46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 Regents of the University of California
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*/
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#ifndef _ASM_RISCV_TLB_H
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#define _ASM_RISCV_TLB_H
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struct mmu_gather;
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static void tlb_flush(struct mmu_gather *tlb);
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#ifdef CONFIG_MMU
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#include <linux/swap.h>
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/*
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* While riscv platforms with riscv_ipi_for_rfence as true require an IPI to
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* perform TLB shootdown, some platforms with riscv_ipi_for_rfence as false use
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* SBI to perform TLB shootdown. To keep software pagetable walkers safe in this
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* case we switch to RCU based table free (MMU_GATHER_RCU_TABLE_FREE). See the
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* comment below 'ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE' in include/asm-generic/tlb.h
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* for more details.
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*/
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static inline void __tlb_remove_table(void *table)
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{
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free_page_and_swap_cache(table);
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}
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#endif /* CONFIG_MMU */
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#define tlb_flush tlb_flush
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#include <asm-generic/tlb.h>
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static inline void tlb_flush(struct mmu_gather *tlb)
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{
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#ifdef CONFIG_MMU
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if (tlb->fullmm || tlb->need_flush_all || tlb->freed_tables)
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flush_tlb_mm(tlb->mm);
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else
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flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end,
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tlb_get_unmap_size(tlb));
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#endif
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}
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#endif /* _ASM_RISCV_TLB_H */
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