ddm <hope2h...@163.com> 于2019年8月5日周一 下午1:20写道： > Hi, > > As i know, KVM is based on passthrough host cpu to implement > full-virtualiztion, > if host cpu doesn't support this feature, it's impossible to turn on this > feature by KVM. > Wheher there are another ways in QEMU to emulate this feature，such as > emulate it based on pure software, not rely on hardware. > > IIUC there is no APICv emulate.
Thanks, Li Qiang > Thanks! > > > At 2019-08-05 12:42:55, "Li Qiang" <liq...@gmail.com> wrote: > > > > ddm <hope2h...@163.com> 于2019年8月5日周一 上午11:55写道： > >> Hi guys, >> >> >> I have tried via modprobe kvmintel enable_apicv=Y to adjust KVM >> parameter, but it doesn't effect, and >> cat /sys/module/kvm_intel/parameters/enable_apicv always return "N". >> I don't know how to configure KVM or QEMU to support APIC virtualizaion >> feature? >> >> > AFAICT APICv is hardware feature, but I still don't know accurately after > which CPU support it. > You may refer the code about 'enable_apicv' related code in kvm to see how > to detect this capability. > > Thanks, > Li Qiang > > >> >> My host infos are as follows: >> Architecture: x86_64 >> CPU op-mode(s): 32-bit, 64-bit >> Byte Order: Little Endian >> CPU(s): 1 >> On-line CPU(s) list: 0 >> Thread(s) per core: 1 >> Core(s) per socket: 1 >> Socket(s): 1 >> NUMA node(s): 1 >> Vendor ID: GenuineIntel >> CPU family: 6 >> Model: 142 >> Model name: Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz >> Stepping: 10 >> CPU MHz: 2112.001 >> BogoMIPS: 4224.00 >> Virtualization: VT-x >> Hypervisor vendor: VMware >> Virtualization type: full >> L1d cache: 32K >> L1i cache: 32K >> L2 cache: 256K >> L3 cache: 8192K >> NUMA node0 CPU(s): 0 >> Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr >> pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb >> rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc >> cpuid pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe >> popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm >> 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb stibp >> tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 >> invpcid rtm rdseed adx smap xsaveopt arat flush_l1d arch_capabilities >> >> >> Could you tell me how to configure it? >> >> >> Thanks! >> >> > > >
