linux-kernel - [PATCH 2/2] MIPS: Loongson64: Set cluster for cores

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Date:   Wed, 30 Dec 2020 11:39:49 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     linux-mips@...r.kernel.org
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Huacai Chen <chenhc@...ote.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] MIPS: Loongson64: Set cluster for cores

cluster is required for cacheinfo to set shared_cpu_map correctly.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
Reviewed-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
Tested-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/mips/loongson64/smp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/loongson64/smp.c b/arch/mips/loongson64/smp.c
index e744e1bee49e..fae3a97d853c 100644
--- a/arch/mips/loongson64/smp.c
+++ b/arch/mips/loongson64/smp.c
@@ -403,6 +403,8 @@ static void __init loongson3_smp_setup(void)
 			__cpu_number_map[i] = num;
 			__cpu_logical_map[num] = i;
 			set_cpu_possible(num, true);
+			/* Loongson processors are always grouped by 4 */
+			cpu_set_cluster(&cpu_data[num], i / 4);
 			num++;
 		}
 		i++;
-- 
2.30.0