linux-kernel - [PATCH for-5.19 1/2] irqchip/loongson-liointc: Use architecture register to get coreid

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Message-Id: <20220604124052.1550-1-jiaxun.yang@flygoat.com>
Date:   Sat,  4 Jun 2022 13:40:51 +0100
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     chenhuacai@...nel.org
Cc:     kernel@...0n.name, maz@...nel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: [PATCH for-5.19 1/2] irqchip/loongson-liointc: Use architecture register to get coreid

fa84f89395e0 ("irqchip/loongson-liointc: Fix build error for
LoongArch") replaced get_ebase_cpunum with physical processor
id from SMP facilities. However that breaks MIPS non-SMP build
and makes booting from other cores inpossible on non-SMP kernel.

Thus we revert get_ebase_cpunum back and use get_csr_cpuid for
LoongArch.

Fixes: fa84f89395e0 ("irqchip/loongson-liointc: Fix build error for LoongArch")
Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 drivers/irqchip/irq-loongson-liointc.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
index aed88857d90f..c11cf97bcd1a 100644
--- a/drivers/irqchip/irq-loongson-liointc.c
+++ b/drivers/irqchip/irq-loongson-liointc.c
@@ -39,6 +39,14 @@
 
 #define LIOINTC_ERRATA_IRQ	10
 
+#if defined(CONFIG_MIPS)
+#define liointc_core_id get_ebase_cpunum()
+#elif defined(CONFIG_LOONGARCH)
+#define liointc_core_id get_csr_cpuid()
+#else
+#define liointc_core_id 0
+#endif
+
 struct liointc_handler_data {
 	struct liointc_priv	*priv;
 	u32			parent_int_map;
@@ -57,7 +65,7 @@ static void liointc_chained_handle_irq(struct irq_desc *desc)
 	struct liointc_handler_data *handler = irq_desc_get_handler_data(desc);
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 	struct irq_chip_generic *gc = handler->priv->gc;
-	int core = cpu_logical_map(smp_processor_id()) % LIOINTC_NUM_CORES;
+	int core = liointc_core_id % LIOINTC_NUM_CORES;
 	u32 pending;
 
 	chained_irq_enter(chip, desc);
-- 
2.25.1