I got this bug on xenial 16.04.3 kernel 4.4.0-112-generic CPU model name: Intel(R) Xeon(R) CPU E3-1220 V2 @ 3.10GHz
$ sudo kvm-ok INFO: /dev/kvm exists KVM acceleration can be used $ uname -a Linux vmlab 4.4.0-112-generic #135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ dmesg|grep kvm [21488.889798] kvm: enabling virtualization on CPU3 failed [21488.889818] kvm: enabling virtualization on CPU1 failed [21488.889819] kvm: enabling virtualization on CPU2 failed [21488.889825] kvm: enabling virtualization on CPU0 failed [21489.575476] kvm: enabling virtualization on CPU1 failed [21489.575496] kvm: enabling virtualization on CPU0 failed [21489.575498] kvm: enabling virtualization on CPU2 failed [21489.575507] kvm: enabling virtualization on CPU3 failed [21497.617250] kvm: enabling virtualization on CPU0 failed [21497.617254] kvm: enabling virtualization on CPU2 failed [21497.617268] kvm: enabling virtualization on CPU3 failed [21497.617271] kvm: enabling virtualization on CPU1 failed [21498.314797] kvm: enabling virtualization on CPU3 failed [21498.314817] kvm: enabling virtualization on CPU1 failed [21498.314819] kvm: enabling virtualization on CPU2 failed [21498.314826] kvm: enabling virtualization on CPU0 failed Please advice if you need more info or test to be done. -- 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/1021271 Title: KVM "enabling virtualization on CPU0 failed" Status in linux package in Ubuntu: Invalid Status in qemu-kvm package in Ubuntu: Invalid Bug description: Background: Ubuntu 12.04 server, running amd64 version, AMD Athlon 64 X2 5000+ CPU. KVM worked fine on the same physical hardware when previously Debian Lenny. $ lsb_release -rd Description: Ubuntu 12.04 LTS Release: 12.04 $ $ apt-cache policy kvm kvm: Installed: 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu13 Candidate: 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu13 Version table: *** 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu13 0 500 http://gb.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages 100 /var/lib/dpkg/status $ Expected result: KVM should start and work without error, using hardware acceleration of CPU. Issue: When starting a VM, I get the following message: $ kvm -cdrom BT5R2-KDE-32.iso -m 256 -net nic -net user -vnc 127.0.0.1:2 failed to initialize KVM: Device or resource busy Back to tcg accelerator. And I them get the following line appear in the dmesg output: kvm: enabling virtualization on CPU0 failed The virtual host will still run, but with very poor performance, because it is not able to use hardware acceleration capabilities of host CPU. My account is in the KVM group (but I get the same symptoms even running as root): Code: $ ls -l /dev/kvm crw-rw---- 1 root kvm 10, 232 Jun 30 07:42 /dev/kvm $ whoami jason $ grep kvm /etc/group kvm:x:105:jason $ The KVM kernel modules are loaded: $ lsmod | grep kvm kvm_amd 55848 0 kvm 415459 1 kvm_amd $ Here is some background info on the host to hopefully help: Code: $ uname -a Linux cube 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux $ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 2 On-line CPU(s) list: 0,1 Thread(s) per core: 1 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1 Vendor ID: AuthenticAMD CPU family: 16 Model: 4 Stepping: 2 CPU MHz: 800.000 BogoMIPS: 4431.12 Virtualisation: AMD-V L1d cache: 64K L1i cache: 64K L2 cache: 512K NUMA node0 CPU(s): 0,1 $ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 4 model name : AMD Athlon(tm) 5000 Dual-Core Processor stepping : 2 microcode : 0x1000086 cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save bogomips : 4431.17 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate processor : 1 vendor_id : AuthenticAMD cpu family : 16 model : 4 model name : AMD Athlon(tm) 5000 Dual-Core Processor stepping : 2 microcode : 0x1000086 cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save bogomips : 4431.12 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate $ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1021271/+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
