From 3bb4db4c3883c66ee0bbf152e9ba1d2504fa8c9f Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 30 Aug 2022 21:05:36 -0600 Subject: 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 Reviewed-by: Ilias Apalodimas Signed-off-by: Ilias Apalodimas --- cmd/tpm-common.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'cmd/tpm-common.c') diff --git a/cmd/tpm-common.c b/cmd/tpm-common.c index 47adaffd1849..d0c63cadf413 100644 --- a/cmd/tpm-common.c +++ b/cmd/tpm-common.c @@ -333,6 +333,26 @@ int do_tpm_info(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) return 0; } +int do_tpm_report_state(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct udevice *dev; + char buf[80]; + int rc; + + rc = get_tpm(&dev); + if (rc) + return rc; + rc = tpm_report_state(dev, buf, sizeof(buf)); + if (rc < 0) { + printf("Couldn't get TPM state (%d)\n", rc); + return CMD_RET_FAILURE; + } + printf("%s\n", buf); + + return 0; +} + int do_tpm_init(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { struct udevice *dev; -- cgit v1.2.3