[PATCH 2/2] optee: add property no-map to secure reserved memory

Patrice Chotard patrice.chotard at st.com
Thu Aug 13 11:46:58 CEST 2020

From: Etienne Carriere <etienne.carriere at st.com>

OP-TEE reserved memory node must set property "no-map" to prevent
Linux kernel from mapping secure memory unless what non-secure world
speculative accesses of the CPU can violate the memory firmware

Fixes: 6ccb05eae01b ("image: fdt: copy possible optee nodes to a loaded devicetree")
Signed-off-by: Etienne Carriere <etienne.carriere at st.com>
Signed-off-by: Patrice Chotard <patrice.chotard at st.com>

 lib/optee/optee.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/optee/optee.c b/lib/optee/optee.c
index 963c2ff430..9e6606568f 100644
--- a/lib/optee/optee.c
+++ b/lib/optee/optee.c
@@ -192,7 +192,7 @@ int optee_copy_fdt_nodes(const void *old_blob, void *new_blob)
 				ret = fdtdec_add_reserved_memory(new_blob,
-								 NULL, false);
+								 NULL, true);
 				if (ret < 0)

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