Development [Kernel][09.07.2022][Android 12.1.0]Kirisakura 3.0.17 for Pixel 6/Pro aka "RAVIOLE"

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mrViZhy

Member
Jul 6, 2017
17
3
Hello,
"- supports direct usb access for hi-res playback over USB-C DACs"

1. Does it possible to unlock HDMI Alt mode?
2. As i understand - miracast support depends on ROM (not kernel)?

As i know this features are locked by Google to push users to use Chromecast.

UPD: HDMI Alt mode and miracast support will be a strong reason to root my Pixel 6.
 
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swieder711

Senior Member
My employer recently made us switch to Microsoft authenticated apps on our mobile devices. After hiding Magisk stable 24300 and denying all the Microsoft apps, I was able to run programs like Outlook and Team without root being detected. I had the initial 2.4 kernel running too.

Today, those app started to detect root and would not run. I dont know what changed to cause root to get detected.

I upgraded to Magisk Canary 24313 and can hide root from those apps again. Unfortunately, I when I tried to flash original Kiri 2.4, the Google logo just appeared and then went out.

Are there any workarounds to get this kernel running with Magisk Canary 24313? Is there a test version of the kernel that might work with Magisk Canary?

thanks,
 

Freak07

Recognized Developer / Recognized Contributor
Jan 2, 2011
5,643
18,730
My employer recently made us switch to Microsoft authenticated apps on our mobile devices. After hiding Magisk stable 24300 and denying all the Microsoft apps, I was able to run programs like Outlook and Team without root being detected. I had the initial 2.4 kernel running too.

Today, those app started to detect root and would not run. I dont know what changed to cause root to get detected.

I upgraded to Magisk Canary 24313 and can hide root from those apps again. Unfortunately, I when I tried to flash original Kiri 2.4, the Google logo just appeared and then went out.

Are there any workarounds to get this kernel running with Magisk Canary 24313? Is there a test version of the kernel that might work with Magisk Canary?

thanks,
Try magisk stable with the kernel zip attached to this post:

If you disabled verity/verification vbmeta flags you will have no trouble using magisk canary. If your vbmeta flags are enabled canary will not work as far as I'm aware.
 

swieder711

Senior Member
Try magisk stable with the kernel zip attached to this post:

If you disabled verity/verification vbmeta flags you will have no trouble using magisk canary. If your vbmeta flags are enabled canary will not work as far as I'm aware.
If I use Magisk stable then root gets detected by the Microsoft apps.

I have Magisk Canary currently installed and have it hid and deny list is enabled. I need to research how to determine the state of the verity/verification vbmeta flags.

Are you saying that if these flags are disable then I can use Kiri 2.4 with Magisk canary?
 

Freak07

Recognized Developer / Recognized Contributor
Jan 2, 2011
5,643
18,730
If I use Magisk stable then root gets detected by the Microsoft apps.

I have Magisk Canary currently installed and have it hid and deny list is enabled. I need to research how to determine the state of the verity/verification vbmeta flags.

Are you saying that if these flags are disable then I can use Kiri 2.4 with Magisk canary?
If you didn't disable the flags while updating each month, they are enabled.
Disabling them requires a full wipe.

Yes, canary with this kernel works fine if the flags are disabled.
Magisk changed the way verity is handled during the canaries and that's why things will change. It has nothing to do with the kernel itself.
 
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swieder711

Senior Member
If you didn't disable the flags while updating each month, they are enabled.
Disabling them requires a full wipe.

Yes, canary with this kernel works fine if the flags are disabled.
Magisk changed the way verity is handled during the canaries and that's why things will change. It has nothing to do with the kernel itself.
Thanks for the clarification. I am running Magisk Canary and can hide root from my corporate overlords. I didnt use an vbmeta flag options when I flashed the Magisk Canary via fastboot.

I am going to hold off on doing a full wipe. I did a flash-nowipe earlier today to bring my phone back to life after it got borked.

Sad to now be running a stock kernel!
 
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capntrips

Senior Member
Aug 29, 2020
216
412
OnePlus 6T
Google Pixel 6
I upgraded to Magisk Canary 24313 and can hide root from those apps again. Unfortunately, I when I tried to flash original Kiri 2.4, the Google logo just appeared and then went out.

If you disabled verity/verification vbmeta flags you will have no trouble using magisk canary. If your vbmeta flags are enabled canary will not work as far as I'm aware.

The issue is Magisk no longer strips the avb key from fstab entries, so if you don't have verity disabled, when the system tries to mount vendor_dlkm, it looks for the hashtree described in vbmeta, but it doesn't exist, and even if it did, it would no longer match the the descriptor.

I posted a workaround on the issue in the Magisk repo, but it currently isn't trivial to apply. Unless there's some way to modify the fstab entries from within the kernel, it seems we'll be forced to either disable verity or patch vendor_dlkm (though I suppose it could be shipped with the hashtree already appended) and vbmeta.

The upside is patching the hashtree descriptor in vbmeta does not require you to wipe your data.
 

Freak07

Recognized Developer / Recognized Contributor
Jan 2, 2011
5,643
18,730
Thanks for the clarification. I am running Magisk Canary and can hide root from my corporate overlords. I didnt use an vbmeta flag options when I flashed the Magisk Canary via fastboot.

