x86: introduce initial apicid

store initial_apicid from early identify. it is could be different from
phys_proc_id later.

also print it out in /proc/cpuinfo.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index e8e58c09625d..0978a4a39418 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -19,6 +19,8 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
                            cpus_weight(per_cpu(cpu_core_map, cpu)));
                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
+                seq_printf(m, "apicid\t\t: %d\n", c->apicid);
+                seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
         }
 #endif
 }
@@ -60,6 +62,7 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
+                seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
         }
 #endif
 }