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Starting with 2023.1 the Kria Starter Kits embedded Linux reference image has been built natively in Yocto to support users not using the Xilinx specific PetaLinux tool. The Kria Yocto reference image is built to support multiple platforms while the PetaLinux BSPs only support a single static HW configuration. Thus you will find a Yocto reference image that supports both K26 Starter Kits (KV260, KR260), while PetaLinux has a 1-to-1 mapping of BSPs to individual platforms. For additional details on Kria platform Yocto support see the Kria App Dev Guide. For details on Yocto vs PetaLinux support for KRia, refer to https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1641152513/Kria+SOMs+Starter+Kits#Yocto-Vs-PetaLinux-Support-and-Released-Artifacts. Yocto image default login:
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The K24 Kria Starter Kits embedded Linux reference image has been built natively in Yocto to support users not using the Xilinx specific PetaLinux tool. The Kria Yocto reference image is built to support multiple platforms while the PetaLinux BSPs only support a single static HW configuration. Thus you will find a Yocto reference image that supports both K24 Starter Kits (KD240), while PetaLinux has a 1-to-1 mapping of BSPs to individual platforms. For additional details on Kria platform Yocto support see the Kria App Dev GuideDev Guide. For additional details on Kria platform Yocto support see the Kria App Dev Guide. For details on Yocto vs PetaLinux support for KRia, refer to https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1641152513/Kria+SOMs+Starter+Kits#Yocto-Vs-PetaLinux-Support-and-Released-Artifacts. Yocto image default login:
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Ubuntu LTS | PetaLinux | |
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Intent | Support of a great OOB experience with a desktop environment and a rich set of Linux libraries available and tested as part of the Ubuntu community. Intended initially as an evaluation and early development platform on Kria, it can also be used for production with Canonical's assistance. | Embedded Linux development tool focused on Xilinx silicon and device specific feature enablement via board support packages (BSPs) and pre-built reference(s). |
Updates | Kria Ubuntu OS is a Canonical certified OS that is supported with regular updates (e.g. security patches) from Canonical. A new LTS version of Ubuntu is provided every two years and each release is supported by Canonical for up to 10 years. | Snapshot image release aligned with Xilinx tools release (e.g. 2022.1) with no regular/planned updates until next Xilinx tools release (e.g. 2022.2). |
Pre-built apps | Kria example application final end-to-end verification and pre-built public release will be to the Ubuntu OS. | Kria example applications will build inside the PetaLinux tool but will not be fully verified nor released as pre-built packages. |
Application customization | User can customize userspace applications via on-target development and/or standard Ubuntu development tools/workflows. | User can customize userspace applications via on-target development and/or PetaLinux supported cross-compilation environment. |
Kernel customization | LTS certified kernel is maintained by Canonical. User can modify and build their own derivative kernel but is then outside the scope of the certified image and Canonical support. | Tool enables full customization of the kernel. |
Path to production | If user requires an officially certified and supported Ubuntu OS for their production system they must reach out to Canonical. Production systems are assumed to have custom hardware (carrier card or chip down). If any modifications to Ubuntu are needed to support custom hardware customers are encouraged to engage directly with Canonical to maintain certification. https://ubuntu.com/support Canonical has very strict rules about what can be labeled as Ubuntu - please see more here: https://ubuntu.com/legal/intellectual-property-policy | User can use the PetaLinux and or Yocto to create their own fully custom embedded Linux. |
Development Flow | On-target compilation. Cross-compilation. Sysroot provided by Canonical. | On-target compilation. Cross-compilation. Sysroot provided by Yocto eSDK - Tight integration with Vivado & Vitis tool sets. |
Xilinx Tools Support
Yocto Build instructions
Starting from 2023.1, there is Yocto support for Kria SOM Starterkits. Refer to Yocto Kria Support documentation for more information. There are support for generating .wic image, boot.bin or qspi images.
PetaLinux Board Support Packages
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You will find new boot firmware at /image/linux/BOOT.BIN. The new BOOT.BIN can be loaded to the Starter Kit using the xmutil bootfw_update utility described above
Yocto Build instructions
Starting from 2023.1, there is Yocto support for Kria SOM Starterkits. Refer to Yocto Kria Support documentation for more information. Note that to generate boot firmware, use kria-qspi bitbake recipe - it generates artifacts for QSPI, which includes BOOT.bin.
Yocto Vs PetaLinux Support and Released Artifacts
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