I have a server with an Intel Platinum CPU:
https://ark.intel.com/products/120505/Intel-Xeon-Platinum-8176M-Processor-38_5M-Cache-2_10-GHz
It's running Fedora 27 Server, kernel version 4.14.8-300.fc27.x86_64,
qemu-system-x86-core-2.10.1-2.fc27.x86_64
I'm starting qemu like this:
/usr/bin/qemu-system-x86_64 -machine accel=kvm -name
guest=test,debug-threads=on -S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-6-test/master-key.aes
-machine pc-i440fx-2.10,accel=kvm,usb=off,dump-guest-core=off -cpu
Skylake-Client,hypervisor=on -m 32768 -realtime mlock=off -smp
16,sockets=2,cores=8,threads=1 -uuid
6427e485-5aee-4fb6-b5e5-a80c1dc0f4af -no-user-config -nodefaults
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-6-test/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=delay
-no-shutdown -boot strict=on -device
piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
file=/var/tmp/cd62.iso,format=raw,if=none,id=drive-ide0-1-0,readonly=on
-device
ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=1
-netdev tap,fd=29,id=hostnet0,vhost=on,vhostfd=32 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=56:00:00:27:d6:3f,bus=pci.0,addr=0x3,rombar=0,bootindex=3
-device usb-tablet,id=input0,bus=usb.0,port=1 -vnc
127.0.0.1:4788,websocket=40688 -device
cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -object
rng-random,id=objrng0,filename=/dev/random -device
virtio-rng-pci,rng=objrng0,id=rng0,bus=pci.0,addr=0x6 -msg timestamp=on
I do not have a functional OpenBSD install here, this happens even when
I try to boot off the ISO.
OpenBSD hangs after printing:
pciide0 at pci0 dev 1 function 1 "Intel 82371SB IDE" rev 0x00: DMA,
channel 0 wired to compatibility, channel 1 wired to compatibility
There is a flashing "_" cursor, but I'm unable to interact with it in
any way.
I tried setting this to use an older CPU type, which changed the -cpu
flag to be "-cpu Nehalem,vme=off,x2apic=off,hypervisor=off", but this
did not seem to have any effect.
If I boot the VM with 'boot -c', then 'disable pciide*', I can actually
get to the 'Welcome to the OpenBSD/amd64 6.2 installation program'
prompt, but then the machine hangs whenever I type 'A'. If I choose
another option ('I'), I can get partially through the install before it
hangs. The hangs at that point seem to be random.
I've attached a screenshot of where it's hanging during the initial boot.
So far we've been able to reproduce this on all of our Intel Scalable
processors, which includes a few other Gold CPUs. This does work ok on
our older E5 CPUs
