Xen Directions HXEN
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Project HXEN is a type 2 virtual machine manager that runs as a kernel module in an operating system, allowing it to leverage existing device drivers and provide a more seamless "application view" experience compared to traditional type 1 hypervisors. It uses a kernel module called HXEN.sys that manages virtual machines running applications while still providing security and isolation comparable to a type 1 hypervisor by using the Xen hypervisor underneath.
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Xen Directions HXEN Slides
Project HXEN aims to provide a type 2 virtual machine manager by implementing Xen's hypervisor functionality as a kernel module in the host operating system. This allows virtual machines to utilize existing device drivers in the operating system while still providing security and isolation comparable to a type 1 hypervisor. The HXEN kernel module would sit between guest virtual machines and the host operating system, allowing resources like video, network, disk, keyboard, and mouse to be passed through to virtual machines via an application like Ioemu.exe. Links are provided to download object and source code for the HXEN proof-of-concept as well as contact a mailing list for support and discussion.
Xen: Hypervisor for the Cloud - CCC13
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Xen Community Update 2011
The document provides an update on the Xen community. It discusses welcoming a new community manager, development activity levels being high, the Xen 4.1 release featuring new capabilities, interactions with other communities like Linux and OpenStack, and secure isolation remaining a top priority through techniques like driver domains. It also proposes a reference architecture to help products better take advantage of Xen's security and reliability benefits through features like restartable driver domains.
Xen architecture q1 2008
Xen is an open source hypervisor that allows multiple virtual machines to run concurrently on a single physical machine. The key components are the Xen hypervisor, Domain 0 which has special privileges, and Domain U guest virtual machines. Domain 0 manages the other domains and provides access to physical resources. Domain U guests can be paravirtualized (PV) or fully virtualized (HVM). PV guests have drivers for networking and storage, while HVM guests use Qemu-dm and virtual firmware to emulate hardware. Management tools like Xend and Xenstored control the virtual machines through an XML RPC interface.
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My presentation on the paper: Xen and the Art of Virtualization by Paul Barham, Boris Dragovic, Keir Fraser, Steven Hand, Tim Harris, Alex Ho, Rolf Neugebauer, Ian Pratt, Andrew Warfield. Prepared for CSCI 297 - Advanced Operating System at GWU, Spring 2010
Xen.org Overview 2009
The document discusses Xen, an open source hypervisor project. It provides a brief history of Xen starting in 2002. It describes Xen's key features including support for hardware virtualization, high performance, and security. The mission of the Xen Project is to establish the hypervisor as the industry standard and maintain performance and stability while supporting a wide range of systems. An advisory board oversees the project and community.
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Hypervisors were once seen as purely cloud and server technologies, but have slowly seeped into the embedded space providing extra layers of security. This discussion will showcase how companies from security vendors to automotive are using open source hypervisors (particularly Xen Project) to secure embedded systems, what challenges they face and how they have overcome it. We will also explore what this might mean to IoT at large and how to get started in securing your embedded system with a hypervisor-first approach.
Hypervisors were once seen as purely cloud and server technologies, but have slowly seeped into the embedded space providing extra layers of security. This discussion will showcase how companies from security vendors to automotive are using open source hypervisors (particularly Xen Project) to secure embedded systems, what challenges they face and how they have overcome it. We will also explore what this might mean to IoT at large and how to get started in securing your embedded system with a hypervisor-first approach.
The topic will cover content such as: * Why virtualisation in embedded * Hypervisor architectures on ARM and a quick roundup of examples * Relevant security technologies * Specific requirements for embedded systems * Example usage of FOSS based hypervisors in embedded * Challenges such as safety certification and how this may be approached
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The document discusses Xen, an open source hypervisor project. It provides a quote from Werner Vogels of Amazon praising Xen for its ease of use and active developer community. It then gives a brief history of Xen and overview of its current mission and governance through an advisory board and community of partners.
Recommended
Xen Directions HXEN Slides
Project HXEN aims to provide a type 2 virtual machine manager by implementing Xen's hypervisor functionality as a kernel module in the host operating system. This allows virtual machines to utilize existing device drivers in the operating system while still providing security and isolation comparable to a type 1 hypervisor. The HXEN kernel module would sit between guest virtual machines and the host operating system, allowing resources like video, network, disk, keyboard, and mouse to be passed through to virtual machines via an application like Ioemu.exe. Links are provided to download object and source code for the HXEN proof-of-concept as well as contact a mailing list for support and discussion.
