[in plain text for the mailing lists] On Thu, Jan 24, 2019 at 08:10:47PM +0000, Austin.Bolen@xxxxxxxx wrote: > On 1/23/2019 12:46 PM, Keith Busch wrote: > > On Wed, Jan 23, 2019 at 06:20:57PM +0000, Alex_Gagniuc@xxxxxxxxxxxx<mailto:Alex_Gagniuc@xxxxxxxxxxxx> wrote: > > > <snip> > > Solution 1 is to say it's a spec violation, so ignore it. They'll change > the "logical OR" thing in the next PCIe spec, so we still will have to > worry about this. > > > > When's that changing? 5.0 is the next spec, and it still says: > > Presence Detect State - This bit indicates the presence of an adapter > in the slot, reflected by the logical "OR" of the Physical Layer > in-band presence detect mechanism and, if present, any out-of-band > presence detect mechanism defined for the slot's corresponding > form factor. > > > The ECN that changes this behavior (Async Hot-Plug Updates ECN) is > ratified and published to the PCI-SIG website. It modifies PCIe Base > Spec 4.0 and will be incorporated into PCIe Base Spec 5.0. Check out > the ECN section titled "In-band Presence Detect Mechanism Deprecated > for Async Hot-Plug". My copy of the 5.0-0.9 spec missed out on this ECN. The new changes look like it more clearly defines expected software and hardware behavior, so I'm looking forward to seeing the hardware implementations. Thanks for driving that.