I am going to hold off on doing a full wipe. I did a flash-nowipe earlier today to bring my phone back to life after it got borked.

Sad to now be running a stock kernel!
You don't disable the vbmeta flags when flashing a boot.img, but when updating your phone via the factory images for example. Or just issue the command via fastboot for the current firmware you're on.

If you plan to disable the flags in the future, you have to repeat the command to disable them each time you flash a firmware package (full OTA zip or factory image) that contains a vbmeta image before you boot into the phone with the updated firmware.

I kept my flags disabled (which allows me to basically flash any source compiled image to my phone without tripping verity and relying on magisk for this in any way) since the beginning (magisk did not support this in the first few days of the pixel) and that's why I have no problem now.
 

swieder711

Senior Member
The issue is Magisk no longer strips the avb key from fstab entries, so if you don't have verity disabled, when the system tries to mount vendor_dlkm, it looks for the hashtree described in vbmeta, but it doesn't exist, and even if it did, it would no longer match the the descriptor.

I posted a workaround on the issue in the Magisk repo, but it currently isn't trivial to apply. Unless there's some way to modify the fstab entries from within the kernel, it seems we'll be forced to either disable verity or patch vendor_dlkm (though I suppose it could be shipped with the hashtree already appended) and vbmeta.

The upside is patching the hashtree descriptor in vbmeta does not require you to wipe your data.

Can I use your modified vendor_dlkm and vbmeta images for the May update to flash them to my Pixel 6 Pro?

If I understand thing correctly, this would like me Flash Kiri 2.4 without wiping my phone.
 

capntrips

Senior Member
Aug 29, 2020
216
412
OnePlus 6T
Google Pixel 6
Can I use your modified vendor_dlkm and vbmeta images for the May update to flash them to my Pixel 6 Pro?

If I understand thing correctly, this would like me Flash Kiri 2.4 without wiping my phone.
I'm on Pixel 6 (oriole, not Pro), so mine will be different from yours. I'll try to package up my workaround in the next few days to make it a bit easier to apply, assuming I can generate the hashtree on-device.
 

capntrips

Senior Member
Aug 29, 2020
216
412
OnePlus 6T
Google Pixel 6
I ported the relevant segments of avbtool and distilled the modifications to vbmeta to the bare minimum. It does not patch the authentication block or sign the image. Generating FEC codes is optional. You can find the build in the git repo:


Use vbmeta from stock and vendor_dlkm from the kernel. Both will be patched in place.

Note: This is only useful if you don't have verity disabled.

For FEC support, you can find prebuilt versions of the fec binary here. It's optional, but long term, it's probably advisable.

Here are the sha256sums for SP2A.220505.002 and Kirisakura 2.4.0, both for oriole, from the alpha02 build:

Code:
b47cf7b49c4b38374bf45ee3fb6e8fe6531ec42d9a5caf4ce7e63929a7cbc5b5  vendor_dlkm.img
2139e200534f75f2d159aeea6b74e3526a7008a57235a7d934c1bffcf74eb0c9  vbmeta.img
 
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capntrips

Senior Member
Aug 29, 2020
216
412
OnePlus 6T
Google Pixel 6
Do I run hashtreepatcher directly on my Pixel 6 Pro or some other way?
Code:
adb push hashtreepatcher /data/local/tmp
adb push fec /data/local/tmp
adb push vendor_dlkm.img /data/local/tmp
adb push vbmeta.img /data/local/tmp
adb shell
cd /data/local/tmp
chmod +x hashtreepatcher
chmod +x fec
./hashtreepatcher vendor_dlkm.img vbmeta.img
exit
adb pull /data/local/tmp/vendor_dlkm.img vendor_dlkm-patched.img
adb pull /data/local/tmp/vbmeta.img vbmeta-patched.img
 
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swieder711

Senior Member
Code:
adb push hashtreepatcher /data/local/tmp
adb push fec /data/local/tmp # optional
adb push vendor_dlkm.img /data/local/tmp
adb push vbmeta.img /data/local/tmp
adb shell
cd /data/local/tmp
chmod +x hashtreepatcher
./hashtreepatcher vendor_dlkm.img vbmeta.img
exit
adb pull /data/local/tmp/vendor_dlkm.img vendor_dlkm-patched.img
adb pull /data/local/tmp/vbmeta.img vbmeta-patched.img
This is super helpful.

Edit1: Once I pull the modified files then do I flash them via Fastboot?
fastboot flash vbmeta vbmeta-patched.img
fastboot flash vendor_dlkm vendor_dlkm-patched.img

Edit2: Just confirming that line 2 is this for Pixel 6P
adb push fec-arm64 /data/local/tmp
Do I need to rename fec-arm64 to fec?

Edit3: Here are the results from running hashtreepatcher
$ ./hashtreepatcher2 vendor_dlkm.img vbmeta.img
- Patching complete
Hashtree descriptor:
Image Size: 44224512 bytes
Tree Offset: 44224512
Tree Size: 352256 bytes
Data Block Size: 4096 bytes
Hash Block Size: 4096 bytes
FEC num roots: 0
FEC offset: 0
FEC size: 0 bytes
Hash Algorithm: sha256
Partition Name: vendor_dlkm
Salt: dcfdb868e3aef90f102187d66b9cd2c71589a8b0f0035387940a2ca364d8cd05
Root Digest: 6dd4ee4ec76f02c778d56c5d43a08cdb8fb20f8db3b0ee3d04bf1728c6627b06
Flags: 0

Thanks for holding my hand through this. I am ready to flash the patched files and then try to Flash Kiri 2.4 kernel. Should the phone be in fastboot or fastbootd mode?
 
