/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* TLB shootdown specifics for powerpc
*
* Copyright ( C ) 2002 Anton Blanchard , IBM Corp .
* Copyright ( C ) 2002 Paul Mackerras , IBM Corp .
*/
#ifndef _ASM_POWERPC_TLB_H
#define _ASM_POWERPC_TLB_H
#ifdef __KERNEL__
#ifndef __powerpc64__
#include <linux/pgtable.h>
#endif
#ifndef __powerpc64__
#include <asm /page.h>
#include <asm /mmu.h>
#endif
#include <linux/pagemap.h>
static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
unsigned long address);
#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
#define tlb_flush tlb_flush
extern void tlb_flush(struct mmu_gather *tlb);
/*
* book3s :
* Hash does not use the linux page - tables , so we can avoid
* the TLB invalidate for page - table freeing , Radix otoh does use the
* page - tables and needs the TLBI .
*
* nohash :
* We still do TLB invalidate in the _ _ pte_free_tlb routine before we
* add the page table pages to mmu gather table batch .
*/
#define tlb_needs_table_invalidate() radix_enabled()
#define __HAVE_ARCH_TLB_REMOVE_TABLE
/* Get the generic bits... */
#include <asm -generic/tlb.h>
static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
unsigned long address)
{
#ifdef CONFIG_PPC_BOOK3S_32
if (pte_val(*ptep) & _PAGE_HASHPTE)
flush_hash_entry(tlb->mm, ptep, address);
#endif
}
#ifdef CONFIG_SMP
static inline int mm_is_core_local(struct mm_struct *mm)
{
return cpumask_subset(mm_cpumask(mm),
topology_sibling_cpumask(smp_processor_id()));
}
#ifdef CONFIG_PPC_BOOK3S_64
static inline int mm_is_thread_local(struct mm_struct *mm)
{
if (atomic_read(&mm->context.active_cpus) > 1 )
return false ;
return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
}
#else /* CONFIG_PPC_BOOK3S_64 */
static inline int mm_is_thread_local(struct mm_struct *mm)
{
return cpumask_equal(mm_cpumask(mm),
cpumask_of(smp_processor_id()));
}
#endif /* !CONFIG_PPC_BOOK3S_64 */
#else /* CONFIG_SMP */
static inline int mm_is_core_local(struct mm_struct *mm)
{
return 1 ;
}
static inline int mm_is_thread_local(struct mm_struct *mm)
{
return 1 ;
}
#endif
#define arch_supports_page_table_move arch_supports_page_table_move
static inline bool arch_supports_page_table_move(void )
{
return radix_enabled();
}
#endif /* __KERNEL__ */
#endif /* __ASM_POWERPC_TLB_H */
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(vorverarbeitet am 2026-10-02)
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