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Starting from qemu 2.11, the `-device vmcoreinfo` will create a fw_cfg entry for a guest to store dump details, necessary to process kernel dump with KASLR enabled and providing additional kernel details. In essence, it is similar to -fw_cfg name=etc/vmcoreinfo,file=X but in this case it is not backed by a file, but collected by QEMU itself. Since the device is a singleton and shouldn't use additional hardware resources, it is presented as a <feature> element in the libvirt domain XML. The device is arm/x86 only for now (targets that support fw_cfg+dma). Related to: https://bugzilla.redhat.com/show_bug.cgi?id=1395248 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
39 lines
1.3 KiB
XML
39 lines
1.3 KiB
XML
<domain type='qemu'>
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<name>QEMUGuest1</name>
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<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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<memory unit='KiB'>219100</memory>
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<currentMemory unit='KiB'>219100</currentMemory>
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<vcpu placement='static'>1</vcpu>
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<os>
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<type arch='i686' machine='pc'>hvm</type>
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<boot dev='hd'/>
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</os>
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<features>
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<vmcoreinfo/>
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</features>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<emulator>/usr/bin/qemu-system-i686</emulator>
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<disk type='block' device='disk'>
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<source dev='/dev/HostVG/QEMUGuest1'/>
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<target dev='hda' bus='ide'/>
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<address type='drive' controller='0' bus='0' target='0' unit='0'/>
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</disk>
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<controller type='ide' index='0'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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</controller>
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<controller type='usb' index='0'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
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</controller>
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<controller type='pci' index='0' model='pci-root'/>
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<input type='mouse' bus='ps2'/>
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<input type='keyboard' bus='ps2'/>
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<memballoon model='virtio'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
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</memballoon>
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</devices>
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</domain>
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