PetaLinux Configuration and Build System Image - 2022.1 English

Steps to configure PetaLinux for SD card ext file system boot and build the system image are as follows:

1. Change to root directory of your PetaLinux project.

   $ cd <plnx-proj-root>

2. Launch top level system configuration menu.

   $ petalinux-config

3. Select Image Packaging Configuration > Root file system type.
4. Select EXT4 (SD/eMMC/SATA/USB) as the root file system type.
   Note: Choose this setting to configure your PetaLinux build for EXT root. By default, it adds the SD/eMMC device name in bootargs. For other devices (SATA/USB), you must change the ext4 device name, as shown in the following examples:

   • eMMC or SD root = /dev/mmcblkYpX
   • SATA or USB root= /dev/sdX
5. Exit menuconfig and save configuration settings.
   Note: The boot arguments is automatically updated in the <plnx-proj-root>/components/plnx_workspace/device-tree/device-tree/system-conf.dtsi. These changes are reflected only after the build.
6. Build PetaLinux images. For more information, see Build System Image.
7. Generate boot image. For more information, see Generate Boot Image for Zynq UltraScale+ MPSoC.
8. The generated rootfs.tar.gz file is present in images/linux directory. To extract, use tar xvf rootfs.tar.gz.