Commit 0c436a58 authored by Saurabh Sengar's avatar Saurabh Sengar Committed by Ingo Molnar
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x86/numa: Add Devicetree support 



Hyper-V has usecases where it needs to fetch NUMA information from
Devicetree. Currently, it is not possible to extract the NUMA information
from Devicetree for the x86 arch.

Add support for Devicetree in the x86_numa_init() function, allowing the
retrieval of NUMA node information from the Devicetree.

Signed-off-by: default avatarSaurabh Sengar <ssengar@linux.microsoft.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/1692949657-16446-2-git-send-email-ssengar@linux.microsoft.com
parent 0d294c8c

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1534,6 +1534,7 @@ config NUMA 
	depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP)

	default y if X86_BIGSMP

	select USE_PERCPU_NUMA_NODE_ID

	select OF_NUMA if OF

	help

	  Enable NUMA (Non-Uniform Memory Access) support.

arch/x86/mm/numa.c

+3 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
#include <linux/acpi.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/of.h>

#include <linux/string.h>

#include <linux/init.h>

#include <linux/memblock.h>
@@ -733,6 +734,8 @@ void __init x86_numa_init(void) 
		if (!numa_init(amd_numa_init))

			return;

#endif

		if (acpi_disabled && !numa_init(of_numa_init))

			return;

	}



	numa_init(dummy_numa_init);