diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-01-16 09:37:50 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-30 19:14:27 -0800 |
| commit | 5ec9c4ff0430e33b602cc0ff8ab9dec8ef548d28 (patch) | |
| tree | 3fb2ff5397466ecc5516d7e8d56e71e17e15ca41 /arch/riscv/Kconfig | |
| parent | f1b65f20fb05d1dd94656904848b96cc6df52bc0 (diff) | |
riscv: add ZONE_DMA32
This patch allows devices that require memory that can be addressed
using 32-bit addresses to work easily on RISC-V systems. The newly
improved dma-direct ops will tap into this pool automatically for
32-bit addressing.
Based on an earlier patch from Wesley W. Terpstra.
CC: Wesley W. Terpstra <terpstra@sifive.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 504ba386b22e..0e66993f44cc 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -22,6 +22,7 @@ config RISCV select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A select ARCH_WANT_OPTIONAL_GPIOLIB select HAVE_MEMBLOCK + select HAVE_MEMBLOCK_NODE_MAP select HAVE_DMA_API_DEBUG select HAVE_DMA_CONTIGUOUS select HAVE_GENERIC_DMA_COHERENT @@ -43,6 +44,10 @@ config MMU config ARCH_PHYS_ADDR_T_64BIT def_bool y +config ZONE_DMA32 + bool + default y + config ARCH_DMA_ADDR_T_64BIT def_bool y |