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// SPDX-License-Identifier: GPL-2.0-or-later
#include "tests/common.h"
#include <string.h>
#include <getopt.h>
#include <linux/memory_hotplug.h>
#include <linux/build_bug.h>
#define INIT_MEMBLOCK_REGIONS 128
#define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS
#define PREFIXES_MAX 15
#define DELIM ": "
#define BASIS 10000
static struct test_memory memory_block;
static const char __maybe_unused *prefixes[PREFIXES_MAX];
static int __maybe_unused nr_prefixes;
static const char *short_opts = "hmv";
static const struct option long_opts[] = {
{"help", 0, NULL, 'h'},
{"movable-node", 0, NULL, 'm'},
{"verbose", 0, NULL, 'v'},
{NULL, 0, NULL, 0}
};
static const char * const help_opts[] = {
"display this help message and exit",
"disallow allocations from regions marked as hotplugged\n\t\t\t"
"by simulating enabling the \"movable_node\" kernel\n\t\t\t"
"parameter",
"enable verbose output, which includes the name of the\n\t\t\t"
"memblock function being tested, the name of the test,\n\t\t\t"
"and whether the test passed or failed."
};
static int verbose;
/* sets global variable returned by movable_node_is_enabled() stub */
bool movable_node_enabled;
void reset_memblock_regions(void)
{
memset(memblock.memory.regions, 0,
memblock.memory.cnt * sizeof(struct memblock_region));
memblock.memory.cnt = 1;
memblock.memory.max = INIT_MEMBLOCK_REGIONS;
memblock.memory.total_size = 0;
memset(memblock.reserved.regions, 0,
memblock.reserved.cnt * sizeof(struct memblock_region));
memblock.reserved.cnt = 1;
memblock.reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS;
memblock.reserved.total_size = 0;
}
void reset_memblock_attributes(void)
{
memblock.memory.name = "memory";
memblock.reserved.name = "reserved";
memblock.bottom_up = false;
memblock.current_limit = MEMBLOCK_ALLOC_ANYWHERE;
}
static inline void fill_memblock(void)
{
memset(memory_block.base, 1, MEM_SIZE);
}
void setup_memblock(void)
{
reset_memblock_regions();
memblock_add((phys_addr_t)memory_block.base, MEM_SIZE);
fill_memblock();
}
/**
* setup_numa_memblock:
* Set up a memory layout with multiple NUMA nodes in a previously allocated
* dummy physical memory.
* @node_fracs: an array representing the fraction of MEM_SIZE contained in
* each node in basis point units (one hundredth of 1% or 1/10000).
* For example, if node 0 should contain 1/8 of MEM_SIZE,
* node_fracs[0] = 1250.
*
* The nids will be set to 0 through NUMA_NODES - 1.
*/
void setup_numa_memblock(const unsigned int node_fracs[])
{
phys_addr_t base;
int flags;
reset_memblock_regions();
base = (phys_addr_t)memory_block.base;
flags = (movable_node_is_enabled()) ? MEMBLOCK_NONE : MEMBLOCK_HOTPLUG;
for (int i = 0; i < NUMA_NODES; i++) {
assert(node_fracs[i] <= BASIS);
phys_addr_t size = MEM_SIZE * node_fracs[i] / BASIS;
memblock_add_node(base, size, i, flags);
base += size;
}
fill_memblock();
}
void dummy_physical_memory_init(void)
{
memory_block.base = malloc(MEM_SIZE);
assert(memory_block.base);
fill_memblock();
}
void dummy_physical_memory_cleanup(void)
{
free(memory_block.base);
}
static void usage(const char *prog)
{
BUILD_BUG_ON(ARRAY_SIZE(help_opts) != ARRAY_SIZE(long_opts) - 1);
printf("Usage: %s [-%s]\n", prog, short_opts);
for (int i = 0; long_opts[i].name; i++) {
printf(" -%c, --%-12s\t%s\n", long_opts[i].val,
long_opts[i].name, help_opts[i]);
}
exit(1);
}
void parse_args(int argc, char **argv)
{
int c;
while ((c = getopt_long_only(argc, argv, short_opts, long_opts,
NULL)) != -1) {
switch (c) {
case 'm':
movable_node_enabled = true;
break;
case 'v':
verbose = 1;
break;
default:
usage(argv[0]);
}
}
}
void print_prefixes(const char *postfix)
{
for (int i = 0; i < nr_prefixes; i++)
test_print("%s%s", prefixes[i], DELIM);
test_print(postfix);
}
void test_fail(void)
{
if (verbose) {
ksft_test_result_fail(": ");
print_prefixes("failed\n");
}
}
void test_pass(void)
{
if (verbose) {
ksft_test_result_pass(": ");
print_prefixes("passed\n");
}
}
void test_print(const char *fmt, ...)
{
if (verbose) {
int saved_errno = errno;
va_list args;
va_start(args, fmt);
errno = saved_errno;
vprintf(fmt, args);
va_end(args);
}
}
void prefix_reset(void)
{
memset(prefixes, 0, PREFIXES_MAX * sizeof(char *));
nr_prefixes = 0;
}
void prefix_push(const char *prefix)
{
assert(nr_prefixes < PREFIXES_MAX);
prefixes[nr_prefixes] = prefix;
nr_prefixes++;
}
void prefix_pop(void)
{
if (nr_prefixes > 0) {
prefixes[nr_prefixes - 1] = 0;
nr_prefixes--;
}
}
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