QEMU GPU vfio-pci pass through

The system I'm using has a Ryzen 5 5600x, and two GPUs:

XFX Radeon RX 580
Sapphire Radeon R9 270X

I installed ArchLinux to use Qemu 9.2.0 and set up GPU passthrough with VFIO. While trying to get the passthrough working, I wanted to use R9 270x with Amiga side. The R9 270x video and audio components were tied up in IOMMU groups with other devices and QEMU didn't like that, so I then implemented ACS write patch to break out each device into its own group (using linux-zen kernel).

I never got it to work, so I swapped to using the RX580 (by changing the vfio ids in the grub line, running mkinitcpio again) and I was able to finally see the Amiga boot on it's own monitor, but now the mouse is frozen in the upper left. I tried the bochs-display to capture mouse events but there was an error ... can't reproduce it now but mouse still frozen. Will next try to pass through a specific mouse device on the command line.

@themamboman

Could you link me the model of yours (the one you are using) XFX Radeon RX 580
on Amazon so I understand how much I have to spend to get it and the exact model.

I recently got the rtx 4060
so I have rtx 2060 aside that I wanted to keep but I can sell it.
And eventually get the XFX Radeon RX 580.

Don't worry I'm not a person attached to money but I would like to understand which is the exact model to buy for qemu.

also I have the version of "Enhancer Software 2.2 for AmigaOS 4.1"
are the drivers included in that package ?

What I would like to use is AmigaOS 4.1 as a system and system acceleration for video and applications in general. (e-uae)
I am not interested in games that part is not important to me.


Thanks.

Today I backed up my system.
I had configured "VSphere" some time ago but I needed a second graphics card to use it and so I did my tests on this.
The discussion is broad and I will not dwell on this.

Also I was using the new:
https://www.techpowerup.com/download/nvidia-dlss-dll/
version (310.2) for DLSS.
( to enable dlss on some games (not multiplayer could lead to a "ban" because it is seen as tampering with the original game )

Now I use an ASUS TUF GAMING B550 with the Ryzen 5800 with the latest updated bios (3611).
I have 2 graphics cards 4060 and 2060

And I was doing some tests with some settings in the bios

PCI Subsystem
4g Decoding ENABLE
Resize BAR ENABLE
SR-IOV Support ENABLE

with these settings enabled in BIOS

4g Decoding ENABLE
Resize BAR ENABLE

the usb stick could not boot for the backup.
I have to see if this also happens with the "mouse".

Setting both to DISABLE the USB stick would boot normally again.

I don't know if you have these settings on your motherboard.

Let me know what card you use as soon as you can also a link on ebay to understand the model to buy.

Thanks.

Model number RX-580P8DFD6

https://www.amazon.com/XFX-Radeon-1386 ... -580P8DFD6/dp/B06Y66K3XD/

@themamboman

Thanks
it's around 100 euros used ( it's equivalent to a geforce1060 )
release date around 2017.
I'll post the video the model you indicated should be this one:

https://www.youtube.com/watch?v=C-loUscDLdw

at minute 2:17 you can see the label


note:
Keep me posted on your tests.
I think I'll buy it at the end of the month.

Thanks

here is the problem that occurs using:
PCI Subsystem
4g Decoding ENABLE
Resize BAR ENABLE

when I connect the USB stick to use in this case "TrueImage"

if I disable it:
PCI Subsystem
4g Decoding DISABLE
Resize BAR DISABLE

the problem does not occur and the boot proceeds without problems.






In subsequent versions Acronis has solved the problem starting from the "2022" version in my possession.
All versions are regularly purchased and therefore original.