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noidea24

Senior Member
i followed al
Code:
adb push hashtreepatcher /data/local/tmp
adb push fec /data/local/tmp # optional
adb push vendor_dlkm.img /data/local/tmp
adb push vbmeta.img /data/local/tmp
adb shell
cd /data/local/tmp
chmod +x hashtreepatcher
./hashtreepatcher vendor_dlkm.img vbmeta.img
exit
adb pull /data/local/tmp/vendor_dlkm.img vendor_dlkm-patched.img
adb pull /data/local/tmp/vbmeta.img vbmeta-patched.img
been trying to get this thing to boot for three days, i finally got the device to boot with these instructions but without touchscreen response :(.

all these commands completed successfully.
flashed the pulled patched images in fastbootd.
reboot to bootloader and flashed the kernel.

IT ACTUALLY BOOTED. this is the first time ive been able to boot.
went to unlock the phone, touchscreen is unresponsive. phone isnt frozen, it just doesnt respond to touch.
 

capntrips

Senior Member
Aug 29, 2020
216
412
OnePlus 6T
Google Pixel 6
Once I pull the modified files then do I flash them via Fastboot?
Code:
fastboot flash vbmeta vbmeta-patched.img
fastboot flash vendor_dlkm vendor_dlkm-patched.img

Yes, though you will need to reboot into fastbootd for vendor_dlkm:

Code:
fastboot reboot fastboot

Just confirming that line 2 is this for Pixel 6P
Code:
adb push fec-arm64 /data/local/tmp
Do I need to rename fec-arm64 to fec?

Yes, the file must be called fec and it must be in your working directory when you call hashtreepatcher. You can tell if it worked if the output doesn't have all zeroes for the FEC fields.

Note: If you patch vendor_dlkm a second time, be sure to push a fresh copy, as hashtreepatcher will happy keep appending more and more hashtree footers to the file. I have no idea if that affects anything, but it will at least keep getting needlessly larger.

Should the phone be in fastboot or fastbootd mode?

fastbootd only for vendor_dlkm.

been trying to get this thing to boot for three days, i finally got the device to boot with these instructions but without touchscreen response :(.

went to unlock the phone, touchscreen is unresponsive. phone isnt frozen, it just doesnt respond to touch.

Sounds like your vendor_dlkm didn't flash properly. Be sure to install it from fastbootd (which I see you did), or just update the zip with the patched one and let some kernel manager flash it.

What version of Magisk are you using? Do you have verity disabled?
 
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noidea24

Senior Member
Sorry about the post, chromium acting funny.

My problem might be that I didn't have fec in the Tmp directory when running hashtreepatcher.

But as soon as the fec file is present, hashtreepatcher fails out and I get a "unable to open vendor_dlkm.img"

I thought it was a bad download or I had the wrong fec, so I tried the standard (non64) and it's the same error.
 
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  • 30
    Update to 3.0.17

    Hey guys and girls,

    I hope everyone started into a good weekend. Here´s the next release.

    There are again a lot of changes in this release.

    Android 13 Beta included a lot of little changes fixes and improvements as well as scheduler patches aiming to improve task placement.
    Some of these changes tie together with the powerhal. Which means based on certain scenarious, device idle, interaction etc several switches get flipped.
    To summarize a few of those changes: Disable NPI (non prefer idle) packing during app launches and camera launches for better task placement during those operation, when no interaction is happening disable prefer idle for foreground tasks to reduce power consumption, adjust uclamp values in regards to performance on the new scheduler changes, add adaptive battery power hints from A13 beta.
    Updated energy model, for improved efficiency.
    UFS performance is improved as well.

    The default BFQ IO-Scheduler is switched to Samsungs SSG IO-Scheduler(taken from Galaxy S22 source), which comes far more lightweight than BFQ (7500 lines of code vs 1000). This change was tested over the last few weeks with no regressions. This reduces overhead and thereby consumed CPU cycles. It´s also more tailored towards android instead of the "generic" BFQ from linux-kernel. As usual this might or might not translate to any "real-world" difference in battery life depending on various factors.

    Latest changes from f2fs-stable are included, which include several bugfixes and small improvements.
    Binder improvments/fixes from kernel/common, performance for exfat formatted storage device improved (niche use case, but still nice), trusty high prio workqueue improved.

    For other changes and details please take a look at github.


    I wish everyone a nice day.

    If you´re one of the unfortunate ones that suffer from the device is corrupt bug on pixel 6 series please take a look at the FAQ at the beginning of this thread it contains a solution. The issue is probably caused by a bug that affects pixel 6 devices and has nothing to do with magisk or a kernel, it just happens to get triggered when using any of those.



