[PATCH v3 02/11] tpm: Export and rename tpm2_find_and_validate_cc()

Evan Green
2022-09-27T16:50:24Z

Export tpm_find_and_validate_cc() since it will be needed by an upcoming
change allowing access to certain PCRs to be restricted to the kernel.
In order to export it consistently, and because it's a tpm2-only
function, rename it to tpm2_find_and_validate_cc().

Signed-off-by: Evan Green <evgreen@chromium.org>

---

Changes in v3:
- Split find_and_validate_cc() export to its own patch (Jarkko)
- Rename tpm_find_and_validate_cc() to tpm2_find_and_validate_cc().

drivers/char/tpm/tpm.h | 3 +++
drivers/char/tpm/tpm2-space.c | 8 ++++----
2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 34e20b3192f833..9c9e5d75b37c78 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -232,6 +232,9 @@ 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);
void tpm2_flush_space(struct tpm_chip *chip);
+int tpm2_find_and_validate_cc(struct tpm_chip *chip,
+ struct tpm_space *space,
+ const void *cmd, size_t len);
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,
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index ffb35f0154c16c..ca34cc006e7f8d 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -262,9 +262,9 @@ 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,
- struct tpm_space *space,
- const void *cmd, size_t len)
+int tpm2_find_and_validate_cc(struct tpm_chip *chip,
+ struct tpm_space *space,
+ const void *cmd, size_t len)
{
const struct tpm_header *header = (const void *)cmd;
int i;
@@ -306,7 +306,7 @@ int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,
if (!space)
return 0;

- cc = tpm_find_and_validate_cc(chip, space, cmd, cmdsiz);
+ cc = tpm2_find_and_validate_cc(chip, space, cmd, cmdsiz);
if (cc < 0)
return cc;

--
2.31.0