AMD IOMMU Improvements & Apple M1 USB4/Thunderbolt DART Submitted For Linux 6.8

[phoronix]

Phoronix: AMD IOMMU Improvements & Apple M1 USB4/Thunderbolt DART Submitted For Linux 6.8

All of the Input-Output Memory Management Unit (IOMMU) subsystem updates were sent out this week for the in-development Linux 6.8 kernel...

https://www.phoronix.com/news/Linux-6.8-IOMMU

[klokik]

That's "just" IOMMU part, and not a working USB4 driver, right?

[Developer12]

That's "just" IOMMU part, and not a working USB4 driver, right?

Depends on what parts of USB4 you want to use. The ports already work for some uses but not others.

[klokik]

Depends on what parts of USB4 you want to use. The ports already work for some uses but not others.

USB4 NHI and PCIe tunneling obviously, USB XHCI stuff already works afaik, and DisplayPort alt mode is WIP too.

[Developer12]

USB4 NHI and PCIe tunneling obviously, USB XHCI stuff already works afaik, and DisplayPort alt mode is WIP too.

The PCIe controllers in the M1 physically can't run an eGPU.

[klokik]

There's plenty of other hardware that one may want to talk to. Say, PTP-capable Ethernet NIC, that doesn't need resizable bars, or nGnRE memory mapping (though, I hope they fixed it in M2+).