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Wed, 20 May 2026 23:51:49 -0700 (PDT) X-Received: by 2002:a05:6a00:845:b0:835:6d99:3f94 with SMTP id d2e1a72fcca58-8414adf542bmr1746442b3a.25.1779346309052; Wed, 20 May 2026 23:51:49 -0700 (PDT) Received: from [10.92.163.96] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84154e59ea9sm232016b3a.61.2026.05.20.23.51.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 20 May 2026 23:51:48 -0700 (PDT) Message-ID: Date: Thu, 21 May 2026 12:21:41 +0530 Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Kuldeep Singh Subject: Re: [PATCH 0/3] Add support for qcrypto on shikra To: Eric Biggers Cc: Thara Gopinath , Herbert Xu , "David S. Miller" , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Vinod Koul , Frank Li , Andy Gross , linux-arm-msm@vger.kernel.org, linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org References: <20260515-shikra_qcrypto-v1-0-80f07b345c29@oss.qualcomm.com> <20260514194735.GA1939213@google.com> Content-Language: en-US In-Reply-To: <20260514194735.GA1939213@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=bfhbluPB c=1 sm=1 tr=0 ts=6a0eab86 cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=1cRb9DtoxWFOFH21OVAA:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-GUID: EuaA8q-bbWO0Xp8S2YsO1-AfIWk-93Bw X-Proofpoint-ORIG-GUID: EuaA8q-bbWO0Xp8S2YsO1-AfIWk-93Bw X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTIxMDA2NSBTYWx0ZWRfX30QLzGoPs0av rjaZa5nS71uZYtvMPGqd+5UH4XlGxCpPVvjvDDE5mkiDJ/RNz9ObjDdqmfEABzq9Tb+vuygQS10 2XMKnFRyd1DzdXdDKXK0Uh8sEw+eDbpgZEBje16ichK5zIEdr+ssVgIaKu1rxHbsnHmttXjnWEf /PMf/pUy9zGKsBA6mndAIN8EKrXWj/oAt0oP9QEApzIuE3S4z8gBMG95X0ZGDSSInvMTi8N0PIL XuEhi3ibHCRkVAm3ZQPAMhYPTIP9SGR28uWeSavL4d2VpxSiBCEpmd9YegKBhFIupu/nkZFBFBz g0d0KUMjAEbThjzZ2rLssZihEtfclRGY+Sr3p37rC/1Vq9tRAbSI7RL7/Tvw5KOuuXhEORh6QtT fepnEqxi1eoXxdOj3h483+Xcf9bB+xN2eRassqNOa4+AGr7fuh6Jv0noQXwc4y9teD6GSxajZu+ j5Yci8hkoZimiAm+WiA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-20_03,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 adultscore=0 spamscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605210065 On 15-05-2026 01:17, Eric Biggers wrote: > On Fri, May 15, 2026 at 12:53:35AM +0530, Kuldeep Singh wrote: >> Add qcrypto and cryptobam DT nodes for enabling qcrypto on kaanapali. >> Shikra bam dma supports 7 iommus so update dt-bindings accordingly. >> >> The patchset depends on below. There's recursive dependency so referred >> to base DT patch here. >> - https://lore.kernel.org/all/20260512-shikra-dt-v1-0-716438330dd0@oss.qualcomm.com/ >> >> Validations: >> - make ARCH=arm64 DT_CHECKER_FLAGS=-m DT_SCHEMA_FILES=Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml dt_binding_check >> - make ARCH=arm64 qcom/shikra-cqs-evk.dtb CHECK_DTBS=1 DT_SCHEMA_FILES=Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml >> - cryptobam and crypto driver probe >> - kcapi test >> >> Signed-off-by: Kuldeep Singh > > What specific kernel features would this be useful for, and what > specific performance improvements are you seeing with those features? I hope you mean 7 iommu entries. Please note, shikra is an old platform and differs with latest platforms like kaanapali in terms of iommus#. Kaanapali is optimised(in terms of iommus#) as same pipe index/sid i.e 4/5 can be used for general purpose or for any other usecase like DRM/HDCP etc. Whereas for shikra, there's dedicated iommu entry for each usecase and same pipe index/sid cannot be used for other usecases. The performance will be be effectively similar. -- Regards Kuldeep