On 12/15/23 15:11, Jonathon Jongsma wrote:
For SEV-SNP support we will need to be able to specify versioned CPU models
that are not yet available in libvirt. Rather than just adding a versioned CPU
or two that would satisfy that immediate need, I decided to try to add
versioned CPUs in a more standard way. This series generates CPU definitions
for all cpu versions that are defined in upstream qemu (at least for
recent Intel and AMD CPUs).
libvirt already provides a select subset of these versions as configurable CPU
models. But we only include the ones that have defined aliases in qemu, such as
EPYC-IBPB. After this patchset, all verisioned cpu models supported by qemu
will be available in libvirt.
In addition to adding these new versioned models, based on feedback from Daniel
Berrange, I've also translated all CPU model aliases to a specific version when
specifying a CPU model to qemu. This means that we will no longer specify e.g.
'-cpu EPYC' to qemu, but will rather specify '-cpu EPYC-v1'
Changes in v3:
- handle unversioned aliases
Changes in v2:
- don't make any changes to existing CPU models
- drop concept of aliases from libvirt and only provide new versioned models
that aren't already available via their qemu alias.
Jonathon Jongsma (12):
cpu_map: update script to handle versioned CPUs
cpu_map: add canonical names to existing CPU models
cpu: parse the canonical name from the cpu model
qemu: use canonical name for CPU models
cpu_map: Add versioned EPYC CPUs
cpu_map: Add versioned Intel Skylake CPUs
cpu_map: Add versioned Intel Cascadelake CPUs
cpu_map: Add versioned Intel Icelake CPUs
cpu_map: Add versioned Intel Cooperlake CPUs
cpu_map: Add versioned Intel Snowridge CPUs
cpu_map: Add versioned Intel SapphireRapids CPUs
cpu_map: Add versioned Dhyana CPUs
This series LGTM. We'll need a consensus on the comment block in the new CPU
files, and ideally the blessing of Jirka (or another with experience/history in
this area) before pushing. Regardless, I think it's material for the 10.2.0 dev
cycle at this point.
Note I've done a fair bit of testing with these patches, plus some SEV-SNP work
on top, but only on a EPYC Genoa machine. For the series:
Reviewed-by: Jim Fehlig <jfehlig@xxxxxxxx>
Regards,
Jim
_______________________________________________
Devel mailing list -- devel@xxxxxxxxxxxxxxxxx
To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxx
