From aa643013e47b3527b819d1bbdfd1eb679daf5f27 Mon Sep 17 00:00:00 2001
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Tue, 15 May 2018 11:57:10 +0200
Subject: [PATCH] tpm: add possible traces to analyze buffers returned by the
TPM
When debugging, it is welcome to get more information about what the TPM
returns. Add the possibility to print the packets received to show their
exact content.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
---
lib/tpm-common.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/lib/tpm-common.c b/lib/tpm-common.c
index 4c2b9393c4..33fa85926c 100644
--- a/lib/tpm-common.c
+++ b/lib/tpm-common.c
@@ -153,6 +153,7 @@ u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr)
int err, ret;
u8 response_buffer[COMMAND_BUFFER_SIZE];
size_t response_length;
+ int i;
if (response) {
response_length = *size_ptr;
@@ -172,7 +173,14 @@ u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr)
if (size_ptr)
*size_ptr = response_length;
- return tpm_return_code(response);
+ ret = tpm_return_code(response);
+
+ log(LOGC_NONE, LOGL_DEBUG, "TPM response [ret:%d]: ", ret);
+ for (i = 0; i < response_length; i++)
+ log(LOGC_NONE, LOGL_DEBUG, "%02x ", ((u8 *)response)[i]);
+ log(LOGC_NONE, LOGL_DEBUG, "\n");
+
+ return ret;
}
int tpm_init(void)
--
2.39.5