LoongArch: Make arch_irq_work_has_interrupt() true only if IPI HW exist

After commit 7c405fb3279b3924 ("rcu: Use an intermediate irq_work to
start process_srcu()"), Loongson-2K0300/2K0500 fail to boot. Because
IRQ_WORK need IPI but Loongson-2K0300/2K0500 don't have IPI HW.

So make arch_irq_work_has_interrupt() return true only if IPI HW exist.

Cc: stable@vger.kernel.org
Reported-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/include/asm/irq_work.h b/arch/loongarch/include/asm/irq_work.h
index d63076e9160d561c86d56fee690f40e8b2e01f5e..63aee0335d1a3608a4af5a4813afb7e36f889bb9 100644 (file)
--- a/arch/loongarch/include/asm/irq_work.h
+++ b/arch/loongarch/include/asm/irq_work.h
@@ -4,7 +4,7 @@
 
 static inline bool arch_irq_work_has_interrupt(void)
 {
-       return IS_ENABLED(CONFIG_SMP);
+       return IS_ENABLED(CONFIG_SMP) && cpu_opt(LOONGARCH_CPU_CSRIPI);
 }
 
 #endif /* _ASM_LOONGARCH_IRQ_WORK_H */