| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 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/pgtable.h> |
| 6 | #include <asm/pgalloc.h> |
| 7 | #include <asm/cacheflush.h> |
| 8 | #include <asm/machdep.h> |
| 9 | #include <asm/mman.h> |
| 10 | #include <asm/tlb.h> |
| 11 | |
| 12 | void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) |
| 13 | { |
| 14 | int psize; |
| 15 | struct hstate *hstate = hstate_file(vma->vm_file); |
| 16 | |
| 17 | psize = hstate_get_psize(hstate); |
| 18 | radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize); |
| 19 | } |
| 20 | |
| 21 | void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) |
| 22 | { |
| 23 | int psize; |
| 24 | struct hstate *hstate = hstate_file(vma->vm_file); |
| 25 | |
| 26 | psize = hstate_get_psize(hstate); |
| 27 | radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize); |
| 28 | } |
| 29 | |
| 30 | void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start, |
| 31 | unsigned long end) |
| 32 | { |
| 33 | int psize; |
| 34 | struct hstate *hstate = hstate_file(vma->vm_file); |
| 35 | |
| 36 | psize = hstate_get_psize(hstate); |
| 37 | radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize); |
| 38 | } |
| 39 | |
| 40 | /* |
| 41 | * A vairant of hugetlb_get_unmapped_area doing topdown search |
| 42 | * FIXME!! should we do as x86 does or non hugetlb area does ? |
| 43 | * ie, use topdown or not based on mmap_is_legacy check ? |
| 44 | */ |
| 45 | unsigned long |
| 46 | radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
| 47 | unsigned long len, unsigned long pgoff, |
| 48 | unsigned long flags) |
| 49 | { |
| 50 | struct mm_struct *mm = current->mm; |
| 51 | struct vm_area_struct *vma; |
| 52 | struct hstate *h = hstate_file(file); |
| 53 | int fixed = (flags & MAP_FIXED); |
| 54 | unsigned long high_limit; |
| 55 | struct vm_unmapped_area_info info; |
| 56 | |
| 57 | high_limit = DEFAULT_MAP_WINDOW; |
| 58 | if (addr >= high_limit || (fixed && (addr + len > high_limit))) |
| 59 | high_limit = TASK_SIZE; |
| 60 | |
| 61 | if (len & ~huge_page_mask(h)) |
| 62 | return -EINVAL; |
| 63 | if (len > high_limit) |
| 64 | return -ENOMEM; |
| 65 | if (fixed) { |
| 66 | if (addr > high_limit - len) |
| 67 | return -ENOMEM; |
| 68 | } |
| 69 | |
| 70 | if (unlikely(addr > mm->context.addr_limit && |
| 71 | mm->context.addr_limit != TASK_SIZE)) |
| 72 | mm->context.addr_limit = TASK_SIZE; |
| 73 | |
| 74 | if (fixed) { |
| 75 | if (prepare_hugepage_range(file, addr, len)) |
| 76 | return -EINVAL; |
| 77 | return addr; |
| 78 | } |
| 79 | |
| 80 | if (addr) { |
| 81 | addr = ALIGN(addr, huge_page_size(h)); |
| 82 | vma = find_vma(mm, addr); |
| 83 | if (high_limit - len >= addr && addr >= mmap_min_addr && |
| 84 | (!vma || addr + len <= vm_start_gap(vma))) |
| 85 | return addr; |
| 86 | } |
| 87 | /* |
| 88 | * We are always doing an topdown search here. Slice code |
| 89 | * does that too. |
| 90 | */ |
| 91 | info.flags = VM_UNMAPPED_AREA_TOPDOWN; |
| 92 | info.length = len; |
| 93 | info.low_limit = max(PAGE_SIZE, mmap_min_addr); |
| 94 | info.high_limit = mm->mmap_base + (high_limit - DEFAULT_MAP_WINDOW); |
| 95 | info.align_mask = PAGE_MASK & ~huge_page_mask(h); |
| 96 | info.align_offset = 0; |
| 97 | |
| 98 | return vm_unmapped_area(&info); |
| 99 | } |