Public bug reported: Since upgrading from zesty to artful, I'm not longer able to use KVM on my server: # modprobe kvm-intel modprobe: ERROR: could not insert 'kvm_intel': Input/output error
Searching tells me this is caused by requiring Virtual NMI support[1] Running the script provided on the mailing list[1] to check virtualization features confirms my CPU (Xeon E5345) doesn't support Virtual NMIs: # python features.py | grep NMI NMI exiting yes Virtual NMIs no NMI-window exiting no Virtual NMI support was required in v4.12[1] and later reverted in v4.14.3[2] as some models (including Xeons) don't support it, even if others with the same core do. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1490803 [2] https://lkml.org/lkml/2017/8/7/231 [3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/arch/x86/kvm/vmx.c?h=linux-4.13.y&id=2c82878b0cb38fd516fd612c67852a6bbf282003 [4] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/arch/x86/kvm/vmx.c?h=linux-4.14.y&id=a77360e989f3dc06e4f177a0837d533d13a20d91 ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Tags: artful regression -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1741655 Title: Regression: KVM no longer supports Intel CPUs without Virtual NMI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1741655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
