62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/mm.h>
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#include <linux/hugetlb.h>
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#include <linux/security.h>
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#include <asm/cacheflush.h>
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#include <asm/machdep.h>
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#include <asm/mman.h>
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#include <asm/tlb.h>
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void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
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{
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int psize;
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struct hstate *hstate = hstate_file(vma->vm_file);
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psize = hstate_get_psize(hstate);
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radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
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}
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void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
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{
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int psize;
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struct hstate *hstate = hstate_file(vma->vm_file);
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psize = hstate_get_psize(hstate);
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radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
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}
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void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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int psize;
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struct hstate *hstate = hstate_file(vma->vm_file);
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psize = hstate_get_psize(hstate);
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/*
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* Flush PWC even if we get PUD_SIZE hugetlb invalidate to keep this simpler.
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*/
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if (end - start >= PUD_SIZE)
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radix__flush_tlb_pwc_range_psize(vma->vm_mm, start, end, psize);
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else
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radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize);
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}
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void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep,
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pte_t old_pte, pte_t pte)
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{
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struct mm_struct *mm = vma->vm_mm;
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/*
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* POWER9 NMMU must flush the TLB after clearing the PTE before
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* installing a PTE with more relaxed access permissions, see
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* radix__ptep_set_access_flags.
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*/
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if (!cpu_has_feature(CPU_FTR_ARCH_31) &&
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is_pte_rw_upgrade(pte_val(old_pte), pte_val(pte)) &&
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atomic_read(&mm->context.copros) > 0)
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radix__flush_hugetlb_page(vma, addr);
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set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
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}
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