Confirmed the fix, thanks for the help. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1815143
Title: qemu-system-s390x fails when running without kvm: fatal: EXECUTE on instruction prefix 0x7f4 not implemented Status in QEMU: Fix Released Bug description: just wondering if TCG implements instruction prefix 0x7f4 server3:~ # zcat /boot/vmlinux-4.4.162-94.72-default.gz > /tmp/kernel --> starting qemu with kvm enabled works fine server3:~ # qemu-system-s390x -nographic -kernel /tmp/kernel -initrd /boot/initrd -enable-kvm Initializing cgroup subsys cpuset Initializing cgroup subsys cpu Initializing cgroup subsys cpuacct Linux version 4.4.162-94.72-default (geeko@buildhost) (gcc version 4.8.5 (SUSE Linux) ) #1 SMP Mon Nov 12 18:57:45 UTC 2018 (9de753f) setup.289988: Linux is running under KVM in 64-bit mode setup.b050d0: The maximum memory size is 128MB numa.196305: NUMA mode: plain Write protected kernel read-only data: 8692k [...] --> but starting qemu without kvm enabled works fails server3:~ # qemu-system-s390x -nographic -kernel /tmp/kernel -initrd /boot/initrd qemu: fatal: EXECUTE on instruction prefix 0x7f4 not implemented PSW=mask 0000000180000000 addr 000000000067ed6e cc 00 R00=0000000080000000 R01=000000000067ed76 R02=0000000000000000 R03=0000000000000000 R04=0000000000111548 R05=0000000000000000 R06=0000000000000000 R07=0000000000000000 R08=00000000000100f6 R09=0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000ae2000 R13=0000000000681978 R14=0000000000111548 R15=000000000000bef0 F00=0000000000000000 F01=0000000000000000 F02=0000000000000000 F03=0000000000000000 F04=0000000000000000 F05=0000000000000000 F06=0000000000000000 F07=0000000000000000 F08=0000000000000000 F09=0000000000000000 F10=0000000000000000 F11=0000000000000000 F12=0000000000000000 F13=0000000000000000 F14=0000000000000000 F15=0000000000000000 V00=00000000000000000000000000000000 V01=00000000000000000000000000000000 V02=00000000000000000000000000000000 V03=00000000000000000000000000000000 V04=00000000000000000000000000000000 V05=00000000000000000000000000000000 V06=00000000000000000000000000000000 V07=00000000000000000000000000000000 V08=00000000000000000000000000000000 V09=00000000000000000000000000000000 V10=00000000000000000000000000000000 V11=00000000000000000000000000000000 V12=00000000000000000000000000000000 V13=00000000000000000000000000000000 V14=00000000000000000000000000000000 V15=00000000000000000000000000000000 V16=00000000000000000000000000000000 V17=00000000000000000000000000000000 V18=00000000000000000000000000000000 V19=00000000000000000000000000000000 V20=00000000000000000000000000000000 V21=00000000000000000000000000000000 V22=00000000000000000000000000000000 V23=00000000000000000000000000000000 V24=00000000000000000000000000000000 V25=00000000000000000000000000000000 V26=00000000000000000000000000000000 V27=00000000000000000000000000000000 V28=00000000000000000000000000000000 V29=00000000000000000000000000000000 V30=00000000000000000000000000000000 V31=00000000000000000000000000000000 C00=0000000000000000 C01=0000000000000000 C02=0000000000000000 C03=0000000000000000 C04=0000000000000000 C05=0000000000000000 C06=0000000000000000 C07=0000000000000000 C08=0000000000000000 C09=0000000000000000 C10=0000000000000000 C11=0000000000000000 C12=0000000000000000 C13=0000000000000000 C14=0000000000000000 C15=0000000000000000 Aborted (core dumped) server3:~ # lscpu Architecture: s390x CPU op-mode(s): 32-bit, 64-bit Byte Order: Big Endian CPU(s): 2 On-line CPU(s) list: 0,1 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s) per book: 1 Book(s) per drawer: 1 Drawer(s): 2 NUMA node(s): 1 Vendor ID: IBM/S390 Machine type: 2964 BogoMIPS: 20325.00 Hypervisor: z/VM 6.4.0 Hypervisor vendor: IBM Virtualization type: full Dispatching mode: horizontal L1d cache: 128K L1i cache: 96K L2d cache: 2048K L2i cache: 2048K L3 cache: 65536K L4 cache: 491520K NUMA node0 CPU(s): 0-63 Flags: esan3 zarch stfle msa ldisp eimm dfp edat etf3eh highgprs te vx sie server3:~ # uname -a Linux server3 4.4.126-94.22-default #1 SMP Wed Apr 11 07:45:03 UTC 2018 (9649989) s390x s390x s390x GNU/Linux server3:~ # To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1815143/+subscriptions
