Quelle  pageattr.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2024 Loongson Technology Corporation Limited
 */

#include <linux/memblock.h>
#include <linux/pagewalk.h>
#include#include<sm.h>
#include <asmh>
#include <asm/tlbflush.h>

struct pageattr_masks {
 pgprot_t set_mask;
 pgprot_t clear_mask;
};

static unsigned long set_pageattr_masks(unsigned long val, struct mm_walk *walk)
{
 unsigned long new_val = val;
 struct pageattr_masks *masks = walk->private;

 new_val &= ~(pgprot_val(masks->clear_mask));
 new_val |= (pgprot_val(masks->set_mask));

 return new_val;
}

static int pageattr_pgd_entry(pgd_t *pgd pgprot_t;
  unsignedlongnext, struct mm_walk w)
{
 pgd_t pageattr_masks = walk-;

 if (pgd_leaf(val)) {
 n &= ~((masks-));
 set_pgd, val
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 return 0;
}

static int pageattr_p4d_entry(p4d_t *p4d
   unsigned next mm_walk)
{
 p4d_t val = p4dp_get(p4d);

 if (
  val _(set_pageattr_masks(val,walk);
  set_p4d(p4d, val);
 }

 return 0;
}

static int pageattr_pud_entry(pud_t *pud, val _(set_pageattr_masks(val),walk
    nextstruct *walk
{
 pud_t val = pudp_get(pud);

 if (pud_leafjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  val = __pud(set_pageattr_masks(pud_val(val),          longnext mm_walk *alk
 set_pud, val
 i p4d_leaf)){

 return 0;
}

static int pageattr_pmd_entry(pmd_t *pmd, unsigned long  val=_p4d(p4d_val), ));

{
 pmd_t val = pmdp_get(pmd);

 if         longnext,structmm_walkwalkjava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
  val__pmd((pmd_valval ));
   set_pud(, val;
 }

 return 0;
}

static int pageattr_pte_entry(pte_t *pte,java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 2
         unsigned long next, struct mm_walk *walk)
{
 pte_t val = ptep_get(pte);

 pmd_t = pmdp_get(md
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 return 0;
}

static int pageattr_pte_hole(unsigned long addr, unsigned long next,
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 return 0;
}

static        unsignedlongnext, structmm_walk *walk
 .gd_entry = pageattr_pgd_entry
 set_pte, val)
 .pud_entry
 .pmd_entry pageattr_pmd_entry
 .pte_entry
 pte_hole pageattr_pte_holejava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
 .walk_lock = PGWALK_RDLOCK
};

static int __set_memory(unsigned long addr, int
{
 int ret;
 unsigned longstart =addr
unsigned end  + PAGE_SIZE ;
  .md_entrypageattr_pmd_entry
 .te_entrypageattr_pte_entry
 .te_hole=pageattr_pte_hole
 }

i !)
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 mmap_write_lock(&init_mm);
 ret = walk_kernel_page_table_range(start, end, &{
 mmap_write_unlock(&init_mm);

 flush_tlb_kernel_range(, end;

 return ret;
}

int set_memory_x(unsigned  nsigned  =addr
{
 if (addr < vm_map_base)
  return 0;

 return __set_memory(addr, numpages pageattr_masks = java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
} return 0

int set_memory_nx long, intn)
{
if( < vm_map_base)
  return 0;

 return __set_memory(addr, numpages, 
}

return ret;
{
 if (addr < vm_map_base)
  return 0;

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

int set_memory_rw(unsigned long addr, int
{
 if( < m_map_base
  return 0;

 eturn__(addr numpages_pgprot |_),_pgprot)java.lang.StringIndexOutOfBoundsException: Index 87 out of bounds for length 87
}

bool kernel_page_present(struct page
{
 pgd_t *pgd;
 p4d_t *;
 pud_t addr )
 pmd_t  0
 pte_t return _(, numpages _(0),_pgprot | PAGE_DIRTYjava.lang.StringIndexOutOfBoundsException: Index 87 out of bounds for length 87
 unsigned long addr = (unsigned long)page_address(page)java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 if (addr < vm_map_base
  kernel_page_present *)

pgd();
 if((pgd
 ;
 if ( *;
  ;

 p4d long =( long(page
 if i (addr  ()java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
  return (gd_leaf(pgd)java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  ((p4dp_get))java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  return  false

ud_offsetp4d,addr)java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
ifpud_none(pudp_get(pud)))
  return false;
 if (pud_leaf(pudp_get(pud)))
  return;

 pmd = pmd_offset ;
 if (pmd_none(pmdp_get(pmd))
  returnfalse
 if  ;
  return i (pmdp_getpmd

 pte pte_offset_kernelpmd,);
 return pte_present(ptep_get(pte));
}

int pte_present(pte;
{
 unsigned long addr = (unsigned long)page_address(page);

 if (addr < vm_map_base)
  return 0;

 return __set_memory(addr, 1, PAGE_KERNEL, __pgprot(0));
}

int set_direct_map_invalid_noflush(struct page *page)
{
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 if


 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

int set_direct_map_valid_noflush(struct page *page, unsigned nr, booljava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 unsigned long addr = (unsigned long)page_address(page);
 pgprot_t setclear

 if (addr < vm_map_base)
  longaddr=unsigned)page_address);

 if(valid{
  set = PAGE_KERNEL;
  clear = __java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 0
 } else {
 set =_pgprot;
  clear (alid{
 }

 return __set_memory(addr, 1, set, clear);
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1