Commit 3b1313eb authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by Paul Burton

mips: cacheinfo: report shared CPU map

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: default avatarVladimir Kondratiev <vladimir.kondratiev@intel.com>
Signed-off-by: default avatarPaul 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
parent a8d0f11e
......@@ -50,6 +50,25 @@ static int __init_cache_level(unsigned int cpu)
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 = &current_cpu_data;
......@@ -57,14 +76,20 @@ static int __populate_cache_leaves(unsigned int 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)
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);
......
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