Xen: Hypervisor for the Cloud - CCC13
Talk given by Xen Project Evangelist Russ Pavlicek at CloudStack Collaboration Conference 2013 in Santa Clara, CA
Xen Community Update 2011
The document provides an update on the Xen community. It discusses welcoming a new community manager, development activity levels being high, the Xen 4.1 release featuring new capabilities, interactions with other communities like Linux and OpenStack, and secure isolation remaining a top priority through techniques like driver domains. It also proposes a reference architecture to help products better take advantage of Xen's security and reliability benefits through features like restartable driver domains.
Xen architecture q1 2008
Xen is an open source hypervisor that allows multiple virtual machines to run concurrently on a single physical machine. The key components are the Xen hypervisor, Domain 0 which has special privileges, and Domain U guest virtual machines. Domain 0 manages the other domains and provides access to physical resources. Domain U guests can be paravirtualized (PV) or fully virtualized (HVM). PV guests have drivers for networking and storage, while HVM guests use Qemu-dm and virtual firmware to emulate hardware. Management tools like Xend and Xenstored control the virtual machines through an XML RPC interface.
Xen & the Art of Virtualization
My presentation on the paper: Xen and the Art of Virtualization by Paul Barham, Boris Dragovic, Keir Fraser, Steven Hand, Tim Harris, Alex Ho, Rolf Neugebauer, Ian Pratt, Andrew Warfield. Prepared for CSCI 297 - Advanced Operating System at GWU, Spring 2010
Xen.org Overview 2009
The document discusses Xen, an open source hypervisor project. It provides a brief history of Xen starting in 2002. It describes Xen's key features including support for hardware virtualization, high performance, and security. The mission of the Xen Project is to establish the hypervisor as the industry standard and maintain performance and stability while supporting a wide range of systems. An advisory board oversees the project and community.
Fosdem 18: Securing embedded Systems using Virtualization
Hypervisors were once seen as purely cloud and server technologies, but have slowly seeped into the embedded space providing extra layers of security. This discussion will showcase how companies from security vendors to automotive are using open source hypervisors (particularly Xen Project) to secure embedded systems, what challenges they face and how they have overcome it. We will also explore what this might mean to IoT at large and how to get started in securing your embedded system with a hypervisor-first approach.
Hypervisors were once seen as purely cloud and server technologies, but have slowly seeped into the embedded space providing extra layers of security. This discussion will showcase how companies from security vendors to automotive are using open source hypervisors (particularly Xen Project) to secure embedded systems, what challenges they face and how they have overcome it. We will also explore what this might mean to IoT at large and how to get started in securing your embedded system with a hypervisor-first approach.
The topic will cover content such as: * Why virtualisation in embedded * Hypervisor architectures on ARM and a quick roundup of examples * Relevant security technologies * Specific requirements for embedded systems * Example usage of FOSS based hypervisors in embedded * Challenges such as safety certification and how this may be approached
Xen Overview Q22009 En
The document discusses Xen, an open source hypervisor project. It provides a quote from Werner Vogels of Amazon praising Xen for its ease of use and active developer community. It then gives a brief history of Xen and overview of its current mission and governance through an advisory board and community of partners.
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The Xen Project is used by more than 10 million users, powers some of the largest clouds on the planet, and is starting to build momentum in embedded and safety-conscious market segments. It is also nearly 16 years old.
The Xen Project’s success and longevity can be attributed to its flexible architecture, but more importantly to enabling community members to contribute ideas and code, even if they are not core to the project's main use-case. This has brought Xen far beyond server virtualization.
Lars will share how the project has supported new technologies and ideas, which may include some really interesting things you might not know about Xen (especially around defense applications), and will derive best practices that may help other projects.
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Xen has been very successful on servers, and yet there are substantial areas where Xen can evolve further. In this talk Jun will discuss a compelling area where the Xen technologies can be applied to -- Mobile virtualization. Using Android as an example, the talk will explore two types of usage models, 1) Android as a guest, 2) Android as the host, showing the benefits of using the Xen technologies.
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The Xen Project supports some of the biggest clouds in production today and is moving into new industries, like security and automotive. Usually, you will use Xen indirectly as part of a commercial product, a distro, a hosting or cloud service and only indirectly use Xen. By following this session you will learn how Xen and virtualization work under the hood exploring high-level topics like architecture concepts related to virtualization to more technical attributes of the hypervisor like memory management (ballooning), virtual CPUs, scheduling, pinning, saving/restoring and migrating VMs.
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PVOPS has added Dom0 support to Linux 3.0 and ongoing work in 3.1 including new modules. Planned work includes features like HW clock support and 3D graphics.
Xen 4.1 was recently released with large system support up to 4TB and 255 CPUs. Security enhancements include CPU pools and memory introspection.
