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Mon, 13 Jul 2026 12:28:11 -0700 (PDT) Received: from ziepe.ca ([159.2.72.92]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ffd5bbac2asm137804776d6.21.2026.07.13.12.28.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 12:28:09 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wjMK0-0000000E5Zr-4AHb; Mon, 13 Jul 2026 16:28:09 -0300 Date: Mon, 13 Jul 2026 16:28:08 -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 15/22] dma-direct: pass attrs to dma_capable() for DMA_ATTR_CC_SHARED checks Message-ID: <20260713192808.GU3133966@ziepe.ca> References: <20260701054926.825925-1-aneesh.kumar@kernel.org> <20260701054926.825925-16-aneesh.kumar@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260701054926.825925-16-aneesh.kumar@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260713_122813_528533_DFB28C2F X-CRM114-Status: GOOD ( 11.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jul 01, 2026 at 11:19:19AM +0530, Aneesh Kumar K.V (Arm) wrote: > Teach dma_capable() about DMA_ATTR_CC_SHARED so the capability > check can reject encrypted DMA addresses for devices that require > unencrypted/shared DMA. > > Also propagate DMA_ATTR_CC_SHARED in swiotlb_map() when the selected > SWIOTLB pool is decrypted so the capability check sees the correct DMA > address attribute. > > Tested-by: Jiri Pirko > Tested-by: Michael Kelley > Tested-by: Mostafa Saleh > Reviewed-by: Petr Tesarik > Signed-off-by: Aneesh Kumar K.V (Arm) > --- > arch/x86/kernel/amd_gart_64.c | 30 ++++++++++++++++-------------- > drivers/xen/swiotlb-xen.c | 6 +++--- > include/linux/dma-direct.h | 10 +++++++++- > kernel/dma/direct.h | 6 +++--- > kernel/dma/swiotlb.c | 2 +- > 5 files changed, 32 insertions(+), 22 deletions(-) Reviewed-by: Jason Gunthorpe Jason