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SubjectRe: [PATCH v4 0/7] arm64: Default to 32-bit wide ZONE_DMA
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Hi,

On 10/21/20 7:34 AM, Nicolas Saenz Julienne wrote:
> 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.

I've tested this in ACPI mode on the rpi4 (4+8G with/without the 3G
limiter) as well, with Ard's IORT patch. Nothing seems to have regressed.

Thanks,

Tested-by: Jeremy Linton <jeremy.linton@arm.com>




>
> ---
>
> Changes since v3:
> - Drop patch adding define in dma-mapping
> - Address small review changes
> - Update Ard's patch
> - Add new patch removing examples from mmzone.h
>
> Changes since v2:
> - Introduce Ard's patch
> - Improve OF dma-ranges parsing function
> - Add unit test for OF function
> - Address small changes
> - Move crashkernel reservation later in boot process
>
> Changes since v1:
> - Parse dma-ranges instead of using machine compatible string
>
> Ard Biesheuvel (1):
> arm64: mm: Set ZONE_DMA size based on early IORT scan
>
> Nicolas Saenz Julienne (6):
> arm64: mm: Move reserve_crashkernel() into mem_init()
> arm64: mm: Move zone_dma_bits initialization into zone_sizes_init()
> of/address: Introduce of_dma_get_max_cpu_address()
> of: unittest: Add test for of_dma_get_max_cpu_address()
> arm64: mm: Set ZONE_DMA size based on devicetree's dma-ranges
> mm: Remove examples from enum zone_type comment
>
> arch/arm64/mm/init.c | 16 ++++++------
> drivers/acpi/arm64/iort.c | 52 +++++++++++++++++++++++++++++++++++++++
> drivers/of/address.c | 42 +++++++++++++++++++++++++++++++
> drivers/of/unittest.c | 18 ++++++++++++++
> include/linux/acpi_iort.h | 4 +++
> include/linux/mmzone.h | 20 ---------------
> include/linux/of.h | 7 ++++++
> 7 files changed, 130 insertions(+), 29 deletions(-)
>

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