// 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 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 = 0 ;
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 = 0 ;
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 , PHYS_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(PHYS_MEM_SIZE);
assert(memory_block.base);
fill_memblock();
}
void dummy_physical_memory_cleanup(void )
{
free(memory_block.base);
}
phys_addr_t dummy_physical_memory_base(void )
{
return (phys_addr_t)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--;
}
}
Messung V0.5 in Prozent C=85 H=93 G=88
¤ Dauer der Verarbeitung: 0.4 Sekunden
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