Boot sequence

This page describes the boot sequence of a system built upon PSEC.

Provisioning

The provisioning of the system is not described here, please look at this document.

Steps

• The system is started by the user
• Depending on the provisioning type, the local boot loader or the PXE boot loader is executed
• XEN kernel is loaded
• Linux kernel is loaded
• Initial RAM FS is loaded
• XEN kernel is executed
• Linux kernel is executed
• Root filesystem is mounted
• OpenRC is started
  • Runlevel sysinit is executed
    • Hardware drivers are loaded
    • ...
    • Splash screen is shown
    • ...
  • Runlevel boot is executed
    • ...
• PSEC initialization sequence is started
  • Depending on the provisioning type, Alpine packages may be downloaded from the public repository, including PSEC and specific application packages, into the local repository
  • Also depending on the provisioning type, Alpine ISO image may be downloaded
  • Local PGP key is generated
  • Local repository is signed with the new PGP key
  • PSEC Dom0 daemon is started
    • USB devices are identified and attached to XEN
    • Communication channels are created
      • Message channel
      • Log channel
      • Input channel
    • PSEC packages are installed for the VMs
      • psec-sys-usb
      • psec-sys-gui