1 files changed, 4 insertions, 0 deletions
diff --git a/include/tpm_registers.h b/include/tpm_registers.h
index b82a355170..0cbcdca39d 100644
--- a/include/tpm_registers.h
+++ b/include/tpm_registers.h
@@ -91,6 +91,10 @@ struct tpm_cmd_header {
  *             TPM task how much room there is to store the response.
  *
  * Command execution result is reported in the response body.
+ *
+ * The extension command handler will consider all these commands to come from
+ * the USB interface, since the only current users for this are console
+ * commands.
  */
 void tpm_alt_extension(struct tpm_cmd_header *tpmh, size_t buffer_size);