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([2a01:e0a:f0e:9070:527b:9dff:feef:3874]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-46fb489ad27sm44666975e9.15.2025.10.10.05.04.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Oct 2025 05:04:40 -0700 (PDT) Message-ID: <3400cbc1-320d-4ddc-9172-21c3be89e32b@redhat.com> Date: Fri, 10 Oct 2025 14:04:39 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Did the latest QEMU emulated SMMUv3 not support "smmu sva" function ? Content-Language: en-US To: tugouxp <13824125580@163.com>, qemu-devel@nongnu.org References: <202836e9.238.199cb6c9c1f.Coremail.13824125580@163.com> From: Eric Auger In-Reply-To: <202836e9.238.199cb6c9c1f.Coremail.13824125580@163.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.129.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.441, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: eric.auger@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Hi, On 10/10/25 2:01 AM, tugouxp wrote: > Hi folks: >   i start my aacrh64 qemu platforms with command: > "qemu-system-aarch64 -m 512M -smp 4 -cpu cortex-a57 -machine > virt,*iommu=smmuv3* -kernel arch/arm64/boot/Image -append > "rdinit=/linuxrc nokaslr console=ttyAMA0 loglevel=8" -nographic" > and found it does not work normally with MULT substream(PASID), after > review the qemu smmuv3.c i made some discovery,  the smmu IDR1 > register  SSIDSIZE did not initialized for the default value of > emulated "SSIDSIZE" in SMMU IDR1 is 0, which means only support one > sub stream(pasid), so that is why does not work. I confirm PASIDs are not yet supported by the vSMMU. > > so here i want to get a information is that, did the latest qemu did > not support SVA mechanis about IOMMU ? and did all the others platfrom > like arm on this function?  thanks for your kindly help. vSVA is not yet supported either. This is under work in [PATCH v4 00/27] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Thanks Eric > >   > BRs > zlcao