diff options
| author | Simon Glass <sjg@chromium.org> | 2022-08-30 21:05:38 -0600 |
|---|---|---|
| committer | Ilias Apalodimas <ilias.apalodimas@linaro.org> | 2022-09-03 16:59:05 +0300 |
| commit | 5208ed187cb6314dc64657802e8e5bb5a5e3a7fb (patch) | |
| tree | 6954b55d47f5b86d6cc4d3d6ac9bfc7d79187523 /lib | |
| parent | 4c57ec76b7254cf1743748b70239bddf6100237a (diff) | |
tpm: Allow committing non-volatile data
Add an option to tell the TPM to commit non-volatile data immediately it
is changed, rather than waiting until later. This is needed in some
situations, since if the device reboots it may not write the data.
Add definitions for the rest of the Cr50 commands while we are here.
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 'lib')
| -rw-r--r-- | lib/tpm-v2.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c index edee9854a7..697b982e07 100644 --- a/lib/tpm-v2.c +++ b/lib/tpm-v2.c @@ -704,3 +704,24 @@ u32 tpm2_report_state(struct udevice *dev, uint vendor_cmd, uint vendor_subcmd, return 0; } + +u32 tpm2_enable_nvcommits(struct udevice *dev, uint vendor_cmd, + uint vendor_subcmd) +{ + u8 command_v2[COMMAND_BUFFER_SIZE] = { + /* header 10 bytes */ + tpm_u16(TPM2_ST_NO_SESSIONS), /* TAG */ + tpm_u32(10 + 2), /* Length */ + tpm_u32(vendor_cmd), /* Command code */ + + tpm_u16(vendor_subcmd), + }; + int ret; + + ret = tpm_sendrecv_command(dev, command_v2, NULL, NULL); + log_debug("ret=%s, %x\n", dev->name, ret); + if (ret) + return ret; + + return 0; +} |