Contributors: 25
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Andrew Morton |
136 |
23.57% |
8 |
17.78% |
| Yanmin Zhang |
99 |
17.16% |
1 |
2.22% |
| Michel Lespinasse |
73 |
12.65% |
1 |
2.22% |
| Kirill A. Shutemov |
66 |
11.44% |
5 |
11.11% |
| Andi Kleen |
62 |
10.75% |
3 |
6.67% |
| Benjamin Herrenschmidt |
24 |
4.16% |
1 |
2.22% |
| Wolfgang Wander |
18 |
3.12% |
1 |
2.22% |
| Dmitry Safonov |
17 |
2.95% |
2 |
4.44% |
| Mike Kravetz |
15 |
2.60% |
1 |
2.22% |
| Rick Edgecombe |
12 |
2.08% |
2 |
4.44% |
| Borislav Petkov |
8 |
1.39% |
1 |
2.22% |
| Anshuman Khandual |
7 |
1.21% |
2 |
4.44% |
| Linus Torvalds (pre-git) |
6 |
1.04% |
4 |
8.89% |
| Nitin Gupta |
6 |
1.04% |
1 |
2.22% |
| Richard Henderson |
5 |
0.87% |
1 |
2.22% |
| Hugh Dickins |
3 |
0.52% |
1 |
2.22% |
| Michal Hocko |
3 |
0.52% |
1 |
2.22% |
| Alexandre Ghiti |
3 |
0.52% |
1 |
2.22% |
| Ingo Molnar |
3 |
0.52% |
1 |
2.22% |
| Linus Torvalds |
3 |
0.52% |
1 |
2.22% |
| Jeremy Fitzhardinge |
3 |
0.52% |
2 |
4.44% |
| Xiao Guangrong |
2 |
0.35% |
1 |
2.22% |
| Greg Kroah-Hartman |
1 |
0.17% |
1 |
2.22% |
| Vlastimil Babka |
1 |
0.17% |
1 |
2.22% |
| Naoya Horiguchi |
1 |
0.17% |
1 |
2.22% |
| Total |
577 |
|
45 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* IA-32 Huge TLB Page Support for Kernel.
*
* Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
*/
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/sched/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/err.h>
#include <linux/sysctl.h>
#include <linux/compat.h>
#include <asm/mman.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/elf.h>
#ifdef CONFIG_HUGETLB_PAGE
static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
unsigned long addr, unsigned long len,
unsigned long pgoff, unsigned long flags)
{
struct hstate *h = hstate_file(file);
struct vm_unmapped_area_info info = {};
info.length = len;
info.low_limit = get_mmap_base(1);
/*
* If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area
* in the full address space.
*/
info.high_limit = in_32bit_syscall() ?
task_size_32bit() : task_size_64bit(addr > DEFAULT_MAP_WINDOW);
info.align_mask = PAGE_MASK & ~huge_page_mask(h);
return vm_unmapped_area(&info);
}
static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
unsigned long addr, unsigned long len,
unsigned long pgoff, unsigned long flags)
{
struct hstate *h = hstate_file(file);
struct vm_unmapped_area_info info = {};
info.flags = VM_UNMAPPED_AREA_TOPDOWN;
info.length = len;
info.low_limit = PAGE_SIZE;
info.high_limit = get_mmap_base(0);
/*
* If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area
* in the full address space.
*/
if (addr > DEFAULT_MAP_WINDOW && !in_32bit_syscall())
info.high_limit += TASK_SIZE_MAX - DEFAULT_MAP_WINDOW;
info.align_mask = PAGE_MASK & ~huge_page_mask(h);
addr = vm_unmapped_area(&info);
/*
* A failed mmap() very likely causes application failure,
* so fall back to the bottom-up function here. This scenario
* can happen with large stack limits and large mmap()
* allocations.
*/
if (addr & ~PAGE_MASK) {
VM_BUG_ON(addr != -ENOMEM);
info.flags = 0;
info.low_limit = TASK_UNMAPPED_BASE;
info.high_limit = TASK_SIZE_LOW;
addr = vm_unmapped_area(&info);
}
return addr;
}
unsigned long
hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff, unsigned long flags)
{
struct hstate *h = hstate_file(file);
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
if (len & ~huge_page_mask(h))
return -EINVAL;
if (len > TASK_SIZE)
return -ENOMEM;
/* No address checking. See comment at mmap_address_hint_valid() */
if (flags & MAP_FIXED) {
if (prepare_hugepage_range(file, addr, len))
return -EINVAL;
return addr;
}
if (addr) {
addr &= huge_page_mask(h);
if (!mmap_address_hint_valid(addr, len))
goto get_unmapped_area;
vma = find_vma(mm, addr);
if (!vma || addr + len <= vm_start_gap(vma))
return addr;
}
get_unmapped_area:
if (!test_bit(MMF_TOPDOWN, &mm->flags))
return hugetlb_get_unmapped_area_bottomup(file, addr, len,
pgoff, flags);
else
return hugetlb_get_unmapped_area_topdown(file, addr, len,
pgoff, flags);
}
#endif /* CONFIG_HUGETLB_PAGE */
#ifdef CONFIG_X86_64
bool __init arch_hugetlb_valid_size(unsigned long size)
{
if (size == PMD_SIZE)
return true;
else if (size == PUD_SIZE && boot_cpu_has(X86_FEATURE_GBPAGES))
return true;
else
return false;
}
#ifdef CONFIG_CONTIG_ALLOC
static __init int gigantic_pages_init(void)
{
/* With compaction or CMA we can allocate gigantic pages at runtime */
if (boot_cpu_has(X86_FEATURE_GBPAGES))
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
return 0;
}
arch_initcall(gigantic_pages_init);
#endif
#endif