Re: Thunderbolt(/USB4) followup & I'm happy to donate some hardware Re: Feature request: Use the PCIe devices on Thunderbolt (aka PCIe hotplug?)

2020-11-21 Thread Stefan Fritsch
FWIW, you absolutely need iommu suport in order to make thunderbolt even somewhat secure. So polishing and enabling iommu support for amd64 would have to come first. Am 20.11.20 um 19:01 schrieb Joseph Mayer: Kind bump on this thread. As for me I'd like to attach nvme(4) and maybe ethernet an

Re: Thunderbolt(/USB4) followup & I'm happy to donate some hardware Re: Feature request: Use the PCIe devices on Thunderbolt (aka PCIe hotplug?)

2020-11-20 Thread Joseph Mayer
Kind bump on this thread. As for me I'd like to attach nvme(4) and maybe ethernet and amdgpu(4) to the Thunderbolt-as-PCIe-bridge. Have a good wknd! Joseph ‐‐‐ Original Message ‐‐‐ On Monday, 26 October 2020 13:02, Joseph Mayer wrote: > (If this one belongs on misc@ please say.) > > H

Re: Thunderbolt(/USB4) followup & I'm happy to donate some hardware Re: Feature request: Use the PCIe devices on Thunderbolt (aka PCIe hotplug?)

2020-10-26 Thread Joseph Mayer
Hi Tom, I share your understanding that Thunderbolt has a lower security profile due to TB having dynamic memory addresses access while USB does not. I presume the engineering idea is that the IOMMU (when enabled and properly configured) should uphold memory safety. Remember though you have this

Thunderbolt(/USB4) followup & I'm happy to donate some hardware Re: Feature request: Use the PCIe devices on Thunderbolt (aka PCIe hotplug?)

2020-10-26 Thread Joseph Mayer
(If this one belongs on misc@ please say.) Hi tech@, If anyone is interested in implementing Thunderbolt support for OpenBSD, I'd like to donate some PCIe expansion Thunderbolt 3 enclosure and M.2 NVMe SSD Thunderbolt 3 enclosure as appropriate, if so please let me know. BSDCan 2020 presentation

Re: Thunderbolt(/USB4) followup & I'm happy to donate some hardware Re: Feature request: Use the PCIe devices on Thunderbolt (aka PCIe hotplug?)

2020-10-26 Thread Tom Smyth
Hi Joseph,All There are some PCI-E attack surfaces that might need to be considered... perhaps the availability of more devices with thunderbolt connections make PCI-E / DMA Attacks more viable and hence more prevalent. https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-934.pdf I did come across in