[Reminder] Feature Freeze is Fri Aug 29, 2025

[Reminder] Feature Freeze is Fri Aug 29, 2025

[Oleksii Kurochko]

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Hello community,

I’d like to remind everyone that the Feature Freeze deadline is approaching,
and we still have some outstanding requests from the community for patch series
to be merged into 4.21:

1. Enable guest suspend/resume support on ARM via vPSCI [1]
2. Introduce SCI SCMI SMC multi-agent support [2]
3. Introduce eSPI support [3]
4. FRED work: [4], [5], possibly others (?)
5. Introduce CONFIG_DOMCTL [6]
6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
7. Some other patch series I missed.

It looks like some of these patch series still require additional work,
and I’m not sure there is enough time left before the end of this week.

Could I kindly ask for an estimation of whether these tasks can be completed in time?

[1]https://lore.kernel.org/xen-devel/87jz2vaq9h.fsf@epam.com/
[2]https://lore.kernel.org/xen-devel/cover.1753184487.git.oleksii_moisieiev@epam.com/
[3]https://lore.kernel.org/xen-devel/7e6477a83ab65220ef1c5dd22f4ef3536fbbdd5c.1754568795.git.leonid_komarianskyi@epam.com/

[4]https://lore.kernel.org/xen-devel/20250808202314.1045968-1-andrew.cooper3@citrix.com/
[5]https://lore.kernel.org/xen-devel/20250815204117.3312742-1-andrew.cooper3@citrix.com/

[6]https://lore.kernel.org/xen-devel/20250803094738.3625269-6-Penny.Zheng@amd.com/
[7]https://lore.kernel.org/xen-devel/20250815102728.1340505-1-Penny.Zheng@amd.com/

Thanks in advance.

Best regards,
   Oleksii

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Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Jan Beulich]

On 25.08.2025 17:50, Oleksii Kurochko wrote:
> Hello community,
> 
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
> 
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]

As per a mail sent earlier today, for these two we will need to settle on
which route to take, including the consideration of whether the work can
realistically be completed in time (or whether an upfront exception could
be granted).

Jan

> 7. Some other patch series I missed.
> 
> It looks like some of these patch series still require additional work,
> and I’m not sure there is enough time left before the end of this week.
> 
> Could I kindly ask for an estimation of whether these tasks can be completed in time?
> 
> [1]https://lore.kernel.org/xen-devel/87jz2vaq9h.fsf@epam.com/
> [2]https://lore.kernel.org/xen-devel/cover.1753184487.git.oleksii_moisieiev@epam.com/
> [3]https://lore.kernel.org/xen-devel/7e6477a83ab65220ef1c5dd22f4ef3536fbbdd5c.1754568795.git.leonid_komarianskyi@epam.com/
> 
> [4]https://lore.kernel.org/xen-devel/20250808202314.1045968-1-andrew.cooper3@citrix.com/
> [5]https://lore.kernel.org/xen-devel/20250815204117.3312742-1-andrew.cooper3@citrix.com/
> 
> [6]https://lore.kernel.org/xen-devel/20250803094738.3625269-6-Penny.Zheng@amd.com/
> [7]https://lore.kernel.org/xen-devel/20250815102728.1340505-1-Penny.Zheng@amd.com/
> 
> Thanks in advance.
> 
> Best regards,
>    Oleksii
> 

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Jason Andryuk]

On 2025-08-25 11:50, Oleksii Kurochko wrote:
> Hello community,
> 
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
> 
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.

Hi Oleksii,

I'd like to get 
https://lore.kernel.org/xen-devel/20250822213946.245307-1-jason.andryuk@amd.com/T/#t 
in if possible.

It's v2, and there were 3 RFC postings before the v1 as well.

Thanks,
Jason

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Jan Beulich]

On 25.08.2025 17:50, Oleksii Kurochko wrote:
> Hello community,
> 
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
> 
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.

"amd-cppc CPU Performance Scaling Driver" has been pending for quite a while,
and really ought to make it imo. I'm inclined to say even if an exception was
needed. Parts have gone in, I'm about to commit more parts, but whether
everything would be in by Friday I can't predict.

Jan

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Oleksii Kurochko]

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+ Penny Zheng

On 8/26/25 7:55 AM, Jan Beulich wrote:
> On 25.08.2025 17:50, Oleksii Kurochko wrote:
>> Hello community,
>>
>> I’d like to remind everyone that the Feature Freeze deadline is approaching,
>> and we still have some outstanding requests from the community for patch series
>> to be merged into 4.21:
>>
>> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
>> 2. Introduce SCI SCMI SMC multi-agent support [2]
>> 3. Introduce eSPI support [3]
>> 4. FRED work: [4], [5], possibly others (?)
>> 5. Introduce CONFIG_DOMCTL [6]
>> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
>> 7. Some other patch series I missed.
> "amd-cppc CPU Performance Scaling Driver" has been pending for quite a while,
> and really ought to make it imo. I'm inclined to say even if an exception was
> needed. Parts have gone in, I'm about to commit more parts, but whether
> everything would be in by Friday I can't predict.

