From: Olof Johansson <olof@lixom.net>
Date: Mon, 6 Jan 2020 23:20:24 +0000 (-0800)
Subject: riscv: keep 32-bit kernel to 32-bit phys_addr_t
X-Git-Tag: v5.6-rc1~104^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fc76324fa27fa4cab2cf115460d3a1d8e7e201ee;p=thirdparty%2Flinux.git

riscv: keep 32-bit kernel to 32-bit phys_addr_t

While rv32 technically has 34-bit physical addresses, no current platforms
use it and it's likely to shake out driver bugs.

Let's keep 64-bit phys_addr_t off on 32-bit builds until one shows up,
since other work will be needed to make such a system useful anyway.

PHYS_ADDR_T_64BIT is def_bool 64BIT, so just remove the select.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index d1d77c6d67217..b04692fd4a638 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -12,8 +12,6 @@ config 32BIT
 
 config RISCV
 	def_bool y
-	# even on 32-bit, physical (and DMA) addresses are > 32-bits
-	select PHYS_ADDR_T_64BIT
 	select OF
 	select OF_EARLY_FLATTREE
 	select OF_IRQ