commit c37eee72b63e465db767cd9cc784ec13c313d37f
author Mark Brown <broonie@kernel.org> Tue Mar 14 20:13:03 2023 +0000
committer Mark Brown <broonie@kernel.org> Thu Mar 16 16:45:31 2023 +0000
tree 9a61175c48c3511fcf8e4ac10f5d4cc2d180b1af
parent 746a339c8e2ef5e65aa50c9ca1f22ac5e3b1987d

feat(tcr2): support FEAT_TCR2

Arm v8.9 introduces FEAT_TCR2, adding extended translation control
registers. Support this, context switching TCR2_EL2 and disabling
traps so lower ELs can access the new registers.

Change the FVP platform to default to handling this as a dynamic option so
the right decision can be made by the code at runtime.

Signed-off-by: Mark Brown <broonie@kernel.org>
Change-Id: I297452acd8646d58bac64fc15e05b06a543e5148

make_helpers/defaults.mk

diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index a66123a..cf1c215 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -176,6 +176,9 @@
 # Flag to enable delayed trapping of WFE instruction (FEAT_TWED)
 ENABLE_FEAT_TWED		:= 0
 
+# Flag to enable access to TCR2 (FEAT_TCR2)
+ENABLE_FEAT_TCR2		:= 0
+
 # By default BL31 encryption disabled
 ENCRYPT_BL31			:= 0