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 extern void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, 17 unsigned long addr, pte_t *ptep, 18 pte_t old_pte, pte_t pte); 19 20 static inline int hstate_get_psize(struct hstate *hstate) 21 { 22 unsigned long shift; 23 24 shift = huge_page_shift(hstate); 25 if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) 26 return MMU_PAGE_2M; 27 else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) 28 return MMU_PAGE_1G; 29 else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift) 30 return MMU_PAGE_16M; 31 else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift) 32 return MMU_PAGE_16G; 33 else { 34 WARN(1, "Wrong huge page shift\n"); 35 return mmu_virtual_psize; 36 } 37 } 38 39 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE 40 static inline bool gigantic_page_supported(void) 41 { 42 /* 43 * We used gigantic page reservation with hypervisor assist in some case. 44 * We cannot use runtime allocation of gigantic pages in those platforms 45 * This is hash translation mode LPARs. 46 */ 47 if (firmware_has_feature(FW_FEATURE_LPAR) && !radix_enabled()) 48 return false; 49 50 return true; 51 } 52 #endif 53 54 /* hugepd entry valid bit */ 55 #define HUGEPD_VAL_BITS (0x8000000000000000UL) 56 57 #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start 58 extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, 59 unsigned long addr, pte_t *ptep); 60 61 #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit 62 extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, 63 unsigned long addr, pte_t *ptep, 64 pte_t old_pte, pte_t new_pte); 65 #endif 66