The XCP project aims to make the XenAPI toolstack independent of distributions and deliverable via common package managers. This would allow XCP to become the Xen community platform.
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This talk with discuss the design and implementation of a new type of hypervisor derived from the Xen code base. µ-Xen has been built and optimized for modern CPUs and chipsets, and thus assumes the presence of CPU and IO MMUs that are virtualization capable. µ-Xen borrows extensively from the production-proven and tuned Xen code base, but removal of support for older hardware and PV-MMU guests has enabled significant simplification of the code. µ-Xen supports optimizations in support of running large numbers of very similar virtual machines, through the support of a native 'vmfork' optimization and efficient re-merging of shareable pages.
The primary goal of µ-Xen has been to run as a late-load hypervisor on an existing OS. It has a narrow and well-defined interface to the services it expects from the underlying OS, which makes it easy to port to other OSes, or to enable it to run on bare metal. During initialisation, µ-Xen can de-privilege the running host OS into a VM container, enabling it to establish itself as the most privileged software component in the system. Thus, µ-Xen enforces the privacy and integrity of itself and VMs that it is running, against a faulty or malicious host OS, while co-operating with the host OS on the actual allocation of physical resources.
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Disaggregation of services provided by the platform will be a key of this talk. It will also be shown how third party software components can provide services to VMs in a secure and controlled way.
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ATG needed to virtualize over 2,000 remote betting terminals to allow for hardware independence and an evolutionary transition from older OS/2 systems to newer Linux systems. They implemented the open source Xen hypervisor which allowed them to run existing OS/2 applications virtually on new Linux machines, transition applications to a new Java platform gradually, and gain more flexibility and influence over the hypervisor development. This provided a cost effective solution to modernize systems while maintaining existing functionality during the transition.
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This document summarizes a presentation on the Xen hypervisor. It begins with an introduction explaining that Xen allows multiple virtual machines to run simultaneously on one physical computer. It was developed by Xen Source and released in 2003 as open source software. Xen uses para-virtualization, requiring guest operating systems to be modified for its environment. The document then describes Xen's features such as being a type-1 hypervisor that controls hardware directly. It supports various guest operating systems. The architecture of Xen including its components like the hypervisor, Domain-0, and guest virtual machines is explained. Advantages like consolidation and costs savings are contrasted with disadvantages like service reliability. A comparison of Citrix XenServer and VMware shows XenServer is open source while VM
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The talk was delivered at Root Linux Conference 2017. Learn more: http://linux.globallogic.com/materials. The video is available at https://www.youtube.com/watch?v=sjQnAIJji4k
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It is no accident that Xen software powers some of the largest Clouds in existence. From its outset, the Xen Project was intended to enable what we now call Cloud Computing.
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EmbeddedXEN is a particularly efficient virtualization framework tailored to ARM-based core embedded systems.
While security and OS isolation are key features of conventional virtualizuation frameworks, the main concerns for EmbeddedXEN are device heterogeneity and realtime aspects, which are particularly important in the embedded world.
EmbeddedXEN mainly relies on the original XEN architecture but with major differences in the way guest OS are handled: the hypervisor has been simplified, and only two guest OS (dom0 and domU) can run simultaneously; while dom0 is used to manage the native OS with drivers (original and backend splitted drivers), a paravirtualized OS (domU) can be cross-compiled on a different ARM device, and user applications can run seamlessly on the (virtualized) host device. Another important difference is that no user space tools are required to manage the VMs; the framework produces a compact single binary image containing both dom0 and domU guests, which can be easily deployed. The Xenbus architecture has been adapted to that context.
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This document summarizes security vulnerabilities in the Xen hypervisor virtualization platform. It describes two attacks:
1) A denial of service attack where a malicious domain can pad a large file to its kernel image, consuming significant system resources during booting and preventing other domains from accessing resources.
2) An attack where an insider with dom0 privileges can use the "dump-core" command to take a memory snapshot of a target domain, allowing extraction of plaintext passwords and sensitive data from the domain's memory.
The document analyzes these issues and argues that Xen's architecture, with the dom0 control domain having elevated privileges, is the root cause of vulnerabilities. It suggests the privileges of dom0 should be reduced to
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The Xen Project is used by more than 10 million users, powers some of the largest clouds on the planet, and is starting to build momentum in embedded and safety-conscious market segments. It is also nearly 16 years old.
The Xen Project’s success and longevity can be attributed to its flexible architecture, but more importantly to enabling community members to contribute ideas and code, even if they are not core to the project's main use-case. This has brought Xen far beyond server virtualization.
Lars will share how the project has supported new technologies and ideas, which may include some really interesting things you might not know about Xen (especially around defense applications), and will derive best practices that may help other projects.
