162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#include <stdint.h> 362306a36Sopenharmony_ci#include <stdbool.h> 462306a36Sopenharmony_ci#include <sys/mman.h> 562306a36Sopenharmony_ci#include <err.h> 662306a36Sopenharmony_ci#include <string.h> /* ffsl() */ 762306a36Sopenharmony_ci#include <unistd.h> /* _SC_PAGESIZE */ 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#define BIT_ULL(nr) (1ULL << (nr)) 1062306a36Sopenharmony_ci#define PM_SOFT_DIRTY BIT_ULL(55) 1162306a36Sopenharmony_ci#define PM_MMAP_EXCLUSIVE BIT_ULL(56) 1262306a36Sopenharmony_ci#define PM_UFFD_WP BIT_ULL(57) 1362306a36Sopenharmony_ci#define PM_FILE BIT_ULL(61) 1462306a36Sopenharmony_ci#define PM_SWAP BIT_ULL(62) 1562306a36Sopenharmony_ci#define PM_PRESENT BIT_ULL(63) 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ciextern unsigned int __page_size; 1862306a36Sopenharmony_ciextern unsigned int __page_shift; 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_cistatic inline unsigned int psize(void) 2162306a36Sopenharmony_ci{ 2262306a36Sopenharmony_ci if (!__page_size) 2362306a36Sopenharmony_ci __page_size = sysconf(_SC_PAGESIZE); 2462306a36Sopenharmony_ci return __page_size; 2562306a36Sopenharmony_ci} 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_cistatic inline unsigned int pshift(void) 2862306a36Sopenharmony_ci{ 2962306a36Sopenharmony_ci if (!__page_shift) 3062306a36Sopenharmony_ci __page_shift = (ffsl(psize()) - 1); 3162306a36Sopenharmony_ci return __page_shift; 3262306a36Sopenharmony_ci} 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ciuint64_t pagemap_get_entry(int fd, char *start); 3562306a36Sopenharmony_cibool pagemap_is_softdirty(int fd, char *start); 3662306a36Sopenharmony_cibool pagemap_is_swapped(int fd, char *start); 3762306a36Sopenharmony_cibool pagemap_is_populated(int fd, char *start); 3862306a36Sopenharmony_ciunsigned long pagemap_get_pfn(int fd, char *start); 3962306a36Sopenharmony_civoid clear_softdirty(void); 4062306a36Sopenharmony_cibool check_for_pattern(FILE *fp, const char *pattern, char *buf, size_t len); 4162306a36Sopenharmony_ciuint64_t read_pmd_pagesize(void); 4262306a36Sopenharmony_cibool check_huge_anon(void *addr, int nr_hpages, uint64_t hpage_size); 4362306a36Sopenharmony_cibool check_huge_file(void *addr, int nr_hpages, uint64_t hpage_size); 4462306a36Sopenharmony_cibool check_huge_shmem(void *addr, int nr_hpages, uint64_t hpage_size); 4562306a36Sopenharmony_ciint64_t allocate_transhuge(void *ptr, int pagemap_fd); 4662306a36Sopenharmony_ciunsigned long default_huge_page_size(void); 4762306a36Sopenharmony_ciint detect_hugetlb_page_sizes(size_t sizes[], int max); 4862306a36Sopenharmony_ci 4962306a36Sopenharmony_ciint uffd_register(int uffd, void *addr, uint64_t len, 5062306a36Sopenharmony_ci bool miss, bool wp, bool minor); 5162306a36Sopenharmony_ciint uffd_unregister(int uffd, void *addr, uint64_t len); 5262306a36Sopenharmony_ciint uffd_register_with_ioctls(int uffd, void *addr, uint64_t len, 5362306a36Sopenharmony_ci bool miss, bool wp, bool minor, uint64_t *ioctls); 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ci/* 5662306a36Sopenharmony_ci * On ppc64 this will only work with radix 2M hugepage size 5762306a36Sopenharmony_ci */ 5862306a36Sopenharmony_ci#define HPAGE_SHIFT 21 5962306a36Sopenharmony_ci#define HPAGE_SIZE (1 << HPAGE_SHIFT) 6062306a36Sopenharmony_ci 6162306a36Sopenharmony_ci#define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0) 6262306a36Sopenharmony_ci#define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1)) 63