x86, cpu init: call early_init_xxx in init_xxx

so we:

 1. could set some cap to ap
 2. restore some cap after memset in identify_cpu for boot cpu

esp for CONSTANT_TSC this matters, as:

before this patch:
 flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow rep_good nopl pni monitor cx16 lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs

after this patch:
 flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl pni monitor cx16 lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs

so constant_tsc is back...
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/amd.c

@@ -26,11 +26,8 @@ __asm__(".align 4\nvide: ret");
 
 static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 {
-	if (cpuid_eax(0x80000000) >= 0x80000007) {
-		c->x86_power = cpuid_edx(0x80000007);
-		if (c->x86_power & (1<<8))
-			set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
-	}
+	if (c->x86_power & (1<<8))
+		set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
 
 	/*  Set MTRR capability flag if appropriate */
 	if (c->x86_model == 13 || c->x86_model == 9 ||

arch/x86/kernel/cpu/amd_64.c

@@ -140,6 +140,8 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 	}
 #endif
 
+	early_init_amd(c);
+
 	/* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
 	   3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
 	clear_cpu_cap(c, 0*32+31);

arch/x86/kernel/cpu/centaur_64.c

@@ -16,6 +16,8 @@ static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
 
 static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 {
+	early_init_centaur(c);
+
 	if (c->x86 == 0x6 && c->x86_model >= 0xf) {
 		c->x86_cache_alignment = c->x86_clflush_size * 2;
 		set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);

arch/x86/kernel/cpu/common.c

@@ -473,9 +473,6 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
 			c->x86_capability[2] = cpuid_edx(0x80860001);
 	}
 
-	if (c->extended_cpuid_level >= 0x80000007)
-		c->x86_power = cpuid_edx(0x80000007);
-
 	if (c->extended_cpuid_level >= 0x80000008) {
 		u32 eax = cpuid_eax(0x80000008);
 
@@ -483,6 +480,10 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
 		c->x86_phys_bits = eax & 0xff;
 	}
 #endif
+
+	if (c->extended_cpuid_level >= 0x80000007)
+		c->x86_power = cpuid_edx(0x80000007);
+
 }
 /*
  * Do minimum CPU detection early.

arch/x86/kernel/cpu/intel_64.c

@@ -54,6 +54,8 @@ static void __cpuinit srat_detect_node(void)
 
 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 {
+	early_init_intel(c);
+
 	init_intel_cacheinfo(c);
 	if (c->cpuid_level > 9) {
 		unsigned eax = cpuid_eax(10);