Virtual Frame Buffer for PV Xen Markus Armbruster, 2006 - PowerPoint PPT Presentation

Aug 17, 2023 •327 likes •425 views

Virtual Frame Buffer for PV Xen Markus Armbruster, 2006 armbru@redhat.com Red Hat GmbH Why and Who Why? Want a graphical console! Just like a real machine, just like FV Whodunnit? Anthony Liguori Design and initial implementation

Virtual Frame Buffer for PV Xen Markus Armbruster, 2006 armbru@redhat.com Red Hat GmbH
Why and Who Why? Want a graphical console! ☞ Just like a real machine, just like FV Whodunnit? ● Anthony Liguori Design and initial implementation ● Markus Armbruster & Jeremy Katz Flesh out, fix, extend ● The Xen Community
Architecture Similar to common split driver architecture: ● Frontend in domU: xenfb and xenkbd kernel modules ● Backend in dom0: user space VNC server ● Communicate through shared memory page and event channel shared frame buffer ● Forward compatible protocol
Shared Page & Event Channel One page for xenfb and xenkbd each, with:  Device information  Input event ring  Output event ring  Event notification on ring change
Xenkbd Events Input:  Pointer motion  Button down/up  Key down/up Output:  None defined yet Forward compatibility:  Can safely ignore unknown input events  Generate only requested output events
Xenfb Events Input:  Request to signal framebuffer update Output:  Signal framebuffer update Forward compatibility:  Can safely ignore unknown input events  Generate only requested output events
Future Work  Absolute pointer  Shadow translate mode guests  International keyboards  Dynamic resolution  Multiple frame buffers per guest  Share backend with FV  Save/Restore and Migrate
Resources  Design notes http://wiki.xensource.com/xenwiki/VirtualFramebuffer (somewhat dated)  Discussion http://lists.xensource.com/xen-devel

Download Presentation

Download Policy: The content available on the website is offered to you 'AS IS' for your personal information and use only. It cannot be commercialized, licensed, or distributed on other websites without prior consent from the author. To download a presentation, simply click this link. If you encounter any difficulties during the download process, it's possible that the publisher has removed the file from their server.

Recommend

The Xen Para-virtual Frame Buffer Markus Armbruster, 2007 armbru@redhat.com Red Hat GmbH What,

The Xen Para-virtual Frame Buffer Markus Armbruster, 2007 armbru@redhat.com Red Hat GmbH What, Why and Who What? A para-virtual driver for a virtual frame buffer device Why? Want a graphical console Just like a real machine, just like FV

273 views • 12 slides

CSE 120 Cache to map virtual page numbers to page frame Associative memory: HW looks up in all

Translation Lookaside Buffer (TLB) Implemented in Hardware CSE 120 Cache to map virtual page numbers to page frame Associative memory: HW looks up in all cache entries simultaneously Usually not big: 64-128 entries TLB entry: page

387 views • 7 slides

Guess What? Caching! Translation-Lookaside Buffer (TLB) stores for future use a successful

Guess What? Caching! Translation-Lookaside Buffer (TLB) stores for future use a successful translation between a Speeding Up Virtual Page Number (VPN) and a Physical Frame Number (PFN) Address Translation on a TLB hit, translation is achieved

387 views • 4 slides

Rasterization Rasterization Blending Blending Frame buffer Simple color model: R, G,

Rasterization Rasterization Blending Blending Frame buffer Simple color model: R, G, B; 8 bits each -channel A, another 8 bits Alpha determines opacity, pixel-by-pixel = 1: opaque = 0: transparent Blend

336 views • 12 slides

1 Virtual Channel Connection Uses Advantages of Virtual Paths (VP) & Virtual Channels (VC)

Chapter 11. ATM and Frame Relay ATM: Cell Switching ATM: a method of packet switching Overview of ATM A virtual circuit packet switching technique with QoS Protocol Architecture guarantee. Used in both WAN and LAN settings

64 views • 5 slides

Exploring the Effects of Image Persistence in Low Frame Rate Virtual Environments Regis Kopper

Exploring the Effects of Image Persistence in Low Frame Rate Virtual Environments Regis Kopper David J. Zielinski Hrishikesh M. Rao Marc A. Sommer Duke immersive Virtual Environment Duke immersive Virtual Environment Dept. of Biomedical

193 views • 17 slides

CS488 Polygon Filling, Point and Line Clipping Luc R ENAMBOT 1 Last time How line segments

CS488 Polygon Filling, Point and Line Clipping Luc R ENAMBOT 1 Last time How line segments are drawn into the frame buffer Began to talk about how polygons are filled in the frame buffer. Today: more about filling polygons and

1.04k views • 31 slides

Frame Relay Bigger, Longer, Uncut 2005/03/11 (C) Herbert Haas What is Frame Relay?

