/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
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#define _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
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/*
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* TLB flushing for 64-bit hash-MMU CPUs
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*/
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#include <linux/percpu.h>
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#include <asm/page.h>
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#define PPC64_TLB_BATCH_NR 192
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struct ppc64_tlb_batch {
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int active;
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unsigned long index;
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struct mm_struct *mm;
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real_pte_t pte[PPC64_TLB_BATCH_NR];
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unsigned long vpn[PPC64_TLB_BATCH_NR];
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unsigned int psize;
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int ssize;
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};
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DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
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extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
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#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
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static inline void arch_enter_lazy_mmu_mode(void)
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{
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struct ppc64_tlb_batch *batch;
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if (radix_enabled())
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return;
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batch = this_cpu_ptr(&ppc64_tlb_batch);
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batch->active = 1;
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}
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static inline void arch_leave_lazy_mmu_mode(void)
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{
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struct ppc64_tlb_batch *batch;
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if (radix_enabled())
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return;
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batch = this_cpu_ptr(&ppc64_tlb_batch);
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if (batch->index)
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__flush_tlb_pending(batch);
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batch->active = 0;
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}
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#define arch_flush_lazy_mmu_mode() do {} while (0)
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extern void hash__tlbiel_all(unsigned int action);
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extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
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int ssize, unsigned long flags);
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extern void flush_hash_range(unsigned long number, int local);
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extern void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
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pmd_t *pmdp, unsigned int psize, int ssize,
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unsigned long flags);
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static inline void hash__local_flush_tlb_mm(struct mm_struct *mm)
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{
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}
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static inline void hash__flush_tlb_mm(struct mm_struct *mm)
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{
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}
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static inline void hash__local_flush_all_mm(struct mm_struct *mm)
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{
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/*
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* There's no Page Walk Cache for hash, so what is needed is
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* the same as flush_tlb_mm(), which doesn't really make sense
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* with hash. So the only thing we could do is flush the
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* entire LPID! Punt for now, as it's not being used.
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*/
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WARN_ON_ONCE(1);
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}
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static inline void hash__flush_all_mm(struct mm_struct *mm)
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{
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/*
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* There's no Page Walk Cache for hash, so what is needed is
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* the same as flush_tlb_mm(), which doesn't really make sense
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* with hash. So the only thing we could do is flush the
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* entire LPID! Punt for now, as it's not being used.
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*/
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WARN_ON_ONCE(1);
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}
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static inline void hash__local_flush_tlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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}
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static inline void hash__flush_tlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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}
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static inline void hash__flush_tlb_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end)
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{
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}
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static inline void hash__flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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}
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struct mmu_gather;
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extern void hash__tlb_flush(struct mmu_gather *tlb);
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/* Private function for use by PCI IO mapping code */
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extern void __flush_hash_table_range(unsigned long start, unsigned long end);
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extern void flush_tlb_pmd_range(struct mm_struct *mm, pmd_t *pmd,
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unsigned long addr);
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#endif /* _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H */
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