[PATCH v2] riscv: keep 32-bit kernel to 32-bit phys_addr_t

From: Olof Johansson <olof@lixom.net>
To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu
Cc: Olof Johansson <olof@lixom.net>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2] riscv: keep 32-bit kernel to 32-bit phys_addr_t
Date: Mon,  6 Jan 2020 15:20:24 -0800	[thread overview]
Message-ID: <20200106232024.97137-1-olof@lixom.net> (raw)
In-Reply-To: <20200106231611.10169-1-olof@lixom.net>

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>
---

v2: Just remove the select, since it's set by default if CONFIG_64BIT

 arch/riscv/Kconfig | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index a31169b02ec06..569fc6deb94d6 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
-- 
2.20.1


