On Monday, July 28, 2008 7:43 pm Kenji Kaneshige wrote: > > Your systems don't have _RMV methods for the hotpluggable PCIe slots in > > the DSDT? That's a shame; the Windows docs I found on PCIe hotplug > > seemed to indicate that _RMV and _OSC (under Vista) were used to detect > > whether a given slot was hot pluggable (I just googled for "windows pcie > > hotplug" or something) so I was hoping that would be a reliable method... > > Any other ideas? I'll go see if I can dig up some ExpressCard info. > > My systems don't have _RMV methods for the hot pluggable PCIe slots in the > DSDT, but I don't think that's a shame. I suppose that the document you are > referring describes how Windows handles ExpressCard slots. In my > understanding, Hot Plug Surprise bit in the Slot Capabilities register is > set to 1b on ExpressCard slots, and I believe that ACPI _RVM method is for > the device that only supports surprise-style removal. I think this is why > your system implements _RMV method for slots. Yeah, that may be. The document wasn't very clear; I was hoping that something simple would be available. > On the other hand, hot pluggable slots on my servers are *not* ExpressCard > slots, and all of them have Power Controller instead of surprise-style > removal (Hot Plug Surprise bit in the Slot Capabilities register is set to > 0b). So I believe there is no reason to implement _RMV methods for the hot > pluggable PCIe slots on my systems. > > Here is an idea. How about using _RMV method to determine whether a given > slot is actually hot pluggable when Hot Plug Surprise bit in the Slot > Capabilities register is set to 1b on the slot? This is based on a little > rough assumption that all PCIe slots that support surprise-style removal > have _RMV method, though. Does this work for you? It's worth a try. We need *some* sort of better method to detect hot pluggable slots... Thanks, Jesse -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
