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Several architectures (arm, arm64, riscv and x86) define exactly the same __tlb_remove_table(), just introduce generic __tlb_remove_table() to eliminate these duplications. The s390 __tlb_remove_table() is nearly the same, so also make s390 __tlb_remove_table() version generic. Link: https://lkml.kernel.org/r/ea372633d94f4d3f9f56a7ec5994bf050bf77e39.1736317725.git.zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com> Acked-by: Andreas Larsson <andreas@gaisler.com> [sparc] Acked-by: Alexander Gordeev <agordeev@linux.ibm.com> [s390] Acked-by: Arnd Bergmann <arnd@arndb.de> [asm-generic] Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jann Horn <jannh@google.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mike Rapoport (Microsoft) <rppt@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com> Cc: Will Deacon <will@kernel.org> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Based on arch/arm/include/asm/tlb.h
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*
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* Copyright (C) 2002 Russell King
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* Copyright (C) 2012 ARM Ltd.
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*/
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#ifndef __ASM_TLB_H
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#define __ASM_TLB_H
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#include <linux/pagemap.h>
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#define tlb_flush tlb_flush
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static void tlb_flush(struct mmu_gather *tlb);
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#include <asm-generic/tlb.h>
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/*
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* get the tlbi levels in arm64. Default value is TLBI_TTL_UNKNOWN if more than
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* one of cleared_* is set or neither is set - this elides the level hinting to
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* the hardware.
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*/
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static inline int tlb_get_level(struct mmu_gather *tlb)
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{
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/* The TTL field is only valid for the leaf entry. */
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if (tlb->freed_tables)
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return TLBI_TTL_UNKNOWN;
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if (tlb->cleared_ptes && !(tlb->cleared_pmds ||
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tlb->cleared_puds ||
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tlb->cleared_p4ds))
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return 3;
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if (tlb->cleared_pmds && !(tlb->cleared_ptes ||
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tlb->cleared_puds ||
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tlb->cleared_p4ds))
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return 2;
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if (tlb->cleared_puds && !(tlb->cleared_ptes ||
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tlb->cleared_pmds ||
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tlb->cleared_p4ds))
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return 1;
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if (tlb->cleared_p4ds && !(tlb->cleared_ptes ||
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tlb->cleared_pmds ||
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tlb->cleared_puds))
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return 0;
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return TLBI_TTL_UNKNOWN;
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}
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static inline void tlb_flush(struct mmu_gather *tlb)
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{
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struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
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bool last_level = !tlb->freed_tables;
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unsigned long stride = tlb_get_unmap_size(tlb);
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int tlb_level = tlb_get_level(tlb);
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/*
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* If we're tearing down the address space then we only care about
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* invalidating the walk-cache, since the ASID allocator won't
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* reallocate our ASID without invalidating the entire TLB.
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*/
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if (tlb->fullmm) {
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if (!last_level)
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flush_tlb_mm(tlb->mm);
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return;
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}
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__flush_tlb_range(&vma, tlb->start, tlb->end, stride,
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last_level, tlb_level);
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}
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
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unsigned long addr)
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{
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struct ptdesc *ptdesc = page_ptdesc(pte);
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tlb_remove_ptdesc(tlb, ptdesc);
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}
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#if CONFIG_PGTABLE_LEVELS > 2
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static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
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unsigned long addr)
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{
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struct ptdesc *ptdesc = virt_to_ptdesc(pmdp);
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tlb_remove_ptdesc(tlb, ptdesc);
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}
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#endif
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#if CONFIG_PGTABLE_LEVELS > 3
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static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
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unsigned long addr)
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{
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struct ptdesc *ptdesc = virt_to_ptdesc(pudp);
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if (!pgtable_l4_enabled())
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return;
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tlb_remove_ptdesc(tlb, ptdesc);
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}
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#endif
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#if CONFIG_PGTABLE_LEVELS > 4
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static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4dp,
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unsigned long addr)
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{
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struct ptdesc *ptdesc = virt_to_ptdesc(p4dp);
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if (!pgtable_l5_enabled())
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return;
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tlb_remove_ptdesc(tlb, ptdesc);
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}
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#endif
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#endif
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