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[Bug 1813165] Re: KVM internal error. Suberror: 1 emulation failure

From: Vitaly Kuznetsov
Subject: [Bug 1813165] Re: KVM internal error. Suberror: 1 emulation failure
Date: Mon, 09 Mar 2020 11:25:56 -0000

'nested' parameter for kvm_intel module controls whether you're able to
run nested configurations and it is enabled by default, it doesn't say
anything about whether your configuration is nested or not.

Could you please describe your environment? In case it is nested, it will look 
L0(host) Linux 5.4.0 .... with KVM
L1(guest) Linux xxxx with KVM
L2(nested guest) Linux xxxx

Note that L2 in this scenario is running "inside" L1 and that's why it
is nested.

Also, it is important to know if L1 or L2 in this configuration are UEFI
booted, it is not very important how you boot the host (L0).

You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.

  KVM internal error. Suberror: 1 emulation failure

Status in QEMU:

Bug description:
  Hello Devs.

  Having problems getting VM to run with qemu 3.1.0. I should mention
  it's a nested configuration.

  2019-01-24 13:46:08.648+0000: starting up libvirt version: 4.10.0, qemu 
version: 3.1.0, kernel: 4.14.94, hostname: one....
 HOME=/root USER=root QEMU_AUDIO_DRV=none /usr/bin/kvm -name 
guest=one-266,debug-threads=on -S -object 
 -machine pc-i440fx-2.9,accel=kvm,usb=off,dump-guest-core=off -cpu 
 -m 1024 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 
b219b45d-a2f0-4128-a948-8673a7abf968 -no-user-config -nodefaults -chardev 
socket,id=charmonitor,fd=21,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 
 -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -netdev 
tap,fd=23,id=hostnet0 -device 
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 
-vnc -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device 
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -sandbox 
on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg 
  char device redirected to /dev/pts/1 (label charserial0)
  KVM internal error. Suberror: 1
  emulation failure
  EAX=00000001 EBX=000f7c2c ECX=00000001 EDX=00000001
  ESI=00006a26 EDI=3ffbdc48 EBP=000069e6 ESP=000a8000
  EIP=000fd057 EFL=00010016 [----AP-] CPL=0 II=0 A20=1 SMM=1 HLT=0
  ES =0010 00000000 ffffffff 00c09300
  CS =0000 00000000 00000fff 00809b00
  SS =0010 00000000 ffffffff 00c09300
  DS =0010 00000000 ffffffff 00c09300
  FS =0010 00000000 ffffffff 00c09300
  GS =0010 00000000 ffffffff 00c09300
  LDT=0000 00000000 0000ffff 00008200
  TR =0000 00000000 0000ffff 00008b00
  GDT=     10387cfe 0000fe6c
  IDT=     0010387c 00003810
  CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
  DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 
  DR6=00000000fffecffc DR7=000000000e1e0400
  Code=cb 66 ba 4d d0 0f 00 e9 c8 fe bc 00 80 0a 00 e8 31 3a ff ff <0f> aa fa 
fc 66 ba 66 d0 0f 00 e9 b1 fe f3 90 f0 0f ba 2d ac 3b 0f 00 00 72 f3 8b 25 a8 3b
  2019-01-24T13:47:39.383366Z kvm: terminating on signal 15 from pid 2708 

  Someone has an idea whats going wrong here?

  thanks and cheers

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