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Xen has been very successful on servers, and yet there are substantial areas where Xen can evolve further. In this talk Jun will discuss a compelling area where the Xen technologies can be applied to -- Mobile virtualization. Using Android as an example, the talk will explore two types of usage models, 1) Android as a guest, 2) Android as the host, showing the benefits of using the Xen technologies.
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Note: also see https://www.slideshare.net/xen_com_mgr/ossna18-xen-beginners-training-exercise-script
The Xen Project supports some of the biggest clouds in production today and is moving into new industries, like security and automotive. Usually, you will use Xen indirectly as part of a commercial product, a distro, a hosting or cloud service and only indirectly use Xen. By following this session you will learn how Xen and virtualization work under the hood exploring high-level topics like architecture concepts related to virtualization to more technical attributes of the hypervisor like memory management (ballooning), virtual CPUs, scheduling, pinning, saving/restoring and migrating VMs.
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PVOPS has added Dom0 support to Linux 3.0 and ongoing work in 3.1 including new modules. Planned work includes features like HW clock support and 3D graphics.
Xen 4.1 was recently released with large system support up to 4TB and 255 CPUs. Security enhancements include CPU pools and memory introspection.
The XCP project aims to make the XenAPI toolstack independent of distributions and deliverable via common package managers. This would allow XCP to become the Xen community platform.
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This talk with discuss the design and implementation of a new type of hypervisor derived from the Xen code base. µ-Xen has been built and optimized for modern CPUs and chipsets, and thus assumes the presence of CPU and IO MMUs that are virtualization capable. µ-Xen borrows extensively from the production-proven and tuned Xen code base, but removal of support for older hardware and PV-MMU guests has enabled significant simplification of the code. µ-Xen supports optimizations in support of running large numbers of very similar virtual machines, through the support of a native 'vmfork' optimization and efficient re-merging of shareable pages.
The primary goal of µ-Xen has been to run as a late-load hypervisor on an existing OS. It has a narrow and well-defined interface to the services it expects from the underlying OS, which makes it easy to port to other OSes, or to enable it to run on bare metal. During initialisation, µ-Xen can de-privilege the running host OS into a VM container, enabling it to establish itself as the most privileged software component in the system. Thus, µ-Xen enforces the privacy and integrity of itself and VMs that it is running, against a faulty or malicious host OS, while co-operating with the host OS on the actual allocation of physical resources.
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This talk will discuss the challenges of client virtualization and introduce at a technical level XenClient XT, a security-oriented client virtualization product by Citrix. By describing XenClient XT architecture and features, it will be shown how the unique Xen's design and its support for modern x86 platform hardware can increase security and isolation among VMs.
Disaggregation of services provided by the platform will be a key of this talk. It will also be shown how third party software components can provide services to VMs in a secure and controlled way.
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Xen ATG case study
ATG needed to virtualize over 2,000 remote betting terminals to allow for hardware independence and an evolutionary transition from older OS/2 systems to newer Linux systems. They implemented the open source Xen hypervisor which allowed them to run existing OS/2 applications virtually on new Linux machines, transition applications to a new Java platform gradually, and gain more flexibility and influence over the hypervisor development. This provided a cost effective solution to modernize systems while maintaining existing functionality during the transition.
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This document summarizes a presentation on the Xen hypervisor. It begins with an introduction explaining that Xen allows multiple virtual machines to run simultaneously on one physical computer. It was developed by Xen Source and released in 2003 as open source software. Xen uses para-virtualization, requiring guest operating systems to be modified for its environment. The document then describes Xen's features such as being a type-1 hypervisor that controls hardware directly. It supports various guest operating systems. The architecture of Xen including its components like the hypervisor, Domain-0, and guest virtual machines is explained. Advantages like consolidation and costs savings are contrasted with disadvantages like service reliability. A comparison of Citrix XenServer and VMware shows XenServer is open source while VM
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Xen Project started 15 years ago with goals of server consolidation and cloud computing. It achieved a diverse ecosystem through its modular design, acceptance of security contributions, and use in diverse products from military clouds to desktops. New uses in embedded, automotive, and security products emerged from tensions between core and non-core usage as well as sedimentation of software features into hardware. The culture of accepting changes and managing tensions between priorities enabled ongoing innovation.
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This talk provides an overview of the Xen Project eco-system and its main use-cases in a number of important market segments: it covers server virtualization, cloud computing and embedded, automotive and related. Lars Kurth highlights why the Xen Project is relevant in these market segments: he provides an overview of the Xen Project's architecture, relevant existing functionality and ongoing and planned developments. To complement the picture, he covers open-source projects that are related to Xen and are of interest for these use-cases. Excellent Software security is key to all of these use-cases. Thus, Lars specifically covers the Xen Project's security features, track record and touches on the project's security practices. He concludes with a few resources that help you get started with the Xen Project and highlight Internship Programs which the project supports.
