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

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

Huacai Chen posted 1 patch 4 hours ago

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arch/loongarch/include/asm/irq_work.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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

Posted by Huacai Chen 4 hours ago

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.

Reported-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 arch/loongarch/include/asm/irq_work.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/loongarch/include/asm/irq_work.h b/arch/loongarch/include/asm/irq_work.h
index d63076e9160d..63aee0335d1a 100644
--- 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 */
-- 
2.52.0