x86: Add a BSP cpu_dev helper

Add a function ptr to struct cpu_dev which is destined to be run only
once on the BSP during boot.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/20110805180116.GB26217@aftab
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 22a073d7fbff..8ed394a8eb6e 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -681,6 +681,9 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
         filter_cpuid_features(c, false);
 
         setup_smep(c);
+
+        if (this_cpu->c_bsp_init)
+                this_cpu->c_bsp_init(c);
 }
 
 void __init early_cpu_init(void)
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h
index e765633f210e..1b22dcc51af4 100644
--- a/arch/x86/kernel/cpu/cpu.h
+++ b/arch/x86/kernel/cpu/cpu.h
@@ -18,6 +18,7 @@ struct cpu_dev {
         struct          cpu_model_info c_models[4];
 
         void            (*c_early_init)(struct cpuinfo_x86 *);
+        void            (*c_bsp_init)(struct cpuinfo_x86 *);
         void            (*c_init)(struct cpuinfo_x86 *);
         void            (*c_identify)(struct cpuinfo_x86 *);
         unsigned int    (*c_size_cache)(struct cpuinfo_x86 *, unsigned int);