forked from luck/tmp_suning_uos_patched
3b1313eb32
Report L1 caches as shared per core; L2 - per cluster. This fixes "perf" that went crazy if shared_cpu_map attribute not reported on sysfs, in form of /sys/devices/system/cpu/cpu*/cache/index*/shared_cpu_list /sys/devices/system/cpu/cpu*/cache/index*/shared_cpu_map Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@intel.com> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* MIPS cacheinfo support
|
|
*/
|
|
#include <linux/cacheinfo.h>
|
|
|
|
/* Populates leaf and increments to next leaf */
|
|
#define populate_cache(cache, leaf, c_level, c_type) \
|
|
do { \
|
|
leaf->type = c_type; \
|
|
leaf->level = c_level; \
|
|
leaf->coherency_line_size = c->cache.linesz; \
|
|
leaf->number_of_sets = c->cache.sets; \
|
|
leaf->ways_of_associativity = c->cache.ways; \
|
|
leaf->size = c->cache.linesz * c->cache.sets * \
|
|
c->cache.ways; \
|
|
leaf++; \
|
|
} while (0)
|
|
|
|
static int __init_cache_level(unsigned int cpu)
|
|
{
|
|
struct cpuinfo_mips *c = ¤t_cpu_data;
|
|
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
|
int levels = 0, leaves = 0;
|
|
|
|
/*
|
|
* If Dcache is not set, we assume the cache structures
|
|
* are not properly initialized.
|
|
*/
|
|
if (c->dcache.waysize)
|
|
levels += 1;
|
|
else
|
|
return -ENOENT;
|
|
|
|
|
|
leaves += (c->icache.waysize) ? 2 : 1;
|
|
|
|
if (c->scache.waysize) {
|
|
levels++;
|
|
leaves++;
|
|
}
|
|
|
|
if (c->tcache.waysize) {
|
|
levels++;
|
|
leaves++;
|
|
}
|
|
|
|
this_cpu_ci->num_levels = levels;
|
|
this_cpu_ci->num_leaves = leaves;
|
|
return 0;
|
|
}
|
|
|
|
static void fill_cpumask_siblings(int cpu, cpumask_t *cpu_map)
|
|
{
|
|
int cpu1;
|
|
|
|
for_each_possible_cpu(cpu1)
|
|
if (cpus_are_siblings(cpu, cpu1))
|
|
cpumask_set_cpu(cpu1, cpu_map);
|
|
}
|
|
|
|
static void fill_cpumask_cluster(int cpu, cpumask_t *cpu_map)
|
|
{
|
|
int cpu1;
|
|
int cluster = cpu_cluster(&cpu_data[cpu]);
|
|
|
|
for_each_possible_cpu(cpu1)
|
|
if (cpu_cluster(&cpu_data[cpu1]) == cluster)
|
|
cpumask_set_cpu(cpu1, cpu_map);
|
|
}
|
|
|
|
static int __populate_cache_leaves(unsigned int cpu)
|
|
{
|
|
struct cpuinfo_mips *c = ¤t_cpu_data;
|
|
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
|
struct cacheinfo *this_leaf = this_cpu_ci->info_list;
|
|
|
|
if (c->icache.waysize) {
|
|
/* L1 caches are per core */
|
|
fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
|
|
populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA);
|
|
fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
|
|
populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST);
|
|
} else {
|
|
populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED);
|
|
}
|
|
|
|
if (c->scache.waysize) {
|
|
/* L2 cache is per cluster */
|
|
fill_cpumask_cluster(cpu, &this_leaf->shared_cpu_map);
|
|
populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED);
|
|
}
|
|
|
|
if (c->tcache.waysize)
|
|
populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED);
|
|
|
|
this_cpu_ci->cpu_map_populated = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
|
|
DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)
|