mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 10:30:52 +07:00
20916d4636
ARM64 architecture also supports 32MB and 512MB HugeTLB page sizes. This just adds mmap() system call argument encoding for them. Link: http://lkml.kernel.org/r/1537841300-6979-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
37 lines
1.7 KiB
C
37 lines
1.7 KiB
C
#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_ */
|