[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

[zipb]

I am sorry, but I lost track of the goal of all this. If we enable vt-d, Thunderbolt works better? I'm still on Mojave and would appreciate tb networking. What are the exact prerequisites? Special Bios? Flashed TB? Windows will still work?

 

[Inqnuam]

I am sorry, but I lost track of the goal of all this. If we enable vt-d, Thunderbolt works better? I'm still on Mojave and would appreciate tb networking. What are the exact prerequisites? Special Bios? Flashed TB? Windows will still work?

Latest OpenCore and VT-d enabled in BIOS then you have a working TB Ethernet on Mojave and Catalina

 

[CaseySJ]

I am sorry, but I lost track of the goal of all this. If we enable vt-d, Thunderbolt works better? I'm still on Mojave and would appreciate tb networking. What are the exact prerequisites? Special Bios? Flashed TB? Windows will still work?

Please see this post:

[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

Does anyone have an SSDT for the RX580. On mine when playing music or videos the sound plays then stop for a quick millisecond and plays again. This happens every 10 to 20 seconds of the song/video. The fact that this is also happening in windows leads me to believe the RX580 needs patching or...

www.tonymacx86.com

TB Networking (i.e. connecting two Macs over a single Thunderbolt cable and using Thunderbolt NAS drives), however, requires flashing the Titan Ridge firmware. With flashed firmware, Windows will still run, but Thunderbolt behavior in Windows will be somewhat impaired. System may need to be warm booted before TB devices show up in Windows (if they do).

 

[taylorsyn]

Interesting! Is there a device called DMAC in IOReg, just below the CPU names (CP01, CP02, ...)? It may also be insightful to look at your board's DSDT to see if "DMAC" appears.

Yes I have DMAC, I found @metacollin great post talking about BIOS patches using UEFI Patcher here. (Which seems like a great prelude to building a proper ECC workstation board) I ran UEFI Patcher with BIOS and it found TWO patches which is why I think I have been having issues with OpenCore needing "EnableWriteUnProtector" in booter quirks. Will be patching and updating my OC config and retrying your method. Will update later today

 

[dehjomz]

For those curious about VT-D, it should be noted that enabling VT-d on some BIOSes will enable Kernel DMA protection for thunderbolt in windows. You can view this by using the Thunderbolt Control Center, and going to 'About.' This allegedly will help protect against thunderbolt DMA attacks like thunderspy.

For z490 Vision D, the F5 Bios doesn't have kernel dma protection, but the F20 BIOS does. On Z590 Vision D, none of the publicly available beta bioses have kernel dma protection, but there are some unreleased beta bioses that do.

 

[CaseySJ]

Yes I have DMAC, I found @metacollin great post talking about BIOS patches using UEFI Patcher here. (Which seems like a great prelude to building a proper ECC workstation board) I ran UEFI Patcher with BIOS and it found TWO patches which is why I think I have been having issues with OpenCore needing "EnableWriteUnProtector" in booter quirks. Will be patching and updating my OC config and retrying your method. Will update later today

Is there a DMAC device defined in your DSDT? Please see post below that shows my Asus X99 Deluxe II with native DMAC.

[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

Well, what do you know? My Asus X99 Deluxe II with Big Sur 11.5 Beta 5 works perfectly! AppleVTD enabled DMAC 4 DIMMs (8GB x 4 = 32GB) -- 8 total slots Fenvi FV-T919 --> no issues WiFi okay Bluetooth okay Two on-board Ethernet ports --> no issues i211 --> SmallTreeIntel82576.kext i218V2 -->...

www.tonymacx86.com

 

[CaseySJ]

For those curious about VT-D, it should be noted that enabling VT-d on some BIOSes will enable Kernel DMA protection for thunderbolt in windows. You can view this by using the Thunderbolt Control Center, and going to 'About.' This allegedly will help protect against thunderbolt DMA attacks like thunderspy.

For z490 Vision D, the F5 Bios doesn't have kernel dma protection, but the F20 BIOS does. On Z590 Vision D, none of the publicly available beta bioses have kernel dma protection, but there are some unreleased beta bioses that do.

Have you tried BIOS F20 on the Z490 Vision D with AppleVTD enabled and more than 16GB memory running Big Sur?

 

[zipb]

And flashing my built in TB still means futzing with your mobo, a clip and a RPi?

 

[CaseySJ]

And flashing my built in TB still means futzing with your mobo, a clip and a RPi?

Of course it does.

 

[zipb]

Right. I'll pass then.