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arm64, numa: Add NUMA support for arm64 platforms.

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Attempt to get the memory and CPU NUMA node via of_numa.  If that
fails, default the dummy NUMA node and map all memory and CPUs to node
0.

Tested-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ganapatrao Kulkarni
2016-04-08 15:50:27 -07:00
committed by Will Deacon
parent 3194ac6e66
commit 1a2db30034
10 changed files with 538 additions and 5 deletions
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4
arch/arm64/kernel/smp.c
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@@ -45,6 +45,7 @@
#include <asm/cputype.h>
#include <asm/cpu_ops.h>
#include <asm/mmu_context.h>
#include <asm/numa.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/processor.h>
@@ -203,6 +204,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
static void smp_store_cpu_info(unsigned int cpuid)
{
store_cpu_topology(cpuid);
numa_store_cpu_info(cpuid);
}
/*
@@ -633,6 +635,8 @@ static void __init of_parse_and_init_cpus(void)
pr_debug("cpu logical map 0x%llx\n", hwid);
cpu_logical_map(cpu_count) = hwid;
early_map_cpu_to_node(cpu_count, of_node_to_nid(dn));
next:
cpu_count++;
}