ハイパーバイザを作ってみた - Qiita
仮想マシンがどのように実現されているか気になったので、勉強がてら簡単なハイパーバイザを作ってみました。ソースコードはGitHubで公開しています。 方針 RaspberryPi3で動作するAArch64向けのType-1（ベアメタル）ハイパーバイザを作ることにしました。名前は"raspvisor"とします。 スクラッチから作り始める気力はなかったので、なるべく流用できるものは使っていくことにしました。そこで、RaspberryPiのOS開発教材であるRPi OSをハイパーバイザに改造していくことにしました。RPi OSはコード量が少なく読みやすい上、割り込み処理、プロセススケジューラ、ユーザプロセス、システムコール、仮想メモリといった機能が一通り実装されています。OSを改造することにしたのは、プロセス管理や仮想メモリ、割り込み処理といった部分を、ハイパーバイザの実装に流用できそうだと思った
Updates in container isolation [LWN.net]
Did you know...?LWN.net is a subscriber-supported publication; we rely on subscribers to keep the entire operation going. Please help out by buying a subscription and keeping LWN on the net. At KubeCon + CloudNativeCon Europe 2018, several talks explored the topic of container isolation and security. The last year saw the release of Kata Containers which, combined with the CRI-O project, provided
Some notes on macvlan/macvtap « \1
There's not a lot of documentation about these interfaces. Here are some notes to summarize what I've been able to gather so far. Surely there's more to it (corrections and/or more information welcome). Macvlan interfaces can be seen as subinterfaces of a main ethernet interface. Each macvlan interface has its own MAC address (different from that of the main interface) and can be assigned IP addre
Tun/Tap interface tutorial « \1
Foreword: please note that the code available here is only for demonstration purposes. If you want to be serious, you'll have to make it more robust and integrate it with other code. Also, the description is by no means a definitive reference on the subject, but rather the result of my experimentation. Please report any bug or error you find in the code or otherwise in this article. Thanks. Link t
Multiqueue - KVM
Multiqueue virtio-net Overview This page provides information about the design of multi-queue virtio-net, an approach enables packet sending/receiving processing to scale with the number of available vcpus of guest. This page provides an overview of multiqueue virtio-net and discusses the design of various parts involved. The page also contains some basic performance test result. This work is in p
Virtual I/O Device (VIRTIO) Version 1.1
This prose specification is one component of a Work Product that also includes: Example Driver Listing: https://docs.oasis-open.org/virtio/virtio/v1.1/csprd01/listings/ This specification replaces or supersedes: Virtual I/O Device (VIRTIO) Version 1.0. Edited by Rusty Russell, Michael S. Tsirkin, Cornelia Huck, and Pawel Moll. Latest version: https://docs.oasis-open.org/virtio/virtio/v1.0/virtio-v
What is SR-IOV? - Scott's Weblog - The weblog of an IT pro focusing on cloud computing, Kubernetes, Linux, containers, and networking
Scott's Weblog The weblog of an IT pro focusing on cloud computing, Kubernetes, Linux, containers, and networking What is SR-IOV? Published on 2 Dec 2009 · Filed in Explanation · 1131 words (estimated 6 minutes to read) I/O virtualization is a topic that has received a fair amount of attention recently, due in no small part to the attention given to Xsigo Systems after their participation in the G
Deep dive into Virtio-networking and vhost-net
In this post we will explain the vhost-net architecture described in the introduction, to make it clear how everything works together from a technical point of view. This is part of the series of blogs that introduces you to the realm of virtio-networking which brings together the world of virtualization and the world of networking. This post is intended for architects and developers who are inter
Introduction to virtio-networking and vhost-net
Virtio was developed as a standardized open interface for virtual machines (VMs) to access simplified devices such as block devices and network adaptors. Virtio-net is a virtual ethernet card and is the most complex device supported so far by virtio. In this post we will provide a high level solution overview of the virtio-networking architecture, based on establishing an interface between the hos
Multiqueue - KVM
Multiqueue virtio-net Overview This page provides information about the design of multi-queue virtio-net, an approach enables packet sending/receiving processing to scale with the number of available vcpus of guest. This page provides an overview of multiqueue virtio-net and discusses the design of various parts involved. The page also contains some basic performance test result. This work is in p
QEMUのなかみ(QEMU internals) part1 - るくすの日記 ~ Out_Of_Range ~
ここ一ヶ月ほどQEMUのコードとお戯れしていたのですが、 qemuのソースコードもうすぐ読みきりそうなのでどこかにまとめたいんだけど、qemu internalみたいな記事ってどれぐらい需要あるの— 前代未聞 (@RKX1209) 2015, 11月 9 と言ってみた所なんとなく需要がありそうだったので書きました。 本記事ではQEMUの内部実装を追い、具体的な仕組みを見ていきます。もし研究や仕事などでqemuを読む必要がある方や、これから趣味で読んでみようという方はぜひ参考にしてください。 (QEMU internalsというよりはQEMUコードリーディングの方が適切かもしれませんね....) さてここで扱うQEMUはqemu2.4.0でゲストはx86,ホストはx64であると仮定します。 両方共x86系となるとDBTの意味はあまり無く、KVM使ってどうぞという話になるのですが、あくまでコー
Xen
The Xen Project wiki is a support and documentation resource for the Xen Project community. It is editable by community members and we need your contributions to make it better. The Xen Project Wiki has been subject to sustained severe spam attacks in the last few years. To solve this and keep the wiki usable for everyone, we had to lock down the wiki and create an editors group. CAPTCHAs do not a
Google Cloud kicked QEMU to the kerb to harden KVM
Alphabet subsidiary decided hardware emulator that's plagued Xen had to go Google has revealed how it hardened the open source KVM hypervisor to run in its cloud. Removing the QEMU hardware emulation tool looks to be a big part of its efforts. Google Cloud's technical lead manager Andy Honig and senior product manager Nelly Porter write that the company decided it needed to develop its own alterna
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kvm interrupt emulation
Container Isolation at Scale (... and introducing gVisor)
The Definitive KVM (Kernel-based Virtual Machine) API Documentation
Blending Containers and Virtual Machines: A Study of Firecracker and gVisor
Virtualized bridged networking with MacVTap - Seravo
CPU Steal Time 入門 - Qiita
HowTo Configure SR-IOV for ConnectX-4/ConnectX-5 with KVM (Ethernet)