    Changelog:


    - Merge all the latest source updates from Android T-Beta
    - SSG IO scheduler for reduced overhead and less CPU cycles (more lightweight and android optimized)
    - scheduler improvements
    - task placement improvements​
    - use new energy model from A13​
    - improved UFS performance​
    - Linux-stable merged to 5.10.129
    - Use prebuilt Google Clang 14.0.7 for compilation
    - bump f2fs-stable to latest available
    - binder improvements from kernel/common
    - improve exfat performance (if someones uses exfat formatted devices)
    - improve trusty high prio WQ (fingerprint unlock)
    - loads of other changes from kernel/common
    - update powerhal
    - disable npi packing during app launches and camera launches​
    - disable foreground prefer idle during device idle situation to save power​
    - add adaptive battery hints from a13 beta​
    - adjust uclamp boosts during interaction to account for scheduler changes
    - loads of other changes, please check github



    Download:


    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.



    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07
    11
    @Freak07 Any love for an A13 kernel, especially if Beta 4 hits tonight? 😉
    Would also like to know. Planning the switch to android 13 and would like to flash this wonderful kernel.
    No, I have no plans to support A13 beta. It will be supported once it´s stable. I don´t have the time, desire and motivation to support it.
    It all boils down to the fact that I enjoy doing what I´m doing here, I do it in my free time and share what I´m using myself with others so they can enjoy it with me.

    Since that questions comes up from time to time:

    There are various reasons for this below in hide tags:
    I´m not really comfortable releasing something I´m not running/testing extensively myself with loads of changes compared to the stock base. QPR Beta was a bit different as the kernels were interchangable except for a small touchscreen driver update. That way I could test the same kernel on stable A12 and knew it was stable. At least while not running the beta firmware. That´s not the case with A13 beta.
    But ultimately I was not comfortable with that as well, that´s why I put the A12 QPR beta kernel out with no support from my side. Different firmware can still behave differently on the same kernel.
    I never felt the urge to do beta testing for companies just to run more recent software too. I heard it´s quite stable for a beta, but I´m happy on A12 :)

    I don´t have time to test, maintain and build that many compilations, let alone switching between A13 beta and A12 stable on my phone for testing. It´s simply not possible, and I don´t want to release something that´s not extensively tested.
    I think sometimes people don´t realize how much time goes into this aspect of my kernels projects alone.

    Also try to see it that way:
    Merging code updates takes time. Be it linux-stable, f2fs-stable, kernel/common, lrng updates, updates directly from Google or a lot of the features that are descrbied in the OP. Sometimes longer, sometimes shorter.
    This kernel is now very very far from the stock base as is also reflected in the OP. So sometimes merging code updates will take time as there are many conflicts that need to be solved on my kernel. Even if the branches are somewhat similar I still need a lot of additional time to manage this aspect alone, not to speak of testing on my device to make sure nothing is broken.

    There´s no longer just the kernel repo itself to manage. With the introduction of GKI, the kernel is split in several sub repos for different device specific drivers, touchscreen, wifi, uwb, nfc, bt, etc etc. Those needs to be managed too, as well as other repos from the build environment.
    Powerhal changes need to be monitored and adjusted each month too, as they´re different between a12 and a13.

    Building takes time. Every compilation, for testing or release purposes takes about 15 minutes. Only building, not adjusting the code. Every release here needs 2 different builds for oriole/raven. Yes I can do something else during the compilation, but it´s still time I need.

    I updated to the July build with Kirasakura 3.0.17 and can confirm TTL spoofing is working again. I am able to execute the EKXM script without error and my carrier doesnt tag my tethering traffic. Thank you for your continued dedication to this awesome kernel.
    Thanks for reporting back! Enjoy the ride! :)

    I have a Pixel 6 pro. Decided to root and install this kernel after the release of 3.0.17. 1. I tried using KernelFlasher Alpha 06 and it resulted in a bootloop. I successfully recovered and used FKM to flash and everything worked fine.

    Notes on performance: In general, I believe this kernel provides a more responsive interface and lower battery use during idle, but I don't have any testing to prove it. I will note that, perhaps because I enabled DNS over HTTPS in magisk, that the initial setup / install of apps seems to take a lot more time than I'm used to - specifically the initial log in/authentication. Twitch, for example, took about a minuteto go from the purple screen with logo to the initial login. Subsequent launches after initial setup for everything works as quickly (possibly faster) than expected. Does anyone else experience the same? Is it because I'm using secure DNS in magisk?

    Thanks again for all your work. I've lurked on this forum for months, and your work helped me chose to buy this phone over a Samsung S22 ultra. I hope my only issues encountered so far help with further development. Let me know if there is any way to produce logs to document these slow initial launches / authentications.
    Yeah that sounds like this is your issue. I´m fairly certain the phenomenon you´re describing isn´t caused by the kernel as I´d have been affected too and I sign in to different apps from time to time too. :)
    Especially XDA app, since that apps kicks me out every few days and I need to sign in again and again and again.

    Thanks for the feedback. I don´t know why kernelflasher didn´t work the first time for you though. I´m using it to flash every single kernel I´m testing and release here.
    After flashing via kernelflasher is completed there´s an option to save a log. If you have time and motivation again to try and reproduce the issue, maybe grab a log and post it in the kernelflasher thread from @capntrips so that can be investigated.
    6
    Question.. is there a setting/magisk module which allows to configure the % at which charging stops? I don't like charging past 75%, but yesterday I just passed out and woke up with the phone plugged in 😬 😅
    ACC with the AccA GUI front end. I charge to only 75% too - I also don't usually let the battery go below 25%, and I very rarely fast charge.

