1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H 3 #define _ASM_POWERPC_BOOK3S_64_HUGETLB_H 4 /* 5 * For radix we want generic code to handle hugetlb. But then if we want 6 * both hash and radix to be enabled together we need to workaround the 7 * limitations. 8 */ 9 void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 10 void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 11 extern unsigned long 12 radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, 13 unsigned long len, unsigned long pgoff, 14 unsigned long flags); 15 16 static inline int hstate_get_psize(struct hstate *hstate) 17 { 18 unsigned long shift; 19 20 shift = huge_page_shift(hstate); 21 if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) 22 return MMU_PAGE_2M; 23 else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) 24 return MMU_PAGE_1G; 25 else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift) 26 return MMU_PAGE_16M; 27 else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift) 28 return MMU_PAGE_16G; 29 else { 30 WARN(1, "Wrong huge page shift\n"); 31 return mmu_virtual_psize; 32 } 33 } 34 35 #define arch_make_huge_pte arch_make_huge_pte 36 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, 37 struct page *page, int writable) 38 { 39 unsigned long page_shift; 40 41 if (!cpu_has_feature(CPU_FTR_POWER9_DD1)) 42 return entry; 43 44 page_shift = huge_page_shift(hstate_vma(vma)); 45 /* 46 * We don't support 1G hugetlb pages yet. 47 */ 48 VM_WARN_ON(page_shift == mmu_psize_defs[MMU_PAGE_1G].shift); 49 if (page_shift == mmu_psize_defs[MMU_PAGE_2M].shift) 50 return __pte(pte_val(entry) | R_PAGE_LARGE); 51 else 52 return entry; 53 } 54 55 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE 56 static inline bool gigantic_page_supported(void) 57 { 58 return true; 59 } 60 #endif 61 62 #endif 63