Release 4.10 arch/x86/kernel/head64.c
/*
* prepare to run common code
*
* Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
*/
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/percpu.h>
#include <linux/start_kernel.h>
#include <linux/io.h>
#include <linux/memblock.h>
#include <asm/processor.h>
#include <asm/proto.h>
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/desc.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/sections.h>
#include <asm/kdebug.h>
#include <asm/e820.h>
#include <asm/bios_ebda.h>
#include <asm/bootparam_utils.h>
#include <asm/microcode.h>
#include <asm/kasan.h>
/*
* Manage page tables very early on.
*/
extern pgd_t early_level4_pgt[PTRS_PER_PGD];
extern pmd_t early_dynamic_pgts[EARLY_DYNAMIC_PAGE_TABLES][PTRS_PER_PMD];
static unsigned int __initdata next_early_pgt = 2;
pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);
/* Wipe all early page tables except for the kernel symbol map */
static void __init reset_early_page_tables(void)
{
memset(early_level4_pgt, 0, sizeof(pgd_t)*(PTRS_PER_PGD-1));
next_early_pgt = 0;
write_cr3(__pa_nodebug(early_level4_pgt));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| h. peter anvin | h. peter anvin | 16 | 41.03% | 1 | 25.00% |
| alexander kuleshov | alexander kuleshov | 13 | 33.33% | 1 | 25.00% |
| vivek goyal | vivek goyal | 9 | 23.08% | 1 | 25.00% |
| andrey ryabinin | andrey ryabinin | 1 | 2.56% | 1 | 25.00% |
| Total | 39 | 100.00% | 4 | 100.00% |
/* Create a new PMD entry */
int __init early_make_pgtable(unsigned long address)
{
unsigned long physaddr = address - __PAGE_OFFSET;
pgdval_t pgd, *pgd_p;
pudval_t pud, *pud_p;
pmdval_t pmd, *pmd_p;
/* Invalid address or early pgt is done ? */
if (physaddr >= MAXMEM || read_cr3() != __pa_nodebug(early_level4_pgt))
return -1;
again:
pgd_p = &early_level4_pgt[pgd_index(address)].pgd;
pgd = *pgd_p;
/*
* The use of __START_KERNEL_map rather than __PAGE_OFFSET here is
* critical -- __PAGE_OFFSET would point us back into the dynamic
* range and we might end up looping forever...
*/
if (pgd)
pud_p = (pudval_t *)((pgd & PTE_PFN_MASK) + __START_KERNEL_map - phys_base);
else {
if (next_early_pgt >= EARLY_DYNAMIC_PAGE_TABLES) {
reset_early_page_tables();
goto again;
}
pud_p = (pudval_t *)early_dynamic_pgts[next_early_pgt++];
memset(pud_p, 0, sizeof(*pud_p) * PTRS_PER_PUD);
*pgd_p = (pgdval_t)pud_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE;
}
pud_p += pud_index(address);
pud = *pud_p;
if (pud)
pmd_p = (pmdval_t *)((pud & PTE_PFN_MASK) + __START_KERNEL_map - phys_base);
else {
if (next_early_pgt >= EARLY_DYNAMIC_PAGE_TABLES) {
reset_early_page_tables();
goto again;
}
pmd_p = (pmdval_t *)early_dynamic_pgts[next_early_pgt++];
memset(pmd_p, 0, sizeof(*pmd_p) * PTRS_PER_PMD);
*pud_p = (pudval_t)pmd_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE;
}
