linux-kernel - [PATCH 5.10 75/77] riscv: fix misalgned trap vector base address

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Message-Id: <20211101082527.164506260@linuxfoundation.org>
Date:   Mon,  1 Nov 2021 10:18:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chen Lu <181250012@...il.nju.edu.cn>,
        Anup Patel <anup.patel@....com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: [PATCH 5.10 75/77] riscv: fix misalgned trap vector base address

From: Chen Lu <181250012@...il.nju.edu.cn>

commit 64a19591a2938b170aa736443d5d3bf4c51e1388 upstream.

The trap vector marked by label .Lsecondary_park must align on a
4-byte boundary, as the {m,s}tvec is defined to require 4-byte
alignment.

Signed-off-by: Chen Lu <181250012@...il.nju.edu.cn>
Reviewed-by: Anup Patel <anup.patel@....com>
Fixes: e011995e826f ("RISC-V: Move relocate and few other functions out of __init")
Cc: stable@...r.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/riscv/kernel/head.S |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -175,6 +175,7 @@ setup_trap_vector:
 	csrw CSR_SCRATCH, zero
 	ret
 
+.align 2
 .Lsecondary_park:
 	/* We lack SMP support or have too many harts, so park this hart */
 	wfi