Managing patch series can be one of the most time-consuming aspects of contributing to large open-source projects like U-Boot and Linux. While patman has long been a powerful tool for creating, checking, and sending patches, the relatively new patman series feature takes workflow management to the next level by providing lifecycle management for series, with…
The EFI app on x86 has supported booting for a while. With a recent 19-part series, the EFI app can now also boot an OS on ARM. This uses standard boot and the standard extlinux boot flow. The Core Fixes To successfully hand off control from the EFI environment to a new operating system, a…
For a while now, U-Boot’s EFI application (efi_app) has been a handy tool, but with one noticeable difference between architectures: x86 could show things on the screen, while ARM was stuck in the dark. If you wanted a splash screen or a graphical boot menu in your ARM EFI app, you were out of luck….
The Flattened Image Tree (FIT) is at the heart of modern U-Boot booting, providing a flexible and verifiable way to package kernels, ramdisks, and devicetrees. A new series introduces a significant enhancement to how U-Boot processes FITs, enabling a powerful two-stage boot process. This allows a “load-only” FIT to configure the system (like setting up…
In the world of embedded systems, a Flattened Image Tree (FIT) is the standard way to package a bootable OS, typically bundling the kernel, a ramdisk, and the necessary devicetree (FDT) into a single, verifiable file. While convenient, this approach tightly couples the OS with its hardware description. But what if the OS and the…
We’re excited to announce a significant new feature in U-Boot: a virtio-scsi driver. While U-Boot has long supported virtio-blk for block device access in virtualized environments, virtio-scsi offers greater flexibility, allowing a single virtio device to host multiple disks (LUNs) and supporting features like hotplug. This comprehensive 27-patch series, does more than just add a…
U-Boot Concept now supports the EFI Boot Graphics Resource Table (BGRT) feature. This enhancement allows for a more seamless and branded boot experience on devices that use EFI_LOADER, i.e. the Unified Extensible Firmware Interface (UEFI). What is BGRT? The BGRT is a table in the ACPI (Advanced Configuration and Power Interface) that allows the firmware…
Welcome to the new official blog for Das U-Boot! For over two decades, the U-Boot mailing list has been the vibrant hub of our development discussions. While the mailing list remains our primary channel for patches and technical conversations, this blog will serve as a new platform to share deeper insights, project news, and community…