cregit-Linux how code gets into the kernel

Release 4.8 arch/powerpc/include/asm/nohash/32/pgalloc.h

#ifndef _ASM_POWERPC_PGALLOC_32_H

#define _ASM_POWERPC_PGALLOC_32_H

#include <linux/threads.h>

/* For 32-bit, all levels of page tables are just drawn from get_free_page() */

#define MAX_PGTABLE_INDEX_SIZE	0

extern void __bad_pte(pmd_t *pmd);

extern pgd_t *pgd_alloc(struct mm_struct *mm);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);

/*
 * We don't have any real pmd's, and this code never triggers because
 * the pgd will always be present..
 */
/* #define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); }) */

#define pmd_free(mm, x) 		do { } while (0)

#define __pmd_free_tlb(tlb,x,a)		do { } while (0)
/* #define pgd_populate(mm, pmd, pte)      BUG() */

#ifndef CONFIG_BOOKE


static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *pte) { *pmdp = __pmd(__pa(pte) | _PMD_PRESENT); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar2678.79%150.00%
david gibsondavid gibson721.21%150.00%
Total33100.00%2100.00%


static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t pte_page) { *pmdp = __pmd((page_to_pfn(pte_page) << PAGE_SHIFT) | _PMD_PRESENT); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar3083.33%150.00%
david gibsondavid gibson616.67%150.00%
Total36100.00%2100.00%

#define pmd_pgtable(pmd) pmd_page(pmd) #else
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *pte) { *pmdp = __pmd((unsigned long)pte | _PMD_PRESENT); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar2779.41%150.00%
david gibsondavid gibson720.59%150.00%
Total34100.00%2100.00%


static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t pte_page) { *pmdp = __pmd((unsigned long)lowmem_page_address(pte_page) | _PMD_PRESENT); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar3083.33%150.00%
david gibsondavid gibson616.67%150.00%
Total36100.00%2100.00%

#define pmd_pgtable(pmd) pmd_page(pmd) #endif extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr); extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { free_page((unsigned long)pte); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar25100.00%1100.00%
Total25100.00%1100.00%


static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) { pgtable_page_dtor(ptepage); __free_page(ptepage); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar25100.00%1100.00%
Total25100.00%1100.00%


static inline void pgtable_free(void *table, unsigned index_size) { BUG_ON(index_size); /* 32-bit doesn't use this */ free_page((unsigned long)table); }

Contributors

PersonTokensPropCommitsCommitProp
david gibsondavid gibson1655.17%250.00%
kumar galakumar gala1241.38%125.00%
benjamin herrenschmidtbenjamin herrenschmidt13.45%125.00%
Total29100.00%4100.00%

#define check_pgt_cache() do { } while (0) #ifdef CONFIG_SMP
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift) { unsigned long pgf = (unsigned long)table; BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); pgf |= shift; tlb_remove_table(tlb, (void *)pgf); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar51100.00%1100.00%
Total51100.00%1100.00%


static inline void __tlb_remove_table(void *_table) { void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; pgtable_free(table, shift); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar48100.00%1100.00%
Total48100.00%1100.00%

#else
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift) { pgtable_free(table, shift); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar26100.00%1100.00%
Total26100.00%1100.00%

#endif
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, unsigned long address) { tlb_flush_pgtable(tlb, address); pgtable_page_dtor(table); pgtable_free_tlb(tlb, page_address(table), 0); }

Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar3888.37%150.00%
hong h. phamhong h. pham511.63%150.00%
Total43100.00%2100.00%

#endif /* _ASM_POWERPC_PGALLOC_32_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
aneesh kumaraneesh kumar33363.79%220.00%
david gibsondavid gibson14427.59%330.00%
martin schwidefskymartin schwidefsky152.87%110.00%
kumar galakumar gala152.87%110.00%
benjamin herrenschmidtbenjamin herrenschmidt101.92%220.00%
hong h. phamhong h. pham50.96%110.00%
Total522100.00%10100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.