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plugins/cache: Enable cache parameterization

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Enabled configuring both icache and dcache parameters using plugin
parameters.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210623125458.450462-3-ma.mandourr@gmail.com>
Message-Id: <20210709143005.1554-38-alex.bennee@linaro.org>
This commit is contained in:
Mahmoud Mandour 2021-07-09 15:30:02 +01:00 committed by Alex Bennée
parent e2c5557ce1
commit 86ae3a1daa
1 changed files with 46 additions and 1 deletions
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47
contrib/plugins/cache.c
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@ -99,8 +99,28 @@ static inline uint64_t extract_set(Cache *cache, uint64_t addr)
return (addr & cache->set_mask) >> cache->blksize_shift;
}
static const char *cache_config_error(int blksize, int assoc, int cachesize)
{
if (cachesize % blksize != 0) {
return "cache size must be divisible by block size";
} else if (cachesize % (blksize * assoc) != 0) {
return "cache size must be divisible by set size (assoc * block size)";
} else {
return NULL;
}
}
static bool bad_cache_params(int blksize, int assoc, int cachesize)
{
return (cachesize % blksize) != 0 || (cachesize % (blksize * assoc) != 0);
}
static Cache *cache_init(int blksize, int assoc, int cachesize)
{
if (bad_cache_params(blksize, assoc, cachesize)) {
return NULL;
}
Cache *cache;
int i;
uint64_t blk_mask;
@ -397,7 +417,19 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
for (i = 0; i < argc; i++) {
char *opt = argv[i];
if (g_str_has_prefix(opt, "limit=")) {
if (g_str_has_prefix(opt, "iblksize=")) {
iblksize = g_ascii_strtoll(opt + 9, NULL, 10);
} else if (g_str_has_prefix(opt, "iassoc=")) {
iassoc = g_ascii_strtoll(opt + 7, NULL, 10);
} else if (g_str_has_prefix(opt, "icachesize=")) {
icachesize = g_ascii_strtoll(opt + 11, NULL, 10);
} else if (g_str_has_prefix(opt, "dblksize=")) {
dblksize = g_ascii_strtoll(opt + 9, NULL, 10);
} else if (g_str_has_prefix(opt, "dassoc=")) {
dassoc = g_ascii_strtoll(opt + 7, NULL, 10);
} else if (g_str_has_prefix(opt, "dcachesize=")) {
dcachesize = g_ascii_strtoll(opt + 11, NULL, 10);
} else if (g_str_has_prefix(opt, "limit=")) {
limit = g_ascii_strtoll(opt + 6, NULL, 10);
} else {
fprintf(stderr, "option parsing failed: %s\n", opt);
@ -406,7 +438,20 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
}
dcache = cache_init(dblksize, dassoc, dcachesize);
if (!dcache) {
const char *err = cache_config_error(dblksize, dassoc, dcachesize);
fprintf(stderr, "dcache cannot be constructed from given parameters\n");
fprintf(stderr, "%s\n", err);
return -1;
}
icache = cache_init(iblksize, iassoc, icachesize);
if (!icache) {
const char *err = cache_config_error(iblksize, iassoc, icachesize);
fprintf(stderr, "icache cannot be constructed from given parameters\n");
fprintf(stderr, "%s\n", err);
return -1;
}
rng = g_rand_new();