mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-11-05 04:41:20 +00:00
578ac25c6a
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>
22 lines
627 B
XML
22 lines
627 B
XML
<domain type='qemu'>
|
|
<name>test-bios</name>
|
|
<uuid>362d1fc1-df7d-193e-5c18-49a71bd1da66</uuid>
|
|
<memory unit='KiB'>1048576</memory>
|
|
<vcpu placement='static'>1</vcpu>
|
|
<os>
|
|
<type arch='x86_64' machine='pc'>hvm</type>
|
|
<loader stateless='yes' readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>
|
|
<nvram type='file'>
|
|
<source file='/var/lib/libvirt/nvram/guest_VARS.fd'/>
|
|
</nvram>
|
|
</os>
|
|
<features>
|
|
<acpi/>
|
|
</features>
|
|
<devices>
|
|
<emulator>/usr/bin/qemu-system-x86_64</emulator>
|
|
<controller type='usb' model='none'/>
|
|
<memballoon model='none'/>
|
|
</devices>
|
|
</domain>
|