On Fri, Aug 30, 2024, Vitaly Kuznetsov wrote: > Gerd Hoffmann <kraxel@xxxxxxxxxx> writes: > > >> Necroposting! > >> > >> Turns out that this change broke "bochs-display" driver in QEMU even > >> when the guest is modern (don't ask me 'who the hell uses bochs for > >> modern guests', it was basically a configuration error :-). E.g: > > > > qemu stdvga (the default display device) is affected too. > > > > So far, I was only able to verify that the issue has nothing to do with > OVMF and multi-vcpu, it reproduces very well with > > $ qemu-kvm -machine q35,accel=kvm,kernel-irqchip=split -name guest=c10s > -cpu host -smp 1 -m 16384 -drive file=/var/lib/libvirt/images/c10s-bios.qcow2,if=none,id=drive-ide0-0-0 > -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 > -vnc :0 -device VGA -monitor stdio --no-reboot > > Comparing traces of working and broken cases, I couldn't find anything > suspicious but I may had missed something of course. For now, it seems > like a userspace misbehavior resulting in a segfault. Guest userspace?
