3f1e782998
Implement optimized version of the tlb flushing routines for systems
using ASIDs. These are behind the use_asid_allocator static branch to
not affect existing systems not using ASIDs.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
[hch: rebased on top of previous cleanups, use the same algorithm as
the non-ASID based code for local vs global flushes, keep functions
as local as possible]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
41 lines
898 B
C
41 lines
898 B
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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* Copyright (C) 2017 SiFive
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*/
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#ifndef _ASM_RISCV_MMU_CONTEXT_H
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#define _ASM_RISCV_MMU_CONTEXT_H
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#include <linux/mm_types.h>
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#include <asm-generic/mm_hooks.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *task);
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#define activate_mm activate_mm
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static inline void activate_mm(struct mm_struct *prev,
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struct mm_struct *next)
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{
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switch_mm(prev, next, NULL);
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}
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#define init_new_context init_new_context
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static inline int init_new_context(struct task_struct *tsk,
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struct mm_struct *mm)
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{
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#ifdef CONFIG_MMU
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atomic_long_set(&mm->context.id, 0);
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#endif
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return 0;
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}
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DECLARE_STATIC_KEY_FALSE(use_asid_allocator);
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#include <asm-generic/mmu_context.h>
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#endif /* _ASM_RISCV_MMU_CONTEXT_H */
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