diff options
| author | Simon Glass | 2022-08-30 21:05:36 -0600 |
|---|---|---|
| committer | Ilias Apalodimas | 2022-09-03 16:59:05 +0300 |
| commit | 3bb4db4c3883c66ee0bbf152e9ba1d2504fa8c9f (patch) | |
| tree | b94da976937e8039287e79b395ca9068f9f9e34f /drivers | |
| parent | 6694c997b210656fc3e6ce63ba780bc9bf97c077 (diff) | |
tpm: Allow reporting the internal state
It is useful to read information about the current TPM state, where
supported, e.g. for debugging purposes when verified boot fails.
Add support for this to the TPM interface as well as Cr50. Add a simple
sandbox test.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tpm/tpm-uclass.c | 10 | ||||
| -rw-r--r-- | drivers/tpm/tpm2_tis_sandbox.c | 11 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/tpm/tpm-uclass.c b/drivers/tpm/tpm-uclass.c index 0eb35f50c4e..5ff0cd3958c 100644 --- a/drivers/tpm/tpm-uclass.c +++ b/drivers/tpm/tpm-uclass.c @@ -49,6 +49,16 @@ int tpm_get_desc(struct udevice *dev, char *buf, int size) return ops->get_desc(dev, buf, size); } +int tpm_report_state(struct udevice *dev, char *buf, int size) +{ + struct tpm_ops *ops = tpm_get_ops(dev); + + if (!ops->report_state) + return -ENOSYS; + + return ops->report_state(dev, buf, size); +} + /* Returns max number of milliseconds to wait */ static ulong tpm_tis_i2c_calc_ordinal_duration(struct tpm_chip_priv *priv, u32 ordinal) diff --git a/drivers/tpm/tpm2_tis_sandbox.c b/drivers/tpm/tpm2_tis_sandbox.c index c26f5d35abf..dd94bdc31fb 100644 --- a/drivers/tpm/tpm2_tis_sandbox.c +++ b/drivers/tpm/tpm2_tis_sandbox.c @@ -795,6 +795,16 @@ static int sandbox_tpm2_get_desc(struct udevice *dev, char *buf, int size) return snprintf(buf, size, "Sandbox TPM2.x"); } +static int sandbox_tpm2_report_state(struct udevice *dev, char *buf, int size) +{ + struct sandbox_tpm2 *priv = dev_get_priv(dev); + + if (size < 40) + return -ENOSPC; + + return snprintf(buf, size, "init_done=%d", priv->init_done); +} + static int sandbox_tpm2_open(struct udevice *dev) { struct sandbox_tpm2 *tpm = dev_get_priv(dev); @@ -834,6 +844,7 @@ static const struct tpm_ops sandbox_tpm2_ops = { .open = sandbox_tpm2_open, .close = sandbox_tpm2_close, .get_desc = sandbox_tpm2_get_desc, + .report_state = sandbox_tpm2_report_state, .xfer = sandbox_tpm2_xfer, }; |