Considering that only a few patches are required to receive Ack/Reviewed-by,
this could be considered for inclusion in 4.21.

Penny, do you have some time to provide a new version of the "amd-cppc CPU
Performance Scaling Driver" patch series?

~ Oleksii

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RE: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Penny, Zheng]

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[Public]



From: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Sent: Tuesday, August 26, 2025 11:57 PM
To: Jan Beulich <jbeulich@suse.com>; Penny, Zheng <penny.zheng@amd.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>; Community Manager <community.manager@xenproject.org>; committers@xenproject.org
Subject: Re: [Reminder] Feature Freeze is Fri Aug 29, 2025


+ Penny Zheng
On 8/26/25 7:55 AM, Jan Beulich wrote:

On 25.08.2025 17:50, Oleksii Kurochko wrote:

Hello community,



I’d like to remind everyone that the Feature Freeze deadline is approaching,

and we still have some outstanding requests from the community for patch series

to be merged into 4.21:



1. Enable guest suspend/resume support on ARM via vPSCI [1]

2. Introduce SCI SCMI SMC multi-agent support [2]

3. Introduce eSPI support [3]

4. FRED work: [4], [5], possibly others (?)

5. Introduce CONFIG_DOMCTL [6]

6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]

7. Some other patch series I missed.



"amd-cppc CPU Performance Scaling Driver" has been pending for quite a while,

and really ought to make it imo. I'm inclined to say even if an exception was

needed. Parts have gone in, I'm about to commit more parts, but whether

everything would be in by Friday I can't predict.

Considering that only a few patches are required to receive Ack/Reviewed-by,

this could be considered for inclusion in 4.21.

Penny, do you have some time to provide a new version of the "amd-cppc CPU

Performance Scaling Driver" patch series?



Absolutely, I’ll push a new version before Friday



~ Oleksii

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Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Andrew Cooper]

On 25/08/2025 4:50 pm, Oleksii Kurochko wrote:
> Hello community,
>
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
>
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)

For FRED, That's all that's out on the list.

I've got an update to 4 almost ready to post, this time getting to dev
complete.

Unfortunately, I've still not managed to get any time on real hardware
yet, so FRED will still be experimental in my series.  (The timelines
were originally compatible with Xen 4.21, but access to hardware has not
been as forthcoming as hoped.)

When I can test on real hardware, there may be bugfixes, and I may be
able to upgrade the status if we're not too far into the RCs.

~Andrew

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Oleksii Kurochko]

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On 8/26/25 9:12 PM, Andrew Cooper wrote:
> On 25/08/2025 4:50 pm, Oleksii Kurochko wrote:
>> Hello community,
>>
>> I’d like to remind everyone that the Feature Freeze deadline is approaching,
>> and we still have some outstanding requests from the community for patch series
>> to be merged into 4.21:
>>
>> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
>> 2. Introduce SCI SCMI SMC multi-agent support [2]
>> 3. Introduce eSPI support [3]
>> 4. FRED work: [4], [5], possibly others (?)
> For FRED, That's all that's out on the list.
>
> I've got an update to 4 almost ready to post, this time getting to dev
> complete.
>
> Unfortunately, I've still not managed to get any time on real hardware
> yet, so FRED will still be experimental in my series.  (The timelines
> were originally compatible with Xen 4.21, but access to hardware has not
> been as forthcoming as hoped.)
>
> When I can test on real hardware, there may be bugfixes, and I may be
> able to upgrade the status if we're not too far into the RCs.

Sounds good to me. Let’s wait until you’re able to test it on real hardware.
We’ll have some extra time during the Feature Freeze period, and the RCs
will be moved as well. I’ll announce this a little later today.

~ Oleksii

>
> ~Andrew

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Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Andrew Cooper]

On 25/08/2025 4:50 pm, Oleksii Kurochko wrote:
> Hello community,
>
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
>
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.

There's still a pile of CI bugfixes (de-root the ARM containers, fix
tools-tests) and improvements (Debian Trixie, Alpine), as well as bugs
that need fixing which aren't complete yet (fixes for the de-rooted x86
containers, see if we can do something about the KBL console problem).

Adding Trixie, and moving off an obsolete version of Alpine are critical
for the release, but I need to get FRED more done before I can come back
to this.

