On 2026-09-14 23:03, Xin Li wrote:
>
>> On Sep 11, 2026, at 2:36 PM, Sohil Mehta <[email protected]> wrote:
>>
>> I mainly rebased the patches to the latest kvm-x86/next branch and fixed
>> a handful of issues reported during internal testing and basic AI
>> reviews. I've avoided making any major code changes or commit message
>> updates as this is the first iteration that I am posting.
>
> Thanks a lot for taking care of the patch series.
>
>>
>> Going forward, based on the feedback, I'll rework the patches as needed.
>> I've listed a few opens below that need additional discussion or
>> clarification. I'm relatively new to the KVM subsystem, so please feel
>> free to provide suggestions on the series structure, code organization
>> as well as commit log clarity to smoothen the review process.
>
> I’ve been thinking about an optimization: because FRED drops most of the old
>
> syscall MSRs (IA32_LSTAR/IA32_CSTAR/IA32_SFMASK), we should be able to omit
>
> them from KVM's uret MSR tracking entirely as if host enables FRED (no matter
>
> whether a guest uses FRED).
>
Yes, although they will need to be handled properly between VCPU switches, of
course.
-hpa
