[PATCH 1/3] x86: introduce cpuinfo->cpu_node_id to reflecttopology of multi-node CPU

[Andreas Herrmann]

Signed-off-by: Andreas Herrmann <andreas.herrmann3@xxxxxxx>
---
 arch/x86/include/asm/processor.h |    2 ++
 arch/x86/kernel/cpu/common.c     |    2 ++
 arch/x86/kernel/cpu/proc.c       |    1 +
 arch/x86/kernel/smpboot.c        |    5 ++++-
 4 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 0b2fab0..b49d72b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -106,6 +106,8 @@ struct cpuinfo_x86 {
 	u16			booted_cores;
 	/* Physical processor id: */
 	u16			phys_proc_id;
+	/* Node id in case of multi-node processor: */
+	u16			cpu_node_id;
 	/* Core id: */
 	u16			cpu_core_id;
 	/* Index into per_cpu list: */
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 591012f..9bff330 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -470,6 +470,8 @@ out:
 	if ((c->x86_max_cores * smp_num_siblings) > 1) {
 		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
 		       c->phys_proc_id);
+		printk(KERN_INFO  "CPU: Processor Node ID: %d\n",
+		       c->cpu_node_id);
 		printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
 		       c->cpu_core_id);
 	}
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index f93047f..e761c90 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -13,6 +13,7 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
 #ifdef CONFIG_SMP
 	if (c->x86_max_cores * smp_num_siblings > 1) {
 		seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
+		seq_printf(m, "node id\t\t: %d\n", c->cpu_node_id);
 		seq_printf(m, "siblings\t: %d\n",
 			   cpumask_weight(cpu_sibling_mask(cpu)));
 		seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index d2e8de9..dc0e735 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -374,6 +374,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
 			struct cpuinfo_x86 *o = &cpu_data(i);
 
 			if (c->phys_proc_id == o->phys_proc_id &&
+			    c->cpu_node_id == o->cpu_node_id &&
 			    c->cpu_core_id == o->cpu_core_id) {
 				cpumask_set_cpu(i, cpu_sibling_mask(cpu));
 				cpumask_set_cpu(cpu, cpu_sibling_mask(i));
@@ -401,7 +402,8 @@ void __cpuinit set_cpu_sibling_map(int cpu)
 			cpumask_set_cpu(i, c->llc_shared_map);
 			cpumask_set_cpu(cpu, cpu_data(i).llc_shared_map);
 		}
-		if (c->phys_proc_id == cpu_data(i).phys_proc_id) {
+		if (c->phys_proc_id == cpu_data(i).phys_proc_id &&
+		    c->cpu_node_id == cpu_data(i).cpu_node_id) {
 			cpumask_set_cpu(i, cpu_core_mask(cpu));
 			cpumask_set_cpu(cpu, cpu_core_mask(i));
 			/*
@@ -1218,6 +1220,7 @@ static void remove_siblinginfo(int cpu)
 	cpumask_clear(cpu_sibling_mask(cpu));
 	cpumask_clear(cpu_core_mask(cpu));
 	c->phys_proc_id = 0;
+	c->cpu_node_id = 0;
 	c->cpu_core_id = 0;
 	cpumask_clear_cpu(cpu, cpu_sibling_setup_mask);
 }
-- 
1.6.2



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