[PATCH V5 2/4] arm64: Support Generic Initiator only domains
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: 2019-10-04 11:44:22
Also in:
linux-acpi, linux-mm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
The one thing that currently needs doing from an architecture point of view is associating the GI domain with its nearest memory domain. This allows all the standard NUMA aware code to get a 'reasonable' answer. A clever driver might elect to do load balancing etc if there are multiple host / memory domains nearby, but that's a decision for the driver. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- arch/arm64/kernel/smp.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index dc9fe879c279..fd7f6b1cdc84 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c@@ -713,6 +713,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) { int err; unsigned int cpu; + unsigned int node; unsigned int this_cpu; init_cpu_topology();
@@ -751,6 +752,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus) set_cpu_present(cpu, true); numa_store_cpu_info(cpu); } + + /* + * Walk the numa domains and set the node to numa memory reference + * for any that are Generic Initiator Only. + */ + for_each_node_state(node, N_GENERIC_INITIATOR) + set_gi_numa_mem(node, local_memory_node(node)); } void (*__smp_cross_call)(const struct cpumask *, unsigned int);
--
2.20.1
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