linux-kernel - [PATCH v2 0/2] arm64: Fix CMA/crashkernel reservation

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Message-Id: <20191106095945.22933-1-nsaenzjulienne@suse.de>
Date:   Wed,  6 Nov 2019 10:59:43 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     catalin.marinas@....com, linux-kernel@...r.kernel.org
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        devicetree@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 0/2] arm64: Fix CMA/crashkernel reservation

As pointed out by Qian Cai[1] the series enabling ZONE_DMA in arm64
breaks CMA/crashkernel reservations on large devices, as it changed its
default placement. After discussing it with Catalin Marinas we're
restoring the old behavior.

The Raspberry Pi 4, being the only device that needs CMA and crashkernel
in ZONE_DMA will explicitly do so trough it's device tree.

[1] https://lkml.org/lkml/2019/10/21/725

---

Changes since v1:
  - Move CMA area registration into bcm2711.dtsi

Nicolas Saenz Julienne (2):
  ARM: dts: bcm2711: force CMA into first GB of memory
  arm64: mm: reserve CMA and crashkernel in ZONE_DMA32

 arch/arm/boot/dts/bcm2711.dtsi | 20 ++++++++++++++++++++
 arch/arm64/mm/init.c           |  4 ++--
 2 files changed, 22 insertions(+), 2 deletions(-)

-- 
2.23.0