diff options
| author |   Heiko Stuebner <heiko@sntech.de> | 2022-07-07 01:15:35 +0200 |
|---|---|---|
| committer |   Palmer Dabbelt <palmer@rivosinc.com> | 2022-07-28 15:30:51 -0700 |
| commit | 1631ba1259d6d7f49b6028f2a1a0fa02be1c522a (patch) | |
| tree | 224d5329d0ce1579c48f8f2b68b7a2c989dd9a96 /arch/riscv/mm/Makefile | |
| parent | dt-bindings: riscv: document cbom-block-size (diff) | |
| download | linux-dev-1631ba1259d6d7f49b6028f2a1a0fa02be1c522a.tar.xz linux-dev-1631ba1259d6d7f49b6028f2a1a0fa02be1c522a.zip | |
riscv: Add support for non-coherent devices using zicbom extension
The Zicbom ISA-extension was ratified in november 2021
and introduces instructions for dcache invalidate, clean
and flush operations.
Implement cache management operations for non-coherent devices
based on them.
Of course not all cores will support this, so implement an
alternative-based mechanism that replaces empty instructions
with ones done around Zicbom instructions.
As discussed in previous versions, assume the platform
being coherent by default so that non-coherent devices need
to get marked accordingly by firmware.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20220706231536.2041855-4-heiko@sntech.de
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/mm/Makefile')
| -rw-r--r-- | arch/riscv/mm/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile index ac7a25298a04..d76aabf4b94d 100644 --- a/arch/riscv/mm/Makefile +++ b/arch/riscv/mm/Makefile @@ -30,3 +30,4 @@ endif endif obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o +obj-$(CONFIG_RISCV_DMA_NONCOHERENT) += dma-noncoherent.o |