linux-kernel - [PATCH 5.16 076/203] riscv/mm: Add XIP_FIXUP for phys_ram

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Date:   Mon, 14 Feb 2022 10:25:20 +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>
Subject: [PATCH 5.16 076/203] riscv/mm: Add XIP_FIXUP for phys_ram_base

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

commit 4b1c70aa8ed8249608bb991380cb8ff423edf49e upstream.

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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/riscv/mm/init.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -41,6 +41,7 @@ phys_addr_t phys_ram_base __ro_after_ini
 EXPORT_SYMBOL(phys_ram_base);
 
 #ifdef CONFIG_XIP_KERNEL
+#define phys_ram_base  (*(phys_addr_t *)XIP_FIXUP(&phys_ram_base))
 extern char _xiprom[], _exiprom[], __data_loc;
 #endif