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x86: Support Generic Initiator only proximity domains

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In common with memoryless domains only register GI domains
if the proximity node is not online. If a domain is already
a memory containing domain, or a memoryless domain there is
nothing to do just because it also contains a Generic Initiator.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jonathan Cameron 2020-09-30 22:05:43 +08:00 committed by Rafael J. Wysocki
parent 894c26a1c2
commit 73bf7382de
3 changed files with 24 additions and 0 deletions
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2
arch/x86/include/asm/numa.h
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@ -62,12 +62,14 @@ extern void numa_clear_node(int cpu);
extern void __init init_cpu_to_node(void);
extern void numa_add_cpu(int cpu);
extern void numa_remove_cpu(int cpu);
extern void init_gi_nodes(void);
#else /* CONFIG_NUMA */
static inline void numa_set_node(int cpu, int node) { }
static inline void numa_clear_node(int cpu) { }
static inline void init_cpu_to_node(void) { }
static inline void numa_add_cpu(int cpu) { }
static inline void numa_remove_cpu(int cpu) { }
static inline void init_gi_nodes(void) { }
#endif /* CONFIG_NUMA */
#ifdef CONFIG_DEBUG_PER_CPU_MAPS

1
arch/x86/kernel/setup.c
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@ -1218,6 +1218,7 @@ void __init setup_arch(char **cmdline_p)
prefill_possible_map();
init_cpu_to_node();
init_gi_nodes();
io_apic_init_mappings();

21
arch/x86/mm/numa.c
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@ -747,6 +747,27 @@ static void __init init_memory_less_node(int nid)
*/
}
/*
* A node may exist which has one or more Generic Initiators but no CPUs and no
* memory.
*
* This function must be called after init_cpu_to_node(), to ensure that any
* memoryless CPU nodes have already been brought online, and before the
* node_data[nid] is needed for zone list setup in build_all_zonelists().
*
* When this function is called, any nodes containing either memory and/or CPUs
* will already be online and there is no need to do anything extra, even if
* they also contain one or more Generic Initiators.
*/
void __init init_gi_nodes(void)
{
int nid;
for_each_node_state(nid, N_GENERIC_INITIATOR)
if (!node_online(nid))
init_memory_less_node(nid);
}
/*
* Setup early cpu_to_node.
*