Jisheng Zhang dcb2743d1e

riscv: mm: still create swiotlb buffer for kmalloc() bouncing if required ...

After commit f51f7a0fc2f4 ("riscv: enable DMA_BOUNCE_UNALIGNED_KMALLOC
for !dma_coherent"), for non-coherent platforms with less than 4GB
memory, we rely on users to pass "swiotlb=mmnn,force" kernel parameters
to enable DMA bouncing for unaligned kmalloc() buffers. Now let's go
further: If no bouncing needed for ZONE_DMA, let kernel automatically
allocate 1MB swiotlb buffer per 1GB of RAM for kmalloc() bouncing on
non-coherent platforms, so that no need to pass "swiotlb=mmnn,force"
any more.

The math of "1MB swiotlb buffer per 1GB of RAM for kmalloc() bouncing"
is taken from arm64. Users can still force smaller swiotlb buffer by
passing "swiotlb=mmnn".

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240325110036.1564-1-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

2024-04-30 10:35:45 -07:00

..

cache-ops.c

riscv: split cache ops out of dma-noncoherent.c

2023-11-07 09:37:42 -08:00

cacheflush.c

Merge patch series "riscv: Create and document PR_RISCV_SET_ICACHE_FLUSH_CTX prctl"

2024-04-30 10:35:42 -07:00

context.c

Merge patch series "riscv: Create and document PR_RISCV_SET_ICACHE_FLUSH_CTX prctl"

2024-04-30 10:35:42 -07:00

dma-noncoherent.c

iommu: Remove struct iommu_ops *iommu from arch_setup_dma_ops()

2023-12-12 10:18:45 +01:00

extable.c

riscv: select DCACHE_WORD_ACCESS for efficient unaligned access HW

2024-01-09 20:18:20 -08:00

fault.c

RISC-V Patches for the 6.8 Merge Window, Part 1

2024-01-17 10:50:46 -08:00

hugetlbpage.c

riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION

2024-02-22 12:28:25 -08:00

init.c

riscv: mm: still create swiotlb buffer for kmalloc() bouncing if required

2024-04-30 10:35:45 -07:00

kasan_init.c

percpu:

2024-01-18 15:01:28 -08:00

Makefile

riscv: mm: Only compile pgtable.c if MMU

2023-12-20 10:48:14 -08:00

pageattr.c

Merge remote-tracking branch 'palmer/fixes' into for-next

2024-01-09 20:10:32 -08:00

pgtable.c

riscv: Only flush the mm icache when setting an exec pte

2024-03-20 08:56:08 -07:00

physaddr.c

riscv: Use PUD/P4D/PGD pages for the linear mapping

2023-04-18 20:43:04 -07:00

pmem.c

RISC-V: capitalise CMO op macros

2023-11-05 09:11:23 -08:00

ptdump.c

mm: ptdump: have ptdump_check_wx() return bool

2024-02-22 10:24:47 -08:00

tlbflush.c

riscv: Fix arch_tlbbatch_flush() by clearing the batch cpumask

2024-02-07 10:19:37 -08:00