powerpc/mm/pgtable.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
7  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
27 #include <asm/tlb.h>
29 #include <asm/pte-walk.h>
41 	return current->thread.regs && TRAP(current->thread.regs) == 0x400;  in is_exec_fault()
76 /* Server-style MMU handles coherency when hashing if HW exec permission
77  * is supposed per page (currently 64-bit only). If not, then, we always
90 		if (!test_bit(PG_dcache_clean, &folio->flags)) {  in set_pte_filter_hash()
92 			set_bit(PG_dcache_clean, &folio->flags);  in set_pte_filter_hash()
108  * This is also called once for the folio. So only work with folio->flags here.
130 	if (test_bit(PG_dcache_clean, &folio->flags))  in set_pte_filter()
136 		set_bit(PG_dcache_clean, &folio->flags);  in set_pte_filter()
168 	if (WARN_ON(!(vma->vm_flags & VM_EXEC)))  in set_access_flags_filter()
178 	if (test_bit(PG_dcache_clean, &folio->flags))  in set_access_flags_filter()
183 	set_bit(PG_dcache_clean, &folio->flags);  in set_access_flags_filter()
196 	/* Note: mm->context.id might not yet have been assigned as  in set_ptes()
213 		 * tlb flush for this update.  in set_ptes()
219 		if (--nr == 0)  in set_ptes()
250 		assert_pte_locked(vma->vm_mm, address);  in ptep_set_access_flags()
265 	 * TLB entry.  Without this, platforms that don't do a write of the TLB  in huge_ptep_set_access_flags()
266 	 * entry in the TLB miss handler asm will fault ad infinitum.  in huge_ptep_set_access_flags()
282 		assert_spin_locked(huge_pte_lockptr(h, vma->vm_mm, ptep));  in huge_ptep_set_access_flags()
303 #error "8M hugetlb folios are incompatible with split page table locks"
313 	 * tlb flush for this update.  in __set_huge_pte_at()
351 	 * tlb flush for this update.  in set_huge_pte_at()
386 	pgd = mm->pgd + pgd_index(addr);  in assert_pte_locked()
426  * when we have MSR[EE] = 0 but the paca->irq_soft_mask = IRQS_ENABLED
448 	 * value don't get updated by a parallel THP split/collapse,  in __find_linux_pte()
503 	 * A hugepage split is captured by this condition, see  in __find_linux_pte()