Hi Paolo, > > > On 10/02/2017 10:31, Gonglei (Arei) wrote: > > But We tested the same cases on Xen platform and VMware, and > > the guest booted successfully. > > Were these two also tested with enlightenments enabled? TCG surely isn't. > About TCG, I just remove ' accel=kvm,' and 'hy_releaxed' from the below QEMU Command line, I thought the hyper-V enabled then. Sorry about that. But for Xen, we set 'viridian=1' which be thought the Hyper-V is enabled. For VMWare we also enabled the Hyper-V enlightenments. Thanks, -Gonglei > Paolo > > > Today I also tested on tcg, the guest also boots successfully. > > > > BTW, if we disable hyper-v, there isn't problem on boot for the case. > > > > QEMU command line (enable hyper-v with hv_relaxed): > > > > # ./qemu-system-x86_64 -name win2012 -machine accel=kvm,usb=off -cpu > qemu64,hv_relaxed -m 4001 -realtime mlock=off -smp > 68,sockets=1,cores=68,threads=1 \ > > -drive > file=/mnt/sdb/gonglei/win2012_r2_dc_64_raw,if=none,id=drive-ide0-0-0 > -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \ > > -boot menu=on -device piix3-usb-uhci,id=uhci -chardev > file,id=seabios,path=/home/seabios.log -device > isa-debugcon,iobase=0x402,chardev=seabios \ > > -monitor stdio -device cirrus-vga,id=video0,vgamem_mb=16 -vnc 0.0.0.0:10 > > > > So, I think it's possible a KVM bug on Hyper-V enlightenments support. > > > > Any help will be appreciated! > > > > CC'ing Paolo, Radim and Vadim.