fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / x86_64 / kernel / setup64.c

diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 07772c8..7ba429b 100644 (file)
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -3,9 +3,7 @@
  * Copyright (C) 1995  Linus Torvalds
  * Copyright 2001, 2002, 2003 SuSE Labs / Andi Kleen.
  * See setup.c for older changelog.
- * $Id: setup64.c,v 1.12 2002/03/21 10:09:17 ak Exp $
  */ 
-#include <linux/config.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
@@ -26,58 +24,22 @@
 #include <asm/proto.h>
 #include <asm/sections.h>
 
-char x86_boot_params[BOOT_PARAM_SIZE] __initdata = {0,};
+char x86_boot_params[BOOT_PARAM_SIZE] __initdata;
 
 cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
 
 struct x8664_pda *_cpu_pda[NR_CPUS] __read_mostly;
+EXPORT_SYMBOL(_cpu_pda);
 struct x8664_pda boot_cpu_pda[NR_CPUS] __cacheline_aligned;
 
-struct desc_ptr idt_descr = { 256 * 16, (unsigned long) idt_table }; 
+struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
 
 char boot_cpu_stack[IRQSTACKSIZE] __attribute__((section(".bss.page_aligned")));
 
 unsigned long __supported_pte_mask __read_mostly = ~0UL;
+EXPORT_SYMBOL(__supported_pte_mask);
 static int do_not_nx __cpuinitdata = 0;
 
-/* noexec=on|off
-Control non executable mappings for 64bit processes.
-
-on     Enable(default)
-off    Disable
-*/ 
-int __init nonx_setup(char *str)
-{
-       if (!strncmp(str, "on", 2)) {
-                __supported_pte_mask |= _PAGE_NX; 
-               do_not_nx = 0; 
-       } else if (!strncmp(str, "off", 3)) {
-               do_not_nx = 1;
-               __supported_pte_mask &= ~_PAGE_NX;
-        }
-       return 0;
-} 
-__setup("noexec=", nonx_setup);        /* parsed early actually */
-
-int force_personality32 = READ_IMPLIES_EXEC;
-
-/* noexec32=on|off
-Control non executable heap for 32bit processes.
-To control the stack too use noexec=off
-
-on     PROT_READ does not imply PROT_EXEC for 32bit processes
-off    PROT_READ implies PROT_EXEC (default)
-*/
-static int __init nonx32_setup(char *str)
-{
-       if (!strcmp(str, "on"))
-               force_personality32 &= ~READ_IMPLIES_EXEC;
-       else if (!strcmp(str, "off"))
-               force_personality32 |= READ_IMPLIES_EXEC;
-       return 0;
-}
-__setup("noexec32=", nonx32_setup);
-
 /*
  * Great future plan:
  * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
@@ -93,12 +55,9 @@ void __init setup_per_cpu_areas(void)
 #endif
 
        /* Copy section for each CPU (we discard the original) */
-       size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
-#ifdef CONFIG_MODULES
-       if (size < PERCPU_ENOUGH_ROOM)
-               size = PERCPU_ENOUGH_ROOM;
-#endif
+       size = PERCPU_ENOUGH_ROOM;
 
+       printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n", size);
        for_each_cpu_mask (i, cpu_possible_map) {
                char *ptr;
 
@@ -122,7 +81,10 @@ void pda_init(int cpu)
 
        /* Setup up data that may be needed in __get_free_pages early */
        asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0)); 
+       /* Memory clobbers used to order PDA accessed */
+       mb();
        wrmsrl(MSR_GS_BASE, pda);
+       mb();
 
        pda->cpunumber = cpu; 
        pda->irqcount = -1;
@@ -191,6 +153,7 @@ void __cpuinit cpu_init (void)
 {
        int cpu = stack_smp_processor_id();
        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;
@@ -236,29 +199,18 @@ void __cpuinit cpu_init (void)
         * set up and load the per-CPU TSS
         */
        for (v = 0; v < N_EXCEPTION_STACKS; v++) {
+               static const unsigned int order[N_EXCEPTION_STACKS] = {
+                       [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
+                       [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
+               };
                if (cpu) {
-                       static const unsigned int order[N_EXCEPTION_STACKS] = {
-                               [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
-                               [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
-                       };
-
                        estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
                        if (!estacks)
                                panic("Cannot allocate exception stack %ld %d\n",
                                      v, cpu); 
                }
-               switch (v + 1) {
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
-               case DEBUG_STACK:
-                       cpu_pda[cpu].debugstack = (unsigned long)estacks;
-                       estacks += DEBUG_STKSZ;
-                       break;
-#endif
-               default:
-                       estacks += EXCEPTION_STKSZ;
-                       break;
-               }
-               t->ist[v] = (unsigned long)estacks;
+               estacks += PAGE_SIZE << order[v];
+               orig_ist->ist[v] = t->ist[v] = (unsigned long)estacks;
        }
 
        t->io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
@@ -283,12 +235,12 @@ void __cpuinit cpu_init (void)
         * Clear all 6 debug registers:
         */
 
-       set_debug(0UL, 0);
-       set_debug(0UL, 1);
-       set_debug(0UL, 2);
-       set_debug(0UL, 3);
-       set_debug(0UL, 6);
-       set_debug(0UL, 7);
+       set_debugreg(0UL, 0);
+       set_debugreg(0UL, 1);
+       set_debugreg(0UL, 2);
+       set_debugreg(0UL, 3);
+       set_debugreg(0UL, 6);
+       set_debugreg(0UL, 7);
 
        fpu_init();