194 lines
4.5 KiB
C
194 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_HUGETLB_H
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#define _ASM_POWERPC_HUGETLB_H
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#ifdef CONFIG_HUGETLB_PAGE
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#include <asm/page.h>
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#include <asm-generic/hugetlb.h>
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extern struct kmem_cache *hugepte_cache;
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#ifdef CONFIG_PPC_BOOK3S_64
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#include <asm/book3s/64/hugetlb.h>
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/*
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* This should work for other subarchs too. But right now we use the
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* new format only for 64bit book3s
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*/
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static inline pte_t *hugepd_page(hugepd_t hpd)
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{
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BUG_ON(!hugepd_ok(hpd));
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/*
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* We have only four bits to encode, MMU page size
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*/
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BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf);
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return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK);
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}
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static inline unsigned int hugepd_mmu_psize(hugepd_t hpd)
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{
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return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2;
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}
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static inline unsigned int hugepd_shift(hugepd_t hpd)
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{
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return mmu_psize_to_shift(hugepd_mmu_psize(hpd));
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}
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static inline void flush_hugetlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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if (radix_enabled())
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return radix__flush_hugetlb_page(vma, vmaddr);
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}
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#else
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static inline pte_t *hugepd_page(hugepd_t hpd)
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{
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BUG_ON(!hugepd_ok(hpd));
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#ifdef CONFIG_PPC_8xx
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return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
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#else
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return (pte_t *)((hpd_val(hpd) &
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~HUGEPD_SHIFT_MASK) | PD_HUGE);
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#endif
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}
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static inline unsigned int hugepd_shift(hugepd_t hpd)
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{
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#ifdef CONFIG_PPC_8xx
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return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17;
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#else
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return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
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#endif
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}
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#endif /* CONFIG_PPC_BOOK3S_64 */
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static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
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unsigned pdshift)
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{
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/*
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* On FSL BookE, we have multiple higher-level table entries that
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* point to the same hugepte. Just use the first one since they're all
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* identical. So for that case, idx=0.
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*/
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unsigned long idx = 0;
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pte_t *dir = hugepd_page(hpd);
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#ifndef CONFIG_PPC_FSL_BOOK3E
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idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd);
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#endif
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return dir + idx;
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}
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void flush_dcache_icache_hugepage(struct page *page);
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int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
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unsigned long len);
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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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{
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if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
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return slice_is_hugepage_only_range(mm, addr, len);
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return 0;
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}
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void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
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pte_t pte);
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#ifdef CONFIG_PPC_8xx
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static inline void flush_hugetlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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flush_tlb_page(vma, vmaddr);
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}
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#else
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void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
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#endif
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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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/*
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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 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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{
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set_pte_at(mm, addr, ptep, pte);
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}
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static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
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unsigned long addr, pte_t *ptep)
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{
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#ifdef CONFIG_PPC64
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return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
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#else
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return __pte(pte_update(ptep, ~0UL, 0));
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#endif
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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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pte_t pte;
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pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
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flush_hugetlb_page(vma, addr);
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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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extern 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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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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#else /* ! CONFIG_HUGETLB_PAGE */
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static inline void flush_hugetlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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}
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#define hugepd_shift(x) 0
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static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
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unsigned pdshift)
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{
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return NULL;
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}
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#endif /* CONFIG_HUGETLB_PAGE */
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#endif /* _ASM_POWERPC_HUGETLB_H */
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