Pull sbs into release branch

[pandora-kernel.git] / arch / i386 / kernel / cpu / common.c

diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 5faf675..d506201 100644 (file)
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -18,11 +18,10 @@
 #include <asm/apic.h>
 #include <mach_apic.h>
 #endif
-#include <asm/pda.h>
 
 #include "cpu.h"
 
-DEFINE_PER_CPU(struct desc_struct, cpu_gdt[GDT_ENTRIES]) = {
+DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
        [GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
        [GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
        [GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
@@ -47,12 +46,9 @@ DEFINE_PER_CPU(struct desc_struct, cpu_gdt[GDT_ENTRIES]) = {
        [GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
 
        [GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-       [GDT_ENTRY_PDA] = { 0x00000000, 0x00c09200 }, /* set in setup_pda */
-};
-EXPORT_PER_CPU_SYMBOL_GPL(cpu_gdt);
-
-DEFINE_PER_CPU(struct i386_pda, _cpu_pda);
-EXPORT_PER_CPU_SYMBOL(_cpu_pda);
+       [GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+} };
+EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
 static int cachesize_override __cpuinitdata = -1;
 static int disable_x86_fxsr __cpuinitdata;
@@ -357,6 +353,8 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
                        if ( xlvl >= 0x80000004 )
                                get_model_name(c); /* Default name */
                }
+
+               init_scattered_cpuid_features(c);
        }
 
        early_intel_workaround(c);
@@ -394,7 +392,7 @@ __setup("serialnumber", x86_serial_nr_setup);
 /*
  * This does the hard work of actually picking apart the CPU stuff...
  */
-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 {
        int i;
 
@@ -505,15 +503,22 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 
        /* Init Machine Check Exception if available. */
        mcheck_init(c);
+}
 
-       if (c == &boot_cpu_data)
-               sysenter_setup();
+void __init identify_boot_cpu(void)
+{
+       identify_cpu(&boot_cpu_data);
+       sysenter_setup();
        enable_sep_cpu();
+       mtrr_bp_init();
+}
 
-       if (c == &boot_cpu_data)
-               mtrr_bp_init();
-       else
-               mtrr_ap_init();
+void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
+{
+       BUG_ON(c == &boot_cpu_data);
+       identify_cpu(c);
+       enable_sep_cpu();
+       mtrr_ap_init();
 }
 
 #ifdef CONFIG_X86_HT
@@ -601,7 +606,6 @@ extern int nsc_init_cpu(void);
 extern int amd_init_cpu(void);
 extern int centaur_init_cpu(void);
 extern int transmeta_init_cpu(void);
-extern int rise_init_cpu(void);
 extern int nexgen_init_cpu(void);
 extern int umc_init_cpu(void);
 
@@ -613,7 +617,6 @@ void __init early_cpu_init(void)
        amd_init_cpu();
        centaur_init_cpu();
        transmeta_init_cpu();
-       rise_init_cpu();
        nexgen_init_cpu();
        umc_init_cpu();
        early_cpu_detect();
@@ -627,20 +630,25 @@ void __init early_cpu_init(void)
 #endif
 }
 
-/* Make sure %gs is initialized properly in idle threads */
+/* Make sure %fs is initialized properly in idle threads */
 struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
 {
        memset(regs, 0, sizeof(struct pt_regs));
-       regs->xfs = __KERNEL_PDA;
+       regs->xfs = __KERNEL_PERCPU;
        return regs;
 }
 
-/* Initial PDA used by boot CPU */
-struct i386_pda boot_pda = {
-       ._pda = &boot_pda,
-       .cpu_number = 0,
-       .pcurrent = &init_task,
-};
+/* Current gdt points %fs at the "master" per-cpu area: after this,
+ * it's on the real one. */
+void switch_to_new_gdt(void)
+{
+       struct Xgt_desc_struct gdt_descr;
+
+       gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
+       gdt_descr.size = GDT_SIZE - 1;
+       load_gdt(&gdt_descr);
+       asm("mov %0, %%fs" : : "r" (__KERNEL_PERCPU) : "memory");
+}
 
 /*
  * cpu_init() initializes state that is per-CPU. Some data is already
@@ -672,6 +680,7 @@ void __cpuinit cpu_init(void)
        }
 
        load_idt(&idt_descr);
+       switch_to_new_gdt();
 
        /*
         * Set up and load the per-CPU TSS and LDT