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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mem2node.c (2025B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/compiler.h>
      3#include <linux/bitmap.h>
      4#include <linux/kernel.h>
      5#include <linux/zalloc.h>
      6#include <perf/cpumap.h>
      7#include <internal/cpumap.h>
      8#include "debug.h"
      9#include "env.h"
     10#include "mem2node.h"
     11#include "tests.h"
     12
     13static struct node {
     14	int		 node;
     15	const char 	*map;
     16} test_nodes[] = {
     17	{ .node = 0, .map = "0"     },
     18	{ .node = 1, .map = "1-2"   },
     19	{ .node = 3, .map = "5-7,9" },
     20};
     21
     22#define T TEST_ASSERT_VAL
     23
     24static unsigned long *get_bitmap(const char *str, int nbits)
     25{
     26	struct perf_cpu_map *map = perf_cpu_map__new(str);
     27	unsigned long *bm = NULL;
     28
     29	bm = bitmap_zalloc(nbits);
     30
     31	if (map && bm) {
     32		struct perf_cpu cpu;
     33		int i;
     34
     35		perf_cpu_map__for_each_cpu(cpu, i, map)
     36			set_bit(cpu.cpu, bm);
     37	}
     38
     39	if (map)
     40		perf_cpu_map__put(map);
     41	else
     42		free(bm);
     43
     44	return bm && map ? bm : NULL;
     45}
     46
     47static int test__mem2node(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
     48{
     49	struct mem2node map;
     50	struct memory_node nodes[3];
     51	struct perf_env env = {
     52		.memory_nodes    = (struct memory_node *) &nodes[0],
     53		.nr_memory_nodes = ARRAY_SIZE(nodes),
     54		.memory_bsize    = 0x100,
     55	};
     56	unsigned int i;
     57
     58	for (i = 0; i < ARRAY_SIZE(nodes); i++) {
     59		nodes[i].node = test_nodes[i].node;
     60		nodes[i].size = 10;
     61
     62		T("failed: alloc bitmap",
     63		  (nodes[i].set = get_bitmap(test_nodes[i].map, 10)));
     64	}
     65
     66	T("failed: mem2node__init", !mem2node__init(&map, &env));
     67	T("failed: mem2node__node",  0 == mem2node__node(&map,   0x50));
     68	T("failed: mem2node__node",  1 == mem2node__node(&map,  0x100));
     69	T("failed: mem2node__node",  1 == mem2node__node(&map,  0x250));
     70	T("failed: mem2node__node",  3 == mem2node__node(&map,  0x500));
     71	T("failed: mem2node__node",  3 == mem2node__node(&map,  0x650));
     72	T("failed: mem2node__node", -1 == mem2node__node(&map,  0x450));
     73	T("failed: mem2node__node", -1 == mem2node__node(&map, 0x1050));
     74
     75	for (i = 0; i < ARRAY_SIZE(nodes); i++)
     76		zfree(&nodes[i].set);
     77
     78	mem2node__exit(&map);
     79	return 0;
     80}
     81
     82DEFINE_SUITE("mem2node", mem2node);