1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _UAPI_LINUX_MEMFD_H 3*4882a593Smuzhiyun #define _UAPI_LINUX_MEMFD_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <asm-generic/hugetlb_encode.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* flags for memfd_create(2) (unsigned int) */ 8*4882a593Smuzhiyun #define MFD_CLOEXEC 0x0001U 9*4882a593Smuzhiyun #define MFD_ALLOW_SEALING 0x0002U 10*4882a593Smuzhiyun #define MFD_HUGETLB 0x0004U 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* 13*4882a593Smuzhiyun * Huge page size encoding when MFD_HUGETLB is specified, and a huge page 14*4882a593Smuzhiyun * size other than the default is desired. See hugetlb_encode.h. 15*4882a593Smuzhiyun * All known huge page size encodings are provided here. It is the 16*4882a593Smuzhiyun * responsibility of the application to know which sizes are supported on 17*4882a593Smuzhiyun * the running system. See mmap(2) man page for details. 18*4882a593Smuzhiyun */ 19*4882a593Smuzhiyun #define MFD_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT 20*4882a593Smuzhiyun #define MFD_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #define MFD_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB 23*4882a593Smuzhiyun #define MFD_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB 24*4882a593Smuzhiyun #define MFD_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB 25*4882a593Smuzhiyun #define MFD_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB 26*4882a593Smuzhiyun #define MFD_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB 27*4882a593Smuzhiyun #define MFD_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB 28*4882a593Smuzhiyun #define MFD_HUGE_32MB HUGETLB_FLAG_ENCODE_32MB 29*4882a593Smuzhiyun #define MFD_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB 30*4882a593Smuzhiyun #define MFD_HUGE_512MB HUGETLB_FLAG_ENCODE_512MB 31*4882a593Smuzhiyun #define MFD_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB 32*4882a593Smuzhiyun #define MFD_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB 33*4882a593Smuzhiyun #define MFD_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #endif /* _UAPI_LINUX_MEMFD_H */ 36