Support LQ: Use code LQ3 and save $3 on Domain Registration
Go Back > Forums > Linux Forums > Linux - Virtualization and Cloud
User Name
Linux - Virtualization and Cloud This forum is for the discussion of all topics relating to Linux Virtualization and Linux Cloud platforms. Xen, KVM, OpenVZ, VirtualBox, VMware, Linux-VServer and all other Linux Virtualization platforms are welcome. OpenStack, CloudStack, ownCloud, Cloud Foundry, Eucalyptus, Nimbus, OpenNebula and all other Linux Cloud platforms are welcome. Note that questions relating solely to non-Linux OS's should be asked in the General forum.


Closed Thread
  Search this Thread
Old 10-07-2011, 03:37 AM   #1
LQ Newbie
Registered: Oct 2011
Posts: 2

Rep: Reputation: Disabled
Convert guest logical address to host physical address

Hi Everybody,
I need to get the task_struct's address of current process in a virtual machine monitor (such as Bitvisor).
Because of, in kernel mode, each process has an 8kb-sized (or 4kb) memory area which contains a stack starts at the beginning of the area (with highest address) and a struct named "thread_info" start at the end. An operation: esp & 0xffffe000 (esp & 0xfffff000 for 4Kb stack size) helps bring out the address of "thread_info". Since the task_struct's address can be calculated from the first field of "thread_info", I want to convert guest virtual address of thread_info struct to host physical address i hyoervisor level as below:
thread_info_guest_logical = VMCS.rsp & 0xffffe000
thread_info_host_logical =guest_logic_to_host_physic(....);
I need a proper C function such as guest_logic_to_host_physic in the Intel platform.

Anybody know about this or have suggestion ?

Many thanks.
Old 10-07-2011, 04:44 AM   #2
Registered: Sep 2003
Location: Bologna
Distribution: CentOS 6.5 OpenSuSE 12.3
Posts: 10,509

Rep: Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966Reputation: 1966
Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate of
1 members found this post helpful.

Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Convert guest logical address to host physical address hmd429 Linux - Kernel 0 10-07-2011 03:35 AM
how to translate virtual address to physical address in linux application saurin Programming 1 11-18-2009 10:05 PM
Examples about Logical,Linear and Physical address in Linux Memory Addressing muralis Linux - Kernel 5 08-04-2007 09:18 PM
how to find physical address of kernel virtual address kushneeraj Programming 0 10-20-2006 08:29 PM
API for mapping Physical Address to Virtual Address Lakshman_smt Linux - Software 2 10-15-2006 10:08 PM

All times are GMT -5. The time now is 10:22 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration