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 hstate_get_psize(struct hstate * hstate)16static 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 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE gigantic_page_supported(void)36static inline bool gigantic_page_supported(void) 37 { 38 /* 39 * We used gigantic page reservation with hypervisor assist in some case. 40 * We cannot use runtime allocation of gigantic pages in those platforms 41 * This is hash translation mode LPARs. 42 */ 43 if (firmware_has_feature(FW_FEATURE_LPAR) && !radix_enabled()) 44 return false; 45 46 return true; 47 } 48 #endif 49 50 #endif 51