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arch/config: Make RISC-V 64-bits MMU optional

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Linux supports No-MMU RISC-V 64-bits since kernel version 5.8. Make
MMU optional to enable building for RISC-V 64-bits boards that do not
have one. MMU use of RISC-V 32-bits builds remains mandatory for now.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Damien Le Moal 2021-10-26 16:17:22 +09:00 committed by Peter Korsgaard
parent 607a5a3b79
commit 343643fdf1
2 changed files with 2 additions and 1 deletions
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1
arch/Config.in
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@ -209,7 +209,6 @@ config BR2_powerpc64le
config BR2_riscv
bool "RISCV"
select BR2_ARCH_HAS_MMU_MANDATORY
select BR2_ARCH_NEEDS_GCC_AT_LEAST_7
help
RISC-V is an open, free Instruction Set Architecture created

2
arch/Config.in.riscv
View File

@ -71,10 +71,12 @@ choice
config BR2_RISCV_32
bool "32-bit"
select BR2_ARCH_HAS_MMU_MANDATORY
config BR2_RISCV_64
bool "64-bit"
select BR2_ARCH_IS_64
select BR2_ARCH_HAS_MMU_OPTIONAL
endchoice