Hello, i wasted a lot of time to solve problem on plain KVM (not unraid) to use in Win10 guest, may it helps to you.
1) Nvidia GPU 1000+ is protected to use for passthrought, i have flashed bios on my GTX 1050Ti to use in KVM, but may it is not nessesary
2) My CPU AMD Ryzen and kernel parameters a little different:
GRUB_CMDLINE_LINUX_DEFAULT="splash=silent quiet elevator=deadline amd_iommu=force_isolation iommu=pt rd.driver.pre=vfio-pci vt.global_cursor_default=0 pcie_acs_override=downstream,multifunction"
3) This is part of my config for KVM. That worked for me:
...
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vpindex state='on'/>
<synic state='on'/>
<stimer state='on'/>
<vendor_id state='on' value='ahb6Wah2geeb'/>
<frequencies state='on'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
<vmport state='off'/>
<ioapic driver='kvm'/>
</features>
<cpu mode='host-passthrough' check='partial'>
<topology sockets='1' cores='6' threads='2'/>
<cache mode='passthrough'/>
<feature policy='require' name='topoext'/>
<feature policy='disable' name='hypervisor'/>
</cpu>
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</clock>
...
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x09' slot='0x00' function='0x0'/>
</source>
<rom file='/opt/windows/nvidia-patched.rom'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
</hostdev>
4) I have used
nvflash_linux
nvidia_vbios_vfio_patcher.py
to patch and flash my GPU
