mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
084bd29810
Add huge page support to ARM64, different huge page sizes are
supported depending on the size of normal pages:
PAGE_SIZE is 4KB:
2MB - (pmds) these can be allocated at any time.
1024MB - (puds) usually allocated on bootup with the command line
with something like: hugepagesz=1G hugepages=6
PAGE_SIZE is 64KB:
512MB - (pmds) usually allocated on bootup via command line.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
118 lines
2.8 KiB
C
118 lines
2.8 KiB
C
/*
|
|
* arch/arm64/include/asm/hugetlb.h
|
|
*
|
|
* Copyright (C) 2013 Linaro Ltd.
|
|
*
|
|
* Based on arch/x86/include/asm/hugetlb.h
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __ASM_HUGETLB_H
|
|
#define __ASM_HUGETLB_H
|
|
|
|
#include <asm-generic/hugetlb.h>
|
|
#include <asm/page.h>
|
|
|
|
static inline pte_t huge_ptep_get(pte_t *ptep)
|
|
{
|
|
return *ptep;
|
|
}
|
|
|
|
static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, pte_t pte)
|
|
{
|
|
set_pte_at(mm, addr, ptep, pte);
|
|
}
|
|
|
|
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
ptep_clear_flush(vma, addr, ptep);
|
|
}
|
|
|
|
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
ptep_set_wrprotect(mm, addr, ptep);
|
|
}
|
|
|
|
static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
return ptep_get_and_clear(mm, addr, ptep);
|
|
}
|
|
|
|
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep,
|
|
pte_t pte, int dirty)
|
|
{
|
|
return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
|
|
}
|
|
|
|
static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
|
|
unsigned long addr, unsigned long end,
|
|
unsigned long floor,
|
|
unsigned long ceiling)
|
|
{
|
|
free_pgd_range(tlb, addr, end, floor, ceiling);
|
|
}
|
|
|
|
static inline int is_hugepage_only_range(struct mm_struct *mm,
|
|
unsigned long addr, unsigned long len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int prepare_hugepage_range(struct file *file,
|
|
unsigned long addr, unsigned long len)
|
|
{
|
|
struct hstate *h = hstate_file(file);
|
|
if (len & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
if (addr & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
|
|
{
|
|
}
|
|
|
|
static inline int huge_pte_none(pte_t pte)
|
|
{
|
|
return pte_none(pte);
|
|
}
|
|
|
|
static inline pte_t huge_pte_wrprotect(pte_t pte)
|
|
{
|
|
return pte_wrprotect(pte);
|
|
}
|
|
|
|
static inline int arch_prepare_hugepage(struct page *page)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void arch_release_hugepage(struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline void arch_clear_hugepage_flags(struct page *page)
|
|
{
|
|
clear_bit(PG_dcache_clean, &page->flags);
|
|
}
|
|
|
|
#endif /* __ASM_HUGETLB_H */
|