Commit 9aa36b39 authored by Jarkko Sakkinen's avatar Jarkko Sakkinen
Browse files

tpm: export tpm2_flush_context_cmd 



Signed-off-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent a147918e

drivers/char/tpm/tpm.h

+2 −0
Original line number Diff line number Diff line
@@ -541,6 +541,8 @@ 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, u32 count,

		    struct tpm2_digest *digests);

int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);

void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,

			    unsigned int flags);

int tpm2_seal_trusted(struct tpm_chip *chip,

		      struct trusted_key_payload *payload,

		      struct trusted_key_options *options);

drivers/char/tpm/tpm2-cmd.c

+29 −33
Original line number Diff line number Diff line
@@ -418,6 +418,35 @@ static const struct tpm_input_header tpm2_get_tpm_pt_header = { 
	.ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY)

};



/**

 * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command

 * @chip: TPM chip to use

 * @payload: the key data in clear and encrypted form

 * @options: authentication values and other options

 *

 * Return: same as with tpm_transmit_cmd

 */

void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,

			    unsigned int flags)

{

	struct tpm_buf buf;

	int rc;



	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);

	if (rc) {

		dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n",

			 handle);

		return;

	}



	tpm_buf_append_u32(&buf, handle);



	(void) tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags,

				"flushing context");



	tpm_buf_destroy(&buf);

}



/**

 * tpm_buf_append_auth() - append TPMS_AUTH_COMMAND to the buffer.

 *
@@ -627,39 +656,6 @@ out: 
	return rc;

}



/**

 * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command

 *

 * @chip: TPM chip to use

 * @handle: the key data in clear and encrypted form

 * @flags: tpm transmit flags

 *

 * Return: Same as with tpm_transmit_cmd.

 */

static void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,

				   unsigned int flags)

{

	struct tpm_buf buf;

	int rc;



	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);

	if (rc) {

		dev_warn(&chip->dev, "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, 0, flags,

			      "flushing context");

	if (rc)

		dev_warn(&chip->dev, "0x%08x was not flushed, rc=%d\n", handle,

			 rc);



	tpm_buf_destroy(&buf);

}



/**

 * tpm2_unseal_cmd() - execute a TPM2_Unload command

 *