fix(el3_runtime): fix SVE and AMU extension enablement flags
If SVE are enabled for both Non-secure and Secure world along with AMU
extension, then it causes the TAM_BIT in CPTR_EL3 to be set upon exit
from bl31. This restricts access to the AMU register set in normal
world. This fix maintains consistency in both TAM_BIT and CPTR_EZ_BIT
by saving and restoring CPTR_EL3 register from EL3 context.
Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: Id76ce1d27ee48bed65eb32392036377716aff087
diff --git a/include/lib/extensions/amu.h b/include/lib/extensions/amu.h
index 3a70e4f..3a254c9 100644
--- a/include/lib/extensions/amu.h
+++ b/include/lib/extensions/amu.h
@@ -13,6 +13,7 @@
#include <lib/cassert.h>
#include <lib/utils_def.h>
+#include <context.h>
#include <platform_def.h>
/* All group 0 counters */
@@ -80,7 +81,11 @@
};
unsigned int amu_get_version(void);
+#if __aarch64__
+void amu_enable(bool el2_unused, cpu_context_t *ctx);
+#else
void amu_enable(bool el2_unused);
+#endif
/* Group 0 configuration helpers */
uint64_t amu_group0_cnt_read(unsigned int idx);