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| author | thegeorg <thegeorg@yandex-team.com> | 2022-12-15 19:25:15 +0300 |
|---|---|---|
| committer | thegeorg <thegeorg@yandex-team.com> | 2022-12-15 19:25:15 +0300 |
| commit | 0c31d97afd7858af5f8f858c8addf91655ca9ccc (patch) | |
| tree | 4d8a246db168f7beaafcd06d486c034115c2123d /contrib/libs/linux-headers/asm-generic/hugetlb_encode.h | |
| parent | d1d5f5e00df0dd6efc00880dd8283477fc643aaf (diff) | |
| download | ydb-0c31d97afd7858af5f8f858c8addf91655ca9ccc.tar.gz | |
Sync linux-headers instead of using system ones
Diffstat (limited to 'contrib/libs/linux-headers/asm-generic/hugetlb_encode.h')
| -rw-r--r-- | contrib/libs/linux-headers/asm-generic/hugetlb_encode.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/contrib/libs/linux-headers/asm-generic/hugetlb_encode.h b/contrib/libs/linux-headers/asm-generic/hugetlb_encode.h new file mode 100644 index 0000000000..b0f8e87235 --- /dev/null +++ b/contrib/libs/linux-headers/asm-generic/hugetlb_encode.h @@ -0,0 +1,36 @@ +#ifndef _ASM_GENERIC_HUGETLB_ENCODE_H_ +#define _ASM_GENERIC_HUGETLB_ENCODE_H_ + +/* + * Several system calls take a flag to request "hugetlb" huge pages. + * Without further specification, these system calls will use the + * system's default huge page size. If a system supports multiple + * huge page sizes, the desired huge page size can be specified in + * bits [26:31] of the flag arguments. The value in these 6 bits + * will encode the log2 of the huge page size. + * + * The following definitions are associated with this huge page size + * encoding in flag arguments. System call specific header files + * that use this encoding should include this file. They can then + * provide definitions based on these with their own specific prefix. + * for example: + * #define MAP_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT + */ + +#define HUGETLB_FLAG_ENCODE_SHIFT 26 +#define HUGETLB_FLAG_ENCODE_MASK 0x3f + +#define HUGETLB_FLAG_ENCODE_64KB (16 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_512KB (19 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_1MB (20 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_2MB (21 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_8MB (23 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_16MB (24 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_32MB (25 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_256MB (28 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_512MB (29 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_1GB (30 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_2GB (31 << HUGETLB_FLAG_ENCODE_SHIFT) +#define HUGETLB_FLAG_ENCODE_16GB (34 << HUGETLB_FLAG_ENCODE_SHIFT) + +#endif /* _ASM_GENERIC_HUGETLB_ENCODE_H_ */ |