[PATCH] riscv/mm: Add XIP_FIXUP for phys_ram_base

[Palmer Dabbelt <palmer@xxxxxxxxxxxx>]

This manifests as a crash early in boot on VexRiscv.

Signed-off-by: Myrtle Shah <gatecat@xxxxxx>
[Palmer: split commit]
Fixes: 6d7f91d914bc ("riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address conversion")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index cf4d018b7d66..eecfacac2cc5 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -522,6 +522,7 @@ 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))
 extern char _xiprom[], _exiprom[], __data_loc;
 
 /* called from head.S with MMU off */