powerpc/64/interrupt: reduce expensive debug tests

Move the assertions requiring restart table searches under
CONFIG_PPC_IRQ_SOFT_MASK_DEBUG.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210922145452.352571-6-npiggin@gmail.com

diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index aa65bb7..fc28f46 100644 (file)
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -97,6 +97,11 @@ static inline void srr_regs_clobbered(void)
        local_paca->hsrr_valid = 0;
 }
 #else
+static inline unsigned long search_kernel_restart_table(unsigned long addr)
+{
+       return 0;
+}
+
 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
 {
        return false;
@@ -193,13 +198,14 @@ static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrup
                 */
                if (TRAP(regs) != INTERRUPT_PROGRAM) {
                        CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
-                       BUG_ON(is_implicit_soft_masked(regs));
+                       if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
+                               BUG_ON(is_implicit_soft_masked(regs));
                }
-#ifdef CONFIG_PPC_BOOK3S
+
                /* Move this under a debugging check */
-               if (arch_irq_disabled_regs(regs))
+               if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) &&
+                               arch_irq_disabled_regs(regs))
                        BUG_ON(search_kernel_restart_table(regs->nip));
-#endif
        }
        if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
                BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));