- ACPI considerations for PCI host bridges
+.. SPDX-License-Identifier: GPL-2.0
+
+========================================
+ACPI considerations for PCI host bridges
+========================================
The general rule is that the ACPI namespace should describe everything the
OS might use unless there's another way for the OS to find it [1, 2].
[4] ACPI 6.2, sec 6.4.3.5.1, 2, 3, 4:
QWord/DWord/Word Address Space Descriptor (.1, .2, .3)
- General Flags: Bit [0] Ignored
+ General Flags: Bit [0] Ignored
Extended Address Space Descriptor (.4)
- General Flags: Bit [0] Consumer/Producer:
- 1–This device consumes this resource
- 0–This device produces and consumes this resource
+ General Flags: Bit [0] Consumer/Producer:
+
+ * 1 – This device consumes this resource
+ * 0 – This device produces and consumes this resource
[5] ACPI 6.2, sec 19.6.43:
ResourceUsage specifies whether the Memory range is consumed by