@@ -9,6 +9,7 @@
#include <asm/arch_gicv3.h>
#include <asm/cpufeature.h>
+#include <asm/ptrace.h>
#define DAIF_PROCCTX 0
#define DAIF_PROCCTX_NOIRQ PSR_I_BIT
@@ -109,4 +110,19 @@ static inline void local_daif_restore(unsigned long flags)
trace_hardirqs_off();
}
+/*
+ * Called by synchronous exception handlers to restore the DAIF bits that were
+ * modified by taking an exception.
+ */
+static inline void local_daif_inherit(struct pt_regs *regs)
+{
+ unsigned long flags = regs->pstate & DAIF_MASK;
+
+ /*
+ * We can't use local_daif_restore(regs->pstate) here as
+ * system_has_prio_mask_debugging() won't restore the I bit if it can
+ * use the pmr instead.
+ */
+ write_sysreg(flags, daif);
+}
#endif