Re: [PATCH v3 1/5] KVM: PPC: Book3S HV: Validate arch_compat against host compatibility mode

[Madhavan Srinivasan <maddy@linux.ibm.com>]

On 6/3/26 9:03 AM, Vaibhav Jain wrote:
> Hi Ritesh, thanks for looking into this patch. My responses to your
> review comments inline below.
>
> Ritesh Harjani (IBM) <ritesh.list@gmail.com> writes:
>
>> Amit Machhiwal <amachhiw@linux.ibm.com> writes:
>>
>>> So, we would still want to prioritize the whole series
>>> instead of just this one patch.
>>>
>> Patch-1 could go as a bug fix even in 7.1-rc6 (or maybe with 7.2
>> bug fixes). - Maddy?
>>
>> So, you may want to add a fixes tag and maybe even cc stable if you are
>> seeing this issue from older kernels maybe when nestedv2 got introduced?
> This isnt a 'bug fix' per-se but rather strengthening of compat mode
> checks so that any non compatible PVR being used by the VMM can be
> caught early. The hypervisor anyway ultimately prevents non-compatible
> PVRs from being used by the VMM. So there isnt a bug thats being fixed
> in this patch.
>
> The rest of the patch series builds on top of this patch to advertise
> the available compatible PVRs to the VMM so that it can further
> preemptively prevent users from forcibly using a non-compatible PVR.
>
> Hence IMHO, this patch can be marked for stable tree and potential
> candidate for 7.2 merge window. But dont see applicability of a 'fixes'
> tag to this patch
amit, can you just post this alone as a separate patch, so that we could
pull it for 7.2 merge?


>> However the new UAPI discussion might still require more discussion with
>> the community and I don't think it is ready for 7.2 yet ;)
> Somewhat agree with the above
>
>> -ritesh
>>