The TPM2 session handling code needs to save and restore a single
volatile context for the elliptic curve version of the NULL seed, so
export the APIs which do this for internal use.
Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/char/tpm/tpm.h | 4 ++++
drivers/char/tpm/tpm2-space.c | 8 ++++----
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index d942188debc9..85a7302ddfeb 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -399,6 +399,10 @@ int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,
size_t cmdsiz);
int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf,
size_t *bufsiz);
+int tpm2_save_context(struct tpm_chip *chip, u32 handle, u8 *buf,
+ unsigned int buf_size, unsigned int *offset);
+int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
+ unsigned int *offset, u32 *handle);
int tpm_bios_log_setup(struct tpm_chip *chip);
void tpm_bios_log_teardown(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index 982d341d8837..ca1cb56ccc51 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -65,8 +65,8 @@ void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space)
kfree(space->session_buf);
}
-static int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
- unsigned int *offset, u32 *handle)
+int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
+ unsigned int *offset, u32 *handle)
{
struct tpm_buf tbuf;
struct tpm2_context *ctx;
@@ -116,8 +116,8 @@ static int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
return 0;
}
-static int tpm2_save_context(struct tpm_chip *chip, u32 handle, u8 *buf,
- unsigned int buf_size, unsigned int *offset)
+int tpm2_save_context(struct tpm_chip *chip, u32 handle, u8 *buf,
+ unsigned int buf_size, unsigned int *offset)
{
struct tpm_buf tbuf;
unsigned int body_size;
--
2.16.4
