| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H |
| #define _ASM_POWERPC_BOOK3S_64_HUGETLB_H |
| /* |
| * For radix we want generic code to handle hugetlb. But then if we want |
| * both hash and radix to be enabled together we need to workaround the |
| * limitations. |
| */ |
| void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); |
| void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); |
| extern unsigned long |
| radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
| unsigned long len, unsigned long pgoff, |
| unsigned long flags); |
| |
| extern void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep, |
| pte_t old_pte, pte_t pte); |
| |
| static inline int hstate_get_psize(struct hstate *hstate) |
| { |
| unsigned long shift; |
| |
| shift = huge_page_shift(hstate); |
| if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) |
| return MMU_PAGE_2M; |
| else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) |
| return MMU_PAGE_1G; |
| else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift) |
| return MMU_PAGE_16M; |
| else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift) |
| return MMU_PAGE_16G; |
| else { |
| WARN(1, "Wrong huge page shift\n"); |
| return mmu_virtual_psize; |
| } |
| } |
| |
| #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE |
| static inline bool gigantic_page_supported(void) |
| { |
| /* |
| * We used gigantic page reservation with hypervisor assist in some case. |
| * We cannot use runtime allocation of gigantic pages in those platforms |
| * This is hash translation mode LPARs. |
| */ |
| if (firmware_has_feature(FW_FEATURE_LPAR) && !radix_enabled()) |
| return false; |
| |
| return true; |
| } |
| #endif |
| |
| /* hugepd entry valid bit */ |
| #define HUGEPD_VAL_BITS (0x8000000000000000UL) |
| |
| #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start |
| extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep); |
| |
| #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit |
| extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep, |
| pte_t old_pte, pte_t new_pte); |
| #endif |