riscv-software-src/opensbi

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1524 stars · 708 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

OpenSBI is the open-source reference implementation of the RISC-V Supervisor Binary Interface (SBI) specification, running as firmware in M-mode. It provides a platform-independent static library (libsbi.a) plus platform-specific firmware builds that bootloaders, hypervisors, and operating systems rely on at boot time.

Use cases

• boot a RISC-V operating system or bootloader from M-mode firmware
• implement RISC-V SBI specification conformance for a custom SoC
• provide SBI call handling for a hypervisor running in HS-mode
• extend platform firmware for a specific RISC-V hardware configuration
• bring up early console and inter-processor interrupts on a RISC-V board
• build a minimal M-mode runtime for RISC-V kernel development

When to choose

• you are building or booting an OS, bootloader, or hypervisor on RISC-V hardware
• you are a SoC or platform vendor needing a conformant SBI firmware base to extend
• you need a well-maintained, spec-compliant reference implementation of RISC-V SBI

When to avoid

• you need userspace application software rather than low-level firmware
• you are targeting non-RISC-V architectures such as ARM or x86
• you need a full bootloader like U-Boot rather than the SBI layer beneath it

Facets

library · maturity active

embedded sdk developer-tools embedded-systems operating-systems hardware developer-tools embedded c firmware bootloader risc-v sbi m-mode bare-metal linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="riscv-software-src/opensbi")