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Diffstat (limited to 'arch/riscv/mm/pgtable.c')
-rw-r--r--arch/riscv/mm/pgtable.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/riscv/mm/pgtable.c b/arch/riscv/mm/pgtable.c
index 533ec9055fa0..8b6c0a112a8d 100644
--- a/arch/riscv/mm/pgtable.c
+++ b/arch/riscv/mm/pgtable.c
@@ -9,6 +9,9 @@ int ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep,
pte_t entry, int dirty)
{
+ asm goto(ALTERNATIVE("nop", "j %l[svvptc]", 0, RISCV_ISA_EXT_SVVPTC, 1)
+ : : : : svvptc);
+
if (!pte_same(ptep_get(ptep), entry))
__set_pte_at(vma->vm_mm, ptep, entry);
/*
@@ -16,6 +19,16 @@ int ptep_set_access_flags(struct vm_area_struct *vma,
* the case that the PTE changed and the spurious fault case.
*/
return true;
+
+svvptc:
+ if (!pte_same(ptep_get(ptep), entry)) {
+ __set_pte_at(vma->vm_mm, ptep, entry);
+ /* Here only not svadu is impacted */
+ flush_tlb_page(vma, address);
+ return true;
+ }
+
+ return false;
}
int ptep_test_and_clear_young(struct vm_area_struct *vma,
@@ -141,4 +154,14 @@ pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
flush_tlb_mm(vma->vm_mm);
return pmd;
}
+
+pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
+ pud_t *pudp)
+{
+ VM_WARN_ON_ONCE(!pud_present(*pudp));
+ pud_t old = pudp_establish(vma, address, pudp, pud_mkinvalid(*pudp));
+
+ flush_pud_tlb_range(vma, address, address + HPAGE_PUD_SIZE);
+ return old;
+}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */