Bug 282601

Summary:	qemu-0.10.5 needs kvm udev rule to set permissions
Product:	Gentoo Linux	Reporter:	David Williams <davidjw>
Component:	Current packages	Assignee:	Gentoo QEMU Project <qemu+disabled>
Status:	RESOLVED FIXED
Severity:	normal	CC:	jcdemay, jesse
Priority:	High
Version:	unspecified
Hardware:	AMD64
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description David Williams 2009-08-24 19:19:19 UTC

qemu doesn't include a udev rule to set the permissions on /dev/kvm. Without this you can't use qemu -enable-kvm unless you are root or you set the permissions manually.

Reproducible: Always




I put the udev rule file 65-kvm.rules from the kvm build into /etc/udev/rules.d/ and it works fine. Just for convenience the file contains:

KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"

Comment 1 kavol 2009-11-30 11:17:25 UTC

(In reply to comment #0)
> qemu doesn't include a udev rule to set the permissions on /dev/kvm. Without
> this you can't use qemu -enable-kvm unless you are root or you set the
> permissions manually.

I've just run into this too ... :-(

> I put the udev rule file 65-kvm.rules from the kvm build into
> /etc/udev/rules.d/ and it works fine. Just for convenience the file contains:
> 
> KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"

but the current qemu (0.11.0) nor any package that got installed along on my system does not create the "kvm" group, so the above rule is not enough

I've chosen to go with the "qemu" group, which got created, and adding the rule
KERNEL=="kvm", NAME="%k", GROUP="qemu", MODE="0660"
into 48-qemu.rules plus the user being in the qemu group works just fine for me

Comment 2 Jorge Manuel B. S. Vicetto (RETIRED) gentoo-dev

2010-06-10 20:06:30 UTC

Do you still have this issue with the latest qemu-kvm version in the tree?

Comment 3 Jonathan-Christofer Demay 2010-06-10 21:58:30 UTC

I don't know about the latest qemu-kvm in the tree, but the lastest qemu (which also provides kvm) still lacks this file.

Comment 4 David Williams 2010-06-11 07:40:32 UTC

qemu-kvm-0.12.4 contains a udev rule and works fine for me.

Comment 5 kavol 2011-02-12 15:57:15 UTC

(In reply to comment #2)
> Do you still have this issue with the latest qemu-kvm version in the tree?

um, should we read that as "'USE=kvm emerge qemu' is dead, long live 'emerge qemu-kvm'"?

I am a bit confused about relation of these two ...

Comment 6 Doug Goldstein (RETIRED) gentoo-dev

2012-12-04 22:40:44 UTC

(In reply to comment #5)
> (In reply to comment #2)
> > Do you still have this issue with the latest qemu-kvm version in the tree?
> 
> um, should we read that as "'USE=kvm emerge qemu' is dead, long live 'emerge
> qemu-kvm'"?
> 
> I am a bit confused about relation of these two ...

Everything is now all back in app-emulation/qemu so rejoice that the confusion is fixed.

udev rules are all in place and everything now works.