kvm-intel.ko unable to create /dev/kvm

kvm-intel.ko unable to create /dev/kvm

[gerryw]

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Hello All,

I'm having some trouble with kvm-60. I'm trying to run it from a flash 
(ram disk). When I load kvm-intel.ko, it doesn't create the device file 
/dev/kvm. Can anyone give me a clue to why this might be so. Is the ram 
disk the problem?

Thanks,
-G






 

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Re: kvm-intel.ko unable to create /dev/kvm

[Michael Tokarev]

gerryw@compvia.com wrote:
> 
> Hello All,
> 
> I'm having some trouble with kvm-60. I'm trying to run it from a flash
> (ram disk). When I load kvm-intel.ko, it doesn't create the device file
> /dev/kvm. Can anyone give me a clue to why this might be so. Is the ram
> disk the problem?

a kernel module does not create any device files.
On a modern distribution, udev is usually responsible for creating
device nodes based on which actual devices are present on the system
and which drivers are loaded.

Sometimes a distribution does not include udev (or it's optional) -
in this case static /dev layout is used, that is, a fixed set of
device nodes are created during system install.  In this case you
have to create missing nodes manually.

For /dev/kvm, look at /sys/devices/virtual/misc/kvm/dev - that's
a file with major and minor numbers for the device node.  Create
it like this:

 mknod /dev/kvm c major minor

(where major and minor values are taken from the above mentioned
file).

But kvm support should be here in the first place to start with.
If /sys/devices/virtual/misc/kvm is not here, verify that the
module is actually loaded and found necessary hardware support.
Note that kvm may be disabled in BIOS for example.  Also try
never BIOS if it seems to be here but still doesn't work.

/mjt

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Re: kvm-intel.ko unable to create /dev/kvm

[gerryw]

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Hi,

Thanks for the speedy reply. I looked in all of the places you mentioned, 
but no file. Are the major/minor numbers static. If so, where can I find 
them?

Thanks,
-G






 

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Re: kvm-intel.ko unable to create /dev/kvm

[Avi Kivity]

gerryw@compvia.com wrote:
>
> Hi,
>
> Thanks for the speedy reply. I looked in all of the places you 
> mentioned, but no file. Are the major/minor numbers static. If so, 
> where can I find them?
>

http://www.lanana.org/docs/device-list/devices-2.6+.txt (char major 10, 
minor 232)

-- 
error compiling committee.c: too many arguments to function


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Re: kvm-intel.ko unable to create /dev/kvm

[gerryw]

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Hi,

That's the ticket.  Thank You!

-G






 

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