Re: [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool

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Subject: Re: [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool
From: Claire Chang <tientzu@xxxxxxxxxxxx>
Date: Fri, 8 Jan 2021 01:39:18 +0800
Cc: Rob Herring <robh+dt@xxxxxxxxxx>, mpe@xxxxxxxxxxxxxx, benh@xxxxxxxxxxxxxxxxxxx, paulus@xxxxxxxxx, "list@xxxxxxx:IOMMU DRIVERS <iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>," <joro@xxxxxxxxxx>, will@xxxxxxxxxx, Frank Rowand <frowand.list@xxxxxxxxx>, boris.ostrovsky@xxxxxxxxxx, jgross@xxxxxxxx, sstabellini@xxxxxxxxxx, Christoph Hellwig <hch@xxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, grant.likely@xxxxxxx, xypron.glpk@xxxxxx, Thierry Reding <treding@xxxxxxxxxx>, mingo@xxxxxxxxxx, bauerman@xxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>, Saravana Kannan <saravanak@xxxxxxxxxx>, rafael.j.wysocki@xxxxxxxxx, heikki.krogerus@xxxxxxxxxxxxxxx, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, rdunlap@xxxxxxxxxxxxx, dan.j.williams@xxxxxxxxx, Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>, linux-devicetree <devicetree@xxxxxxxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, "list@xxxxxxx:IOMMU DRIVERS <iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>," <iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Tomasz Figa <tfiga@xxxxxxxxxxxx>, Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
In-reply-to: <20210106185241.GA109735@localhost.localdomain>

Hi Greg and Konrad,

This change is intended to be non-arch specific. Any arch that lacks DMA access
control and has devices not behind an IOMMU can make use of it. Could you share
why you think this should be arch specific?

Thanks!

Follow-Ups:
- Re: [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool
  - From: Konrad Rzeszutek Wilk

References:
- [RFC PATCH v3 0/6] Restricted DMA
  - From: Claire Chang
- [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool
  - From: Claire Chang
- Re: [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool
  - From: Konrad Rzeszutek Wilk

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