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riscv: Kconfig: Select DMA_DIRECT_REMAP only if MMU is enabled 

kernel/dma/mapping.c has its use of pgprot_dmacoherent() inside
an #ifdef CONFIG_MMU block. kernel/dma/pool.c has its use of
pgprot_dmacoherent() inside an #ifdef CONFIG_DMA_DIRECT_REMAP block.
So select DMA_DIRECT_REMAP only if MMU is enabled for RISCV_DMA_NONCOHERENT
config.

This avoids users to explicitly select MMU.

Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20230901105111.311200-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Lad Prabhakar 2023-09-01 11:51:11 +01:00 committed by Palmer Dabbelt
parent 77eea559ba
commit e7ddd00eb3
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1 changed files with 1 additions and 1 deletions
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arch/riscv/Kconfig
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@ -273,7 +273,7 @@ config RISCV_DMA_NONCOHERENT
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB
select DMA_DIRECT_REMAP
select DMA_DIRECT_REMAP if MMU
config RISCV_NONSTANDARD_CACHE_OPS
bool