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
radix__flush_hugetlb_page(struct vm_area_struct * vma,unsigned long vmaddr)10 void 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
radix__local_flush_hugetlb_page(struct vm_area_struct * vma,unsigned long vmaddr)19 void 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
radix__flush_hugetlb_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)28 void 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 mmu_notifier_arch_invalidate_secondary_tlbs(vma->vm_mm, start, end);
43 }
44
radix__huge_ptep_modify_prot_commit(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep,pte_t old_pte,pte_t pte)45 void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
46 unsigned long addr, pte_t *ptep,
47 pte_t old_pte, pte_t pte)
48 {
49 struct mm_struct *mm = vma->vm_mm;
50 unsigned long psize = huge_page_size(hstate_vma(vma));
51
52 /*
53 * POWER9 NMMU must flush the TLB after clearing the PTE before
54 * installing a PTE with more relaxed access permissions, see
55 * radix__ptep_set_access_flags.
56 */
57 if (!cpu_has_feature(CPU_FTR_ARCH_31) &&
58 is_pte_rw_upgrade(pte_val(old_pte), pte_val(pte)) &&
59 atomic_read(&mm->context.copros) > 0)
60 radix__flush_hugetlb_page(vma, addr);
61
62 set_huge_pte_at(vma->vm_mm, addr, ptep, pte, psize);
63 }
64