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394ad21319
commit0389c305efupstream. The madv_populate and soft-dirty kselftests currently fail on systems where CONFIG_MEM_SOFT_DIRTY is disabled. Introduce a new helper softdirty_supported() into vm_util.c/h to ensure tests are properly skipped when the feature is not enabled. Link: https://lkml.kernel.org/r/20250917133137.62802-1-lance.yang@linux.dev Fixes:9f3265db6a("selftests: vm: add test for Soft-Dirty PTE bit") Signed-off-by: Lance Yang <lance.yang@linux.dev> Acked-by: David Hildenbrand <david@redhat.com> Suggested-by: David Hildenbrand <david@redhat.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Gabriel Krisman Bertazi <krisman@collabora.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <stdint.h>
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#include <stdbool.h>
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#include <sys/mman.h>
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#include <err.h>
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#include <strings.h> /* ffsl() */
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#include <unistd.h> /* _SC_PAGESIZE */
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#define BIT_ULL(nr) (1ULL << (nr))
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#define PM_SOFT_DIRTY BIT_ULL(55)
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#define PM_MMAP_EXCLUSIVE BIT_ULL(56)
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#define PM_UFFD_WP BIT_ULL(57)
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#define PM_FILE BIT_ULL(61)
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#define PM_SWAP BIT_ULL(62)
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#define PM_PRESENT BIT_ULL(63)
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extern unsigned int __page_size;
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extern unsigned int __page_shift;
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static inline unsigned int psize(void)
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{
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if (!__page_size)
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__page_size = sysconf(_SC_PAGESIZE);
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return __page_size;
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}
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static inline unsigned int pshift(void)
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{
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if (!__page_shift)
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__page_shift = (ffsl(psize()) - 1);
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return __page_shift;
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}
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uint64_t pagemap_get_entry(int fd, char *start);
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bool pagemap_is_softdirty(int fd, char *start);
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bool pagemap_is_swapped(int fd, char *start);
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bool pagemap_is_populated(int fd, char *start);
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unsigned long pagemap_get_pfn(int fd, char *start);
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void clear_softdirty(void);
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bool check_for_pattern(FILE *fp, const char *pattern, char *buf, size_t len);
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uint64_t read_pmd_pagesize(void);
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unsigned long rss_anon(void);
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bool check_huge_anon(void *addr, int nr_hpages, uint64_t hpage_size);
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bool check_huge_file(void *addr, int nr_hpages, uint64_t hpage_size);
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bool check_huge_shmem(void *addr, int nr_hpages, uint64_t hpage_size);
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int64_t allocate_transhuge(void *ptr, int pagemap_fd);
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unsigned long default_huge_page_size(void);
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int detect_hugetlb_page_sizes(size_t sizes[], int max);
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int uffd_register(int uffd, void *addr, uint64_t len,
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bool miss, bool wp, bool minor);
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int uffd_unregister(int uffd, void *addr, uint64_t len);
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int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len,
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bool miss, bool wp, bool minor, uint64_t *ioctls);
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unsigned long get_free_hugepages(void);
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bool softdirty_supported(void);
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/*
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* On ppc64 this will only work with radix 2M hugepage size
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*/
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#define HPAGE_SHIFT 21
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#define HPAGE_SIZE (1 << HPAGE_SHIFT)
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#define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0)
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#define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1))
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