On 08/14/2018 06:02 AM, Marc-André Lureau wrote:

--- a/docs/specs/tpm.txt
+++ b/docs/specs/tpm.txt
@@ -121,6 +121,8 @@ layout:
   +----------+--------+--------+-------------------------------------------+
   | next_step|   0x1  |  0x159 | Operation to execute after reboot by      |
   |          |        |        | firmware. Used by firmware.               |
+ +----------+--------+--------+-------------------------------------------+
+ | movv     |   0x1  |  0x200 | Memory overwrite variable                 |
   +----------+--------+--------+-------------------------------------------+
why 0x200 and not 0x15a ?

I thought it would be better to leave some room for PPI, but that
probably doesn't help much. Let's move it to 0x15a.

Btw why TPM_PPI_ADDR_SIZE is 0x400 and excess bytes aren't documented anywhere?
I guess for the same reason, Stefan wanted to have some room for
future changes. Is that a problem?

Stefan, can you confirm?
Yes, this was the primary reason.

   Stefan


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