Description of problem:
When starting a guest with some NUMA nodes and specific cores/sockets CPU topology, the guest complains about invalid ACPI tables.


Version-Release number of selected component (if applicable):
qemu-kvm-rhev-2.1.2-16.el7.x86_64
libvirt-1.2.8-9.el7.x86_64

How reproducible:
Always (when using config below). Couldn't reproduce when trying to simplify qemu-kvm command-line and remove a few options that seemed unrelated.

Steps to Reproduce:
1. Start VM using the attached libvirt XML configuration
2. Check guest dmesg

Actual results:
[root@localhost ~]# dmesg | egrep -i 'numa|srat|acpi'
[    0.000000] ACPI: RSDP 00000000000f1fe0 00014 (v00 BOCHS )
[    0.000000] ACPI: \xffffffff\xfffffffb?? 000000007ffff6d8 00000 (v208 \xffffffd0?A?\xffffffff\xffffffff \xffffffff\xffffffff\xffffffff\xffffffffCPU  6F420033  chs 04200400)
[    0.000000] ACPI BIOS Error (bug): Invalid table length 0x0 in RSDT/XSDT (20130517/tbutils-513)
[    0.000000] No NUMA configuration found
[    0.177064] ACPI: Interpreter disabled.
[    0.204876] pci 0000:00:01.3: quirk: [io  0x0600-0x063f] claimed by PIIX4 ACPI
[    0.259760] pnp: PnP ACPI: disabled
[    4.628306] ACPI Exception: AE_BAD_PARAMETER, Thread 2141639648 could not acquire Mutex [0x1] (20130517/utmutex-285)
[root@localhost ~]# 


Expected results:
NUMA topology and ACPI tables shouldn't be ignored.

Additional info:

libvirt XML:

<domain type='kvm'>
  <name>vm1</name>
  <uuid>e1c3ee44-f425-4a64-9720-18d1d0177588</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <memoryBacking>
    <hugepages>
      <page size='1048576' unit='KiB' nodeset='0-1'/>
    </hugepages>
  </memoryBacking>
  <vcpu placement='static'>40</vcpu>
  <numatune>
    <memnode cellid='0' mode='strict' nodeset='0'/>
    <memnode cellid='1' mode='strict' nodeset='1'/>
  </numatune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/> 
  </features>
  <cpu mode='host-model'>
    <model fallback='allow'/>
    <topology sockets='2' cores='10' threads='2'/>
    <numa> 
      <cell id='0' cpus='0-19' memory='1048576'/>
      <cell id='1' cpus='20-39' memory='1048576'/>
    </numa>
  </cpu>   
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/var/lib/libvirt/images/Fedora-x86_64-20-20131211.1-sda.qcow2'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <interface type='bridge'>
      <mac address='52:54:00:61:61:0d'/>
      <source bridge='virbr0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <serial type='file'>
      <source path='/tmp/vm1.console'/>
      <target port='1'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='tablet' bus='usb'/>
    <video>
      <model type='cirrus' vram='16384' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </video>
    <memballoon model='none'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'/>
</domain>  

QEMU command-line:
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -name vm1 -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Westmere,+rdtscp,+pdpe1gb,+dca,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pclmuldq,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 2048 -realtime mlock=off -smp 40,sockets=2,cores=10,threads=2 -object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,size=1024M,id=ram-node0,host-nodes=0,policy=bind -numa node,nodeid=0,cpus=0-19,memdev=ram-node0 -object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,size=1024M,id=ram-node1,host-nodes=1,policy=bind -numa node,nodeid=1,cpus=20-39,memdev=ram-node1 -uuid e1c3ee44-f425-4a64-9720-18d1d0177588 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm1.monitor,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/Fedora-x86_64-20-20131211.1-sda.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:61:61:0d,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev file,id=charserial1,path=/tmp/vm1.console -device isa-serial,chardev=charserial1,id=serial1 -device usb-tablet,id=input0 -device cirrus-vga,id=video0,bus=pci.0,addr=0x5 -msg timestamp=on