Hello community experts, I am facing an issue to migrate a virtual machine from qemu 2.11 to qemu 4.2 node. The command using on src node is
*qemu-system-aarch64 -M virt -vnc :2 -rtc base=utc,driftfix=slew -smp 2 -m 4096 -cpu host -enable-kvm -nodefaults -incoming :4443* on the dst node, the command is *qemu-system-aarch64 -M virt-2.11 -enable-kvm -cpu host -smp 2 -m 4096 -incoming tcp::4443 -rtc base=utc,driftfix=slew -nodefaults * after running migrate tcp:localhost:4443, the dest machine failed with following message Segmentation fault (core dumped) I try to debug and find the following trace: *0x0000aaab0f07262c in armv7m_nvic_neg_prio_requested (opaque=0x0, secure=false) at /root/qemu-4.2.1/hw/intc/armv7m_nvic.c:391*. After some investigation, I believe the issue is from *https://elixir.bootlin.com/qemu/v4.2.1/source/target/arm/helper.c#L11134 <https://elixir.bootlin.com/qemu/v4.2.1/source/target/arm/helper.c#L11134>* and *ARM_FEATURE_M *'s value is changed from 2.11 to 4.2. My question is do we support migrating from 2.11 to 4.2 on aarch64 platform? Thank you much for the help -- Best Regards, Jiatong Shen
