linux-kernel - [PATCH v6 0/7] arm64: Default to 32-bit wide ZONE

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Date:   Tue,  3 Nov 2020 18:31:51 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     robh+dt@...nel.org, catalin.marinas@....com, hch@....de,
        ardb@...nel.org, linux-kernel@...r.kernel.org
Cc:     robin.murphy@....com, linux-arm-kernel@...ts.infradead.org,
        linux-rpi-kernel@...ts.infradead.org, jeremy.linton@....com,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        will@...nel.org, lorenzo.pieralisi@....com, guohanjun@...wei.com,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        linux-acpi@...r.kernel.org, linux-mm@...ck.org,
        linux-riscv@...ts.infradead.org
Subject: [PATCH v6 0/7] arm64: Default to 32-bit wide ZONE_DMA

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.

---

Changes since v5:
 - Unify ACPI/DT functions

Changes since v4:
 - Fix of_dma_get_max_cpu_address() so it returns the last addressable
   addres, not the limit

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      | 18 ++++++-------
 drivers/acpi/arm64/iort.c | 55 +++++++++++++++++++++++++++++++++++++++
 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, 135 insertions(+), 29 deletions(-)

-- 
2.29.1