diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 927088b2c3d3f2..4483b61a428b11 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -211,4 +211,14 @@ config TCG_FTPM_TEE
 	  This driver proxies for firmware TPM running in TEE.
 
 source "drivers/char/tpm/st33zp24/Kconfig"
+
+config TCG_TPM_RESTRICT_PCR
+	bool "Restrict userland access to PCR 23"
+	depends on TCG_TPM
+	help
+	  If set, block userland from extending or resetting PCR 23. This
+	  allows it to be restricted to in-kernel use, preventing userland
+	  from being able to make use of data sealed to the TPM by the kernel.
+	  This is required for secure hibernation support, but should be left
+	  disabled if any userland may require access to PCR23.
 endif # TCG_TPM
diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c
index dc4c0a0a512903..7a4e618c7d1942 100644
--- a/drivers/char/tpm/tpm-dev-common.c
+++ b/drivers/char/tpm/tpm-dev-common.c
@@ -198,6 +198,14 @@ ssize_t tpm_common_write(struct file *file, const char __user *buf,
 	priv->response_read = false;
 	*off = 0;
 
+	if (priv->chip->flags & TPM_CHIP_FLAG_TPM2)
+		ret = tpm2_cmd_restricted(priv->chip, priv->data_buffer, size);
+	else
+		ret = tpm1_cmd_restricted(priv->chip, priv->data_buffer, size);
+
+	if (ret)
+		goto out;
+
 	/*
 	 * If in nonblocking mode schedule an async job to send
 	 * the command return the size.
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index a80b341d38eb8c..077c3ca0a127ba 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -229,6 +229,8 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
 unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
 int tpm2_probe(struct tpm_chip *chip);
 int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip);
+int tpm_find_and_validate_cc(struct tpm_chip *chip, struct tpm_space *space,
+			     const void *buf, size_t bufsiz);
 int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
 int tpm2_init_space(struct tpm_space *space, unsigned int buf_size);
 void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
@@ -244,4 +246,23 @@ void tpm_bios_log_setup(struct tpm_chip *chip);
 void tpm_bios_log_teardown(struct tpm_chip *chip);
 int tpm_dev_common_init(void);
 void tpm_dev_common_exit(void);
+
+#ifdef CONFIG_TCG_TPM_RESTRICT_PCR
+#define TPM_RESTRICTED_PCR 23
+
+int tpm1_cmd_restricted(struct tpm_chip *chip, u8 *buffer, size_t size);
+int tpm2_cmd_restricted(struct tpm_chip *chip, u8 *buffer, size_t size);
+#else
+static inline int tpm1_cmd_restricted(struct tpm_chip *chip, u8 *buffer,
+				      size_t size)
+{
+	return 0;
+}
+
+static inline int tpm2_cmd_restricted(struct tpm_chip *chip, u8 *buffer,
+				      size_t size)
+{
+	return 0;
+}
+#endif
 #endif
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index 8ec743dec26544..318e75ae42fb85 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -845,3 +845,38 @@ int tpm1_get_pcr_allocation(struct tpm_chip *chip)
 
 	return 0;
 }
+
+#ifdef CONFIG_TCG_TPM_RESTRICT_PCR
+int tpm1_cmd_restricted(struct tpm_chip *chip, u8 *buffer, size_t size)
+{
+	struct tpm_header *header = (struct tpm_header *)buffer;
+	char len, offset;
+	__be32 *pcr;
+	int pos;
+
+	switch (be32_to_cpu(header->ordinal)) {
+	case TPM_ORD_PCR_EXTEND:
+		if (size < (TPM_HEADER_SIZE + sizeof(u32)))
+			return -EINVAL;
+		pcr = (__be32 *)&buffer[TPM_HEADER_SIZE];
+		if (be32_to_cpu(*pcr) == TPM_RESTRICTED_PCR)
+			return -EPERM;
+		break;
+	case TPM_ORD_PCR_RESET:
+		if (size < (TPM_HEADER_SIZE + 1))
+			return -EINVAL;
+		len = buffer[TPM_HEADER_SIZE];
+		if (size < (TPM_HEADER_SIZE + 1 + len))
+			return -EINVAL;
+		offset = TPM_RESTRICTED_PCR/3;
+		if (len < offset)
+			break;
+		pos = TPM_HEADER_SIZE + 1 + offset;
+		if (buffer[pos] & (1 << (TPM_RESTRICTED_PCR - 2 * offset)))
+			return -EPERM;
+		break;
+	}
+
+	return 0;
+}
+#endif
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 69126a6770386e..dbf7f5552c6782 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -821,3 +821,25 @@ int tpm2_find_cc(struct tpm_chip *chip, u32 cc)
 
 	return -1;
 }
+
+#ifdef CONFIG_TCG_TPM_RESTRICT_PCR
+int tpm2_cmd_restricted(struct tpm_chip *chip, u8 *buffer, size_t size)
+{
+	int cc = tpm_find_and_validate_cc(chip, NULL, buffer, size);
+	__be32 *handle;
+
+	switch (cc) {
+	case TPM2_CC_PCR_EXTEND:
+	case TPM2_CC_PCR_RESET:
+		if (size < (TPM_HEADER_SIZE + sizeof(u32)))
+			return -EINVAL;
+
+		handle = (__be32 *)&buffer[TPM_HEADER_SIZE];
+		if (be32_to_cpu(*handle) == TPM_RESTRICTED_PCR)
+			return -EPERM;
+		break;
+	}
+
+	return 0;
+}
+#endif
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index ffb35f0154c16c..6f51cd92c6400f 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -262,7 +262,7 @@ static int tpm2_map_command(struct tpm_chip *chip, u32 cc, u8 *cmd)
 	return 0;
 }
 
-static int tpm_find_and_validate_cc(struct tpm_chip *chip,
+int tpm_find_and_validate_cc(struct tpm_chip *chip,
 				    struct tpm_space *space,
 				    const void *cmd, size_t len)
 {