pmd = (physaddr & PMD_MASK) + early_pmd_flags;
pmd_p[pmd_index(address)] = pmd;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| h. peter anvin | h. peter anvin | 163 | 60.15% | 2 | 28.57% |
| yinghai lu | yinghai lu | 76 | 28.04% | 1 | 14.29% |
| alexander kuleshov | alexander kuleshov | 24 | 8.86% | 2 | 28.57% |
| vivek goyal | vivek goyal | 7 | 2.58% | 1 | 14.29% |
| andrey ryabinin | andrey ryabinin | 1 | 0.37% | 1 | 14.29% |
| Total | 271 | 100.00% | 7 | 100.00% |
/* Don't add a printk in there. printk relies on the PDA which is not initialized
yet. */
static void __init clear_bss(void)
{
memset(__bss_start, 0,
(unsigned long) __bss_stop - (unsigned long) __bss_start);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andi kleen | andi kleen | 28 | 100.00% | 2 | 100.00% |
| Total | 28 | 100.00% | 2 | 100.00% |
static unsigned long get_cmd_line_ptr(void)
{
unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
cmd_line_ptr |= (u64)boot_params.ext_cmd_line_ptr << 32;
return cmd_line_ptr;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yinghai lu | yinghai lu | 33 | 100.00% | 2 | 100.00% |
| Total | 33 | 100.00% | 2 | 100.00% |
static void __init copy_bootdata(char *real_mode_data)
{
char * command_line;
unsigned long cmd_line_ptr;
memcpy(&boot_params, real_mode_data, sizeof boot_params);
sanitize_boot_params(&boot_params);
cmd_line_ptr = get_cmd_line_ptr();
if (cmd_line_ptr) {
command_line = __va(cmd_line_ptr);
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andi kleen | andi kleen | 39 | 61.90% | 2 | 28.57% |
| h. peter anvin | h. peter anvin | 13 | 20.63% | 2 | 28.57% |
| yinghai lu | yinghai lu | 9 | 14.29% | 1 | 14.29% |
| alon bar-lev | alon bar-lev | 1 | 1.59% | 1 | 14.29% |
| vivek goyal | vivek goyal | 1 | 1.59% | 1 | 14.29% |
| Total | 63 | 100.00% | 7 | 100.00% |
asmlinkage __visible void __init x86_64_start_kernel(char * real_mode_data)
{
int i;
/*
* Build-time sanity checks on the kernel image and module
* area mappings. (these are purely build-time and produce no code)
*/
BUILD_BUG_ON(MODULES_VADDR < __START_KERNEL_map);
BUILD_BUG_ON(MODULES_VADDR - __START_KERNEL_map < KERNEL_IMAGE_SIZE);
BUILD_BUG_ON(MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE);
BUILD_BUG_ON((__START_KERNEL_map & ~PMD_MASK) != 0);
BUILD_BUG_ON((MODULES_VADDR & ~PMD_MASK) != 0);
BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
(__START_KERNEL & PGDIR_MASK)));
BUILD_BUG_ON(__fix_to_virt(__end_of_fixed_addresses) <= MODULES_END);
cr4_init_shadow();
/* Kill off the identity-map trampoline */
reset_early_page_tables();
clear_bss();
clear_page(init_level4_pgt);
kasan_early_init();
for (i = 0; i < NUM_EXCEPTION_VECTORS; i++)
set_intr_gate(i, early_idt_handler_array[i]);
load_idt((const struct desc_ptr *)&idt_descr);
copy_bootdata(__va(real_mode_data));
/*
* Load microcode early on BSP.
