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| author | Shanker Donthineni <shankerd@codeaurora.org> | 2017-03-29 13:39:19 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-04-18 16:56:39 +0200 |
| commit | 79f97c3051e16b117b47e0586a368c4f54a82909 (patch) | |
| tree | 56964eb425a1fdac7dff8c2f6da4fab050cd8b49 /drivers/acpi/acpi_platform.c | |
| parent | Linux 4.11-rc7 (diff) | |
| download | linux-79f97c3051e16b117b47e0586a368c4f54a82909.tar.xz linux-79f97c3051e16b117b47e0586a368c4f54a82909.zip | |
ACPI / platform: Update platform device NUMA node based on _PXM method
The optional _PXM method evaluates to an integer that identifies the
proximity domain of a device object. On ACPI based kernel boot, the
field numa_node in 'struct device' is always set to -1 irrespective
of _PXM value that is specified in the ACPI device object. But in
case of device-tree based kernel boot the numa_node field is populated
and reflects to a DT property that is specified in DTS according to
the below document.
https://www.kernel.org/doc/Documentation/devicetree/bindings/numa.txt
http://lxr.free-electrons.com/source/drivers/of/device.c#L54
Without this patch dev_to_node() always returns -1 for all platform
devices. This patch adds support for the ACPI _PXM method and updates
the platform device NUMA node id using acpi_get_node() which provides
the PXM-to-NUMA mapping information.
The individual platform device drivers should be able to use the
NUMA-aware memory allocation functions kmalloc_node() and
alloc_pages_node() to improve performance.
Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Jiandi An <anjiandi@codeaurora.org>
[ rjw: Subject / changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpi_platform.c')
| -rw-r--r-- | drivers/acpi/acpi_platform.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c index 03250e1f1103..88cd949003f3 100644 --- a/drivers/acpi/acpi_platform.c +++ b/drivers/acpi/acpi_platform.c @@ -121,11 +121,14 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev, if (IS_ERR(pdev)) dev_err(&adev->dev, "platform device creation failed: %ld\n", PTR_ERR(pdev)); - else + else { + set_dev_node(&pdev->dev, acpi_get_node(adev->handle)); dev_dbg(&adev->dev, "created platform device %s\n", dev_name(&pdev->dev)); + } kfree(resources); + return pdev; } EXPORT_SYMBOL_GPL(acpi_create_platform_device); |