~Andrew

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Jan Beulich]

On 25.08.2025 17:50, Oleksii Kurochko wrote:
> Hello community,
> 
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
> 
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.

"symbols: assorted adjustments" plus the later "symbols: discard stray file
symbols", provided someone would take the time to actually look at the patches?

Jan

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Andrew Cooper]

On 25/08/2025 4:50 pm, Oleksii Kurochko wrote:
> Hello community,
>
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
>
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.

Fixes for Intel Fam18/19.  These are partly done, with some work
remaining.  These are more of a bugfix than a feature anyway, and needed
in order for Xen to function on CPUs being released this year (i.e.
fairly critical for 4.21.)

Cleanup/etc for new toolchains.  There's been a lot of work done
already, with a few already-posted patches needing a refresh.

Both of these areas are low risk changes and have been going on (at a
background priority) for most of 4.21.  They should be safe into the
first few RCs.

~Andrew

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Anthony PERARD]

On Mon, Aug 25, 2025 at 05:50:02PM +0200, Oleksii Kurochko wrote:
> Hello community,
> 
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
> 
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.

Do we want to add this following one to the list?
- Allow to build libxl and other tools with json-c instead of yajl
https://lore.kernel.org/xen-devel/20250808145602.41716-1-anthony@xenproject.org/

Cheers,

-- 
Anthony PERARD

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Andrew Cooper]

On 27/08/2025 3:46 pm, Anthony PERARD wrote:
> On Mon, Aug 25, 2025 at 05:50:02PM +0200, Oleksii Kurochko wrote:
>> Hello community,
>>
>> I’d like to remind everyone that the Feature Freeze deadline is approaching,
>> and we still have some outstanding requests from the community for patch series
>> to be merged into 4.21:
>>
>> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
>> 2. Introduce SCI SCMI SMC multi-agent support [2]
>> 3. Introduce eSPI support [3]
>> 4. FRED work: [4], [5], possibly others (?)
>> 5. Introduce CONFIG_DOMCTL [6]
>> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
>> 7. Some other patch series I missed.
> Do we want to add this following one to the list?
> - Allow to build libxl and other tools with json-c instead of yajl
> https://lore.kernel.org/xen-devel/20250808145602.41716-1-anthony@xenproject.org/

Yes.  That was requested by downstreams, and is also bordering on a bugfix.

~Andrew

Re: [Reminder] Feature Freeze is Fri Aug 29, 2025

[Oleksii Kurochko]

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Hello Community,

Considering the number of requests in this mailing thread,
I think it makes sense to extend the Feature Freeze period
by at least one week, moving the deadline to September 5th.

I will send a separate e-mail with that information.

Thanks, everyone, for your responses.

~ Oleksii

On 8/25/25 5:50 PM, Oleksii Kurochko wrote:
> Hello community,
>
> I’d like to remind everyone that the Feature Freeze deadline is approaching,
> and we still have some outstanding requests from the community for patch series
> to be merged into 4.21:
>
> 1. Enable guest suspend/resume support on ARM via vPSCI [1]
> 2. Introduce SCI SCMI SMC multi-agent support [2]
> 3. Introduce eSPI support [3]
> 4. FRED work: [4], [5], possibly others (?)
> 5. Introduce CONFIG_DOMCTL [6]
> 6. xen/x86: move domctl.o out of PV_SHIM_EXCLUSIVE [7]
> 7. Some other patch series I missed.
>
> It looks like some of these patch series still require additional work,
> and I’m not sure there is enough time left before the end of this week.
>
> Could I kindly ask for an estimation of whether these tasks can be completed in time?
>
> [1]https://lore.kernel.org/xen-devel/87jz2vaq9h.fsf@epam.com/
> [2]https://lore.kernel.org/xen-devel/cover.1753184487.git.oleksii_moisieiev@epam.com/
> [3]https://lore.kernel.org/xen-devel/7e6477a83ab65220ef1c5dd22f4ef3536fbbdd5c.1754568795.git.leonid_komarianskyi@epam.com/
>
> [4]https://lore.kernel.org/xen-devel/20250808202314.1045968-1-andrew.cooper3@citrix.com/
> [5]https://lore.kernel.org/xen-devel/20250815204117.3312742-1-andrew.cooper3@citrix.com/
>
> [6]https://lore.kernel.org/xen-devel/20250803094738.3625269-6-Penny.Zheng@amd.com/
> [7]https://lore.kernel.org/xen-devel/20250815102728.1340505-1-Penny.Zheng@amd.com/
>
> Thanks in advance.
>
> Best regards,
>    Oleksii

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