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* [PATCH AUTOSEL 4.19 01/11] mips: cacheinfo: report shared CPU map
@ 2020-01-10 22:05 Sasha Levin
  2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 02/11] MIPS: Prevent link failure with kcov instrumentation Sasha Levin
                   ` (8 more replies)
  0 siblings, 9 replies; 11+ messages in thread
From: Sasha Levin @ 2020-01-10 22:05 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Vladimir Kondratiev, Paul Burton, Ralf Baechle, James Hogan,
	linux-mips, Sasha Levin

From: Vladimir Kondratiev <vladimir.kondratiev@intel.com>

[ Upstream commit 3b1313eb32c499d46dc4c3e896d19d9564c879c4 ]

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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/mips/kernel/cacheinfo.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/arch/mips/kernel/cacheinfo.c b/arch/mips/kernel/cacheinfo.c
index 428ef2189203..3ea95568ece4 100644
--- a/arch/mips/kernel/cacheinfo.c
+++ b/arch/mips/kernel/cacheinfo.c
@@ -61,6 +61,25 @@ 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;
@@ -68,14 +87,20 @@ 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);
-- 
2.20.1


^ permalink raw reply related	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2020-01-10 22:07 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-10 22:05 [PATCH AUTOSEL 4.19 01/11] mips: cacheinfo: report shared CPU map Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 02/11] MIPS: Prevent link failure with kcov instrumentation Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 04/11] dmaengine: k3dma: Avoid null pointer traversal Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 05/11] s390/qeth: fix false reporting of VNIC CHAR config failure Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 06/11] s390/qeth: Fix vnicc_is_in_use if rx_bcast not set Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 07/11] hsr: reset network header when supervision frame is created Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 08/11] ioat: ioat_alloc_ring() failure handling Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 09/11] hexagon: parenthesize registers in asm predicates Sasha Levin
2020-01-10 22:05   ` Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 10/11] hexagon: work around compiler crash Sasha Levin
2020-01-10 22:05 ` [PATCH AUTOSEL 4.19 11/11] ocfs2: call journal flush to mark journal as empty after journal recovery when mount Sasha Levin

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