From 2d67a30ddf2bd1d7dd94653ad8a562a845c834cd Mon Sep 17 00:00:00 2001
From: Jose Marinho <jose.marinho@arm.com>
Date: Tue, 8 Jun 2021 10:16:21 +0100
Subject: [PATCH] Add rule on maximum platform boots in the Trial state.

The UEFI implementation must track the platform boots in the Trial state
and revert to the previously working bank once the maximum threshold is
crossed.
---
 source/chapter2-uefi.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/source/chapter2-uefi.rst b/source/chapter2-uefi.rst
index 20fd096..27d6d21 100644
--- a/source/chapter2-uefi.rst
+++ b/source/chapter2-uefi.rst
@@ -133,3 +133,13 @@ The FW vendor signature should be placed before the FW image as is described in
 
 The FW images should be authenticated before being written to the FW store or before being
 allowed to execute on the platform.
+
+
+
+Maximum Trial platform boots
+----------------------------
+
+The UEFI implementation must keep a count of the consecutive platform boots in
+the Trial state [FWU]_.  If the number of consecutive platform boot in the
+Trial state exceeds a platform defined value of *max_trial_boots* then the UEFI
+implementation must revert the FW to the previous working bank [FWU]_.
-- 
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