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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@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=-0.444, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Hello Shameer, On 5/5/26 09:59, Shameer Kolothum Thodi wrote: > Hi Cédric, > >> -----Original Message----- >> From: Cédric Le Goater >> Sent: 04 May 2026 15:58 >> To: Nathan Chen ; qemu-arm@nongnu.org; qemu- >> devel@nongnu.org >> Cc: Eric Auger ; Peter Maydell >> ; Marcel Apfelbaum >> ; Philippe Mathieu-Daudé >> ; Yanan Wang ; Zhao Liu >> ; Shameer Kolothum Thodi >> ; Matt Ochs ; Nicolin Chen >> >> Subject: Re: [PATCH v2 0/7] hw/arm/smmuv3-accel: Resolve AUTO properties >> >> External email: Use caution opening links or attachments >> >> >> Hello Nathan, >> >> On 4/22/26 22:43, Nathan Chen wrote: >>> Hi, >>> >>> This series introduces support for resolving 'auto' for arm-smmuv3 >>> accelerated mode's ATS, RIL, SSIDSIZE, and OAS feature properties >>> based on host IOMMU capabilities. This is dependent on the series [0] >>> for changing these property types to accept 'auto' values. >>> >>> Accelerated SMMUv3 Address Translation Services support is derived >>> from IDR0, Range Invalidation support is derived from IDR3, Substream >>> ID size is derived from IDR1, and output address space is derived from >>> IDR5. >>> >>> The default values are set to 'auto' for all properties. If accel=off >>> and the values are set to 'auto' or are omitted and resolve to 'auto', >>> the default property values defined in smmuv3_init_id_regs() for OAS >>> and RIL will remain unchanged, while SSIDSIZE and ATS values will >>> remain initialized at 0. >>> >>> A complete branch can be found here: >>> https://github.com/NathanChenNVIDIA/qemu/tree/smmuv3-accel-auto- >> resolv >>> e-v2 >>> >>> Please take a look and let me know your feedback. >>> >>> Thanks, >>> Nathan >>> >>> [0] >>> https://lore.kernel.org/qemu-arm/20260323182454.1416110-1- >> nathanc@nvid >>> ia.com/ >>> >>> Example usage: >>> qemu-system-aarch64 \ >>> -object iommufd,id=iommufd0 \ >>> -machine virt,accel=kvm,gic-version=3,ras=on,highmem-mmio-size=4T \ >>> -cpu host -smp cpus=4 -m size=16G -nographic \ >>> -object memory-backend-ram,size=16G,id=m0 \ >>> -numa node,memdev=m0,cpus=0-3,nodeid=0 \ >>> -numa node,nodeid=1 -numa node,nodeid=2 -numa node,nodeid=3 - >> numa node,nodeid=4 \ >>> -numa node,nodeid=5 -numa node,nodeid=6 -numa node,nodeid=7 - >> numa node,nodeid=8 \ >>> -device pxb-pcie,id=pcie.1,bus_nr=1,bus=pcie.0,numa_node=0 \ >>> -device arm-smmuv3,primary- >> bus=pcie.1,id=smmuv3.1,accel=on,ats=auto,ssidsize=auto,ril=auto,oas=auto \ >>> -device pcie-root-port,id=pcie.port1,bus=pcie.1,chassis=1,io-reserve=0 \ >>> -device vfio-pci- >> nohotplug,host=0009:06:00.0,bus=pcie.port1,rombar=0,id=dev0,iommufd=i >> ommufd0,ats=auto \ >>> -object acpi-generic-initiator,id=gi0,pci-dev=dev0,node=1 \ >>> -object acpi-generic-initiator,id=gi1,pci-dev=dev0,node=2 \ >>> -object acpi-generic-initiator,id=gi2,pci-dev=dev0,node=3 \ >>> -object acpi-generic-initiator,id=gi3,pci-dev=dev0,node=4 \ >>> -object acpi-generic-initiator,id=gi4,pci-dev=dev0,node=5 \ >>> -object acpi-generic-initiator,id=gi5,pci-dev=dev0,node=6 \ >>> -object acpi-generic-initiator,id=gi6,pci-dev=dev0,node=7 \ >>> -object acpi-generic-initiator,id=gi7,pci-dev=dev0,node=8 \ >>> -bios /usr/share/AAVMF/AAVMF_CODE.fd \ >>> -device nvme,drive=nvme0,serial=deadbeaf1,bus=pcie.0 \ >>> -drive >> file=/var/lib/libvirt/images/guest.qcow2,index=0,media=disk,format=qcow2,if >> =none,id=nvme0 \ >>> -device e1000,romfile=/usr/local/share/qemu/efi- >> e1000.rom,netdev=net0,bus=pcie.0 \ >>> -netdev user,id=net0,hostfwd=tcp::5558-:22,hostfwd=tcp::5586-:5586 >>> >>> Testing: >>> Basic sanity testing was performed on an NVIDIA Grace platform with >>> GPU device assignment and running CUDA test apps on the guest. >>> Observed the feature properties being set based on host IOMMU >> capabilities. >>> Verified that the VM boot will fail without a cold-plugged device, and >>> that a hot-plugged device re-uses the resolved values from the initial >>> cold-plug. Additional testing and feedback are welcome. >> >> It is helpful to have a changelog between different versions of the same series >> of patches. >> >> So, the linux headers and vfio update are not required anymore ? > > Just jumping in as Nathan is on PTO. > > My understanding is that the Linux headers and VFIO updates are not > included in this series because, based on previous feedback, the > ATS related VFIO changes will be sent as an independent series. OK. The linux headers update is handled here : https://lore.kernel.org/qemu-devel/20260427070029.1059386-1-gaosong@loongson.cn/ We should help Song Gao. The VFIO part adding an ats property : https://lore.kernel.org/qemu-devel/20260401010231.4166776-5-nathanc@nvidia.com/ will need an update. Thanks, C.