radix_hugetlbpage.c (1662B)
1// SPDX-License-Identifier: GPL-2.0 2#include <linux/mm.h> 3#include <linux/hugetlb.h> 4#include <linux/security.h> 5#include <asm/cacheflush.h> 6#include <asm/machdep.h> 7#include <asm/mman.h> 8#include <asm/tlb.h> 9 10void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) 11{ 12 int psize; 13 struct hstate *hstate = hstate_file(vma->vm_file); 14 15 psize = hstate_get_psize(hstate); 16 radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize); 17} 18 19void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) 20{ 21 int psize; 22 struct hstate *hstate = hstate_file(vma->vm_file); 23 24 psize = hstate_get_psize(hstate); 25 radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize); 26} 27 28void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start, 29 unsigned long end) 30{ 31 int psize; 32 struct hstate *hstate = hstate_file(vma->vm_file); 33 34 psize = hstate_get_psize(hstate); 35 /* 36 * Flush PWC even if we get PUD_SIZE hugetlb invalidate to keep this simpler. 37 */ 38 if (end - start >= PUD_SIZE) 39 radix__flush_tlb_pwc_range_psize(vma->vm_mm, start, end, psize); 40 else 41 radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize); 42} 43 44void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, 45 unsigned long addr, pte_t *ptep, 46 pte_t old_pte, pte_t pte) 47{ 48 struct mm_struct *mm = vma->vm_mm; 49 50 /* 51 * To avoid NMMU hang while relaxing access we need to flush the tlb before 52 * we set the new value. 53 */ 54 if (is_pte_rw_upgrade(pte_val(old_pte), pte_val(pte)) && 55 (atomic_read(&mm->context.copros) > 0)) 56 radix__flush_hugetlb_page(vma, addr); 57 58 set_huge_pte_at(vma->vm_mm, addr, ptep, pte); 59}