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[47.54.130.67]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b53d6442d0sm338851976d6.46.2026.05.12.05.42.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2026 05:42:06 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wMmR4-00000005AmI-1e6f; Tue, 12 May 2026 09:42:06 -0300 Date: Tue, 12 May 2026 09:42:06 -0300 From: Jason Gunthorpe To: Mostafa Saleh Cc: Catalin Marinas , "Aneesh Kumar K.V (Arm)" , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Robin Murphy , Marek Szyprowski , Will Deacon , Marc Zyngier , Steven Price , Suzuki K Poulose , Jiri Pirko , Petr Tesarik , Alexey Kardashevskiy , Dan Williams , Xu Yilun Subject: Re: [PATCH v3 0/9] dma-mapping: Use DMA_ATTR_CC_SHARED through direct, pool and swiotlb paths Message-ID: <20260512124206.GV9285@ziepe.ca> References: <20260427055509.898190-1-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, May 11, 2026 at 11:13:43AM +0000, Mostafa Saleh wrote: > On Fri, May 08, 2026 at 06:28:11PM +0100, Catalin Marinas wrote: > > On Mon, Apr 27, 2026 at 11:25:00AM +0530, Aneesh Kumar K.V (Arm) wrote: > > > This series propagates DMA_ATTR_CC_SHARED through the dma-direct, > > > dma-pool, and swiotlb paths so that encrypted and decrypted DMA buffers > > > are handled consistently. > > > > I think this series makes sense, using DMA_ATTR_CC_SHARED throughout the > > DMA API, either for alloc or for streaming to decide/check what bouncing > > does. Sashiko has a few interesting reports, it probably breaks s390 as > > well (it might be similar to the pKVM case). > > I have this series on my review list, I believe there is an overlap with > my series, I can rebase mine on top of this if that makes sense, I will > probably wait for a new version to address the current comments and > Sashiko notes. I've been wondering about the two series as well.. I think this is a big help to your project, but it would be nice to know?? Jason