arch/powerpc/include/asm/book3s/64/hugetlb.h

   1 #ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H
   2 #define _ASM_POWERPC_BOOK3S_64_HUGETLB_H
   3 /*
   4  * For radix we want generic code to handle hugetlb. But then if we want
   5  * both hash and radix to be enabled together we need to workaround the
   6  * limitations.
   7  */
   8 void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
   9 void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  10 extern unsigned long
  11 radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
  12                                 unsigned long len, unsigned long pgoff,
  13                                 unsigned long flags);
  14
  15 static inline int hstate_get_psize(struct hstate *hstate)
  16 {
  17         unsigned long shift;
  18
  19         shift = huge_page_shift(hstate);
  20         if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
  21                 return MMU_PAGE_2M;
  22         else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
  23                 return MMU_PAGE_1G;
  24         else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift)
  25                 return MMU_PAGE_16M;
  26         else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift)
  27                 return MMU_PAGE_16G;
  28         else {
  29                 WARN(1, "Wrong huge page shift\n");
  30                 return mmu_virtual_psize;
  31         }
  32 }
  33
  34 #define arch_make_huge_pte arch_make_huge_pte
  35 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
  36                                        struct page *page, int writable)
  37 {
  38         unsigned long page_shift;
  39
  40         if (!cpu_has_feature(CPU_FTR_POWER9_DD1))
  41                 return entry;
  42
  43         page_shift = huge_page_shift(hstate_vma(vma));
  44         /*
  45          * We don't support 1G hugetlb pages yet.
  46          */
  47         VM_WARN_ON(page_shift == mmu_psize_defs[MMU_PAGE_1G].shift);
  48         if (page_shift == mmu_psize_defs[MMU_PAGE_2M].shift)
  49                 return __pte(pte_val(entry) | R_PAGE_LARGE);
  50         else
  51                 return entry;
  52 }
  53
  54 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
  55 static inline bool gigantic_page_supported(void)
  56 {
  57         if (radix_enabled())
  58                 return true;
  59         return false;
  60 }
  61 #endif
  62
  63 #endif