WARNING

This repository includes the intel Linux kernel source code.

Overview

This is the IoTG Linux kernel overlay repository (Ubuntu). It includes the Out-Of-Tree(OOT) IoTG Linux kernel patches, kernel config and other files. With them, user can build the Linux kernel .deb packages.

Content

This repository include the content which are used to build the debian binary packages, below are the detailed information.

├── build.sh  # Script to build the Debian package
├── config.sh # the configurations of the overlay
├── kernel-config  
│   ├── base-os		# Ubuntu kernel config
│   │   └── hirsute.config-5.11.0-16-generic
│   ├── features 	# Intel kernel features configs
│   │   └── features.cfg
│   └── overlay
│       └── overlay.cfg	# Overlay kernel config
├── kernel-patches	# Intel Out-Of-Tree kernel patches.
│   └── patches
│       └── series
└── README.md

Kernel configs

In the kernel overlay, we maintain three-level kernel configurations.

- base-os(ubuntu), 
- features (the .cfg file in kernel-config/features directory)
- kernel-config/overlay/overlay.cfg

When build the debian package by build.sh, the features config overrite the base-os kernel config, and overlay.cfg overwrites both the features and base-os kernel config.

The "overwrite" is operated by ./scripts/kconfig/merge_config.sh.

How to build the iotg linux kernel overlay

To build the debian package, just run the build.sh script, and it will generate the debian package in the current directory.

Depedency

sudo apt-get install kernel-wedge

SUPPORT

IOTG Linux Kernel Team

GPG Signed Releases

i) Check if a release tag is GPG-signed or not

if a tag is not signed, when you run ‘git tag -v ’ command, you get the result as:

$ git tag -v lts-v4.19.272-android_t-230316T041640Z object 7150c8b4efa2baf0bef3a3da3850d29715c6fcbb type commit tag lts-v4.19.272-android_t-230316T041640Z tagger sys_oak sys_oak@intel.com 1679296599 -0700

release Kernel 4.19 for android T Dessert error: no signature found

You can see ‘error: no signature found’ if the tag is not signed

If the tag is signed - please follow the below steps to get the public key and verify the tag -

ii) Download public key

Open https://keys.openpgp.org/, input Full Key ID (i.e., EB4D99E5113E284368955757F18D9D84E60D69E7), or, short Key ID (i.e., F18D9D84E60D69E7, the Last 16 digitals). or, the tagger email address(i.e., sys_oak@intel.com), Click ‘Search’, then you can download the pub key file (i.e., EB4D99E5113E284368955757F18D9D84E60D69E7.asc). The md5sum checksum is 40b0222665a5f6c70ca9d990b4014f43 for the pub key file: $ md5sum EB4D99E5113E284368955757F18D9D84E60D69E7.asc 40b0222665a5f6c70ca9d990b4014f43 EB4D99E5113E284368955757F18D9D84E60D69E7.asc

Once your checksum is correct, please do next step.

iii) Configure your Linux Environment and verify the GPG signature of a tag ( one time setup)

After you get the right pub key, please import it: $ gpg --import EB4D99E5113E284368955757F18D9D84E60D69E7.asc

Now, when you check the tag GPG signature, you can see ‘Good signature’ with a WARNING: $ git tag -v lts-v4.19.282-android_t-230509T073627Z object 180df1199944ebd8928f320a1bd16c8a87dba2ed type commit tag lts-v4.19.282-android_t-230509T073627Z tagger sys_oak sys_oak@intel.com 1683864457 -0700

release Kernel 4.19 for android T Dessert gpg: Signature made Fri 12 May 2023 12:07:37 AM EDT gpg: using RSA key EB4D99E5113E284368955757F18D9D84E60D69E7 gpg: Good signature from "sys_oak (NSWE) sys_oak@intel.com" [unknown] gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. Primary key fingerprint: EB4D 99E5 113E 2843 6895 5757 F18D 9D84 E60D 69E7

To deal with the WARNING, let the pub key be trusted, run ‘gpg --edit-key ’ to edit it ( one time setup) $ gpg --edit-key F18D9D84E60D69E7
input trust input 5 input y input quit

Now, when you check the tag GPG signature again , you can see ‘Good signature’ without warnings: $ git tag -v lts-v4.19.282-android_t-230509T073627Z object 180df1199944ebd8928f320a1bd16c8a87dba2ed type commit tag lts-v4.19.282-android_t-230509T073627Z tagger sys_oak sys_oak@intel.com 1683864457 -0700

release Kernel 4.19 for android T Dessert gpg: Signature made Fri 12 May 2023 12:07:37 AM EDT gpg: using RSA key EB4D99E5113E284368955757F18D9D84E60D69E7 gpg: Good signature from "sys_oak (NSWE) sys_oak@intel.com" [ultimate]