Linux on RISC-V and the New OS-A Platform

Overview

Explore the exciting developments in Linux on RISC-V and the new OS-A platform in this informative conference talk. Delve into the essential components required for booting Linux on RISC-V, including the Privileged Architecture, OpenSBI, and U-Boot, and understand how they align with the upcoming RISC-V Platform Specification. Gain insights into the support for existing hardware and ongoing upstreaming efforts. Learn about the arch/riscv maintenance guidelines designed to minimize unnecessary changes as the landscape of RISC-V extensions continues to evolve. Discover key concepts such as RISC-V base integer registers, standard extensions, the open-source ecosystem, virtual memory, and the Advanced Interrupt Architecture. Examine the Supervisor Binary Interface (SBI), hypervisor extension, and UEFI support. Explore RISC-V emulation in QEMU, recent developments in the Linux kernel, and popular Linux distributions for RISC-V. Investigate ongoing work on page-based memory types, cache management operations, and get acquainted with RISC-V developer boards.

Syllabus

Intro
What is different about RISC-V?
RISC-V base integer registers
RISC-V Standard Extensions
RISC-V International
RISC-V Open Hours
RISC-V open source cores
RISC-V software ecosystem
RISC-V Privileged Architecture
Control and Status Registers (CSRs)
RISC-V Virtual Memory
What is a Hart?
Advanced Interrupt Architecture (AIA)
Supervisor Binary Interface (SBI)
SBI Extensions
Hypervisor extension
OpenSBI Generic Platform
UEFI Support
RISC-V Platform Specification
RISC-V ACPI Platform Specification
RISC-V emulation in QEMU
RISC-V in the Linux kernel
Linux 5.18
Upcoming Linux 6.0
Work in progress
Linux distro: Fedora
Linux distro: Ubuntu
OpenEmbedded and Yocto
BuildRoot
T-Head PTE format
Page-Based Memory Types extension
Svpbmt support in Linux
Cache Management Operations
CMO support in Linux
RISC-V Developer Boards