[Qemu-devel] [Bug 1623276] Re: qemu 2.7 / iPXE crash

[Laszlo Ersek \(Red Hat\)]

Can you post the host dmesg that is written at the time of the guest
crash?

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Title:
  qemu 2.7 / iPXE crash

Status in QEMU:
  New

Bug description:
  I am running Arch linux

  vanilla 4.7.2 kernel
  qemu 2.7
  libvirt 2.2.0
  virt-manager 1.4.0

  
  Since the upgrade from qemu 2.6.1 to 2.7 a few days ago. I'm no longer
  able to PXE boot at all. Everything else appears to function normally.
  Non PXE booting and everything else is perfect. Obviously have
  restarted everying etc. Have tried the various network drivers also.

  This occurs on domains created with 2.6.1 or with 2.7

  When I choose PXE boot, the machine moves to a paused state (crashed)
  immediately after the 'starting PXE rom execution...' message appears.

  Reverting to qemu 2.6.1 package corrects the issue.

  The qemu.log snippet follows below.

  I'm not sure how to troubleshoot this problem to determine if it's a
  packaging error by the distribution or a problem with qemu/kvm/kernel?

  Any help would be much appreciated - Thanks,
  Greg

  --- qemu.log:

  
  2016-09-12 16:36:33.867+0000: starting up libvirt version: 2.2.0, qemu
  version: 2.7.0, hostname: seneca
  LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
  QEMU_AUDIO_DRV=spice /usr/sbin/qemu-system-x86_64 -name guest=c,debug-
  threads=on -S -object
  secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-6-
  c/master-key.aes -machine pc-i440fx-2.7,accel=kvm,usb=off,vmport=off
  -cpu Nehalem -m 2048 -realtime mlock=off -smp
  1,sockets=1,cores=1,threads=1 -uuid 348009be-26d5-4dc7-b515-
  e8b45f5117ac -no-user-config -nodefaults -chardev
  socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-6-
  c/monitor.sock,server,nowait -mon
  chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew
  -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global
  PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot
  menu=on,strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7
  -device ich9-usb-
  uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6
  -device ich9-usb-
  uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 -device ich9-
  usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 -device
  virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive
  file=/var/lib/libvirt/images/c.qcow2,format=qcow2,if=none,id=drive-
  virtio-disk0 -device virtio-blk-
  pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-
  disk0,bootindex=1 -netdev tap,fd=28,id=hostnet0 -device
  rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:a0:95:7c,bus=pci.0,addr=0x
  3 -chardev pty,id=charserial0 -device isa-
  serial,chardev=charserial0,id=serial0 -chardev
  socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain
  -6-c/org.qemu.guest_agent.0,server,nowait -device
  virtserialport,bus=virtio-
  serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_age
  nt.0 -chardev spicevmc,id=charchannel1,name=vdagent -device
  virtserialport,bus=virtio-
  serial0.0,nr=2,chardev=charchannel1,id=channel1,name=com.redhat.spice.0
  -device usb-tablet,id=input0,bus=usb.0,port=1 -spice
  port=5901,addr=127.0.0.1,disable-ticketing,image-
  compression=off,seamless-migration=on -device qxl-
  vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vga
  mem_mb=16,max_outputs=1,bus=pci.0,addr=0x2 -device intel-
  hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-
  codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir
  -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2
  -chardev spicevmc,id=charredir1,name=usbredir -device usb-
  redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device virtio-
  balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on
  char device redirected to /dev/pts/0 (label charserial0)
  main_channel_link: add main channel client
  red_dispatcher_set_cursor_peer: 
  inputs_connect: inputs channel client create
  KVM internal error. Suberror: 1
  emulation failure
  EAX=801a8d00 EBX=000000a0 ECX=00002e20 EDX=0009d5e8
  ESI=7ffa3c00 EDI=7fef4000 EBP=ffffffff ESP=00007b92
  EIP=000006ab EFL=00000087 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0
  ES =0000 00000000 ffffffff 00c09300
  CS =9c4c 0009c4c0 ffffffff 00809b00
  SS =0000 00000000 ffffffff 00809300
  DS =9cd0 0009cd00 ffffffff 00c09300
  FS =0000 00000000 ffffffff 00c09300
  GS =0000 00000000 ffffffff 00c09300
  LDT=0000 00000000 0000ffff 00008200
  TR =0000 00000000 0000ffff 00008b00
  GDT=     00000000 00000000
  IDT=     00000000 000003ff
  CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
  DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
  DR3=0000000000000000 
  DR6=00000000ffff0ff0 DR7=0000000000000400
  EFER=0000000000000000
  Code=00 16 66 9c 66 60 0f a8 0f a0 06 1e 16 0e fa 2e 8e 1e 90 06 <0f>
  ae 06 d0 1c 0f 01 0e c6 1c 0f 01 06 c0 1c fc 66 b9 38 00 00 00 66 ba 10
  02 00 00 66 68

  
  --- /proc/cpuinfo
  processor       : 0
  vendor_id       : GenuineIntel
  cpu family      : 6
  model           : 26
  model name      : Intel(R) Core(TM) i7 CPU         950  @ 3.07GHz
  stepping        : 5
  microcode       : 0x11
  cpu MHz         : 3066.648
  cache size      : 8192 KB
  physical id     : 0
  siblings        : 8
  core id         : 0
  cpu cores       : 4
  apicid          : 0
  initial apicid  : 0
  fpu             : yes
  fpu_exception   : yes
  cpuid level     : 11
  wp              : yes
  flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
  pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
  syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl
  xtopology nonstop_tsc aperfmperf eagerfpu pni dtes64 monitor ds_cpl vmx
  est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm tpr_shadow
  vnmi flexpriority ept vpid dtherm
  bugs            :
  bogomips        : 6135.85
  clflush size    : 64
  cache_alignment : 64
  address sizes   : 36 bits physical, 48 bits virtual
  power management:

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