2018-05-19 0:16 GMT+01:00 Dmitry Safonov 0x7f454c46@gmail.com:
2018-05-19 0:10 GMT+01:00 Dmitry Safonov 0x7f454c46@gmail.com:
Sure. I'm on Intel actually: cpu family : 6 model : 142 model name : Intel(R) Core(TM) i7-7600U CPU @ 2.80GHz
But I usually test kernels in VM. So, I use virt-manager as it's easier to manage multiple VMs. The thing is that I've chosen "Copy host CPU configuration" and for some reason, I don't quite follow virt-manager makes model "Opteron_G4". I'm on Fedora 27, virt-manager 1.4.3, qemu 2.9.1(qemu-2.9.1-2.fc26).
Hmm, the reason it chooses AMD emulation looks like a bug in virt-manager: When I try IvyBridge CPU, it gives the following error:
Error starting domain: the CPU is incompatible with host CPU: Host CPU does not provide required features: vme, x2apic, tsc-deadline, avx, f16c, rdrand
Which to my naive mind is by the reason that "tsc-deadline" is not written with a dash in cpuinfo: flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves ibpb ibrs stibp dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp
But that just my naive suppose.
Yeah, so they use cpuid there and I guess this one wasn't fixed for me: https://bugzilla.redhat.com/show_bug.cgi?id=1467599
Thanks, Dmitry