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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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df7b2155bb
Adds support for 16GB hugepage size. To use this page size use kernel parameters as: default_hugepagesz=16G hugepagesz=16G hugepages=10 Testing: Tested with the stream benchmark which allocates 48G of arrays backed by 16G hugepages and does RW operation on them in parallel. Orabug: 25362942 Cc: Anthony Yznaga <anthony.yznaga@oracle.com> Reviewed-by: Bob Picco <bob.picco@oracle.com> Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
#ifndef _ASM_SPARC64_HUGETLB_H
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#define _ASM_SPARC64_HUGETLB_H
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#include <asm/page.h>
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#include <asm-generic/hugetlb.h>
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#ifdef CONFIG_HUGETLB_PAGE
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struct pud_huge_patch_entry {
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unsigned int addr;
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unsigned int insn;
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};
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extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
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#endif
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void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep, pte_t pte);
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pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep);
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static inline int is_hugepage_only_range(struct mm_struct *mm,
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unsigned long addr,
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unsigned long len) {
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return 0;
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}
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/*
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* If the arch doesn't supply something else, assume that hugepage
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* size aligned regions are ok without further preparation.
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*/
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static inline int prepare_hugepage_range(struct file *file,
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unsigned long addr, unsigned long len)
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{
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struct hstate *h = hstate_file(file);
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if (len & ~huge_page_mask(h))
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return -EINVAL;
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if (addr & ~huge_page_mask(h))
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return -EINVAL;
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return 0;
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}
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static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep)
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{
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}
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static inline int huge_pte_none(pte_t pte)
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{
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return pte_none(pte);
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}
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static inline pte_t huge_pte_wrprotect(pte_t pte)
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{
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return pte_wrprotect(pte);
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}
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static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
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unsigned long addr, pte_t *ptep)
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{
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pte_t old_pte = *ptep;
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set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
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}
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static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep,
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pte_t pte, int dirty)
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{
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int changed = !pte_same(*ptep, pte);
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if (changed) {
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set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
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flush_tlb_page(vma, addr);
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}
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return changed;
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}
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static inline pte_t huge_ptep_get(pte_t *ptep)
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{
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return *ptep;
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}
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static inline void arch_clear_hugepage_flags(struct page *page)
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{
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}
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void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
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unsigned long end, unsigned long floor,
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unsigned long ceiling);
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#endif /* _ASM_SPARC64_HUGETLB_H */
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