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The ACPI specification allows you to provide _PXM entries for devices based
on their location on a particular bus. Let us use that if it is provided
rather than just assuming it makes sense to put the device into the
proximity domain of the root.
An example DSDT entry that will supply this is:
Device (PCI2)
{
Name (_HID, "PNP0A08") // PCI Express Root Bridge
Name (_CID, "PNP0A03") // Compatible PCI Root Bridge
Name(_SEG, 2) // Segment of this Root complex
Name(_BBN, 0xF8) // Base Bus Number
Name(_CCA, 1)
Method (_PXM, 0, NotSerialized) {
Return(0x00)
}
...
Device (BRI0) {
Name (_HID, "19E51610")
Name (_ADR, 0)
Name (_BBN, 0xF9)
Device (CAR0) {
Name (_HID, "97109912")
Name (_ADR, 0)
Method (_PXM, 0, NotSerialized) {
Return(0x02)
}
}
}
}
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
bad7dcd94f