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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highmem.c (775B)

      1// SPDX-License-Identifier: GPL-2.0
      2// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
      3
      4#include <linux/module.h>
      5#include <linux/highmem.h>
      6#include <linux/smp.h>
      7#include <linux/memblock.h>
      8#include <asm/fixmap.h>
      9#include <asm/tlbflush.h>
     10#include <asm/cacheflush.h>
     11
     12unsigned long highstart_pfn, highend_pfn;
     13
     14void kmap_flush_tlb(unsigned long addr)
     15{
     16	flush_tlb_one(addr);
     17}
     18EXPORT_SYMBOL(kmap_flush_tlb);
     19
     20void __init kmap_init(void)
     21{
     22	unsigned long vaddr;
     23	pgd_t *pgd;
     24	pmd_t *pmd;
     25	pud_t *pud;
     26	pte_t *pte;
     27
     28	vaddr = PKMAP_BASE;
     29	fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir);
     30
     31	pgd = swapper_pg_dir + pgd_index(vaddr);
     32	pud = (pud_t *)pgd;
     33	pmd = pmd_offset(pud, vaddr);
     34	pte = pte_offset_kernel(pmd, vaddr);
     35	pkmap_page_table = pte;
     36}