[pve-devel] applied-series: [PATCH-SERIES v6 qemu-server/manager] add and set x86-64-v2-AES as default model for new vms

[Fiona Ebner]

Am 08.06.23 um 11:51 schrieb Alexandre Derumier:
> 
> Hi,
> 
> we used kvm64 as default cpumodel since the begin of proxmox. (basically, it's like a pentium4 cpu flags).
> 
> New distros like rhel9 are compiled to use more modern cpu flags.
> (and windows already use new flags since year, and we already add some extra cpu flags)
> 
> "
> In 2020, AMD, Intel, Red Hat, and SUSE worked together to define
> three microarchitecture levels on top of the historical x86-64
> baseline:
> 
>   * x86-64-v1: original x86_64 baseline instruction set
>   * x86-64-v2: vector instructions up to Streaming SIMD
>                Extensions 4.2 (SSE4.2)  and Supplemental
>                Streaming SIMD Extensions 3 (SSSE3), the
>                POPCNT instruction, and CMPXCHG16B
>   * x86-64-v3: vector instructions up to AVX2, MOVBE,
>                and additional bit-manipulation instructions.
>   * x86-64-v4: vector instructions from some of the
>                AVX-512 variants.
> 
> "
> 
> 
> This patch series add new models inspired from a patch was found on qemu mailing, but never appplied
> 
> https://lore.kernel.org/all/20210526144038.278899-1-berrange@redhat.com/T/
> 
> 
> In addition to theses model, I have enabled aes too.
> I think it's really important, because a lot of users use default values and have
> bad performance with ssl and other crypto stuffs.
>

applied series, thanks!

We could bump the dependency pve-manager -> qemu-server, but when having
different versions across nodes, one would still run into an issue if
the backend doesn't know the new model, so not sure if worth it.