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