Handle (PCR Index) */
- /* AUTH_SESSION */
- tpm_u32(9 + pw_sz), /* Authorization size */
- tpm_u32(TPM2_RS_PW), /* session handle */
- tpm_u16(0), /* Size of <nonce> */
- /* <nonce> (if any) */
- 0, /* Attributes: Cont/Excl/Rst */
- tpm_u16(pw_sz), /* Size of <hmac/password> */
- /* STRING(pw) <hmac/password> (if any) */
- /* TPM2B_DIGEST */
- /* tpm_u16(key_sz) Key length */
- /* STRING(key) Key */
- };
- unsigned int offset = 27;
- int ret;
- /*
- * Fill the command structure starting from the first buffer:
- * - the password (if any)
- * - the number of digests, 1 in our case
- * - the algorithm, sha256 in our case
- * - the digest (64 bytes)
- */
- ret = pack_byte_string(command_v2, sizeof(command_v2), "sws",
- offset, pw, pw_sz,
- offset + pw_sz, key_sz,
- offset + pw_sz + 2, key, key_sz);
- offset += pw_sz + 2 + key_sz;
- if (ret)
- return TPM_LIB_ERROR;
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_get_random(struct udevice *dev, void *data, u32 count)
- {
- const u8 command_v2[10] = {
- tpm_u16(TPM2_ST_NO_SESSIONS),
- tpm_u32(12),
- tpm_u32(TPM2_CC_GET_RANDOM),
- };
- u8 buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE];
- const size_t data_size_offset = 10;
- const size_t data_offset = 12;
- size_t response_length = sizeof(response);
- u32 data_size;
- u8 *out = data;
- while (count > 0) {
- u32 this_bytes = min((size_t)count,
- sizeof(response) - data_offset);
- u32 err;
- if (pack_byte_string(buf, sizeof(buf), "sw",
- 0, command_v2, sizeof(command_v2),
- sizeof(command_v2), this_bytes))
- return TPM_LIB_ERROR;
- err = tpm_sendrecv_command(dev, buf, response,
- &response_length);
- if (err)
- return err;
- if (unpack_byte_string(response, response_length, "w",
- data_size_offset, &data_size))
- return TPM_LIB_ERROR;
- if (data_size > this_bytes)
- return TPM_LIB_ERROR;
- if (unpack_byte_string(response, response_length, "s",
- data_offset, out, data_size))
- return TPM_LIB_ERROR;
- count -= data_size;
- out += data_size;
- }
- return 0;
- }
- u32 tpm2_write_lock(struct udevice *dev, u32 index)
- {
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- /* header 10 bytes */
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(10 + 8 + 13), /* Length */
- tpm_u32(TPM2_CC_NV_WRITELOCK), /* Command code */
- /* handles 8 bytes */
- tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
- tpm_u32(HR_NV_INDEX + index), /* Password authorisation */
- /* session header 9 bytes */
- tpm_u32(9), /* Header size */
- tpm_u32(TPM2_RS_PW), /* Password authorisation */
- tpm_u16(0), /* nonce_size */
- 0, /* session_attrs */
- tpm_u16(0), /* auth_size */
- };
- return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- }
- u32 tpm2_disable_platform_hierarchy(struct udevice *dev)
- {
- struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
- u8 command_v2[COMMAND_BUFFER_SIZE] = {
- /* header 10 bytes */
- tpm_u16(TPM2_ST_SESSIONS), /* TAG */
- tpm_u32(10 + 4 + 13 + 5), /* Length */
- tpm_u32(TPM2_CC_HIER_CONTROL), /* Command code */
- /* 4 bytes */
- tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
- /* session header 9 bytes */
- tpm_u32(9), /* Header size */
- tpm_u32(TPM2_RS_PW), /* Password authorisation */
- tpm_u16(0), /* nonce_size */
- 0, /* session_attrs */
- tpm_u16(0), /* auth_size */
- /* payload 5 bytes */
- tpm_u32(TPM2_RH_PLATFORM), /* Hierarchy to disable */
- 0, /* 0=disable */
- };
- int ret;
- ret = tpm_sendrecv_command(dev, command_v2, NULL, NULL);
- log_info("ret=%s, %x\n", dev->name, ret);
- if (ret)
- return ret;
- priv->plat_hier_disabled = true;
- return 0;
- }
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