bar 0 cant reserve error what should I do

Try unblacklisting amdgpu.
Better yet, gather all your posts all over other threads in this forum and put the information in them here, so all information and your current progress is visible to the people that are trying to help you.

Attach the VM configuration files, attach /etc/default/grub, attach /etc/modules, attach all files in directory /etc/modprobe.d/, what is the output of cat /proc/cmdline, show your IOMMU groups. Did you install vendor-reset? What motherboard and CPU are you using?
 
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