    I also use an app (might be GSam Battery Monitor) to alert me when the phone reaches 75%, although I could just as easily set up an Automate script to email me when that happens instead if I wanted.

    Don't drink and charge! ;)
    6
    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.

    Ok fine I will! Great work as always my friend. Nice to be in the P6 crowd now since my P4XL bit the dust last week. 👍👍😉
    5
    Kernel cannot flashed via TWRP? Why are trying to flash if through Apps?
    There is no TWRP for the Pixel 6 series.
  • 100
    Kirisakura-Kernel for the Pixel 6/Pro

    Hello everyone,

    To keep it short: Here is Kirisakura - Kernel for the Google Pixel 6 Pro aka Raven and the Pixel 6 aka Oriole, together Raviole.
    I would appreciate if everybody that flashes the kernel, reads at least once through this opening post and the following ones.

    The kernel aims to keep most of the subsystems updated, way ahead of the stock kernel, thereby improving security, stability and performance!
    This includes Linux-Stable, F2FS-Stable and kernel/common!
    If that got you curious, have a read about linux-stable and why it is important here. The stable-process is not the same for every subsystem, but the general idea, rule of thumb and benefits are applicable for other subsystems as well.

    The kernel includes a lot of improvements and contributions from other developers as well. Without this kernel would not exist.
    A big part of improvements originate from @arter97´s, @kdrag0n´s and @Sultanxda´s work. Many others contributed in some way or another to this kernel.
    A big thanks to all of them at this place!

    Now lets continue with a list of features in the next paragraph!

    Features:
    Main Features:
    - Based on latest A13 kernel sources from Google, Kernel is made for Android 12
    - Linux-Stable-Upstream included to 5.10.129
    - Compiled with prebuilt Google clang 14.0.7
    - merged kernel/common (improvements to android-common-kernel straight from google)
    - Multi-gen LRU backported (more info here, here as well and here) to improve mm and reduce cpu cycles
    - Utilize an additional kswapd thread to increase throughput for memory reclaim
    - pelt multiplier tied into powerhal to speed up scheduler during interaction (more info here)
    - prevent frequency spikes caused by small transient tasks when the device is idle(more info here)
    - tie mechanism to prevent frequency spikes caused by small tasks also into powerhal
    - scheduler improvements for RT (realtime) tasks
    - introduce and setup PMU limiter (prevents CPU from spiking to max when it isn´t needed, based on PMU reads, more information here)
    - improve camera performance by tuning the powerhal during recording
    - bias tasks of rt, sf and ta groups to prefer high capacity cpus during app launches, interactions
    - improve app launches via powerhal
    - improve trusty driver performance which connects to fingerprintscanner-hal by using high perf wq during fp unlock
    - restrict maximum CPU-Freqs during screen off/ idle to 1.1GHZ for all clusters to save power
    - introduce unfair f2fs rwsems to prevent writer starvation and improve IO perf under heavy load
    - fuse: give wakeup hints to scheduler to speed up compress/decompress in internal storage (details)
    - enable RCU_BOOST (details here), also fix RCU_BOOST behaviour
    - F2FS-Stable updated
    - TCP backports from mainline
    - SSG IO scheduler for reduced overhead and less CPU cycles (more lightweight and android optimized)
    - Scheduler updates from linux-main
    - use improved energy model for exynos cpu cooling/thermal control
    - allow GPU to scale down to 150mhz, but boost to higher value in case of interaction via powerhal
    - affine IRQS to CPU 7 during camera usage for improved performance as it tends to overload the little cores
    - use bbr as default TCP congestion algorithm (fasted algo according to this excellent research from @kdrag0n found here )
    - Enable support for TTL spoofing
    - Include LRNG, see here and here for more info, bump to v45 with 3.0.0
    - important patches from kernel/common for 5.10 (here are more details)
    - CleanSlate Features from @tbalden, big applause here! (s2s, notification booster, battery saver, flashlight notifications. Please note: cleanslate features that work otherwise with rooted devices like kadaway (adblocking) are not implemented on this kernel since I´m running rooted)
    - dirty pipe exploit fixed
    - supports direct usb access for hi-res playback over USB-C DACs
    - flashing the kernel will preserve root

    Various Optimizations:
    - update several drivers to use power efficient workingqueues (for example wlan driver)
    - kernfs: use buffer from the stack space
    - printk: use buffer from the stack space
    - kthread: use buffer from the stack space
    - bpf: avoid dynamic memory allocation for small value buffers
    - binder: Reserve caches for small, high-frequency memory allocations
    - kernfs: use kmem_cache pool for struct kernfs_open_node/file
    - cgroup: use kmem_cache pool for struct cgrp_cset_link
    - f2fs: reduce timeout for uncongestion
    - f2fs: Demote GC thread to idle scheduler class
    - f2fs: set ioprio of GC kthread to idle
    - mm: vmstat: use power efficient workingqueues
    Wakelock Blocker:
    - advanced wakelock blocker with the ability to block any wakelocks (dangerous, use with caution)
    - please read [URL="https://arstechnica.com/gadgets/2018/08/p-is-for-power-how-google-tests-tracks-and-improves-android-battery-life/"]this for further info

