mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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07f8ba7439
This merge contains the user-visible, ABI-breaking changes that we want
to make sure we have in Linux before our first release. Highlights
include:
* VDSO entries for clock_get/gettimeofday/getcpu have been added. These
are simple syscalls now, but we want to let glibc use them from the
start so we can make them faster later.
* A VDSO entry for instruction cache flushing has been added so
userspace can flush the instruction cache.
* The VDSO symbol versions for __vdso_cmpxchg{32,64} have been removed,
as those VDSO entries don't actually exist.
Conflicts:
arch/riscv/include/asm/tlbflush.h
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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#ifdef CONFIG_MMU
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#include <linux/mm_types.h>
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/*
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* Flush entire local TLB. 'sfence.vma' implicitly fences with the instruction
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* cache as well, so a 'fence.i' is not necessary.
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*/
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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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__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory");
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}
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#ifndef CONFIG_SMP
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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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#define flush_tlb_range(vma, start, end) local_flush_tlb_all()
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#else /* CONFIG_SMP */
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#include <asm/sbi.h>
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#define flush_tlb_all() sbi_remote_sfence_vma(0, 0, -1)
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#define flush_tlb_page(vma, addr) flush_tlb_range(vma, addr, 0)
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#define flush_tlb_range(vma, start, end) \
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sbi_remote_sfence_vma(0, start, (end) - (start))
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#endif /* CONFIG_SMP */
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/* Flush the TLB entries of the specified mm context */
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static inline void flush_tlb_mm(struct mm_struct *mm)
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{
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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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flush_tlb_all();
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}
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#endif /* CONFIG_MMU */
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#endif /* _ASM_RISCV_TLBFLUSH_H */
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