X370 Taichi - iommu groups & bluetooth

[URL=][/URL]Hi all,

I am using the x370 Taichi in a unRaid build with a Windows 10 VM. As such, I would like to pass through certain hardware to the VM, but have had trouble with IOMMU groupings, even when enabling ACS override in Linux. The GPU has worked out fine, but the hardware below has given me trouble:

#1) is the Bluetooth totally integrated with the wifi? Ie, wifi must be enabled in the bios to have Bluetooth. Passing through the wifi device should also pass through Bluetooth? Anyone know what the Bluetooth hardware would display when viewing iommu groupings in Linux?

#2) I have a pcie USB plugged in that I would like to pass-through wholesale for PnP support and better compatibility. Unfortunately, no matter what I try with ACS enable / ACS override in Linux it remains grouped with a lot of other hardware including the Ethernet adapter and main USB which cannot be passed through. Anyone know how to get around this?

VIA controller is the hardware in question:


IOMMU group 12:     [1022:43b9] 03:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] Device 43b9 (rev 02)

[1022:43b5] 03:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] Device 43b5 (rev 02)

[1022:43b0] 03:00.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 43b0 (rev 02)

[1022:43b4] 04:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 300 Series Chipset PCIe Port (rev 02)

[1022:43b4] 04:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 300 Series Chipset PCIe Port (rev 02)

[1022:43b4] 04:03.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 300 Series Chipset PCIe Port (rev 02)

[1022:43b4] 04:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 300 Series Chipset PCIe Port (rev 02)

[1b21:0612] 06:00.0 SATA controller: ASMedia Technology Inc. ASM1062 Serial ATA Controller (rev 02)

[1b21:1184] 07:00.0 PCI bridge: ASMedia Technology Inc. Device 1184

[1b21:1184] 08:01.0 PCI bridge: ASMedia Technology Inc. Device 1184

[1b21:1184] 08:03.0 PCI bridge: ASMedia Technology Inc. Device 1184

[1b21:1184] 08:05.0 PCI bridge: ASMedia Technology Inc. Device 1184

[1b21:1184] 08:07.0 PCI bridge: ASMedia Technology Inc. Device 1184

[8086:24fb] 09:00.0 Network controller: Intel Corporation Dual Band Wireless-AC 3168NGW [Stone Peak] (rev 10)

[1106:3483] 0a:00.0 USB controller: VIA Technologies, Inc. VL805 USB 3.0 Host Controller (rev 01)

Edited by Cablecutter - 27 Feb 2018 at 10:50pm

The WiFi function is a PCIe v1.1 x1 device while the Bluetooth function is a USB v1.1 device.

It won't be listed there. From the Linux command prompt try

Also, may have found a workaround for the pcie iommu issue. This can be added to the link config to try to break out hardware:


append pcie_acs_override=id:8086:24fb,1106:34B3

Haven't tried it yet.

Cablecutter, I would encourage you to also open an AMD Support Ticket.  Enjoy, John.