The talk was delivered at Root Linux Conference 2017. Learn more: http://linux.globallogic.com/materials. The video is available at https://www.youtube.com/watch?v=sjQnAIJji4k
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It is no accident that Xen software powers some of the largest Clouds in existence. From its outset, the Xen Project was intended to enable what we now call Cloud Computing.
This session will explore how the Xen Architecture addresses the needs of the Cloud in ways which facilitate security, throughput, and agility. It will also cover some of the hot new developments of the Xen Project.
Julien Grall, Citrix
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EmbeddedXEN is a particularly efficient virtualization framework tailored to ARM-based core embedded systems.
While security and OS isolation are key features of conventional virtualizuation frameworks, the main concerns for EmbeddedXEN are device heterogeneity and realtime aspects, which are particularly important in the embedded world.
EmbeddedXEN mainly relies on the original XEN architecture but with major differences in the way guest OS are handled: the hypervisor has been simplified, and only two guest OS (dom0 and domU) can run simultaneously; while dom0 is used to manage the native OS with drivers (original and backend splitted drivers), a paravirtualized OS (domU) can be cross-compiled on a different ARM device, and user applications can run seamlessly on the (virtualized) host device. Another important difference is that no user space tools are required to manage the VMs; the framework produces a compact single binary image containing both dom0 and domU guests, which can be easily deployed. The Xenbus architecture has been adapted to that context.
EmbeddedXEN therefore allows the porting of an OS and its applications from an ARM embedded device to last generation ARM hardware, such as HTC Smartphone for example.IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...
This document summarizes security vulnerabilities in the Xen hypervisor virtualization platform. It describes two attacks:
1) A denial of service attack where a malicious domain can pad a large file to its kernel image, consuming significant system resources during booting and preventing other domains from accessing resources.
2) An attack where an insider with dom0 privileges can use the "dump-core" command to take a memory snapshot of a target domain, allowing extraction of plaintext passwords and sensitive data from the domain's memory.
The document analyzes these issues and argues that Xen's architecture, with the dom0 control domain having elevated privileges, is the root cause of vulnerabilities. It suggests the privileges of dom0 should be reduced to
A Xen Case Study
The document discusses using virtualization with Xen in a real world environment. It describes how virtualization was used at Newtec to consolidate servers, test configurations, and build dynamic development environments. Some key benefits realized were reduced hardware costs through consolidation, the ability to test at large scale without dedicated hardware, and automating the deployment of virtual machines. It also discusses lessons learned around only virtualizing what is needed and ensuring simplicity to maximize availability.
Xen and the art of virtualization
Xen is a virtual machine monitor that allows multiple operating systems to run concurrently on a single physical machine. It uses paravirtualization rather than full virtualization to improve performance. Xen provides performance isolation between guest operating systems and can host different operating systems with only small modifications required. Evaluation shows Xen achieves near native performance for guest operating systems and provides strong performance isolation even under malicious workloads. Future work aims to improve memory performance and support additional guest operating systems like Windows.
Similar to Xen Directions HXEN (19)
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ELC2019: Static Partitioning Made Simple
Static partitioning is used to split an embedded system into multiple domains, each of them having access only to a portion of the hardware on the SoC. It is key to enable mixed-criticality scenarios, where a critical application, often based on a small RTOS, runs alongside a larger non-critical app, typically based on Linux. The two domains cannot interfere with each other.
This talk will explain how to use Xen for static partitioning. It will introduce dom0-less, a new Xen feature written for the purpose. Dom0-less allows multiple VMs to start at boot time directly from the Xen hypervisor, decreasing boot times drastically. It makes it very easy to partition the system without virtualization overhead. Dom0 becomes unnecessary.
This presentation will go into details on how to setup a Xen dom0-less system. It will show configuration examples and explain device assignment. The talk will discuss its implications for latency-sensitive and safety-critical environments.
XPDDS19: How TrenchBoot is Enabling Measured Launch for Open-Source Platform ...
XPDDS19: How TrenchBoot is Enabling Measured Launch for Open-Source Platform ...The Linux Foundation
Daniel Smith discusses TrenchBoot, a project aiming to establish a unified approach to harnessing boot integrity technologies across open source platforms. TrenchBoot will enable establishing hardware-rooted integrity during platform boot (first launch inspection), runtime (runtime inspection), and other states. For runtime inspection, TrenchBoot will develop a way to securely re-establish the integrity of Xen at any time without rebooting by dynamically launching an integrity kernel to inspect and verify Xen. The talk outlines the initial and future work of TrenchBoot to integrate these capabilities with Linux, Xen and other open source projects.XPDDS19 Keynote: Xen in Automotive - Artem Mygaiev, Director, Technology Solu...