Frame Relay Bigger, Longer, Uncut 2005/03/11 (C) Herbert Haas What is Frame Relay? Connection-oriented packet switching (Virtual Circuit) WAN Technology Specifies User to Network Interface (UNI) Does not not specify network

787 views • 53 slides

Surfin ng the f frame n et A frame is a complex condition on its

1. Frames 2. Shifting 3. Metonymy 4. Word formation 5. Conclusion 2 Whats a frame? Surfin ng the f frame n et A frame is a complex condition on its potential

162 views • 13 slides

Buffer Manager Each relation is can be mapped onto many files (each file containing data from one

Buffer Management The database buffer is the mediator between the basic file system and the tuple-oriented file system. The buffer managers task is to make the pages addressable in main memory and to coordinate the writing of pages to disk

1.12k views • 8 slides

Introduction Buffer Overflows Buffer overflows were the most common form of security

Introduction Buffer Overflows Buffer overflows were the most common form of security vulnerability in the 90s. Buffer overflows dominate in the area of remote network penetration vulnerabilities. CS 465 They represent one of the

651 views • 4 slides

Buffer overflows (a security interlude) Address space layout the stack discipline + C's lack of

Buffer overflows (a security interlude) Address space layout the stack discipline + C's lack of bounds-checking HUGE PROBLEM x86-64 Linux Memory Layout ... ... 0x00007fffffffffff Stack not drawn to scale Caller Frame Extra Arguments

325 views • 16 slides

Buffer Overflows with Content 2 A Process Stack Buffer Overflow Common Techniques employed

1 Buffer Overflows with Content 2 A Process Stack Buffer Overflow Common Techniques employed in buffer overflow exploits to create backdoors Execution of additional network services via the INETD daemon The addition of new users

497 views • 30 slides

External buffer Raslan Darawsheh Mellanox External buffer First was introduced by Olivier

x External buffer Raslan Darawsheh Mellanox External buffer First was introduced by Olivier in his presentation in 2016. The support for External buffer has been there since DPDK 18.05 2 External buffer: Contd 3 External

544 views • 12 slides

Deck Deck Frame Frame DeckFrame Deck Frame is the utilization of VP Buildings

Deck Deck Frame Frame DeckFrame Deck Frame is the utilization of VP Buildings economical materials combined with conventional B deck materials To be utilized with any type lightweight non-metal roofing system

215 views • 17 slides

Buffer Overflow Attacks IA32 Linux Stack Higher Addresses Virtual Address Space Heap Data

Buffer Overflow Attacks IA32 Linux Stack Higher Addresses Virtual Address Space Heap Data Text Lower Addresses Stack and Base Pointers Stack is made up of stack frames Stack frames contain: parameters, local variables, return

604 views • 45 slides

Shadow of a Doubt: Testing for Divergences Between Software Versions Hristina Palikareva

Shadow of a Doubt: Testing for Divergences Between Software Versions Hristina Palikareva Tomasz Kuchta Cristian Cadar ICSE16, 20 th May 2016 This work is supported by EPSRC and Microsoft Research Motivation Software patches

724 views • 60 slides

CS412 Software Security Advanced Mitigations Mathias Payer EPFL, Spring 2019 Mathias Payer

CS412 Software Security Advanced Mitigations Mathias Payer EPFL, Spring 2019 Mathias Payer CS412 Software Security Model for Control-Flow Hijack Attacks Figure 1: Mathias Payer CS412 Software Security Advanced mitigations Stack integrity

298 views • 26 slides

Global illumination with many-light methods Jaroslav Kivnek Charles University, Prague

Global illumination with many-light methods Jaroslav Kivnek Charles University, Prague Review: Path integral formulation of light transport Veach , 1998 Zobrazovac rovnice v 3b form ulaci o ' i

736 views • 58 slides

Shadows (07) RNDr. Martin Madaras, PhD. martin.madaras@stuba.sk Why shadows? 2 Shadows in

Principles of Computer Graphics and Image Processing Shadows (07) RNDr. Martin Madaras, PhD. martin.madaras@stuba.sk Why shadows? 2 Shadows in global methods ray-tracing radiosity 3 Lights and shadows Two basic approaches Hard

692 views • 37 slides

Medicare Care Choices Model Cindy Massuda and Gigi Kuberski Implementation Project Officers

Medicare Care Choices Model Cindy Massuda and Gigi Kuberski Implementation Project Officers Model Purpose According to Medicare claims data, only 44 percent of Medicare patients use the hospice benefit at the end of life, and most use

382 views • 14 slides

Vectors, Signals & Shannons Information Theory A/Prof. Vaughan Clarkson 10 PROCEEDINGS OF

Vectors, Signals & Shannons Information Theory A/Prof. Vaughan Clarkson 10 PROCEEDINGS OF THE I.R.E. January through the attenuator to the receiver. In this manner, space-charge type illustrated in Fig. 5. The shape of this the gain

269 views • 10 slides

Learning Outcomes I can implement logic for any truth table by using Shannon's theorem to

2-4.1 2-4.2 Learning Outcomes I can implement logic for any truth table by using Shannon's theorem to decompose the function to create two smaller functions and a 2-to-1 mux Spiral 2-4 I can recursively apply Shannon's theorem k times

409 views • 8 slides

Notation Given a cryptosystem, denote Shannons Theory of Secrecy Systems M a message

Notation Given a cryptosystem, denote Shannons Theory of Secrecy Systems M a message (plaintext) C a ciphertext K a key E be the encryption function C = E K ( M ) D be the decryption function M = D K ( C ) For any key K , E K ( ) and D K (

157 views • 4 slides