Custom kernel

BUILD.md

@@ -17,7 +17,7 @@ The reason for halting and upping is to load any new kernel updates that was ins
 ### 3. Build patchOS
 
 ```sh
-$ vagrant ssh -c "sudo /vagrant/vagrant-build"
+$ vagrant ssh -c "/vagrant/vagrant-build"
 ```
 
 This will take about 40 minutes on a half decent laptop.

Vagrantfile

@@ -13,17 +13,20 @@ Vagrant.configure("2") do |config|
   config.vm.provision "shell", inline: <<-SHELL
     sudo echo "Server = http://mirror.archlinux.no/\\$repo/os/\\$arch" > /etc/pacman.d/mirrorlist
     sudo pacman -Syu --noconfirm
-    sudo pacman -S base-devel parted dosfstools gcc-libs wget rsync git python2 --noconfirm
-    rm -Rf yay-git
+    sudo pacman -S base-devel xmlto kmod inetutils libelf bc bison flex ncurses parted dosfstools gcc-libs wget rsync git python2 --noconfirm
+    sudo echo 'MAKEFLAGS="-j$(($(nproc) + 1))"' >> /etc/makepkg.conf
     su vagrant -c "git clone https://aur.archlinux.org/yay-git.git"
     cd yay-git
     su vagrant -c "makepkg -si --skipchecksums --noconfirm"
     su vagrant -c "yay -Syu --noconfirm"
-    su vagrant -c "gpg --recv-key 9766E084FB0F43D8"
+    su vagrant -c "gpg --keyserver keys.gnupg.net --recv-key 45F68D54BBE23FB3039B46E59766E084FB0F43D8"
+    su vagrant -c "gpg --keyserver keys.gnupg.net --recv-key CEACC9E15534EBABB82D3FA03353C9CEF108B584"
+    su vagrant -c "yay -S binfmt-qemu-static-all-arch qemu-user-static --noconfirm"
     su vagrant -c "yay -S binfmt-qemu-static-all-arch qemu-user-static --noconfirm"
     sudo systemctl restart systemd-binfmt.service
     wget https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh
     chmod +x pishrink.sh
     sudo mv pishrink.sh /usr/local/bin
+    su vagrant -c "git clone --depth=1 https://github.com/raspberrypi/tools ~/tools"
   SHELL
 end

build

@@ -35,9 +35,6 @@ pacman -S --noconfirm \
 	python-flask-socketio \
 	python-eventlet
 
-# Enable all cores for building
-echo 'MAKEFLAGS="-j$(nproc)"' >> /etc/makepkg.conf
-
 # Rename default user
 sed -i "s/alarm/patch/g" /etc/passwd /etc/group /etc/shadow
 mv /home/alarm "/home/patch"

kernel-build

@@ -0,0 +1,19 @@
+#!/bin/bash -xe
+
+git clone --depth=1 https://github.com/raspberrypi/linux.git -b rpi-5.4.y /home/vagrant/linux
+cp /vagrant/linux/* /home/vagrant/linux
+cd /home/vagrant/linux
+mv config .config
+
+# Fix "multiple definition of `yylloc'" lexer error
+sed -i 's/^YYLTYPE yylloc;$/extern YYLTYPE yylloc;/' scripts/dtc/dtc-lexer.l
+
+# Apply Preepmt-RT patch
+curl http://cdn.kernel.org/pub/linux/kernel/projects/rt/5.4/patch-5.4.40-rt24.patch.gz | gunzip > patch-5.4.40-rt24.patch
+git apply patch-5.4.40-rt24.patch
+
+PATH=$PATH:/home/vagrant/tools/arm-bcm2708/arm-linux-gnueabihf/bin
+KERNEL=kernel7l
+make -j $(($(nproc) + 1)) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- prepare
+make -j $(($(nproc) + 1)) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage modules dtbs
+sudo env PATH=$PATH make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=/mnt modules_install

linux/60-linux.hook

@@ -0,0 +1,12 @@
+[Trigger]
+Type = File
+Operation = Install
+Operation = Upgrade
+Operation = Remove
+Target = usr/lib/modules/%KERNVER%/*
+Target = usr/lib/modules/%EXTRAMODULES%/*
+
+[Action]
+Description = Updating %PKGBASE% module dependencies...
+When = PostTransaction
+Exec = /usr/bin/depmod %KERNVER%

linux/90-linux.hook

@@ -0,0 +1,12 @@
+[Trigger]
+Type = File
+Operation = Install
+Operation = Upgrade
+Target = boot/kernel.img
+Target = boot/kernel7.img
+Target = usr/lib/initcpio/*
+
+[Action]
+Description = Updating %PKGBASE% initcpios...
+When = PostTransaction
+Exec = /usr/bin/mkinitcpio -p %PKGBASE%

linux/cmdline.txt

@@ -0,0 +1 @@
+root=/dev/mmcblk0p2 rw rootwait console=ttyAMA0,115200 console=tty1 selinux=0 plymouth.enable=0 smsc95xx.turbo_mode=N dwc_otg.lpm_enable=0 kgdboc=ttyAMA0,115200 elevator=noop