Tegra194: mce: enable strict checking
"Strict checking" is a mode where secure world can access
secure-only areas unlike legacy mode where secure world could
access non-secure spaces as well. Secure-only areas are defined
as the TZ-DRAM carveout and any GSC with the CPU_SECURE bit set.
This mode not only helps prevent issues with IO-Coherency but aids
with security as well.
This patch implements the programming sequence required to enable
strict checking mode for Tegra194 SoCs.
Change-Id: Ic2e594f79ec7c5bc1339b509e67c4c62efb9d0c0
Signed-off-by: Dilan Lee <dilee@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t194/plat_setup.c b/plat/nvidia/tegra/soc/t194/plat_setup.c
index 4b6ec8e..278dabe 100644
--- a/plat/nvidia/tegra/soc/t194/plat_setup.c
+++ b/plat/nvidia/tegra/soc/t194/plat_setup.c
@@ -19,6 +19,7 @@
#include <drivers/arm/gicv2.h>
#include <bl31/interrupt_mgmt.h>
#include <mce.h>
+#include <mce_private.h>
#include <plat/common/platform.h>
#include <tegra_def.h>
#include <tegra_mc_def.h>
@@ -257,3 +258,12 @@
return (plat_params_from_bl2_t *)(uintptr_t)val;
}
+
+void plat_late_platform_setup(void)
+{
+ /*
+ * Enable strict checking after programming the GSC for
+ * enabling TZSRAM and TZDRAM
+ */
+ mce_enable_strict_checking();
+}