Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Huacai Chen |
293 |
96.38% |
2 |
50.00% |
| Ming Wang |
10 |
3.29% |
1 |
25.00% |
| Peter Xu |
1 |
0.33% |
1 |
25.00% |
| Total |
304 |
|
4 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/err.h>
#include <linux/sysctl.h>
#include <asm/mman.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pte_t *pte = NULL;
pgd = pgd_offset(mm, addr);
p4d = p4d_alloc(mm, pgd, addr);
pud = pud_alloc(mm, p4d, addr);
if (pud)
pte = (pte_t *)pmd_alloc(mm, pud, addr);
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
unsigned long sz)
{
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd = NULL;
pgd = pgd_offset(mm, addr);
if (pgd_present(pgdp_get(pgd))) {
p4d = p4d_offset(pgd, addr);
if (p4d_present(p4dp_get(p4d))) {
pud = pud_offset(p4d, addr);
if (pud_present(pudp_get(pud)))
pmd = pmd_offset(pud, addr);
}
}
return pmd_none(pmdp_get(pmd)) ? NULL : (pte_t *) pmd;
}
uint64_t pmd_to_entrylo(unsigned long pmd_val)
{
uint64_t val;
/* PMD as PTE. Must be huge page */
if (!pmd_leaf(__pmd(pmd_val)))
panic("%s", __func__);
val = pmd_val ^ _PAGE_HUGE;
val |= ((val & _PAGE_HGLOBAL) >>
(_PAGE_HGLOBAL_SHIFT - _PAGE_GLOBAL_SHIFT));
return val;
}