Re: [BUG] x86: failed to boot a kernel on a Ryzen machine

[Satoru Takeuchi <satoru.takeuchi@gmail.com>]

At Mon, 24 Apr 2017 14:48:46 +0200,
Borislav Petkov wrote:
> 
> On Mon, Apr 24, 2017 at 09:39:12PM +0900, Satoru Takeuchi wrote:
> > I used the following auto-test tool (its backend is ktest).
> > 
> > https://github.com/satoru-takeuchi/elkdat
> > 
> > This problem can be reproduced by the following command on Ubuntu 16.04.
> > 
> > ```
> > $ sudo apt-get install git vagrant libvirt-bin libvirt-dev kernel-package qemu-kvm libssl-dev libncurses5-dev
> 
> Can you minimize that reproducer? I.e, can you dump only the qemu
> command line options from this setup?
> 
> They're enough to be able to start a guest with your config without me
> having to install all that other stuff.

OK. Is it sufficient information?

```
qemu-system-x86_64 -enable-kvm -name elkdat_ktest -S -machine pc-i440fx-xenial,accel=kvm,usb=off -cpu Opteron_G3,+smap,+adx,+rdseed,+bmi2,+smep,+avx2,+bmi1,+fsgsbase,+perfctr_nb,+perfctr_core,+topoext,+tce,+wdt,+skinit,+osvw,+3dnowprefetch,+cr8legacy,+extapic,+cmp_legacy,+pdpe1gb,+fxsr_opt,+mmxext,+rdrand,+f16c,+avx,+osxsave,+xsave,+aes,+movbe,+sse4.2,+sse4.1,+fma,+ssse3,+pclmuldq,+ht,+vme -m 512 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 12de0e96-5d01-4ab0-b0b3-165f55999960 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-elkdat_ktest/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/libvirt/images/elkdat_ktest.img,format=qcow2,if=none,id=drive-virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=26,id=hostnet0,vhost=on,vhostfd=28 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:e4:6f:3e,bus=pci.0,addr=0x5 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:0 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 -msg timestamp=on
```

Thanks,
Satoru

> 
> Thanks.
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> Good mailing practices for 400: avoid top-posting and trim the reply.