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
