On Tue, 2013-07-23 at 15:31 -0600, Alex Williamson wrote: > On Tue, 2013-07-23 at 23:11 +0200, Massimiliano Adamo wrote: > > All, > > > > this is a bug with KVM, impacting (at least) all mainstream kernels that > > I tried so far: 3.2, 3.3, 3.4, 3.5, 3.8, 3.10 and 3.11 > > > > This is the link of the downstream bug: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1201092 > > > > - Firt of all I mention that this bug has been raised also for Fedora > > 18. > > Here is the link: https://bugzilla.redhat.com/show_bug.cgi?id=978608 > > > > - I am running Ubuntu Raring (with the kernel 3.8.0-27-generic), but > > I've also tried the mainstream kernel (without Ubuntu patches). > > > > - It happens with the following CPU: AMD E-350D > > > > - The kvm-ok executable says that the system is capable of running KVM, > > but it also says the it's disabled in the BIOS. > > > > - This is the out put of kvm-ok: > > # kvm-ok > > INFO: /dev/kvm does not exist > > HINT: sudo modprobe kvm_amd > > INFO: Your CPU supports KVM extensions > > INFO: KVM (svm) is disabled by your BIOS > > HINT: Enter your BIOS setup and enable Virtualization Technology (VT), > > and then hard poweroff/poweron your system > > KVM acceleration can NOT be used > > > > - This is what modprobe kvm-amd says: > > # modprobe kvm-amd > > ERROR: could not insert 'kvm_amd': Operation not supported > > root@yasna:~# dmesg |tail -n1 > > [ 2542.263745] kvm: disabled by bios > > > > - AMD-V extension on Virtualbox works correctly. > > Therefore the extension works properly but it's not recognized by KVM. > > What evidence do you have that Virtualbox is actually making use of > AMD-V? > Hi! That's a good point. Right now I can only say "it was selectable from the GUI". Therefore I just imagined "it's recognized". Now I try to see how to enable/check logs on Virtualbox and I'll get back to you with some feedback. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
