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Subject[PATCH v5 09/12] x86/common.c: Init CPU0 data during CPU0 online
Date
From: Fenghua Yu <fenghua.yu@intel.com>

During CPU0 online, enable x2apic, re-init mcheck, set_numa_node, add numa mask,
and enable sep cpu for CPU0.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
arch/x86/include/asm/processor.h | 1 +
arch/x86/kernel/cpu/common.c | 17 ++++++++++++++---
2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index aa9088c..861d0e9 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -160,6 +160,7 @@ extern struct pt_regs *idle_regs(struct pt_regs *);

extern void early_cpu_init(void);
extern void identify_boot_cpu(void);
+extern void identify_boot_cpu_online(void);
extern void identify_secondary_cpu(struct cpuinfo_x86 *);
extern void print_cpu_info(struct cpuinfo_x86 *);
extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index d43cad7..300e3e2 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -911,6 +911,18 @@ void __init identify_boot_cpu(void)
#endif
}

+void __cpuinit identify_boot_cpu_online(void)
+{
+ mcheck_cpu_init(&boot_cpu_data);
+
+#ifdef CONFIG_NUMA
+ numa_add_cpu(smp_processor_id());
+#endif
+#ifdef CONFIG_X86_32
+ enable_sep_cpu();
+#endif
+}
+
void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
{
BUG_ON(c == &boot_cpu_data);
@@ -1189,7 +1201,7 @@ void __cpuinit cpu_init(void)
oist = &per_cpu(orig_ist, cpu);

#ifdef CONFIG_NUMA
- if (cpu != 0 && percpu_read(numa_node) == 0 &&
+ if (percpu_read(numa_node) == 0 &&
early_cpu_to_node(cpu) != NUMA_NO_NODE)
set_numa_node(early_cpu_to_node(cpu));
#endif
@@ -1221,8 +1233,7 @@ void __cpuinit cpu_init(void)
barrier();

x86_configure_nx();
- if (cpu != 0)
- enable_x2apic();
+ enable_x2apic();

/*
* set up and load the per-CPU TSS
--
1.6.0.3


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