    AK3 Helper Module:
    - restrict little cluster to 1,19ghz mid cluster to 1,19ghz and big cluster to 1,1ghz during screen off, to reduce battery usage for example during music playback
    - only use little cores during screen off/device suspend
    - tie pelt multiplier into the powerhal (more info here)
    - prevent frequency spikes caused by small transient tasks during idle operation (more info here)
    - boost scheduler using the pelt multiplier during fingerprint unlock operation
    - setup and control PMU limiter via powerhal (more info here)

    DOWNLOAD:
    Download is always located in this folder:

    Changelog:
    Android 12.0.0

    1.0.0 Initial Release
    1.0.2 https://forum.xda-developers.com/t/...r-pixel-6-pro-aka-raven.4358435/post-85910621
    1.0.5 https://forum.xda-developers.com/t/...r-pixel-6-pro-aka-raven.4358435/post-85924419
    1.3.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-85976139
    1.4.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86109665
    1.5.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86259863
    1.7.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86390563
    1.8.4 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86541727

    Android 12.1.0 Stable (March feature drop and more recent)
    2.0.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86617873
    2.0.1 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86637233
    2.1.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86695911
    2.3.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86821331
    2.4.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86834981

    Android 12.1.0 Stable (June feature drop and more recent)
    3.0.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86992705
    3.0.1 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86996237
    3.0.17 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-87127695



    Android 12L QPR Beta - Deprecated

    Requirements

    - unlocked Bootloader
    - USB-Debugging in developer options enabled
    - latest adb and fastboot binaries
    - working adb and fastboot environment so you can flash back to stock in case something goes wrong
    - working magisk environment (a device rooted with latest magisk stable in case you want to be absolutely safe)


    How to flash the Kernel:
    1a. Make sure you tick all the requirements above
    1. Download the correct kernel.zip depending on your device (Pixel 6 = oriole || Pixel 6 Pro = raven)
    2. Flash the correct kernel.zip via EXKM, FKM or kernel flasher. Root will be preserved. The AK3 magisk helper module will be automatically installed during flashing the kernel.zip and be present on next reboot.
    Do not remove or disable the AK3 Magisk Helper Module otherwise the device will bootloop.
    3. Reboot and profit.


    Manual installation is no longer supported starting with release 3.0.0, as there´s a free open-source option to flash kernel.zips now.
    Instead use the free kernel flasher, which can be found here.

    Manual installation without relying on paid apps like fkm/exkm:
    Please have a look at the linked post.



    Donations:
    Donations are not mandatory but very welcome if you want to support development or just buy me a coffee/tea/beer :)
    If you like my work: http://paypal.me/freak07

    Credits:
    @osm0sis for all his work on AK3.
    @tbalden for being the best HTC, Pixel, OnePlus and Asus wingman!
    @capntrips for all his work on the pixel 6!
    @LeeDroid and @mwilky for their awesome roms and work I used on multiple devices!
    @Captain_Throwback for all the mentoring and guidance!
    @Eliminater74 for bringing me into the game and the Inspiration
    @nathanchance for his upstream guidance and assistance
    @RenderBroken for helping me out
    @flar2 for all his work
    @joshuous for all the help he provided to me in the past!
    @arter97 for giving me advice
    @kdrag0n for his help and advices!
    @topjohnwu for magisk and his entire work!


    Source Code: https://github.com/freak07/Kirisakura_Raviole
    37
    Update to 1.8.4

    Hey guys and girls,


    So here´s the next update. It´s kind of an off schedule update, as I planned to update the kernel with the next security update/feature drop.

    But in the light of recent events regarding the new exploit called "Dirty Pipe" (more info here), which is similar to the "Dirty Cow" exploit from a while ago, but easier to exploit this time, I decided to release an update ahead of schedule.

    This exploit was fixed in linux-stable 5.10.102, as opposed to a single commit in AKC (android kernel common, commit here). This shows once more why merging linux-stable is beneficial as explained in detail in the OP.

    Since one of the key aspects of this kernel is security and staying on par with upstream (which often fixes exploits way ahead of android security bulletin updates, even before an exploit is even known or fixed via a patch on the security bulletin) I decided to release this update as quickly as possible, so this exploit is fixed on devices running this kernel.

    Several other notable improvements and changes in this release:
    Bring in scheduler updates from Android 13 Developer Preview, which aim at improving task placement. (adjust powerhal accordingly)
    BFQ IO-Sched is now on par with linux-mainline.
    Several fixes to mm subsystem, f2fs and others.

    Several other improvements are included as well. More details in the changelog.
    Download is below.
    Updated instructions in the OP!


    Changelog:
    - linux-stable 5.10.103
    - contains fix for the dirty pipe exploit
    - built with clang 14.0.2 prebuilt by google
    - improvments from kernel/common
    - fix memory leaks
    - security related patches
    - mm improvments
    - f2fs fixes
    - scheduler fixes
    - for details please check github
    - built with improvements from A13 Dev Preview to display driver
    - other changes please look at my github


    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues.
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.
    37
    Update to 1.7.0

    Hey guys and girls,


    So here´s the next update. It includes the february security update. Most of the changes brought by the February kernel source drop, were already included in this kernel by merging kernel/common and linux-stable.