XPDDS19 Keynote: Xen in Automotive - Artem Mygaiev, Director, Technology Solu...The Linux Foundation
Artem will briefly cover what has been done since the first talk on Xen in Automotive domain back in 2013, what is going on now and what is still missing for broad adaptation of Xen in vehicles. The following topics will be covered:
Embedded/automotive features of Xen
Collaboration with AGL and GENIVI organizations for standardization
Efforts on Functional Safety compliance
Artem will also go over typical automotive use scenarios for Xen which may not be the same as generic computing use of hypervisor.XPDDS19 Keynote: Xen Project Weather Report 2019 - Lars Kurth, Director of Op...
XPDDS19 Keynote: Xen Project Weather Report 2019 - Lars Kurth, Director of Op...The Linux Foundation
In this keynote talk, we will give an overview of the state of the Xen Project, trends that impact the project, see whether challenges that surfaced last year have been addressed and how we did it, and highlight new challenges and solutions for the coming year.XPDDS19 Keynote: Unikraft Weather Report
In recent years unikernels have shown immense performance potential (e.g., boot times of only a few ms, image sizes of only hundreds of KBs).The fundamental drawback of unikernels is that they require that applications be manually ported to the underlying minimalistic OS, needing both expert work and often considerable amount of time.
The Unikraft project provides a unikernel code base and build system that significantly simplifies the building of unikernels. In addition to support for a number CPU architectures, languages and frameworks, Unikraft provides debugging and tracing features that are generally sorely missing from unikernel projects. In this talk we will talk about these features, show a set of preliminary performance numbers, and provide a roadmap for the project's future.
XPDDS19 Keynote: Secret-free Hypervisor: Now and Future - Wei Liu, Software E...
XPDDS19 Keynote: Secret-free Hypervisor: Now and Future - Wei Liu, Software E...The Linux Foundation
The idea of making Xen secret-free has been floating since Spectre and Meltdown came into light. In this talk we will discuss what is being done and what needs to be done next.XPDDS19 Keynote: Xen Dom0-less - Stefano Stabellini, Principal Engineer, Xilinx
This talk will introduce Dom0-less: a new way of using Xen to build mixed-criticality solutions. Dom0-less is a Xen feature that adds a novel approach to static partitioning based on virtualization. It allows multiple domains to start at boot time directly from the Xen hypervisor, decreasing boot times dramatically. Xen userspace tools, such as xl and libvirt, become optional.
Dom0-less extends the existing device tree based Xen boot protocol to cover information required by additional domains. Binaries, such as kernels and ramdisks, are loaded by the bootloader (u-boot) and advertised to Xen via new device tree bindings.
The audience will learn how to use Dom0-less to partition the system. Uboot and device tree configuration details will be explained to enable the audience to get the most out of this feature. The talk will include a status update and details on future plans.
XPDDS19 Keynote: Patch Review for Non-maintainers - George Dunlap, Citrix Sys...
XPDDS19 Keynote: Patch Review for Non-maintainers - George Dunlap, Citrix Sys...The Linux Foundation
As the number of contributions grow, reviewer bandwidth becomes a bottleneck; and maintainers are always asking for more help. However, ultimately maintainers must at least Ack every patch that goes in; so if you're not a maintainer, how can you contribute? Why should anyone care about your opinion?
This talk will try to lay out some advice and guidelines for non-maintainers, for how they can do code review in a way which will effectively reduce the load on maintainers when they do come to review a patch.XPDDS19: Memories of a VM Funk - Mihai Donțu, Bitdefender
This talk is a follow-up to our Summit 2017 presentation in which we covered our plans for Intel VMFUNC and #VE, as well as related use-cases. This year, we will provide a report on what we have accomplished in Xen 4.12, and what remains to be addressed. We will also give a brief status update of VMI on AMD hardware. The session will end with some real-world numbers of the Hypervisor Introspection solution running on Citrix Hypervisor 8.0 with #VE enabled.
OSSJP/ALS19: The Road to Safety Certification: Overcoming Community Challeng...
Safety certification is one of the essential requirements for software to be used in highly regulated industries. Besides technical and compliance issues (such as ISO 26262 vs IEC 611508) transitioning an existing project to become more easily safety certifiable requires significant changes to development practices within an open source project.
