could not open /dev/kvm

Hi,

I'm running debian, installed kvm-18 from source, it installed fine...

I have an intel s5000pal motherboard with dual core xeon 64bit, virtualization enabled in my bios.

question 1 : is it normal i dont have this file : qemu-system-x86_64 , i only have the qemu file in my /bin

kvm and kvm_intel load fine with modprobe without errors or info in dmesg.

toranaga:/usr/src/kvm-18# lsmod
Module                  Size  Used by
kvm_intel              19852  0
kvm                    55128  1 kvm_intel

I did the following :

./qemu-img create -f qcow2 /virtual/test/vtest.img 5G works out fine...

./qemu . -hda /virtual/test/vtest.img -cdrom /virtual/win_corp.iso -boot d -m 512 -no-acpi

gives the following error : could not open /dev/kvm ...

in /proc/misc I found kvm as well :

62 kvm

but I dont have the /dev/kvm ... udev is installed though

can someone push me in the right direction please ? :)

Quoted 33 lines · Benjamin Budts

Hi,

I'm running debian, installed kvm-18 from source, it installed fine...

I have an intel s5000pal motherboard with dual core xeon 64bit, virtualization enabled in my bios.

question 1 : is it normal i dont have this file : qemu-system-x86_64 , i only have the qemu file in my /bin

kvm and kvm_intel load fine with modprobe without errors or info in dmesg.

toranaga:/usr/src/kvm-18# lsmod
Module                  Size  Used by
kvm_intel              19852  0
kvm                    55128  1 kvm_intel

I did the following :

./qemu-img create -f qcow2 /virtual/test/vtest.img 5G works out fine...

./qemu . -hda /virtual/test/vtest.img -cdrom /virtual/win_corp.iso -boot d -m 512 -no-acpi

gives the following error : could not open /dev/kvm ...

in /proc/misc I found kvm as well :

62 kvm

but I dont have the /dev/kvm ... udev is installed though

Quoted 4 lines

can someone push me in the right direction please ? :)

Is udevd alive? What does 'pgrep udevd' show?

Does udevtrigger help?

Hi,

I made an mknod myself now, did a cat of /sys/class/misc/kvm/dev 18 64

and did a
mknod /dev/kvm c 18 64

everything OK now

how come I dont have the /dev automatically ?

udevtrigger didn't help, pgrep udevd showed the pid of udevd... so it was alive and kicking.
even recompiled the whole thing with modules loaded and had the same problem. recreated it manually with mknod...

i'm running the latest stable debian etch kernel 2.6.20.7