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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_X86_PGALLOC_H#define _ASM_X86_PGALLOC_H
#include <linux/threads.h>#include <linux/mm.h> /* for struct page */#include <linux/pagemap.h>
#include <asm/cpufeature.h>
#define __HAVE_ARCH_PTE_ALLOC_ONE#define __HAVE_ARCH_PGD_FREE#include <asm-generic/pgalloc.h>
static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
#ifdef CONFIG_PARAVIRT_XXL#include <asm/paravirt.h>#else#define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm)static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count) {}static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn) {}static inline void paravirt_release_pte(unsigned long pfn) {}static inline void paravirt_release_pmd(unsigned long pfn) {}static inline void paravirt_release_pud(unsigned long pfn) {}static inline void paravirt_release_p4d(unsigned long pfn) {}#endif
/* * In case of Page Table Isolation active, we acquire two PGDs instead of one. * Being order-1, it is both 8k in size and 8k-aligned. That lets us just * flip bit 12 in a pointer to swap between the two 4k halves. */static inline unsigned int pgd_allocation_order(void){ if (cpu_feature_enabled(X86_FEATURE_PTI)) return 1; return 0;}
/* * Allocate and free page tables. */extern pgd_t *pgd_alloc(struct mm_struct *);extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
extern pgtable_t pte_alloc_one(struct mm_struct *);
extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte, unsigned long address){ ___pte_free_tlb(tlb, pte);}
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte){ paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));}
static inline void pmd_populate_kernel_safe(struct mm_struct *mm, pmd_t *pmd, pte_t *pte){ paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); set_pmd_safe(pmd, __pmd(__pa(pte) | _PAGE_TABLE));}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte){ unsigned long pfn = page_to_pfn(pte);
paravirt_alloc_pte(mm, pfn); set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));}
#if CONFIG_PGTABLE_LEVELS > 2extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, unsigned long address){ ___pmd_free_tlb(tlb, pmd);}
#ifdef CONFIG_X86_PAEextern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);#else /* !CONFIG_X86_PAE */static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd){ paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));}
static inline void pud_populate_safe(struct mm_struct *mm, pud_t *pud, pmd_t *pmd){ paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); set_pud_safe(pud, __pud(_PAGE_TABLE | __pa(pmd)));}#endif /* CONFIG_X86_PAE */
#if CONFIG_PGTABLE_LEVELS > 3static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud){ paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); set_p4d(p4d, __p4d(_PAGE_TABLE | __pa(pud)));}
static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d, pud_t *pud){ paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); set_p4d_safe(p4d, __p4d(_PAGE_TABLE | __pa(pud)));}
extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, unsigned long address){ ___pud_free_tlb(tlb, pud);}
#if CONFIG_PGTABLE_LEVELS > 4static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d){ if (!pgtable_l5_enabled()) return; paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT); set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));}
static inline void pgd_populate_safe(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d){ if (!pgtable_l5_enabled()) return; paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT); set_pgd_safe(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));}
extern void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d);
static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d, unsigned long address){ if (pgtable_l5_enabled()) ___p4d_free_tlb(tlb, p4d);}
#endif /* CONFIG_PGTABLE_LEVELS > 4 */#endif /* CONFIG_PGTABLE_LEVELS > 3 */#endif /* CONFIG_PGTABLE_LEVELS > 2 */
#endif /* _ASM_X86_PGALLOC_H */