x86: move X86_FEATURE_CONSTANT_TSC into early cpu feature detection

Need this in the next patch in time_init and that happens early.

This includes a minor fix on i386 where early_intel_workarounds()
[which is now called early_init_intel] really executes early as
the comments say.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 31 insertions, 8 deletions

diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 8618178db842..3cae326093cb 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -544,9 +544,6 @@ static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
                 c->x86_cache_size, ecx & 0xFF);
         }
-
-        if (n >= 0x80000007)
-                cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
         if (n >= 0x80000008) {
                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
                 c->x86_virt_bits = (eax >> 8) & 0xff;
@@ -624,7 +621,7 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 #endif
 }
 
-static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
+static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_SMP
         unsigned bits, ecx;
@@ -682,6 +679,15 @@ static __cpuinit int amd_apic_timer_broken(void)
         return 0;
 }
 
+static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
+{
+        early_init_amd_mc(c);
+
+        /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
+        if (c->x86_power & (1<<8))
+                set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+}
+
 static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 {
         unsigned level;
@@ -731,10 +737,6 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
         }
         display_cacheinfo(c);
 
-        /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
-        if (c->x86_power & (1<<8))
-                set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
-
         /* Multi core CPU? */
         if (c->extended_cpuid_level >= 0x80000008)
                 amd_detect_cmp(c);
@@ -845,6 +847,13 @@ static void srat_detect_node(void)
 #endif
 }
 
+static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
+{
+        if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+            (c->x86 == 0x6 && c->x86_model >= 0x0e))
+                set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
+}
+
 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 {
         /* Cache sizes */
@@ -1056,6 +1065,20 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 #ifdef CONFIG_NUMA
         numa_add_cpu(smp_processor_id());
 #endif
+
+        c->extended_cpuid_level = cpuid_eax(0x80000000);
+
+        if (c->extended_cpuid_level >= 0x80000007)
+                c->x86_power = cpuid_edx(0x80000007);
+
+        switch (c->x86_vendor) {
+        case X86_VENDOR_AMD:
+                early_init_amd(c);
+                break;
+        case X86_VENDOR_INTEL:
+                early_init_intel(c);
+                break;
+        }
 }
 
 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)