The ACPI _HPP method was defined before PCIe existed, so its documentation
only mentions PCI. The _HPX Type 0 setting record is essentially identical
to _HPP, but the spec (ACPI rev 5.0, sec 6.2.8.1) says it should be applied
to PCI, PCI-X, and PCIe devices, with settings being ignored if they
The ACPI _HPP method was defined before PCIe existed, so its documentation
only mentions PCI. The _HPX Type 0 setting record is essentially identical
to _HPP, but the spec (ACPI rev 5.0, sec 6.2.8.1) says it should be applied
to PCI, PCI-X, and PCIe devices, with settings being ignored if they
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