*/
load_ucode_bsp();
/* set init_level4_pgt kernel high mapping*/
init_level4_pgt[511] = early_level4_pgt[511];
x86_64_start_reservations(real_mode_data);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ingo molnar | ingo molnar | 81 | 42.63% | 1 | 5.00% |
| andi kleen | andi kleen | 33 | 17.37% | 5 | 25.00% |
| h. peter anvin | h. peter anvin | 14 | 7.37% | 1 | 5.00% |
| glauber de oliveira costa | glauber de oliveira costa | 12 | 6.32% | 1 | 5.00% |
| yinghai lu | yinghai lu | 10 | 5.26% | 2 | 10.00% |
| jan beulich | jan beulich | 10 | 5.26% | 1 | 5.00% |
| jeremy fitzhardinge | jeremy fitzhardinge | 6 | 3.16% | 1 | 5.00% |
| andrey ryabinin | andrey ryabinin | 5 | 2.63% | 1 | 5.00% |
| andy lutomirski | andy lutomirski | 4 | 2.11% | 2 | 10.00% |
| fenghua yu | fenghua yu | 4 | 2.11% | 1 | 5.00% |
| roland mcgrath | roland mcgrath | 3 | 1.58% | 1 | 5.00% |
| borislav petkov | borislav petkov | 3 | 1.58% | 1 | 5.00% |
| alexander popov | alexander popov | 3 | 1.58% | 1 | 5.00% |
| vivek goyal | vivek goyal | 2 | 1.05% | 1 | 5.00% |
| Total | 190 | 100.00% | 20 | 100.00% |
void __init x86_64_start_reservations(char *real_mode_data)
{
/* version is always not zero if it is copied */
if (!boot_params.hdr.version)
copy_bootdata(__va(real_mode_data));
x86_early_init_platform_quirks();
switch (boot_params.hdr.hardware_subarch) {
case X86_SUBARCH_INTEL_MID:
x86_intel_mid_early_setup();
break;
default:
break;
}
start_kernel();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andy shevchenko | andy shevchenko | 19 | 35.85% | 1 | 16.67% |
| yinghai lu | yinghai lu | 10 | 18.87% | 1 | 16.67% |
| andi kleen | andi kleen | 9 | 16.98% | 1 | 16.67% |
| jeremy fitzhardinge | jeremy fitzhardinge | 9 | 16.98% | 1 | 16.67% |
| luis r. rodriguez | luis r. rodriguez | 3 | 5.66% | 1 | 16.67% |
| vivek goyal | vivek goyal | 3 | 5.66% | 1 | 16.67% |
| Total | 53 | 100.00% | 6 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| h. peter anvin | h. peter anvin | 249 | 31.60% | 4 | 8.70% |
| andi kleen | andi kleen | 148 | 18.78% | 9 | 19.57% |
| yinghai lu | yinghai lu | 141 | 17.89% | 6 | 13.04% |
| ingo molnar | ingo molnar | 81 | 10.28% | 1 | 2.17% |
| alexander kuleshov | alexander kuleshov | 37 | 4.70% | 2 | 4.35% |
| vivek goyal | vivek goyal | 25 | 3.17% | 2 | 4.35% |
| andy shevchenko | andy shevchenko | 19 | 2.41% | 1 | 2.17% |
| jeremy fitzhardinge | jeremy fitzhardinge | 15 | 1.90% | 1 | 2.17% |
| glauber de oliveira costa | glauber de oliveira costa | 12 | 1.52% | 1 | 2.17% |
| jan beulich | jan beulich | 10 | 1.27% | 1 | 2.17% |
| andrey ryabinin | andrey ryabinin | 10 | 1.27% | 2 | 4.35% |
| thomas gleixner | thomas gleixner | 7 | 0.89% | 3 | 6.52% |
| fenghua yu | fenghua yu | 7 | 0.89% | 1 | 2.17% |
| andy lutomirski | andy lutomirski | 4 | 0.51% | 2 | 4.35% |
| luis r. rodriguez | luis r. rodriguez | 3 | 0.38% | 1 | 2.17% |
| alexander popov | alexander popov | 3 | 0.38% | 1 | 2.17% |
| roland mcgrath | roland mcgrath | 3 | 0.38% | 1 | 2.17% |
| huang ying | huang ying | 3 | 0.38% | 1 | 2.17% |
| suresh siddha | suresh siddha | 3 | 0.38% | 1 | 2.17% |
| borislav petkov | borislav petkov | 3 | 0.38% | 1 | 2.17% |
| akinobu mita | akinobu mita | 2 | 0.25% | 1 | 2.17% |
| russell king | russell king | 1 | 0.13% | 1 | 2.17% |
| alon bar-lev | alon bar-lev | 1 | 0.13% | 1 | 2.17% |
| dave jones | dave jones | 1 | 0.13% | 1 | 2.17% |
| Total | 788 | 100.00% | 46 | 100.00% |
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