hi Alex， i finally fixed this problem. that's because my code lacks pci virtual channel support.
after i add drivers\pci\vc.c to support this , everythings runs ok. thanks a lot. 2017-03-13 10:29 GMT+08:00 rhett rhett <rhett.ker...@gmail.com>: > it's using qemu 1.2 , i tried the newest qemu , version 2.8 , the problem > remains. > > 2017-03-10 22:08 GMT+08:00 Alex Williamson <alex.william...@redhat.com>: > >> On Fri, 10 Mar 2017 10:42:28 +0800 >> rhett rhett <rhett.ker...@gmail.com> wrote: >> >> > sorry , update infomation right now >> > >> > >> > i installed centos7.3 at my 8 gpus machine yesterday, and i made a >> > successful passthrough, the vm guest os can use gpu with no problem. so >> i >> > think this is a software problem, i need to patch some patch. >> > >> > i also made a test in my 4 gpus machine without any software change, the >> > result is success. the 4 gpus are attached at pci root without pcie >> switch >> > , so , i think the software problem have some correlation with pcie >> switch . >> > >> > thank you Alex . >> > >> > [root@64 /data]# lspci|grep NV >> > 04:00.0 3D controller: NVIDIA Corporation Device 17fd (rev a1) >> >> Tesla M40 >> >> > 05:00.0 3D controller: NVIDIA Corporation Device 1b38 (rev a1) >> >> Tesla P40 >> >> > 08:00.0 3D controller: NVIDIA Corporation Device 1b38 (rev a1) >> > 09:00.0 3D controller: NVIDIA Corporation Device 1b38 (rev a1) >> > 85:00.0 3D controller: NVIDIA Corporation Device 1b38 (rev a1) >> > 86:00.0 3D controller: NVIDIA Corporation Device 17fd (rev a1) >> > 89:00.0 3D controller: NVIDIA Corporation Device 1b38 (rev a1) >> > 8a:00.0 3D controller: NVIDIA Corporation Device 1b38 (rev a1) >> >> Note that you have all of these in 3D mode, you may need to put these >> into VGA mode. NVIDIA provides tools to do this in the host. >> >> > [root@64 /data]# lspci -t >> > -+-[0000:ff]-+-08.0 >> > | +-08.2 >> > | +-08.3 >> > | +-09.0 >> >> [snip... not useful w/o info per devices] >> >> > and the xml >> > >> > <domain type='kvm'> >> > <name>win</name> >> > <uuid>a2021423-89d8-4a33-aaa5-07102ae7ad4e</uuid> >> > <memory unit='KiB'>8388608</memory> >> > <currentMemory unit='KiB'>8388608</currentMemory> >> > <vcpu placement='static' cpuset='0-8'>8</vcpu> >> > <sysinfo type='smbios'> >> > <system> >> > <entry name='serial'>21aa32e5-8233-40d4-b323-128824f6becf</entry> >> > <entry name='uuid'>a2021423-89d8-4a33-aaa5-07102ae7ad4e</entry> >> > </system> >> > </sysinfo> >> > <os> >> > <type arch='x86_64' machine='pc'>hvm</type> >> > <boot dev='hd'/> >> > <smbios mode='sysinfo'/> >> > </os> >> > <features> >> > <acpi/> >> > <apic/> >> > <pae/> >> > <hap/> >> > <hyperv> >> > <relaxed state='on'/> >> > </hyperv> >> > </features> >> > <cpu> >> > <topology sockets='2' cores='6' threads='2'/> >> > </cpu> >> > <clock offset='localtime'> >> > <timer name='pit' tickpolicy='delay'/> >> > <timer name='rtc' tickpolicy='catchup' track='guest'/> >> > <timer name='hpet' present='no'/> >> > </clock> >> > <on_poweroff>destroy</on_poweroff> >> > <on_reboot>restart</on_reboot> >> > <on_crash>restart</on_crash> >> > <devices> >> > <emulator>/usr/local/bin/qemu-system-x86_64</emulator> >> >> Running custom QEMU, what version is this? >> > >
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