https://www.elevenforum.com/t/trying-to-passthru-my-rtx-2080-ti-from-freebsd-14-to-a-windows-11-vm-it-generates-a-resource-conflict-and-requires-additional-installation

Hello.

What I would like to understand is why,when I try to pass my RTX 2080 ti
from FreeBSD to Windows 11,it won't do it,causing the error 12. It says
that it generates a resource conflict and requires additional installation).

I'm trying to debug the error. Below you see the IOMMU group of my Nvidia
Geforce RTX 2080 ti passed in a Windows 11 / bhyve VM and of Windows 11
installed physically. I'm not able to understand if there are
inconsistencies.

Now,inside it I still see the error 12 :

*The device PCI\VEN_10DE&DEV_1E04&SUBSYS_250319DA&REV_A1\3&61aaa01&0&48
generates a resource conflict and requires additional installation.*

I have more than one GPU. I have 3 gpus.

The ones you see below :

root@marietto-133:/usr/ports/www/chromium # lspci

00:00.0 Host bridge: Intel Corporation 8th/9th Gen Core 8-core Desktop
Processor Host Bridge/DRAM Registers [Coffee Lake S] (rev 0d)

00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe
Controller (x16) (rev 0d)

00:01.1 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen
Core Processor PCIe Controller (x8) (rev 0d)

*00:02.0 Display controller: Intel Corporation CoffeeLake-S GT2 [UHD
Graphics 630] (rev 02)*

00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH
Thermal Controller (rev 10)

00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host
Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI
Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI
Controller (rev 10)
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port
#17 (rev f0)
00:1c.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port
#1 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port
#9 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Z390 Chipset LPC/eSPI Controller (rev
10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller: Intel Corporation Cannon Lake PCH SPI
Controller (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7)
I219-V (rev 10)







*01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX
1060 3GB] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GP106 High
Definition Audio Controller (rev a1) 02:00.0 VGA compatible controller:
NVIDIA Corporation TU102 [GeForce RTX 2080 Ti] (rev a1) 02:00.1 Audio
device: NVIDIA Corporation TU102 High Definition Audio Controller (rev a1)
02:00.2 USB controller: NVIDIA Corporation TU102 USB 3.1 Host Controller
(rev a1) 02:00.3 Serial bus controller: NVIDIA Corporation TU102 USB Type-C
UCSI Controller (rev a1)*

03:00.0 Non-Volatile memory controller: Micron/Crucial Technology P1 NVMe
PCIe SSD[Frampton2] (rev 03)

What I'm doing is to choose (from the BIOS) this gpu and I assign it to the
host :

*00:02.0 Display controller: Intel Corporation CoffeeLake-S GT2 [UHD
Graphics 630] (rev 02)*

at the same time,I reserve the RTX 2080 ti to a guest os (Linux or
Windows),by declaring this parameter inside the file /boot/loader.conf :

*pptdevs="2/0/0 2/0/1 2/0/2 2/0/3"*

Take in consideration that it works inside the Linux vm,but NOT in the
Windows vm,because there are some kinds of conflicts between resources that
I need to understand.

I ran msinfo32 and then I checked the resource sharing and conflicts tab to
see which devices are conflicting with each other and I found something
really interesting :

[image: Istantanea_2024-05-09_17-39-55.png]
and :

[image: Istantanea_2024-05-09_17-56-58.png]
I'm not a developer,but I suspect that a patch is needed for bhyve. Windows
needs that ACPI is enabled in bhyve,because I have disabled it between the
bhyve parameters and this is what happened :

[image: Istantanea_2024-05-09_18-06-03.png]
I tried to disable it in Windows,but every time Windows restarts,it is
restored.

The other option would be to develop a patch for bhyve that fix the
conflicts that are shown by Windows ? Maybe bhyve offers a not complete
ACPI feature that should be improved ?

Please share your opinions.

-- 
Mario.