[PATCH 0/4] arm64: Default to 32-bit wide ZONE_DMA

Nicolas Saenz Julienne
2020-10-01T16:18:01Z

Using two distinct DMA zones turned out to be problematic. Here's an
attempt go back to a saner default.

I tested this on both a RPi4 and QEMU.

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Nicolas Saenz Julienne (4):
of/fdt: Update zone_dma_bits when running in bcm2711
dma-direct: Turn zone_dma_bits default value into a define
arm64: Default to 32-bit ZONE_DMA
mm: Update DMA zones description with arm64 newer behavior

arch/arm64/mm/init.c | 12 ++++++++----
drivers/of/fdt.c | 10 ++++++++++
include/linux/dma-direct.h | 1 +
include/linux/mmzone.h | 5 +++--
kernel/dma/direct.c | 2 +-
5 files changed, 23 insertions(+), 7 deletions(-)

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2.28.0