linux-kernel - [PATCH] LoongArch: Align the address of kernel

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Message-Id: <20220927045720.2767521-1-chenhuacai@loongson.cn>
Date:   Tue, 27 Sep 2022 12:57:20 +0800
From:   Huacai Chen <chenhuacai@...ngson.cn>
To:     Huacai Chen <chenhuacai@...nel.org>
Cc:     loongarch@...ts.linux.dev, Xuefeng Li <lixuefeng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-kernel@...r.kernel.org, Huacai Chen <chenhuacai@...ngson.cn>
Subject: [PATCH] LoongArch: Align the address of kernel_entry to 4KB

Align the address of kernel_entry to 4KB, to avoid early tlb miss
exception in case the entry code crosses page boundary.

Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
---
 arch/loongarch/kernel/head.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index 8f89f39fd31b..7e57ae8741b1 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -34,6 +34,8 @@ SYM_DATA(kernel_offset, .long kernel_offset - _text);
 
 	__REF
 
+	.align 12
+
 SYM_CODE_START(kernel_entry)			# kernel entry point
 
 	/* Config direct window and set PG */
-- 
2.31.1