mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Matthew Wilcox (Oracle)](/assets/img/avatar_default.png)
Match folio_undo_large_rmappable(), and move the casting from page to folio into the callers (which they were largely doing anyway). Link: https://lkml.kernel.org/r/20230816151201.3655946-6-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com> Cc: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
415 lines
12 KiB
C
415 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_HUGE_MM_H
|
|
#define _LINUX_HUGE_MM_H
|
|
|
|
#include <linux/sched/coredump.h>
|
|
#include <linux/mm_types.h>
|
|
|
|
#include <linux/fs.h> /* only for vma_is_dax() */
|
|
|
|
vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf);
|
|
int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm,
|
|
pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr,
|
|
struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma);
|
|
void huge_pmd_set_accessed(struct vm_fault *vmf);
|
|
int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm,
|
|
pud_t *dst_pud, pud_t *src_pud, unsigned long addr,
|
|
struct vm_area_struct *vma);
|
|
|
|
#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
|
|
void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud);
|
|
#else
|
|
static inline void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
vm_fault_t do_huge_pmd_wp_page(struct vm_fault *vmf);
|
|
bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
|
|
pmd_t *pmd, unsigned long addr, unsigned long next);
|
|
int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd,
|
|
unsigned long addr);
|
|
int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma, pud_t *pud,
|
|
unsigned long addr);
|
|
bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr,
|
|
unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd);
|
|
int change_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
|
|
pmd_t *pmd, unsigned long addr, pgprot_t newprot,
|
|
unsigned long cp_flags);
|
|
|
|
vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, bool write);
|
|
vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, bool write);
|
|
|
|
enum transparent_hugepage_flag {
|
|
TRANSPARENT_HUGEPAGE_UNSUPPORTED,
|
|
TRANSPARENT_HUGEPAGE_FLAG,
|
|
TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
|
|
TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG,
|
|
TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG,
|
|
TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG,
|
|
TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
|
|
TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG,
|
|
TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG,
|
|
};
|
|
|
|
struct kobject;
|
|
struct kobj_attribute;
|
|
|
|
ssize_t single_hugepage_flag_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
const char *buf, size_t count,
|
|
enum transparent_hugepage_flag flag);
|
|
ssize_t single_hugepage_flag_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf,
|
|
enum transparent_hugepage_flag flag);
|
|
extern struct kobj_attribute shmem_enabled_attr;
|
|
|
|
#define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
|
|
#define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER)
|
|
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
#define HPAGE_PMD_SHIFT PMD_SHIFT
|
|
#define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT)
|
|
#define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1))
|
|
|
|
#define HPAGE_PUD_SHIFT PUD_SHIFT
|
|
#define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT)
|
|
#define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1))
|
|
|
|
extern unsigned long transparent_hugepage_flags;
|
|
|
|
#define hugepage_flags_enabled() \
|
|
(transparent_hugepage_flags & \
|
|
((1<<TRANSPARENT_HUGEPAGE_FLAG) | \
|
|
(1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)))
|
|
#define hugepage_flags_always() \
|
|
(transparent_hugepage_flags & \
|
|
(1<<TRANSPARENT_HUGEPAGE_FLAG))
|
|
|
|
/*
|
|
* Do the below checks:
|
|
* - For file vma, check if the linear page offset of vma is
|
|
* HPAGE_PMD_NR aligned within the file. The hugepage is
|
|
* guaranteed to be hugepage-aligned within the file, but we must
|
|
* check that the PMD-aligned addresses in the VMA map to
|
|
* PMD-aligned offsets within the file, else the hugepage will
|
|
* not be PMD-mappable.
|
|
* - For all vmas, check if the haddr is in an aligned HPAGE_PMD_SIZE
|
|
* area.
