linux-kernel - [PATCH 5.15 117/262] riscv/mm: Add XIP_FIXUP for phys_ram

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Date:   Mon,  7 Mar 2022 10:17:41 +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, Myrtle Shah <gatecat@....me>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 117/262] riscv/mm: Add XIP_FIXUP for phys_ram_base

From: Palmer Dabbelt <palmer@...osinc.com>

[ Upstream commit 4b1c70aa8ed8249608bb991380cb8ff423edf49e ]

This manifests as a crash early in boot on VexRiscv.

Signed-off-by: Myrtle Shah <gatecat@....me>
[Palmer: split commit]
Fixes: 6d7f91d914bc ("riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address conversion")
Cc: stable@...r.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/riscv/mm/init.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 5e7decd875258..3de593b26850e 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -451,6 +451,7 @@ static uintptr_t __init best_map_size(phys_addr_t base, phys_addr_t size)
 }
 
 #ifdef CONFIG_XIP_KERNEL
+#define phys_ram_base  (*(phys_addr_t *)XIP_FIXUP(&phys_ram_base))
 /* called from head.S with MMU off */
 asmlinkage void __init __copy_data(void)
 {
-- 
2.34.1