linux-kernel - Re: [PATCH v5 0/5] add non-strict mode support for arm-smmu-v3

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Message-ID: <20180912165700.GC16071@arm.com>
Date:   Wed, 12 Sep 2018 17:57:00 +0100
From:   Will Deacon <will.deacon@....com>
To:     Zhen Lei <thunder.leizhen@...wei.com>
Cc:     Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        iommu <iommu@...ts.linux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        LinuxArm <linuxarm@...wei.com>,
        Hanjun Guo <guohanjun@...wei.com>,
        Libin <huawei.libin@...wei.com>,
        John Garry <john.garry@...wei.com>
Subject: Re: [PATCH v5 0/5] add non-strict mode support for arm-smmu-v3

Hi all,

On Wed, Aug 15, 2018 at 09:28:25AM +0800, Zhen Lei wrote:
> v4 -> v5:
> 1. change the type of global variable and struct member named "non_strict" from
>    "int" to "bool".
> 2. cancel the unnecessary parameter "strict" of __arm_lpae_unmap which was added
>    in v4.
> 3. change boot option "arm_iommu" to "iommu.non_strict".
> 4. convert __iommu_dma_unmap to use iommu_unmap_fast()/iommu_tlb_sync(), because
>    non-leaf unmaps still need to be synchronous.
> 
> Thanks for Robin's review comments.

Since this is 90% of the way there now, I suggest Robin picks up what's here
and incorporates his remaining review comments directly (especially since it
sounded like Zhen Lei hasn't got much free time lately). With that, I can
queue this lot via my smmu branch, which already has some stuff queued
for SMMUv3 and io-pgtable.

Please shout if you have any objections, but I'm keen for this not to
languish on the lists given how close it is!

Will