|
|
*/
|
|
static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
|
|
unsigned long addr)
|
|
{
|
|
unsigned long haddr;
|
|
|
|
/* Don't have to check pgoff for anonymous vma */
|
|
if (!vma_is_anonymous(vma)) {
|
|
if (!IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - vma->vm_pgoff,
|
|
HPAGE_PMD_NR))
|
|
return false;
|
|
}
|
|
|
|
haddr = addr & HPAGE_PMD_MASK;
|
|
|
|
if (haddr < vma->vm_start || haddr + HPAGE_PMD_SIZE > vma->vm_end)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static inline bool file_thp_enabled(struct vm_area_struct *vma)
|
|
{
|
|
struct inode *inode;
|
|
|
|
if (!vma->vm_file)
|
|
return false;
|
|
|
|
inode = vma->vm_file->f_inode;
|
|
|
|
return (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS)) &&
|
|
(vma->vm_flags & VM_EXEC) &&
|
|
!inode_is_open_for_write(inode) && S_ISREG(inode->i_mode);
|
|
}
|
|
|
|
bool hugepage_vma_check(struct vm_area_struct *vma, unsigned long vm_flags,
|
|
bool smaps, bool in_pf, bool enforce_sysfs);
|
|
|
|
#define transparent_hugepage_use_zero_page() \
|
|
(transparent_hugepage_flags & \
|
|
(1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG))
|
|
|
|
unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr,
|
|
unsigned long len, unsigned long pgoff, unsigned long flags);
|
|
|
|
void folio_prep_large_rmappable(struct folio *folio);
|
|
bool can_split_folio(struct folio *folio, int *pextra_pins);
|
|
int split_huge_page_to_list(struct page *page, struct list_head *list);
|
|
static inline int split_huge_page(struct page *page)
|
|
{
|
|
return split_huge_page_to_list(page, NULL);
|
|
}
|
|
void deferred_split_folio(struct folio *folio);
|
|
|
|
void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
|
|
unsigned long address, bool freeze, struct folio *folio);
|
|
|
|
#define split_huge_pmd(__vma, __pmd, __address) \
|
|
do { \
|
|
pmd_t *____pmd = (__pmd); \
|
|
if (is_swap_pmd(*____pmd) || pmd_trans_huge(*____pmd) \
|
|
|| pmd_devmap(*____pmd)) \
|
|
__split_huge_pmd(__vma, __pmd, __address, \
|
|
false, NULL); \
|
|
} while (0)
|
|
|
|
|
|
void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address,
|
|
bool freeze, struct folio *folio);
|
|
|
|
void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud,
|
|
unsigned long address);
|
|
|
|
#define split_huge_pud(__vma, __pud, __address) \
|
|
do { \
|
|
pud_t *____pud = (__pud); \
|
|
if (pud_trans_huge(*____pud) \
|
|
|| pud_devmap(*____pud)) \
|
|
__split_huge_pud(__vma, __pud, __address); \
|
|
} while (0)
|
|
|
|
int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags,
|
|
int advice);
|
|
int madvise_collapse(struct vm_area_struct *vma,
|
|
struct vm_area_struct **prev,
|
|
unsigned long start, unsigned long end);
|
|
void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start,
|
|
unsigned long end, long adjust_next);
|
|
spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma);
|
|
spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma);
|
|
|
|
static inline int is_swap_pmd(pmd_t pmd)
|
|
{
|
|
return !pmd_none(pmd) && !pmd_present(pmd);
|
|
}
|
|
|
|
/* mmap_lock must be held on entry */
|
|
static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd))
|
|
return __pmd_trans_huge_lock(pmd, vma);
|
|
else
|
|
return NULL;
|
|
}
|
|
static inline spinlock_t *pud_trans_huge_lock(pud_t *pud,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
if (pud_trans_huge(*pud) || pud_devmap(*pud))
|
|
return __pud_trans_huge_lock(pud, vma);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* folio_test_pmd_mappable - Can we map this folio with a PMD?
