_DSM Property: "use-msi" & "sata-express-power-off"

[Ramalama]

"use-msi"

 

"sata-express-power-off"

Method (_DSM, 4, NotSerialized)  // _DSM: Device-Specific Method
                    {
                        Store (Package (0x04)
                            {
                                "use-msi", 
                                0x01, 
                                "sata-express-power-off", 
                                0x01
                            }, Local0)
                        DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
                        Return (Local0)
                    }

Does anyone know, what they are for?

 

It's in all Haswell with SSD, Apple tables...

 

Something for PowerManagement, but what exactly?

 

I added them into my DSDT, now this properties are in ioreg, but they didn't change anything for me...

everything is working like before...

 

Cheers :-)

[miqlas]

You don't have SATA-Express, do you?

[jamiethemorris]

It looks like it's probably power management for sata express. I'm not sure how you would check to see if power management is doing anything though.