linux-kernel - Re: [PATCH v7 00/17] Provide a new two step DMA mapping API

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Message-ID: <20250325144158.GA4558@unreal>
Date: Tue, 25 Mar 2025 16:41:58 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Jason Gunthorpe <jgg@...pe.ca>
Cc: Robin Murphy <robin.murphy@....com>, Christoph Hellwig <hch@....de>,
	Jens Axboe <axboe@...nel.dk>, Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>, Sagi Grimberg <sagi@...mberg.me>,
	Keith Busch <kbusch@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Logan Gunthorpe <logang@...tatee.com>,
	Yishai Hadas <yishaih@...dia.com>,
	Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
	Kevin Tian <kevin.tian@...el.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Jérôme Glisse <jglisse@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	linux-rdma@...r.kernel.org, iommu@...ts.linux.dev,
	linux-nvme@...ts.infradead.org, linux-pci@...r.kernel.org,
	kvm@...r.kernel.org, linux-mm@...ck.org,
	Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v7 00/17] Provide a new two step DMA mapping API

On Tue, Mar 25, 2025 at 09:36:37AM -0300, Jason Gunthorpe wrote:
> On Fri, Mar 21, 2025 at 04:05:22PM +0000, Robin Murphy wrote:

<...>

> > So what is it now, a layering violation in a hat with still no clear path to
> > support SWIOTLB?
> 
> I was under the impression Leon had been testing SWIOTLB?

Yes, SWIOTLB works and Christoph said it more than once that he tested
NVMe conversion patches and they worked.

Thanks