|
|
* @folio: The folio to test
|
|
*/
|
|
static inline bool folio_test_pmd_mappable(struct folio *folio)
|
|
{
|
|
return folio_order(folio) >= HPAGE_PMD_ORDER;
|
|
}
|
|
|
|
struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr,
|
|
pmd_t *pmd, int flags, struct dev_pagemap **pgmap);
|
|
struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr,
|
|
pud_t *pud, int flags, struct dev_pagemap **pgmap);
|
|
|
|
vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf);
|
|
|
|
extern struct page *huge_zero_page;
|
|
extern unsigned long huge_zero_pfn;
|
|
|
|
static inline bool is_huge_zero_page(struct page *page)
|
|
{
|
|
return READ_ONCE(huge_zero_page) == page;
|
|
}
|
|
|
|
static inline bool is_huge_zero_pmd(pmd_t pmd)
|
|
{
|
|
return pmd_present(pmd) && READ_ONCE(huge_zero_pfn) == pmd_pfn(pmd);
|
|
}
|
|
|
|
static inline bool is_huge_zero_pud(pud_t pud)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
struct page *mm_get_huge_zero_page(struct mm_struct *mm);
|
|
void mm_put_huge_zero_page(struct mm_struct *mm);
|
|
|
|
#define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot))
|
|
|
|
static inline bool thp_migration_supported(void)
|
|
{
|
|
return IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION);
|
|
}
|
|
|
|
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
|
#define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
|
|
#define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; })
|
|
#define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
|
|
|
|
#define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; })
|
|
#define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; })
|
|
#define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; })
|
|
|
|
static inline bool folio_test_pmd_mappable(struct folio *folio)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
|
|
unsigned long addr)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool hugepage_vma_check(struct vm_area_struct *vma,
|
|
unsigned long vm_flags, bool smaps,
|
|
bool in_pf, bool enforce_sysfs)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void folio_prep_large_rmappable(struct folio *folio) {}
|
|
|
|
#define transparent_hugepage_flags 0UL
|
|
|
|
#define thp_get_unmapped_area NULL
|
|
|
|
static inline bool
|
|
can_split_folio(struct folio *folio, int *pextra_pins)
|
|
{
|
|
return false;
|
|
}
|
|
static inline int
|
|
split_huge_page_to_list(struct page *page, struct list_head *list)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int split_huge_page(struct page *page)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void deferred_split_folio(struct folio *folio) {}
|
|
#define split_huge_pmd(__vma, __pmd, __address) \
|
|
do { } while (0)
|
|
|
|
static inline void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
|
|
unsigned long address, bool freeze, struct folio *folio) {}
|
|
static inline void split_huge_pmd_address(struct vm_area_struct *vma,
|
|
unsigned long address, bool freeze, struct folio *folio) {}
|
|
|
|
#define split_huge_pud(__vma, __pmd, __address) \
|
|
do { } while (0)
|
|
|
|
static inline int hugepage_madvise(struct vm_area_struct *vma,
|
|
unsigned long *vm_flags, int advice)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int madvise_collapse(struct vm_area_struct *vma,
|
|
struct vm_area_struct **prev,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
|
|
unsigned long start,
|
|
unsigned long end,
|
|
long adjust_next)
|
|
{
|
|
}
|
|
static inline int is_swap_pmd(pmd_t pmd)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline spinlock_t *pud_trans_huge_lock(pud_t *pud,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool is_huge_zero_page(struct page *page)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool is_huge_zero_pmd(pmd_t pmd)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool is_huge_zero_pud(pud_t pud)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void mm_put_huge_zero_page(struct mm_struct *mm)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma,
|
|
unsigned long addr, pmd_t *pmd, int flags, struct dev_pagemap **pgmap)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct page *follow_devmap_pud(struct vm_area_struct *vma,
|
|
unsigned long addr, pud_t *pud, int flags, struct dev_pagemap **pgmap)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool thp_migration_supported(void)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
|
|
|
static inline int split_folio_to_list(struct folio *folio,
|
|
struct list_head *list)
|
|
{
|
|
return split_huge_page_to_list(&folio->page, list);
|
|
}
|
|
|
|
static inline int split_folio(struct folio *folio)
|
|
{
|
|
return split_folio_to_list(folio, NULL);
|
|
}
|
|
|
|
/*
|
|
* archs that select ARCH_WANTS_THP_SWAP but don't support THP_SWP due to
|
|
* limitations in the implementation like arm64 MTE can override this to
|
|
* false
|
|
*/
|
|
#ifndef arch_thp_swp_supported
|
|
static inline bool arch_thp_swp_supported(void)
|
|
{
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_HUGE_MM_H */
|