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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cacheline.c (568B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include "cacheline.h"
      3#include <unistd.h>
      4
      5#ifdef _SC_LEVEL1_DCACHE_LINESIZE
      6#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
      7#else
      8#include <api/fs/fs.h>
      9#include "debug.h"
     10static void cache_line_size(int *cacheline_sizep)
     11{
     12	if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
     13		pr_debug("cannot determine cache line size");
     14}
     15#endif
     16
     17int cacheline_size(void)
     18{
     19	static int size;
     20
     21	if (!size)
     22		cache_line_size(&size);
     23
     24	return size;
     25}