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libvirt driver launching SEV-ES-encrypted instances
for OpenStack Compute (nova)
This work follows what was already done in https://blueprints.launchpad.net/nova/+spec/amd-sev-libvirt-support, to support SEV-enctypted instances.
AMD released new CPUs which supports new versions of SEV feature. One of them is SEV-ES which is already supported by underlying components such as kernel/qemu/libvirt/...
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libvirt driver launcing VMs with stateless firmware
for OpenStack Compute (nova)
Since v8.6.0, libvirt supports disabling NVRAM used by uefi bootloder
https://libvirt.org/formatdomain.html#bios-bootloader
```
loader
... In some cases, however, it may be desirable for the loader to run without any NVRAM, discarding any config changes on shutdown. The stateless flag (Since 8.6.0) can be used to c...
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Detect vTPM support by libvirt API
for OpenStack Compute (nova)
Libvirt 8.0.0 introduced the field to tell availability of TPM support[1]. This feature internally checks availability of swtpm[1].
We can use this feature instead of implementing the own logic to detect availability within nova. The feature in libvirt relies on libvirt itself, so allows us to ensure the swtpm bina...
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