In this session, we will lay out some challenges of making safety certification achievable in open source and the Xen Project. We will outline the process the Xen Project has followed thus far and highlight lessons learned along the way. The talk will primarily focus on necessary process, tooling changes and community challenges that can prevent progress. We will be offering an in-depth review of how Xen Project is approaching this challenging goal and try to derive lessons for other projects and contributors.
OSSJP/ALS19: The Road to Safety Certification: How the Xen Project is Making...
This document summarizes a discussion around enabling functional safety certification for the Xen open source hypervisor project. Key points discussed include:
- Establishing a split development model with open and closed parts to balance community needs and safety requirements.
- Developing reference implementations and stacks supported by multiple vendors to demonstrate safety certification feasibility.
- Creating plans and processes around requirements, documentation, verification testing, and tooling integration to begin filling gaps for certification.
- Addressing challenges around funding, resources, expertise, and maintaining contributions to ensure any initial work is sustainable long-term.
- Taking an iterative, agile approach to make early progress while further securing necessary funding and support from interested parties.
XPDDS19: Speculative Sidechannels and Mitigations - Andrew Cooper, Citrix
2018 saw fundamental shifts in security boundaries which were previously taken for granted. A lot of work has been done in the past 2 years, and largely in secret under embargo, but there is plenty more work to be done to strengthen the existing mitigations and to try to recover some performance without reopening security holes.
This talk will look at speculative execution sidechannels, the work which has already been done to mitigate the security holes, and future work which hopes to bring some improvements.
XPDDS19: Keeping Coherency on Arm: Reborn - Julien Grall, Arm ltd
The Arm architecture provides a set of guidelines that any software should abide by when accessing the memory with MMU off and update page-tables. Failing to do so may result in getting TLB conflicts or breaking coherency.
In a previous talk ("Keeping coherency on Arm"), we focused on updating safely the stage-2 (aka P2M) page-tables. This talk will focus on the boot code and Xen memory management.
During this session, we will introduce some of the guidelines and when they should be used. We will also discuss how Xen boot sequence needs to be reworked to avoid breaking the guidelines.
XPDDS19: QEMU PV Backend 'qdevification'... What Does it Mean? - Paul Durrant...
XPDDS19: QEMU PV Backend 'qdevification'... What Does it Mean? - Paul Durrant...The Linux Foundation
For many years the QEMU codebase has contained PV backends for Xen guests, giving them paravirtual access to storage, network, keyboard, mouse, etc. however these backends have not been configurable as QEMU devices as their implementation did not fully adhere to the QEMU Object Model (QOM).
Particularly the PV storage backend not using proper QOM devices, or qdevs, meant that the QEMU block layer needed to maintain legacy code that was cluttering up the source. This was causing push-back from the maintainers who did not want to accept any patches relating to that Xen backend until it was 'qdevified'.
In this talk, I'll explain the modifications I made to QEMU to achieve 'qdevification' of the PV storage backend, how compatibility with the libxl toolstack was maintained, and what the next steps in both QEMU and libxl development should be.XPDDS19: Status of PCI Emulation in Xen - Roger Pau Monné, Citrix Systems R&D
PCI is a local computer bus for attaching hardware devices in a computer, and is the main peripheral bus on modern x86 systems. As such, having a proper way to emulate it is crucial for Xen to be able to expose both fully emulated devices or passthrough devices to guests.
This talk will focus on the current status of PCI emulation in Xen, how and where it is used, what are its main limitations and future plans to improve it in order to be more robust and modular.
XPDDS19: [ARM] OP-TEE Mediator in Xen - Volodymyr Babchuk, EPAM Systems
Volodymyr will speak about TEE mediators. This is a new feature in Xen which allows multiple virtual machines to interact with Trusted Execution Environment available on platform. He developed mediator for one of TEEs, namely OP-TEE.
He will give background information on why TEE is needed at all and share some implementation details.
XPDDS19: Bringing Xen to the Masses: The Story of Building a Community-driven...
XPDDS19: Bringing Xen to the Masses: The Story of Building a Community-driven...The Linux Foundation
Xen is a very powerful hypervisor with a talented and diverse developers community. Despite the fact it's almost everywhere (from the Cloud to the embedded world), it can be difficult to set up and manage as a system administrator. General purpose distros have Xen packages, but that's just a start in your Xen journey: you need some tooling and knowledge to have a working and scalable platform.
XCP-ng was built to overcome those issues: by bringing Xen to the masses with a fully turnkey distro with Xen as its core. It's the logical sequel to the XCP project, with a community focus from the start. We'll see how it happened, what we did, and what's next. Finally, we'll see the impact of XCP-ng on the Xen Project.XPDDS19: Will Robots Automate Your Job Away? Streamlining Xen Project Contrib...
