refactor(juno): disable non-invasive debug of secure state
Disable non-invasive debug of secure state for Juno
in release builds. This makes sure that PMU counts
only Non-secure events.
Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I0d1c3f96f3b4e48360a7211ae55851d65d291025
diff --git a/plat/arm/board/juno/juno_security.c b/plat/arm/board/juno/juno_security.c
index 1e64c02..654a7f1 100644
--- a/plat/arm/board/juno/juno_security.c
+++ b/plat/arm/board/juno/juno_security.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -115,6 +115,14 @@
/* Drive SPIDEN LOW to disable invasive debug of secure state. */
mmio_write_32(SSC_REG_BASE + SSC_DBGCFG_CLR,
1U << SPIDEN_INT_CLR_SHIFT);
+
+ /* Set internal drive selection for SPNIDEN. */
+ mmio_write_32(SSC_REG_BASE + SSC_DBGCFG_SET,
+ 1U << SPNIDEN_SEL_SET_SHIFT);
+
+ /* Drive SPNIDEN LOW to disable non-invasive debug of secure state. */
+ mmio_write_32(SSC_REG_BASE + SSC_DBGCFG_CLR,
+ 1U << SPNIDEN_INT_CLR_SHIFT);
#endif
}