Enable MTE support unilaterally for Normal World
This patch enables MTE for Normal world if the CPU suppors it. Enabling
MTE for secure world will be done later.
Change-Id: I9ef64460beaba15e9a9c20ab02da4fb2208b6f7d
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/lib/el3_runtime/aarch64/context_mgmt.c b/lib/el3_runtime/aarch64/context_mgmt.c
index 89d7ed6..05ba5ed 100644
--- a/lib/el3_runtime/aarch64/context_mgmt.c
+++ b/lib/el3_runtime/aarch64/context_mgmt.c
@@ -12,6 +12,7 @@
#include <arch.h>
#include <arch_helpers.h>
+#include <arch_features.h>
#include <bl31/interrupt_mgmt.h>
#include <common/bl_common.h>
#include <context.h>
@@ -136,6 +137,18 @@
scr_el3 |= SCR_API_BIT | SCR_APK_BIT;
#endif /* !CTX_INCLUDE_PAUTH_REGS */
+ unsigned int mte = get_armv8_5_mte_support();
+
+ /*
+ * Enable MTE support unilaterally for normal world if the CPU supports
+ * it.
+ */
+ if (mte != MTE_UNIMPLEMENTED) {
+ if (security_state == NON_SECURE) {
+ scr_el3 |= SCR_ATA_BIT;
+ }
+ }
+
#ifdef IMAGE_BL31
/*
* SCR_EL3.IRQ, SCR_EL3.FIQ: Enable the physical FIQ and IRQ routing as