Arm Barriers 101: Part #4: Speculation And Break-Before-Make

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Arm Barriers 101: Part #4: Speculation And Break-Before-Make
Published 5/2025
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz
Language: English | Size: 3.92 GB | Duration: 2h 53m
Defending against Spectre/Meltdown and performing break-before-make sequences.
What you'll learn


Discover how speculative side-channel attacks like Spectre and Meltdown work.
Explore how to use barriers to control speculation.
Investigate some of the nasty, horrible-to-debug issues that can occur when making certain modifications to the page tables.
Learn how to use barriers and break-before-make sequences to prevent these issues from occurring.
Requirements
Beginner friendly!
Assumes no prior Arm Architecture experience.
Some basic C/C++ programming experience is recommended, but not required.
Strongly recommended to take our "Arm Barriers 101: Part #3: Expanding our toolkit" course first.
Description
Welcome to Part 4 of our Barriers 101 training course, a comprehensive deep dive on barriers in the Arm® Architecture.This course is suitable for software engineers working on Arm-based platforms on system-level software, from down at the firmware layer all the way up through to the kernel, hypervisor, and device drivers.In these lessons, you'll learn:How speculative side-channel attacks like Spectre and Meltdown work.How we can use barriers to control speculation and to defend against these kinds of attacks.How failing to correctly perform break-before-make sequences when making certain modifications to the page tables may lead to all sorts of nasty, horrible-to-debug issues.How to use barriers to correctly perform such sequences.From beginner to expert: Our courses are suitable for all levels of experience, whether you're already a seasoned veteran of the Arm Architecture or you're seeing Arm Barriers for the very first time.How it really works: Our courses go both broader and deeper on the topic of barriers than anyone else; we show you how things really work, and more importantly, why.Learning is doing: Reinforce your learning with 30 multiple-choice quiz questions including a video walkthrough of each question and answer, followed by a full course revision session touching on every lesson from all four parts of the entire Barriers 101 training course.Recognised trainer: Our courses are written and produced by Ash Wilding, formerly one of Arm's lead technical trainers and a kernel engineer at both Amazon AWS and Apple.
Overview
Section 1: Spectre, Meltdown, and break-before-make
Lecture 1 Introduction to Spectre and Meltdown
Lecture 2 Controlling speculation through barriers
Lecture 3 Break-before-make sequences
Lecture 4 Quiz
Lecture 5 Barriers 101 full course revision session
Engineers at all experience levels working on Arm-based platforms.,Firmware Engineers.,Kernel Engineers.,Hypervisor Engineers.,Device Driver Engineers.


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