    Several other notable improvements and changes in this release:
    Improve f2fs performance by merging a patchset to prevent writer starvation for the checkpoint thread. This was discussed this month in the f2fs mailing list and is already merged to the kernel/common tree. It´ll improve performance under heavy I/O utilization.
    You can find more information following the discussion here.
    Necessary backports were brought to the kernel and the platform specific f2fs-implementation was also adjusted.
    Latest f2fs-stable was also merged to the kernel.

    Update the patchset to prevent frequency spikes caused by small tasks as well. Tie those new changes into the powerhal. (That means users not flashing the kernel.zip, but instead use the manual installation method, which are only a handful from the download count, need to flash the updated magisk helper module. Users that flash the kernel.zip via FKM/EXKM have to just flash and forget)

    Several other improvements are included as well. More details in the changelog.
    Download is below.
    Updated instructions in the OP!


    Changelog:
    - February Security update merged
    - linux-stable 5.10.96
    - include latest f2fs-stable
    - improvments from kernel/common
    - fix memory leaks
    - security related patches
    - mm improvments
    - for details please check github
    - introduce unfair f2fs rwsems to prevent writer starvation and improve IO perf
    - update patchset to prevent freq spikes caused by small transient tasks (also tie this into powerhal)
    - give pelt multiplier power hint for scheduler performance boost during fingerprint unlock
    - fuse: give wakeup hints to scheduler to speed up compress/decompress in internal storage (details)
    - enable RCU_BOOST (details here), also fix RCU_BOOST behaviour
    - update LRNG implementation (thanks to arter97 )
    - improvements/fixes for CleanSlate features
    - other changes please look at my github


    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues.
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.
    36
    Update to 2.1.0

    Hey guys and girls,


    Alright here´s the next update. And it´s again a really big update! :)
    A few weeks ago google pushed a backport of Multi-Gen LRU for the 5.15 kernel to their aosp/kernel common branches. I went ahead and backported that to our 5.10 tree alongside other mm-improvements from linux-mainline. By now google pushed their own backport for 5.10, but I decided to go with my original implementation as it contains a lot more improvements alongside the main Multi-Gen LRU backport and ran stable for well over 3 weeks.

    Powerhal was adjusted quite significantly too. CPU-freqs are restricted to 1.1GHZ max during screen off/device idle operations to save more power. App launches and camera operation are improved as well in the powerhal. General usage benefits from those changes too.

    Latest linux-stable, f2fs-stable and kernel/common were merged as well.

    Users that decide to not use the CleanSlate features and don´t install the apps won´t see the kernel parsing for the config files extensively.
    Vibration Booster from CleanSlate was improved as well to kind of counter the weaker haptic feedback since the March update. Please check the linked thread from the changelog. Huge thanks to @tbalden for this. If you want to give a little bit back consider purchasing the apps via playstore or maybe a small donation. :)



    I´ll keep the warning as to preferably using magisk stable to avoid potential issues as well here in this post.
    Please note that 24305 works fine for me though on non beta, stable April firmware!
    Important:
    Make sure you´re being rooted with magisk 24300 stable before flashing the kernel if you´re unsure. Any magisk version above 24303 might potentially lead to a reboot back to bootloader since android 12.1.0 and A12L QPR3 Beta. At the moment this only affects canary, but I put the warning just in case this will not get resolved in upstream magisk in time until the next stable drops. I saw a post that some modules also have problems with latest canary, so there´s a lot going on at magisk´s side at the moment.
    A post containing a short write-up how to "downgrade" magisk can be found following this link.



    Changelog:

    - Update for April Source
    - Linux-stable merged to 5.10.109
    - f2fs-stable merged
    - fixes and improvements from kernel/common including several subsystems
    - multi-gen LRU ( more info here, here as well and here)
    - general LRU improvements from Linux-Mainline
    - improve camera performance by tuning the powerhal during recording
    - improve app launches via powerhal
    - restrict maximum CPU-Freqs during screen off/ idle to 1.1GHZ for all clusters to save power
    - remove cleanslate config files getting parsed excessively even if user did not install the CleanSlate apps
    - improve vibration boosting feature in CleanSlate config app to allow stronger vibration again(please have a look at this post )
    - other fixes for CleanSlate features such as sweep to sleep
    - updated anykernel 3 zip, thanks to @osm0sis
    - probably a lot more I forgot as time is short for me.


    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues and read this post carefully. Don´t use magisk canary 24303 or more recent to avoid potential issues!
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07
    35
    Update to 2.4.0

    Hey guys and girls,


    Alright here´s the next update and it´s fine to flash on May firmware. As I suspected we already had all the changes for May by merging upstream.
    I´ll include the changelog from 2.3.0 as well in this release post, since I think a lot of people flash the kernel on a monthly basis when the security updates drop. So this post pictures the changes going from 2.1.0 to 2.3.0! As I said 2.3.0 was kind of a final rehearsal to make sure everything is good for the May update.
    I´ll put a remark behind changes going from 2.3.0 to 2.4.0.
    This release is made for stable Android 12.1.0 May firmware. Not QPR Beta or A13 Beta!
    Once I find enough time or QPR beta gets updated, I might update the QPR beta release. No plans to support A13 beta.

    I also finished up the tables/graphs in regards to different binnings with the respective voltages on different tensor chips thanks to the dmesgs you all provided. I really want to put out a big thanks here to everyone for taking the time and participating. It was really great to see this kind of response.
    I´ll provide them in a post in this thread soon.
    So with that in mind we´ll get to the next paragraph were I could put those tables to good use.

