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SubjectRe: [PATCH 1/1] pci: Pick up the acpi numa node value if it is specified at the device level.
[+cc ACPI folks, LKML]

On Wed, Sep 12, 2018 at 04:21:40PM +0100, Jonathan Cameron wrote:
> 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>

Applied with subject:

ACPI/PCI: Pay attention to device-specific _PXM node values

to pci/enumeration for v4.20, thanks!

> ---
> drivers/pci/pci-acpi.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
> index 738e3546abb1..f2f5f0ddd60e 100644
> --- a/drivers/pci/pci-acpi.c
> +++ b/drivers/pci/pci-acpi.c
> @@ -753,10 +753,15 @@ static void pci_acpi_setup(struct device *dev)
> {
> struct pci_dev *pci_dev = to_pci_dev(dev);
> struct acpi_device *adev = ACPI_COMPANION(dev);
> + int node;
>
> if (!adev)
> return;
>
> + node = acpi_get_node(adev->handle);
> + if (node != NUMA_NO_NODE)
> + set_dev_node(dev, node);
> +
> pci_acpi_optimize_delay(pci_dev, adev->handle);
>
> pci_acpi_add_pm_notifier(adev, pci_dev);
> --
> 2.18.0
>
>

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