Hi Salil, The issues reported against on RFCv3 are still existing. I'm listing them as below.
(1) Guest fails to start due to SVE initialization /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ -accel kvm -machine virt,gic-version=host,nvdimm=on \ -cpu host -smp maxcpus=4,cpus=1,sockets=2,clusters=2,cores=1,threads=1 \ -m 4096M,slots=16,maxmem=128G \ -object memory-backend-ram,id=mem0,size=2048M \ -object memory-backend-ram,id=mem1,size=2048M \ : kvm_arch_init_vcpu: Error -22 from kvm_arm_sve_set_vls() qemu-system-aarch64: Failed to initialize host vcpu 1 Workaround: The SVE feature bits in ID_AA64PFR0 need to be masked off in kvm_arm_get_host_cpu_features() after the feature register's value is read from the host. (2) Fail to hot add vCPU whose PMU is turned off /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ -accel kvm -machine virt,gic-version=host,nvdimm=on \ -cpu host -smp maxcpus=4,cpus=1,sockets=2,clusters=2,cores=1,threads=1 \ -m 4096M,slots=16,maxmem=128G \ -object memory-backend-ram,id=mem0,size=2048M \ -object memory-backend-ram,id=mem1,size=2048M \ : (qemu) device_add host-arm-cpu,id=cpu1,socket-id=0,cluster-id=1,core-id=0,thread-id=0,pmu=off kvm_arch_init_vcpu: Error -22 from kvm_arm_vcpu_init() qemu-system-aarch64: kvm_init_vcpu: kvm_arch_init_vcpu failed (1): Invalid argument Workaround: Keep PMU on while the vCPU is hot added. Thanks, Gavin
