cregit-Linux how code gets into the kernel

Release 4.11 arch/powerpc/mm/pgtable-book3s64.c

Directory: arch/powerpc/mm
/*
 * Copyright 2015-2016, Aneesh Kumar K.V, IBM Corporation.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/sched.h>
#include <linux/mm_types.h>

#include <asm/pgalloc.h>
#include <asm/tlb.h>

#include "mmu_decl.h"
#include <trace/events/thp.h>


int (*register_process_table)(unsigned long base, unsigned long page_size,
			      unsigned long tbl_size);

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
/*
 * This is called when relaxing access to a hugepage. It's also called in the page
 * fault path when we don't hit any of the major fault cases, ie, a minor
 * update of _PAGE_ACCESSED, _PAGE_DIRTY, etc... The generic code will have
 * handled those two for us, we additionally deal with missing execute
 * permission here on some processors
 */

int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp, pmd_t entry, int dirty) { int changed; #ifdef CONFIG_DEBUG_VM WARN_ON(!pmd_trans_huge(*pmdp)); assert_spin_locked(&vma->vm_mm->page_table_lock); #endif changed = !pmd_same(*(pmdp), entry); if (changed) { __ptep_set_access_flags(vma->vm_mm, pmdp_ptep(pmdp), pmd_pte(entry), address); flush_pmd_tlb_range(vma, address, address + HPAGE_PMD_SIZE); } return changed; }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V104100.00%5100.00%
Total104100.00%5100.00%


int pmdp_test_and_clear_young(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp) { return __pmdp_test_and_clear_young(vma->vm_mm, address, pmdp); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V30100.00%1100.00%
Total30100.00%1100.00%

/* * set a new huge pmd. We should not be called for updating * an existing pmd entry. That should go via pmd_hugepage_update. */
void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { #ifdef CONFIG_DEBUG_VM WARN_ON(pte_present(pmd_pte(*pmdp)) && !pte_protnone(pmd_pte(*pmdp))); assert_spin_locked(&mm->page_table_lock); WARN_ON(!pmd_trans_huge(pmd)); #endif trace_hugepage_set_pmd(addr, pmd_val(pmd)); return set_pte_at(mm, addr, pmdp_ptep(pmdp), pmd_pte(pmd)); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V93100.00%1100.00%
Total93100.00%1100.00%

/* * We use this to invalidate a pmdp entry before switching from a * hugepte to regular pmd entry. */
void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp) { pmd_hugepage_update(vma->vm_mm, address, pmdp, _PAGE_PRESENT, 0); flush_pmd_tlb_range(vma, address, address + HPAGE_PMD_SIZE); /* * This ensures that generic code that rely on IRQ disabling * to prevent a parallel THP split work as expected. */ kick_all_cpus_sync(); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V48100.00%3100.00%
Total48100.00%3100.00%


static pmd_t pmd_set_protbits(pmd_t pmd, pgprot_t pgprot) { return __pmd(pmd_val(pmd) | pgprot_val(pgprot)); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V26100.00%1100.00%
Total26100.00%1100.00%


pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot) { unsigned long pmdv; pmdv = (pfn << PAGE_SHIFT) & PTE_RPN_MASK; return pmd_set_protbits(__pmd(pmdv), pgprot); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V37100.00%1100.00%
Total37100.00%1100.00%


pmd_t mk_pmd(struct page *page, pgprot_t pgprot) { return pfn_pmd(page_to_pfn(page), pgprot); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V24100.00%1100.00%
Total24100.00%1100.00%


pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) { unsigned long pmdv; pmdv = pmd_val(pmd); pmdv &= _HPAGE_CHG_MASK; return pmd_set_protbits(__pmd(pmdv), newprot); }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V37100.00%1100.00%
Total37100.00%1100.00%

/* * This is called at the end of handling a user page fault, when the * fault has been handled by updating a HUGE PMD entry in the linux page tables. * We use it to preload an HPTE into the hash table corresponding to * the updated linux HUGE PMD entry. */
void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd) { return; }

Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V19100.00%1100.00%
Total19100.00%1100.00%

#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ /* For use by kexec */
void mmu_cleanup_all(void) { if (radix_enabled()) radix__mmu_cleanup_all(); else if (mmu_hash_ops.hpte_clear_all) mmu_hash_ops.hpte_clear_all(); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt27100.00%1100.00%
Total27100.00%1100.00%

#ifdef CONFIG_MEMORY_HOTPLUG
int create_section_mapping(unsigned long start, unsigned long end) { if (radix_enabled()) return radix__create_section_mapping(start, end); return hash__create_section_mapping(start, end); }

Contributors

PersonTokensPropCommitsCommitProp
Reza Arbab34100.00%2100.00%
Total34100.00%2100.00%


int remove_section_mapping(unsigned long start, unsigned long end) { if (radix_enabled()) return radix__remove_section_mapping(start, end); return hash__remove_section_mapping(start, end); }

Contributors

PersonTokensPropCommitsCommitProp
Reza Arbab34100.00%2100.00%
Total34100.00%2100.00%

#endif /* CONFIG_MEMORY_HOTPLUG */

Overall Contributors

PersonTokensPropCommitsCommitProp
Aneesh Kumar K.V44478.17%650.00%
Reza Arbab7413.03%325.00%
Benjamin Herrenschmidt284.93%18.33%
Michael Ellerman193.35%18.33%
Ingo Molnar30.53%18.33%
Total568100.00%12100.00%
Directory: arch/powerpc/mm
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.