5e22bfd520
This function used to simply flush the whole tlb of all harts, be more subtile and try to only flush the range. The problem is that we can only use PAGE_SIZE as stride since we don't know the size of the underlying mapping and then this function will be improved only if the size of the region to flush is < threshold * PAGE_SIZE. Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # On RZ/Five SMARC Reviewed-by: Samuel Holland <samuel.holland@sifive.com> Tested-by: Samuel Holland <samuel.holland@sifive.com> Link: https://lore.kernel.org/r/20231030133027.19542-5-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
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* Copyright (C) 2012 Regents of the University of California
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*/
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#ifndef _ASM_RISCV_TLBFLUSH_H
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#define _ASM_RISCV_TLBFLUSH_H
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#include <linux/mm_types.h>
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#include <asm/smp.h>
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#include <asm/errata_list.h>
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#define FLUSH_TLB_MAX_SIZE ((unsigned long)-1)
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#define FLUSH_TLB_NO_ASID ((unsigned long)-1)
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#ifdef CONFIG_MMU
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extern unsigned long asid_mask;
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static inline void local_flush_tlb_all(void)
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{
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__asm__ __volatile__ ("sfence.vma" : : : "memory");
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}
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/* Flush one page from local TLB */
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static inline void local_flush_tlb_page(unsigned long addr)
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{
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ALT_FLUSH_TLB_PAGE(__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"));
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}
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#else /* CONFIG_MMU */
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#define local_flush_tlb_all() do { } while (0)
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#define local_flush_tlb_page(addr) do { } while (0)
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#endif /* CONFIG_MMU */
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#if defined(CONFIG_SMP) && defined(CONFIG_MMU)
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void flush_tlb_all(void);
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void flush_tlb_mm(struct mm_struct *mm);
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void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
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unsigned long end, unsigned int page_size);
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void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
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void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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void flush_tlb_kernel_range(unsigned long start, unsigned long end);
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
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void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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#endif
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#else /* CONFIG_SMP && CONFIG_MMU */
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#define flush_tlb_all() local_flush_tlb_all()
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#define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
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static inline void 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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local_flush_tlb_all();
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}
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/* Flush a range of kernel pages */
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static inline void flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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local_flush_tlb_all();
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}
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#define flush_tlb_mm(mm) flush_tlb_all()
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#define flush_tlb_mm_range(mm, start, end, page_size) flush_tlb_all()
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#endif /* !CONFIG_SMP || !CONFIG_MMU */
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#endif /* _ASM_RISCV_TLBFLUSH_H */
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