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Normally when an UEFI firmware is marked as read-only, an associated NVRAM file will be created. Some builds of UEFI firmware, however, wish to remain stateless and so will be read-only, but never have any NVRAM file. To represent this concept a 'stateless' tristate bool attribute is introduced on the <loader/> element. There are rather a large number of permutations to consider. With default firmware selection * <os/> => Historic default, no change * <os> <loader stateless='yes'/> </os> => Explicit version of historic default, no change * <os> <loader stateless='no'/> </os> => Invalid, bios is always stateless With manual legacy BIOS selection * <os> <loader>/path/to/seabios</loader> ... </os> => Historic default, no change * <os> <loader stateless='yes'>/path/to/seabios</loader> ... </os> => Explicit version of historic default, no change * <os> <loader stateless='no'>/path/to/seabios</loader> ... </os> => Invalid, bios is always stateless With manual UEFI selection * <os> <loader type='pflash'>/path/to/edk2</loader> ... </os> => Historic default, no change * <os> <loader type='pflash' stateless='yes'>/path/to/edk2</loader> ... </os> => Skip auto-filling NVRAM / template * <os> <loader type='pflash' stateless='no'>/path/to/edk2</loader> ... </os> => Explicit version of historic default, no change With automatic firmware selection * <os firmware='bios'/> => Historic default, no change * <os firmware='bios'> <loader stateless='yes'/> </os> => Explicit version of historic default, no change * <os firmware='bios'> <loader stateless='no'/> </os> => Invalid, bios is always stateless * <os firmware='uefi'/> => Historic default, no change * <os firmware='uefi'> <loader stateless='yes'/> </os> => Skip auto-filling NVRAM / template * <os firmware='uefi'> <loader stateless='no'/> </os> => Explicit version of historic default, no change Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
35 lines
1.1 KiB
XML
35 lines
1.1 KiB
XML
<domain type='kvm'>
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<name>fedora</name>
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<uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
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<memory unit='KiB'>8192</memory>
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<currentMemory unit='KiB'>8192</currentMemory>
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<vcpu placement='static'>1</vcpu>
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<os firmware='bios'>
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<type arch='x86_64' machine='pc-q35-4.0'>hvm</type>
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<loader stateless='yes'/>
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<boot dev='hd'/>
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</os>
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<features>
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<acpi/>
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</features>
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<cpu mode='custom' match='exact' check='none'>
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<model fallback='forbid'>qemu64</model>
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</cpu>
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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-x86_64</emulator>
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<controller type='usb' index='0' model='none'/>
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<controller type='sata' index='0'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
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</controller>
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<controller type='pci' index='0' model='pcie-root'/>
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<input type='mouse' bus='ps2'/>
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<input type='keyboard' bus='ps2'/>
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<audio id='1' type='none'/>
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<memballoon model='none'/>
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</devices>
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</domain>
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