** No longer affects: linux-hwe (Ubuntu Bionic) ** No longer affects: linux-hwe (Ubuntu Artful)
** No longer affects: linux-hwe (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1741655 Title: Regression: KVM no longer supports Intel CPUs without Virtual NMI Status in linux package in Ubuntu: In Progress Status in linux source package in Artful: In Progress Status in linux source package in Bionic: In Progress Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1741655/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
