On Tue, Jan 26, 2021 at 06:18:47PM +0200, Yehezkel Bernat wrote: > On Tue, Jan 26, 2021 at 5:57 PM Mika Westerberg > <mika.westerberg@xxxxxxxxxxxxxxx> wrote: > > > > Recent Intel Thunderbolt firmware connection manager has support for > > another security level, SL5, that disables PCIe tunneling. This option > > can be turned on from the BIOS. > > > > When this is set the driver exposes a new security level "nopcie" to the > > userspace and hides the authorized attribute under connected devices. > > > > While there we also hide it when "dponly" security level is enabled > > since it is not really usable in that case anyway. > > > > Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > > --- > > Looks good to me, I'm just not sure I understand how this is different from > dponly mode. Is this just because it comes from the new _OSC? The firmware connection manager reports this new security level instead of dponly so we reflect that to the userspace, and while at it take advantage of the nopcie when USB4 _OSC disables PCIe tunneling so they both look the same from userspace perspective.
