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Wed, 11 Mar 2026 07:19:25 -0700 (PDT) Date: Wed, 11 Mar 2026 15:19:23 +0100 From: Jiri Pirko To: Jason Gunthorpe Cc: Petr Tesarik , dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, iommu@lists.linux.dev, linux-media@vger.kernel.org, sumit.semwal@linaro.org, benjamin.gaignard@collabora.com, Brian.Starkey@arm.com, jstultz@google.com, tjmercier@google.com, christian.koenig@amd.com, m.szyprowski@samsung.com, robin.murphy@arm.com, leon@kernel.org, sean.anderson@linux.dev, catalin.marinas@arm.com, aneesh.kumar@kernel.org, suzuki.poulose@arm.com, steven.price@arm.com, thomas.lendacky@amd.com, john.allen@amd.com, ashish.kalra@amd.com, suravee.suthikulpanit@amd.com, linux-coco@lists.linux.dev Subject: Re: [PATCH net-next v3 1/2] dma-mapping: introduce DMA_ATTR_CC_DECRYPTED for pre-decrypted memory Message-ID: References: <20260305123641.164164-1-jiri@resnulli.us> <20260305123641.164164-2-jiri@resnulli.us> <20260309135610.1f81d2df@mordecai> <20260309131736.GK1687929@ziepe.ca> Precedence: bulk X-Mailing-List: linux-media@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: <20260309131736.GK1687929@ziepe.ca> Mon, Mar 09, 2026 at 02:17:36PM +0100, jgg@ziepe.ca wrote: >On Mon, Mar 09, 2026 at 01:56:10PM +0100, Petr Tesarik wrote: >> I don't want to start a bikeshedding discussion, so if everyone else >> likes this name, let's keep it. But maybe the "_CC" (meaning >> Confidential Comptuing) is not necessary. IIUC it's the same concept as >> set_page_encrypted(), set_page_decrypted(), which does not refer to >> CoCo either. > >Frankly I hate that AMD got their "encrypted" "decrypted" naming baked >into the CC related APIs. > >I'm not at all convinced that they "do not refer to CoCo" in the way >Linux uses them and other arches absolutely make them 100% tied to coco. > >If we are going to bikeshed the name it should be DMA_ATTR_CC_SHARED On the other hand, the encrypted/decrypted helpers could be always renamed if it makes sense. Better to perhaps have DMA_ATTR_DECRYPTED to have things consistently named now? If someone renames them all in the future, so be it.