1 files changed, 67 insertions, 78 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 83492b1f93b..0f73ea42308 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -21,14 +21,16 @@
 #include <asm/asm.h>
 #include <asm/numa.h>
 #include <asm/smp.h>
+#include <asm/cpu.h>
+#include <asm/cpumask.h>
 #ifdef CONFIG_X86_LOCAL_APIC
 #include <asm/mpspec.h>
 #include <asm/apic.h>
 #include <mach_apic.h>
 #include <asm/genapic.h>
+#include <asm/uv/uv.h>
 #endif
 
-#include <asm/pda.h>
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 #include <asm/desc.h>
@@ -50,6 +52,15 @@ cpumask_var_t cpu_initialized_mask;
 /* representing cpus for which sibling maps can be computed */
 cpumask_var_t cpu_sibling_setup_mask;
 
+/* correctly size the local cpu masks */
+void __init setup_cpu_local_masks(void)
+{
+        alloc_bootmem_cpumask_var(&cpu_initialized_mask);
+        alloc_bootmem_cpumask_var(&cpu_callin_mask);
+        alloc_bootmem_cpumask_var(&cpu_callout_mask);
+        alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask);
+}
+
 #else /* CONFIG_X86_32 */
 
 cpumask_t cpu_callin_map;
@@ -62,23 +73,23 @@ cpumask_t cpu_sibling_setup_map;
 
 static struct cpu_dev *this_cpu __cpuinitdata;
 
+DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
 #ifdef CONFIG_X86_64
-/* We need valid kernel segments for data and code in long mode too
- * IRET will check the segment types  kkeil 2000/10/28
- * Also sysret mandates a special GDT layout
- */
-/* The TLS descriptors are currently at a different place compared to i386.
-   Hopefully nobody expects them at a fixed place (Wine?) */
-DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
+        /*
+         * We need valid kernel segments for data and code in long mode too
+         * IRET will check the segment types  kkeil 2000/10/28
+         * Also sysret mandates a special GDT layout
+         *
+         * The TLS descriptors are currently at a different place compared to i386.
+         * Hopefully nobody expects them at a fixed place (Wine?)
+         */
         [GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
         [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
         [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
         [GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
         [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
         [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
-} };
 #else
-DEFINE_PER_CPU_PAGE_ALIGNED(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 } } },
@@ -110,9 +121,9 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
         [GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
         [GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
-        [GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
-} };
+        [GDT_ENTRY_PERCPU] = { { { 0x0000ffff, 0x00cf9200 } } },
 #endif
+} };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
 #ifdef CONFIG_X86_32
@@ -242,18 +253,28 @@ static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
 
 __u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
 
+void load_percpu_segment(int cpu)
+{
+#ifdef CONFIG_X86_32
+        loadsegment(fs, __KERNEL_PERCPU);
+#else
+        loadsegment(gs, 0);
+        wrmsrl(MSR_GS_BASE, (unsigned long)per_cpu(irq_stack_union.gs_base, cpu));
+#endif
+}
+
 /* Current gdt points %fs at the "master" per-cpu area: after this,
  * it's on the real one. */
-void switch_to_new_gdt(void)
+void switch_to_new_gdt(int cpu)
 {
         struct desc_ptr gdt_descr;
 
-        gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
+        gdt_descr.address = (long)get_cpu_gdt_table(cpu);
         gdt_descr.size = GDT_SIZE - 1;
         load_gdt(&gdt_descr);
-#ifdef CONFIG_X86_32
-        asm("mov %0, %%fs" : : "r" (__KERNEL_PERCPU) : "memory");
-#endif
+        /* Reload the per-cpu base */
+
+        load_percpu_segment(cpu);
 }
 
 static struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
@@ -877,54 +898,26 @@ static __init int setup_disablecpuid(char *arg)
 __setup("clearcpuid=", setup_disablecpuid);
 
 #ifdef CONFIG_X86_64
-struct x8664_pda **_cpu_pda __read_mostly;
-EXPORT_SYMBOL(_cpu_pda);
-
 struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
 
-static char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
+DEFINE_PER_CPU_FIRST(union irq_stack_union,
+                     irq_stack_union) __aligned(PAGE_SIZE);
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(char *, irq_stack_ptr);  /* will be set during per cpu init */
+#else
+DEFINE_PER_CPU(char *, irq_stack_ptr) =
+        per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE - 64;
+#endif
 
