VT-x /AMD-V enabled

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xstation
Posts: 19
Joined: 27. Jun 2010, 22:36
Primary OS: Mac OS X Leopard
VBox Version: OSE other
Guest OSses: fedora 13 i686

VT-x /AMD-V enabled

Post by xstation »

according to the system display it says VT-x /AMD-V enabled I also know its enabled in my BIOS whowever when I type egrep '(vmx|svm)' --color=always /proc/cpuinfo and hit the return nothing comes back a whole of entries is supposed to come?

running fedora 13 as guest

xstation :D
Sasquatch
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Joined: 17. Mar 2008, 13:41
Primary OS: Debian other
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: Windows XP, Windows 7, Linux
Location: /dev/random

Re: VT-x /AMD-V enabled

Post by Sasquatch »

That CPU feature is not visible inside a VM, it's stripped. The OS doesn't need it, but the hypervisor running the OS does. In this case, VB needs VT-x for certain features, like 64 bit Guests and SMP, the Guest can do without and there is no benefit to have it there.
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Perryg
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Re: VT-x /AMD-V enabled

Post by Perryg »

I don't know about your command but mine tells me all about the hosts CPU inside the guest. (emulated info but still enough to tell if it is 64-bit)

Code: Select all

cat /proc/cpuinfo
Also the Fedora i686 (your profile) is the 32-bit version
Sasquatch
Volunteer
Posts: 17798
Joined: 17. Mar 2008, 13:41
Primary OS: Debian other
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: Windows XP, Windows 7, Linux
Location: /dev/random

Re: VT-x /AMD-V enabled

Post by Sasquatch »

His command searches if 'vmx' or 'svm' is in /proc/cpuinfo and outputs it, else show nothing. Since it doesn't show any output, the option isn't available. Makes sense, as stated above.
Read the Forum Posting Guide before opening a topic.
VirtualBox FAQ: Check this before asking questions.
Online User Manual: A must read if you want to know what we're talking about.
Howto: Install Linux Guest Additions
Howto: Use Shared Folders on Linux Guest
See the Tutorials and FAQ section at the top of the Forum for more guides.
Try searching the forums first with Google and add the site filter for this forum.
E.g. install guest additions site:forums.virtualbox.org

Retired from this Forum since OSSO introduction.
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