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Diffstat (limited to 'arch/arm/include/asm/system_misc.h')
-rw-r--r--arch/arm/include/asm/system_misc.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/include/asm/system_misc.h b/arch/arm/include/asm/system_misc.h
index 78f6db114faf..8e76db83c498 100644
--- a/arch/arm/include/asm/system_misc.h
+++ b/arch/arm/include/asm/system_misc.h
@@ -8,6 +8,7 @@
#include <linux/linkage.h>
#include <linux/irqflags.h>
#include <linux/reboot.h>
+#include <linux/percpu.h>
extern void cpu_init(void);
@@ -15,6 +16,20 @@ void soft_restart(unsigned long);
extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);
extern void (*arm_pm_idle)(void);
+#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
+typedef void (*harden_branch_predictor_fn_t)(void);
+DECLARE_PER_CPU(harden_branch_predictor_fn_t, harden_branch_predictor_fn);
+static inline void harden_branch_predictor(void)
+{
+ harden_branch_predictor_fn_t fn = per_cpu(harden_branch_predictor_fn,
+ smp_processor_id());
+ if (fn)
+ fn();
+}
+#else
+#define harden_branch_predictor() do { } while (0)
+#endif
+
#define UDBG_UNDEFINED (1 << 0)
#define UDBG_SYSCALL (1 << 1)
#define UDBG_BADABORT (1 << 2)