Hello Mario.
The following commits were pulled into v5.18.11:
```
$ git log --oneline --no-merges v5.18.10..v5.18.11 | grep ACPI
2783414e6ef7 ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported
3068cfeca3b5 ACPI: CPPC: Only probe for _CPC if CPPC v2 is acked
8beb71759cc8 ACPI: bus: Set CPPC _OSC bits for all and when CPPC_LIB is supported
13bb696dd2f3 ACPI: CPPC: Check _OSC for flexible address space
```
and now this happens:
```
$ sudo modprobe amd-pstate shared_mem=1
modprobe: ERROR: could not insert 'amd_pstate': No such device
```
With v5.18.10 this worked just fine.
In your upstream commit 8b356e536e69f3a4d6778ae9f0858a1beadabb1f you write:
```
If there is additional breakage on the shared memory designs also
missing this _OSC, additional follow up changes may be needed.
```
So the question is what else should be pulled into the stable tree to unbreak amd-pstate?
Thanks.
--
Oleksandr Natalenko (post-factum)