Hi Colin, I didn't read much if the details but I think it is clear. Per request of IBM focal got -march=z13 but tcg has no emulation for some of the instructions of this cpu.
That is the breakage that you are seeing and afaik there is nothing we can do than waiting for qemu to grow that support. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1852781 Title: qemu s390x on focal - applications breaking Status in QEMU: New Bug description: Running qemu-system-s390x (1:4.0+dfsg-0ubuntu10) on an x86-64 Focal host with an upgrade of a Eoan s390x VM to a Focal s390x is triggering random breakage, for example: sudo apt-get update && sudo apt-get dist-upgrade ... ... Unpacking debianutils (4.9) over (4.8.6.3) ... Setting up debianutils (4.9) ... Use of uninitialized value $ARGV[0] in string ne at /usr/sbin/update-mime line 43. (Reading database ... 83640 files and directories currently installed.) Preparing to unpack .../bash_5.0-5ubuntu1_s390x.deb ... Unpacking bash (5.0-5ubuntu1) over (5.0-4ubuntu1) ... Setting up bash (5.0-5ubuntu1) ... [12124.788618] User process fault: interruption code 0007 ilc:3 in bash[2aa3d780000+149000] dpkg: error processing package bash (--configure): installed bash package post-installation script subprocess was killed by signal (Floating point exception), core du mped Errors were encountered while processing: bash E: Sub-process /usr/bin/dpkg returned an error code (1) And now bash is completely broken: cking@eoan-s390x:~$ bash [12676.204389] User process fault: interruption code 0007 ilc:3 in bash[2aa14780000+149000] Floating point exception (core dumped) The upgrade works OK on a s390x, so I'm assuming it's something to do with the qemu emulation. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1852781/+subscriptions
