linux-kernel - [PATCH v2 0/3] arm64: mm: reserve CMA and crashkernel in ZONE

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Message-ID: <20201230102322.176313-1-chenzhou10@huawei.com>
Date:   Wed, 30 Dec 2020 18:23:19 +0800
From:   Chen Zhou <chenzhou10@...wei.com>
To:     <catalin.marinas@....com>, <will@...nel.org>
CC:     <ardb@...nel.org>, <akpm@...ux-foundation.org>,
        <nsaenzjulienne@...e.de>, <rppt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <chenzhou10@...wei.com>,
        <guohanjun@...wei.com>, <huawei.libin@...wei.com>
Subject: [PATCH v2 0/3] arm64: mm: reserve CMA and crashkernel in ZONE_DMA if enabled 

Currently, CMA and crashkernel are reserved in ZONE_DMA32, which
is OK for majority of devices. But the ones that need them in ZONE_DMA
need to configure it explicitly.

Since patchset "arm64: Default to 32-bit wide ZONE_DMA", ZONE_DMA's
size is fine-tuned. So we could directly reserve CMA and crashkernel
in ZONE_DMA if CONFIG_ZONE_DMA is enabled, otherwise, reserving in
ZONE_DMA32.

Patch 1 updates the comments about the ZONE_DMA.
Patch 2 move dma_contiguous_reserve() to bootmem_init()
Patch 3 reserve CMA and crashkernel in ZONE_DMA if enabled

Changes since v1:
- Add Reviewed-by for patch 1 from Nicolas.
- Suggested by Nicolas, also reserve CMA in ZONE_DMA if enabled.

Chen Zhou (3):
  arm64: mm: update the comments about ZONE_DMA
  arm64: mm: move dma_contiguous_reserve() to bootmem_init()
  arm64: mm: reserve CMA and crashkernel in ZONE_DMA if enabled

 arch/arm64/mm/init.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

-- 
2.20.1