PetaLinux tool has system software components (embedded software, TF-A, Linux, U-Boot, OpenAMP, and Yocto framework) and host tool components (AMD Vivado™ Design Suite and AMD Vitis™ software development platform). To upgrade to the latest system software components only, you need to install the corresponding host tools.
The petalinux-upgrade command resolves this
issue by upgrading the system software components without changing the host tool
components. The system software components are upgraded in two steps: by upgrading
the installed PetaLinux tool, and upgrading existing PetaLinux projects. This allows
you to upgrade without having to install the latest version of the Vivado hardware project or Vitis software platform.