Re: [PATCH stable v5.10 0/7] arm64: Default to 32-bit wide ZONE_DMA

[Kefeng Wang]

On 2021/6/25 18:19, Greg KH wrote:
> On Wed, Jun 23, 2021 at 04:01:10PM +0800, Kefeng Wang wrote:
> > Let's inline the link:
> > https://lore.kernel.org/lkml/20210303073319.2215839-1-jingxiangfeng@xxxxxxxxxx/
> >
> > The following 7 patches(we asked from link) has merged into lts5.10(tag:
> > v5.10.22)
> >
> >    4d7ed9a49b0c mm: Remove examples from enum zone_type comment
> >    8eaef922e938 arm64: mm: Set ZONE_DMA size based on early IORT scan
> >    35ec3d09ff6a arm64: mm: Set ZONE_DMA size based on devicetree's dma-ranges
> >    a9861e7fa4f8 of: unittest: Add test for of_dma_get_max_cpu_address()
> >    18bf6e998d08 of/address: Introduce of_dma_get_max_cpu_address()
> >    3fbe62ffbb54 arm64: mm: Move zone_dma_bits initialization into
> > zone_sizes_init()
> >    407b173adfac arm64: mm: Move reserve_crashkernel() into mem_init()
> >
> > but the patch "arm64: mm: Move reserve_crashkernel() into mem_init()"
> > has some issue, see the following discussion from Catalin,
> >
> > https://lore.kernel.org/linux-devicetree/e60d643e-4879-3fc3-737d-2c145332a6d7@xxxxxxx/
> > https://lore.kernel.org/linux-arm-kernel/20201119175556.18681-1-catalin.marinas@xxxxxxx/
> >
> > and yes, we met crash in lts5.10 when kexec boot due to "arm64: mm: Move
> > reserve_crashkernel() into mem_init()" too, which could be fixed by
> > commit 2687275a5843 "arm64: Force NO_BLOCK_MAPPINGS if crashkernel
> > reservation is required", and the commit 791ab8b2e3db "arm64: Ignore any DMA
> > offsets in the max_zone_phys() calculation" also about DMA set,
> > So I only asked the two patches(both in v5.11) related ARM64 ZONE_DMA
> > changes backported into lts5.10.
> Thanks, all now queued up.
Thank you again ;)
> greg k-h
> .