-void __cpuinit pda_init(int cpu)
-{
-        struct x8664_pda *pda = cpu_pda(cpu);
+DEFINE_PER_CPU(unsigned long, kernel_stack) =
+        (unsigned long)&init_thread_union - KERNEL_STACK_OFFSET + THREAD_SIZE;
+EXPORT_PER_CPU_SYMBOL(kernel_stack);
 
-        /* Setup up data that may be needed in __get_free_pages early */
-        loadsegment(fs, 0);
-        loadsegment(gs, 0);
-        /* Memory clobbers used to order PDA accessed */
-        mb();
-        wrmsrl(MSR_GS_BASE, pda);
-        mb();
-
-        pda->cpunumber = cpu;
-        pda->irqcount = -1;
-        pda->kernelstack = (unsigned long)stack_thread_info() -
-                                 PDA_STACKOFFSET + THREAD_SIZE;
-        pda->active_mm = &init_mm;
-        pda->mmu_state = 0;
-
-        if (cpu == 0) {
-                /* others are initialized in smpboot.c */
-                pda->pcurrent = &init_task;
-                pda->irqstackptr = boot_cpu_stack;
-                pda->irqstackptr += IRQSTACKSIZE - 64;
-        } else {
-                if (!pda->irqstackptr) {
-                        pda->irqstackptr = (char *)
-                                __get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
-                        if (!pda->irqstackptr)
-                                panic("cannot allocate irqstack for cpu %d",
-                                      cpu);
-                        pda->irqstackptr += IRQSTACKSIZE - 64;
-                }
+DEFINE_PER_CPU(unsigned int, irq_count) = -1;
 
-                if (pda->nodenumber == 0 && cpu_to_node(cpu) != NUMA_NO_NODE)
-                        pda->nodenumber = cpu_to_node(cpu);
-        }
-}
-
-static char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ +
-                                  DEBUG_STKSZ] __page_aligned_bss;
+static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks
+        [(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ])
+        __aligned(PAGE_SIZE);
 
 extern asmlinkage void ignore_sysret(void);
 
@@ -982,15 +975,14 @@ void __cpuinit cpu_init(void)
         struct tss_struct *t = &per_cpu(init_tss, cpu);
         struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
         unsigned long v;
-        char *estacks = NULL;
         struct task_struct *me;
         int i;
 
-        /* CPU 0 is initialised in head64.c */
-        if (cpu != 0)
-                pda_init(cpu);
-        else
-                estacks = boot_exception_stacks;
+#ifdef CONFIG_NUMA
+        if (cpu != 0 && percpu_read(node_number) == 0 &&
+            cpu_to_node(cpu) != NUMA_NO_NODE)
+                percpu_write(node_number, cpu_to_node(cpu));
+#endif
 
         me = current;
 
@@ -1006,7 +998,9 @@ void __cpuinit cpu_init(void)
          * and set up the GDT descriptor:
          */
 
-        switch_to_new_gdt();
+        switch_to_new_gdt(cpu);
+        loadsegment(fs, 0);
+
         load_idt((const struct desc_ptr *)&idt_descr);
 
         memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
@@ -1024,18 +1018,13 @@ void __cpuinit cpu_init(void)
          * set up and load the per-CPU TSS
          */
         if (!orig_ist->ist[0]) {
-                static const unsigned int order[N_EXCEPTION_STACKS] = {
-                  [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
-                  [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
+                static const unsigned int sizes[N_EXCEPTION_STACKS] = {
+                  [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STKSZ,
+                  [DEBUG_STACK - 1] = DEBUG_STKSZ
                 };
+                char *estacks = per_cpu(exception_stacks, cpu);
                 for (v = 0; v < N_EXCEPTION_STACKS; v++) {
-                        if (cpu) {
-                                estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
-                                if (!estacks)
-                                        panic("Cannot allocate exception "
-                                              "stack %ld %d\n", v, cpu);
-                        }
-                        estacks += PAGE_SIZE << order[v];
+                        estacks += sizes[v];
                         orig_ist->ist[v] = t->x86_tss.ist[v] =
                                         (unsigned long)estacks;
                 }
@@ -1114,7 +1103,7 @@ void __cpuinit cpu_init(void)
                 clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
 
         load_idt(&idt_descr);
-        switch_to_new_gdt();
+        switch_to_new_gdt(cpu);
 
         /*
          * Set up and load the per-CPU TSS and LDT