XPDDS19: Will Robots Automate Your Job Away? Streamlining Xen Project Contrib...The Linux Foundation
Doug has long advocated for more CI/CD (Continuous Integration / Continuous Delivery) processes to be adopted by the Xen Project from the use of Travis CI and now GitLab CI. This talk aims to propose ideas for building upon the existing process and transforming the development process to provide users a higher quality with each release by the Xen Project.XPDDS19: Client Virtualization Toolstack in Go - Nick Rosbrook & Brendan Kerr...
XPDDS19: Client Virtualization Toolstack in Go - Nick Rosbrook & Brendan Kerr...The Linux Foundation
High level toolstacks for server and cloud virtualization are very mature with large communities using and supporting them. Client virtualization is a much more niche community with unique requirements when compared to those found in the server space. In this talk, we’ll introduce a client virtualization toolstack for Xen (redctl) that we are using in Redfield, a new open-source client virtualization distribution that builds upon the work done by the greater virtualization and Linux communities. We will present a case for maturing libxl’s Go bindings and discuss what advantages Go has to offer for high level toolstacks, including in the server space.XPDDS19: Core Scheduling in Xen - Jürgen Groß, SUSE
Today Xen is scheduling guest virtual cpus on all available physical cpus independently from each other. Recent security issues on modern processors (e.g. L1TF) require to turn off hyperthreading for best security in order to avoid leaking information from one hyperthread to the other. One way to avoid having to turn off hyperthreading is to only ever schedule virtual cpus of the same guest on one physical core at the same time. This is called core scheduling.
This presentation shows results from the effort to implement core scheduling in the Xen hypervisor. The basic modifications in Xen are presented and performance numbers with core scheduling active are shown.
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XPDDS19 Keynote: Xen in Automotive - Artem Mygaiev, Director, Technology Solu...
XPDDS19 Keynote: Xen in Automotive - Artem Mygaiev, Director, Technology Solu...
XPDDS19 Keynote: Xen Project Weather Report 2019 - Lars Kurth, Director of Op...
XPDDS19 Keynote: Xen Project Weather Report 2019 - Lars Kurth, Director of Op...
XPDDS19 Keynote: Secret-free Hypervisor: Now and Future - Wei Liu, Software E...
XPDDS19 Keynote: Secret-free Hypervisor: Now and Future - Wei Liu, Software E...
XPDDS19 Keynote: Xen Dom0-less - Stefano Stabellini, Principal Engineer, Xilinx
XPDDS19 Keynote: Xen Dom0-less - Stefano Stabellini, Principal Engineer, Xilinx
XPDDS19 Keynote: Patch Review for Non-maintainers - George Dunlap, Citrix Sys...
XPDDS19 Keynote: Patch Review for Non-maintainers - George Dunlap, Citrix Sys...
XPDDS19: Memories of a VM Funk - Mihai Donțu, Bitdefender
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OSSJP/ALS19: The Road to Safety Certification: Overcoming Community Challeng...
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OSSJP/ALS19: The Road to Safety Certification: How the Xen Project is Making...
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XPDDS19: Speculative Sidechannels and Mitigations - Andrew Cooper, Citrix
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XPDDS19: Keeping Coherency on Arm: Reborn - Julien Grall, Arm ltd
XPDDS19: Keeping Coherency on Arm: Reborn - Julien Grall, Arm ltd
XPDDS19: QEMU PV Backend 'qdevification'... What Does it Mean? - Paul Durrant...
XPDDS19: QEMU PV Backend 'qdevification'... What Does it Mean? - Paul Durrant...
XPDDS19: Status of PCI Emulation in Xen - Roger Pau Monné, Citrix Systems R&D
XPDDS19: Status of PCI Emulation in Xen - Roger Pau Monné, Citrix Systems R&D
XPDDS19: [ARM] OP-TEE Mediator in Xen - Volodymyr Babchuk, EPAM Systems
XPDDS19: [ARM] OP-TEE Mediator in Xen - Volodymyr Babchuk, EPAM Systems
XPDDS19: Bringing Xen to the Masses: The Story of Building a Community-driven...
XPDDS19: Bringing Xen to the Masses: The Story of Building a Community-driven...
XPDDS19: Will Robots Automate Your Job Away? Streamlining Xen Project Contrib...
XPDDS19: Will Robots Automate Your Job Away? Streamlining Xen Project Contrib...
XPDDS19: Client Virtualization Toolstack in Go - Nick Rosbrook & Brendan Kerr...
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XPDDS19: Core Scheduling in Xen - Jürgen Groß, SUSE
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