Unverified Commit b5e2c507 authored by Yimin Gu's avatar Yimin Gu Committed by Palmer Dabbelt
Browse files

riscv: Kconfig: Allow RV32 to build with no MMU 



Some RISC-V 32bit cores do not have an MMU, and the kernel should be
able to build for them. This patch enables the RV32 to be built with
no MMU support.

Signed-off-by: default avatarYimin Gu <ustcymgu@gmail.com>
CC: Jesse Taube <Mr.Bossman075@gmail.com>
Tested-by: default avatarWaldemar Brodkorb <wbx@openadk.org>
Signed-off-by: default avatarJesse Taube <Mr.Bossman075@gmail.com>
Reviewed-by: default avatarDamien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230301002657.352637-3-Mr.Bossman075@gmail.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent fe15c26e

arch/riscv/Kconfig

+2 −3
Original line number Diff line number Diff line
@@ -177,8 +177,8 @@ config MMU 


config PAGE_OFFSET

	hex

	default 0xC0000000 if 32BIT

	default 0x80000000 if 64BIT && !MMU

	default 0xC0000000 if 32BIT && MMU

	default 0x80000000 if !MMU

	default 0xff60000000000000 if 64BIT



config KASAN_SHADOW_OFFSET
@@ -279,7 +279,6 @@ config ARCH_RV32I 
	select GENERIC_LIB_ASHRDI3

	select GENERIC_LIB_LSHRDI3

	select GENERIC_LIB_UCMPDI2

	select MMU



config ARCH_RV64I

	bool "RV64I"