diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/radix_hugetlbpage.c')
-rw-r--r-- | arch/powerpc/mm/book3s64/radix_hugetlbpage.c | 75 |
1 files changed, 14 insertions, 61 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_hugetlbpage.c b/arch/powerpc/mm/book3s64/radix_hugetlbpage.c index cab06331c0c0..35fd2a95be24 100644 --- a/arch/powerpc/mm/book3s64/radix_hugetlbpage.c +++ b/arch/powerpc/mm/book3s64/radix_hugetlbpage.c @@ -2,8 +2,6 @@ #include <linux/mm.h> #include <linux/hugetlb.h> #include <linux/security.h> -#include <asm/pgtable.h> -#include <asm/pgalloc.h> #include <asm/cacheflush.h> #include <asm/machdep.h> #include <asm/mman.h> @@ -34,62 +32,14 @@ void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long st struct hstate *hstate = hstate_file(vma->vm_file); psize = hstate_get_psize(hstate); - radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize); -} - -/* - * A vairant of hugetlb_get_unmapped_area doing topdown search - * FIXME!! should we do as x86 does or non hugetlb area does ? - * ie, use topdown or not based on mmap_is_legacy check ? - */ -unsigned long -radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags) -{ - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - struct hstate *h = hstate_file(file); - int fixed = (flags & MAP_FIXED); - unsigned long high_limit; - struct vm_unmapped_area_info info; - - high_limit = DEFAULT_MAP_WINDOW; - if (addr >= high_limit || (fixed && (addr + len > high_limit))) - high_limit = TASK_SIZE; - - if (len & ~huge_page_mask(h)) - return -EINVAL; - if (len > high_limit) - return -ENOMEM; - - if (fixed) { - if (addr > high_limit - len) - return -ENOMEM; - if (prepare_hugepage_range(file, addr, len)) - return -EINVAL; - return addr; - } - - if (addr) { - addr = ALIGN(addr, huge_page_size(h)); - vma = find_vma(mm, addr); - if (high_limit - len >= addr && addr >= mmap_min_addr && - (!vma || addr + len <= vm_start_gap(vma))) - return addr; - } /* - * We are always doing an topdown search here. Slice code - * does that too. + * Flush PWC even if we get PUD_SIZE hugetlb invalidate to keep this simpler. */ - info.flags = VM_UNMAPPED_AREA_TOPDOWN; - info.length = len; - info.low_limit = max(PAGE_SIZE, mmap_min_addr); - info.high_limit = mm->mmap_base + (high_limit - DEFAULT_MAP_WINDOW); - info.align_mask = PAGE_MASK & ~huge_page_mask(h); - info.align_offset = 0; - - return vm_unmapped_area(&info); + if (end - start >= PUD_SIZE) + radix__flush_tlb_pwc_range_psize(vma->vm_mm, start, end, psize); + else + radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize); + mmu_notifier_arch_invalidate_secondary_tlbs(vma->vm_mm, start, end); } void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, @@ -97,14 +47,17 @@ void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, pte_t old_pte, pte_t pte) { struct mm_struct *mm = vma->vm_mm; + unsigned long psize = huge_page_size(hstate_vma(vma)); /* - * To avoid NMMU hang while relaxing access we need to flush the tlb before - * we set the new value. + * POWER9 NMMU must flush the TLB after clearing the PTE before + * installing a PTE with more relaxed access permissions, see + * radix__ptep_set_access_flags. */ - if (is_pte_rw_upgrade(pte_val(old_pte), pte_val(pte)) && - (atomic_read(&mm->context.copros) > 0)) + if (!cpu_has_feature(CPU_FTR_ARCH_31) && + is_pte_rw_upgrade(pte_val(old_pte), pte_val(pte)) && + atomic_read(&mm->context.copros) > 0) radix__flush_hugetlb_page(vma, addr); - set_huge_pte_at(vma->vm_mm, addr, ptep, pte); + set_huge_pte_at(vma->vm_mm, addr, ptep, pte, psize); } |