powerpc: handle irq_enter/irq_exit in interrupt handler wrappers

Move irq_enter/irq_exit into asynchronous interrupt handler wrappers.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-35-npiggin@gmail.com

arch/powerpc/include/asm/interrupt.h

@@ -43,10 +43,12 @@ static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt
 static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
 {
 	interrupt_enter_prepare(regs, state);
+	irq_enter();
 }
 
 static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
 {
+	irq_exit();
 	interrupt_exit_prepare(regs, state);
 }
 

arch/powerpc/kernel/dbell.c

@@ -23,7 +23,6 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(doorbell_exception)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
-	irq_enter();
 	trace_doorbell_entry(regs);
 
 	ppc_msgsync();
@@ -36,7 +35,7 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(doorbell_exception)
 	smp_ipi_demux_relaxed(); /* already performed the barrier */
 
 	trace_doorbell_exit(regs);
-	irq_exit();
+
 	set_irq_regs(old_regs);
 }
 #else /* CONFIG_SMP */

arch/powerpc/kernel/irq.c

@@ -641,8 +641,6 @@ void __do_irq(struct pt_regs *regs)
 {
 	unsigned int irq;
 
-	irq_enter();
-
 	trace_irq_entry(regs);
 
 	/*
@@ -662,8 +660,6 @@ void __do_irq(struct pt_regs *regs)
 		generic_handle_irq(irq);
 
 	trace_irq_exit(regs);
-
-	irq_exit();
 }
 
 DEFINE_INTERRUPT_HANDLER_ASYNC(do_IRQ)

arch/powerpc/kernel/tau_6xx.c

@@ -105,12 +105,9 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(TAUException)
 {
 	int cpu = smp_processor_id();
 
-	irq_enter();
 	tau[cpu].interrupts++;
 
 	TAUupdate(cpu);
-
-	irq_exit();
 }
 #endif /* CONFIG_TAU_INT */
 

arch/powerpc/kernel/time.c

@@ -611,7 +611,7 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(timer_interrupt)
 #endif
 
 	old_regs = set_irq_regs(regs);
-	irq_enter();
+
 	trace_timer_interrupt_entry(regs);
 
 	if (test_irq_work_pending()) {
@@ -636,7 +636,7 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(timer_interrupt)
 	}
 
 	trace_timer_interrupt_exit(regs);
-	irq_exit();
+
 	set_irq_regs(old_regs);
 }
 EXPORT_SYMBOL(timer_interrupt);

arch/powerpc/kernel/traps.c

@@ -801,7 +801,9 @@ void die_mce(const char *str, struct pt_regs *regs, long err)
 	 * do_exit() checks for in_interrupt() and panics in that case, so
 	 * exit the irq/nmi before calling die.
 	 */
-	if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64))
+	if (IS_ENABLED(CONFIG_PPC_BOOK3S_64))
+		irq_exit();
+	else
 		nmi_exit();
 	die(str, regs, err);
 }
@@ -1061,7 +1063,6 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(handle_hmi_exception)
 	struct pt_regs *old_regs;
 
 	old_regs = set_irq_regs(regs);
-	irq_enter();
 
 #ifdef CONFIG_VSX
 	/* Real mode flagged P9 special emu is needed */
@@ -1081,7 +1082,6 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(handle_hmi_exception)
 	if (ppc_md.handle_hmi_exception)
 		ppc_md.handle_hmi_exception(regs);
 
-	irq_exit();
 	set_irq_regs(old_regs);
 }
 
@@ -1907,13 +1907,9 @@ DEFINE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi)
 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
 DEFINE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async)
 {
-	irq_enter();
-
 	__this_cpu_inc(irq_stat.pmu_irqs);
 
 	perf_irq(regs);
-
-	irq_exit();
 }
 
 DEFINE_INTERRUPT_HANDLER_RAW(performance_monitor_exception)