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Mon, 13 Jul 2026 12:26:32 -0700 (PDT) Received: from ziepe.ca ([159.2.72.92]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-51cbd8efab4sm70831241cf.1.2026.07.13.12.26.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 12:26:31 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wjMIR-0000000E5Pw-0MTy; Mon, 13 Jul 2026 16:26:31 -0300 Date: Mon, 13 Jul 2026 16:26:31 -0300 From: Jason Gunthorpe To: "Aneesh Kumar K.V (Arm)" Cc: iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, Robin Murphy , Marek Szyprowski , Will Deacon , Marc Zyngier , Steven Price , Suzuki K Poulose , Catalin Marinas , Jiri Pirko , Mostafa Saleh , Petr Tesarik , Alexey Kardashevskiy , Dan Williams , Xu Yilun , linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , x86@kernel.org, Jiri Pirko , Michael Kelley Subject: Re: [PATCH v7 14/22] dma-mapping: make dma_pgprot() honor __DMA_ATTR_ALLOC_CC_SHARED Message-ID: <20260713192631.GT3133966@ziepe.ca> References: <20260701054926.825925-1-aneesh.kumar@kernel.org> <20260701054926.825925-15-aneesh.kumar@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260701054926.825925-15-aneesh.kumar@kernel.org> On Wed, Jul 01, 2026 at 11:19:18AM +0530, Aneesh Kumar K.V (Arm) wrote: > Fold encrypted/decrypted pgprot selection into dma_pgprot() so callers > do not need to adjust the page protection separately. > > Update dma_pgprot() to apply pgprot_decrypted() when DMA_ATTR_CC_SHARED or > __DMA_ATTR_ALLOC_CC_SHARED is set and pgprot_encrypted() otherwise Convert > the dma-direct mmap paths to pass DMA_ATTR_CC_SHARED instead of open-coding > force_dma_unencrypted() handling around dma_pgprot(). > > Tested-by: Jiri Pirko > Tested-by: Michael Kelley > Tested-by: Mostafa Saleh > Signed-off-by: Aneesh Kumar K.V (Arm) > --- > kernel/dma/direct.c | 8 +++----- > kernel/dma/mapping.c | 16 ++++++++++++---- > 2 files changed, 15 insertions(+), 9 deletions(-) Reviewed-by: Jason Gunthorpe Jason