    A few changes from A13 Beta are merged to the kernel so we can enjoy the improvements on A12 ahead of time. Most of them aim to improve the scheduler and task placement.

    However the recently dropped A13 Beta source contains a commit that can restrict max-cpufreqs based on PMU (Power monitor unit) reading. I setup this mechanism (lets call it "PMU Limiter") to mildly cut back max-freqs when they aren´t needed. It works quite well so far, with no performance impacts during scenarios where max cpufreq is beneficial. (e.g. app launching, camera launching, interaction etcetc)
    That means if a certain threshold is not crossed the max-freqs will be restricted to 1,4GHZ/1,6GHZ/2,4GHZ (for little/mid/big cores). As soon as the PMU detects enough pressure, those limits will be lifted.
    The frequency limits are based on tracing during various scenarios, benchmarking and also factor in the voltage table I was able to create. For example: 2.4GHZ for the big cores is the last freq step where a steady linear increase in voltage can be seen. Freq steps higher than 2,4ghz have a steeper slope.
    Keep in mind CPU-Freqs shouldn´t be touched in EXKM/FKM or other kernel managers. They are controlled by various mechanisms now (thermal hal, powerhal, pmu limiter etc) and values will get overwritten based on input.
    That means if you open the CPU section in a kernel manager, the maxfreqs will not be the actual maxfreqs that are possible. or the minfreqs might be raised. That´s normal and there´s nothing wrong if that´s the case.

    Additionally to the previous changes tasks of rt, sf and ta groups are now biased to start on high capacity CPUs during app launches, interactions etc.
    As usual, depending on your usage you may or may not notice a difference during these scenarios. :)

    While tracing I noticed kswapd often takes 100% cpu share when reclamation is happening. Since we use an 8 core cpu, an additional kswapd thread is being spawned during boot, which increases throughput for kswapd in these scenarios. Reasoning behind this can be found here.

    The trusty driver which connects to the fingerprintreader hal uses now a high prio workqueue when the phone is unlocked via fingerprint scanner. This means better performance, especially under stress. Keep in mind this is a kernel level change, it won´t magically improve fingerprint reader times manifold.

    DAMON and DAMON-Reclaim were removed from 2.3.0 going to 2.4.0. I tested the feature privately and it unfortunately collides with googles EH zram implementation causing the phone to crash at the moment. Tried to debug this issue, but no luck for the May release here.
    If you previously enabled the feature without adjusting the parameters properly and your phone didn´t crash, DAMON-Reclaim just didn´t do anything.

    2.4.0 also has an updated anykernel3.zip, which includes all the latest anykernel3 changes.
    Thanks to @capntrips we now have full support to resize vendor_dlkm partition which is part of the super partition. That means we finally can flash larger than stock vendor_dlkm partitions via anykernel3.zips and resize the partition properly instead of just dd´ing to it.
    A huge thanks to @capntrips for working on this and to @osm0sis for maintaining anykernel3.


    Disclaimer:
    I´ll keep the warning as to preferably using magisk stable to avoid potential issues as well here in this post.
    Please note that 24306 works fine for me though on non beta, stable May firmware!
    Important:
    Make sure you´re being rooted with magisk 24300 stable before flashing the kernel if you´re unsure. Any magisk version above 24303 might potentially lead to a reboot back to bootloader since android 12.1.0 and A12L QPR3 Beta. At the moment this only affects canary, but I put the warning just in case this will not get resolved in upstream magisk in time until the next stable drops. I saw a post that some modules also have problems with latest canary, so there´s a lot going on at magisk´s side at the moment.
    A post containing a short write-up how to "downgrade" magisk can be found following this link.

    If you´re one of the unfortunate ones that suffer from the device is corrupt bug on pixel 6 series please take a look at the FAQ at the beginning of this thread it contains a solution. The issue is probably caused by a bug that affects pixel 6 devices and has nothing to do with magisk or a kernel, it just happens to get triggered when using any of those.



    Changelog:

    - Linux-stable merged to 5.10.113
    - Use prebuilt Google Clang 14.0.5 for compilation
    - Utilize an additional kswapd thread to increase throughput for memory reclaim
    - remove DAMON and DAMON-Reclaim from kernel build (2.4.0)
    - improve trusty driver performance which connects to fingerprintscanner-hal by using high prio wq during fp unlock (2.4.0)
    - mm improvements from kernel/common (2.4.0)
    - improvements from kernel-common a13 to page_pinner
    - mainline backports for BFQ scheduler
    - rework Multi-Gen LRU implementation
    - scheduler improvements for RT (realtime) tasks
    - other scheduler improvements
    - include scheduler improvements from A13 Beta regarding better task placement
    - introduce and setup PMU limiter (prevents CPU from spiking to max when it isn´t needed, based on PMU reads)
    - bias tasks of rt, sf and ta groups to prefer high capacity cpus during app launches, interactions, camera launches, etc
    - updated anykernel3.zip (thanks to @osm0sis) -> adds full support for resizing vendor_dlkm ( huge thanks to @capntrips )



    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues and read this post carefully. Don´t use magisk canary 24303 or more recent to avoid potential issues!
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07