cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tlbflush.h (1497B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * TLB flush support for Hexagon
      4 *
      5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
      6 */
      7
      8#ifndef _ASM_TLBFLUSH_H
      9#define _ASM_TLBFLUSH_H
     10
     11#include <linux/mm.h>
     12#include <asm/processor.h>
     13
     14/*
     15 * TLB flushing -- in "SMP", these routines get defined to be the
     16 * ones from smp.c, else they are some local flavors.
     17 */
     18
     19/*
     20 * These functions are commonly macros, but in the interests of
     21 * VM vs. native implementation and code size, we simply declare
     22 * the function prototypes here.
     23 */
     24extern void tlb_flush_all(void);
     25extern void flush_tlb_mm(struct mm_struct *mm);
     26extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
     27extern void flush_tlb_range(struct vm_area_struct *vma,
     28				unsigned long start, unsigned long end);
     29extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
     30extern void flush_tlb_one(unsigned long);
     31
     32/*
     33 * "This is called in munmap when we have freed up some page-table pages.
     34 * We don't need to do anything here..."
     35 *
     36 * The VM kernel doesn't walk page tables, and they are passed to the VMM
     37 * by logical address. There doesn't seem to be any possibility that they
     38 * could be referenced by the VM kernel based on a stale mapping, since
     39 * they would only be located by consulting the mm structure, and they
     40 * will have been purged from that structure by the munmap.  Seems like
     41 * a noop on HVM as well.
     42 */
     43#define flush_tlb_pgtables(mm, start, end)
     44
     45#endif