This layer provides Energy Aware Scheduling (EAS) patcheseel_5.1.0eel_5.0.3eel_5.0.2eel/5.1.0eel/5.0.3eel/5.0.25.1.05.0.35.0.2eel

For the moment only for Renesas R-Car Gen3 SoC's.
Can be expanded for other SoC's by setting the machine
feature biglittle and provide the relevant EAS patches.

Bug-AGL: SPEC-813

Change-Id: I2b5e69c515c33e57be19b30466fe208d7b8ac1a5
Signed-off-by: Frode Isaksen <fisaksen@baylibre.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch
new file mode 100644
index 0000000..546ac07
--- /dev/null
+++ b/meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch
@@ -0,0 +1,76 @@
+From a90c8ec93f298cccfbc4db29a8513675002da326 Mon Sep 17 00:00:00 2001
+From: Morten Rasmussen <morten.rasmussen@arm.com>
+Date: Fri, 2 Jan 2015 17:08:52 +0000
+Subject: [PATCH 52/92] sched: Highest energy aware balancing sched_domain
+ level pointer
+
+Add another member to the family of per-cpu sched_domain shortcut
+pointers. This one, sd_ea, points to the highest level at which energy
+model is provided. At this level and all levels below all sched_groups
+have energy model data attached.
+
+Partial energy model information is possible but restricted to providing
+energy model data for lower level sched_domains (sd_ea and below) and
+leaving load-balancing on levels above to non-energy-aware
+load-balancing. For example, it is possible to apply energy-aware
+scheduling within each socket on a multi-socket system and let normal
+scheduling handle load-balancing between sockets.
+
+cc: Ingo Molnar <mingo@redhat.com>
+cc: Peter Zijlstra <peterz@infradead.org>
+Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
+(cherry picked from commit c4eb7a2b0a1908a377fb063ecae89d7bacd6aa78)
+Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
+---
+ kernel/sched/core.c  | 10 ++++++++++
+ kernel/sched/sched.h |  1 +
+ 2 files changed, 11 insertions(+)
+
+diff --git a/kernel/sched/core.c b/kernel/sched/core.c
+index b450329..f2642d4 100644
+--- a/kernel/sched/core.c
++++ b/kernel/sched/core.c
+@@ -6001,11 +6001,13 @@ static void destroy_sched_domains(struct sched_domain *sd)
+ DEFINE_PER_CPU(struct sched_domain_shared *, sd_llc_shared);
+ DEFINE_PER_CPU(struct sched_domain *, sd_numa);
+ DEFINE_PER_CPU(struct sched_domain *, sd_asym);
++DEFINE_PER_CPU(struct sched_domain *, sd_ea);
+ 
+ static void update_top_cache_domain(int cpu)
+ {
+ 	struct sched_domain_shared *sds = NULL;
+ 	struct sched_domain *sd;
++	struct sched_domain *ea_sd = NULL;
+ 	int id = cpu;
+ 	int size = 1;
+ 
+@@ -6026,6 +6028,14 @@ static void update_top_cache_domain(int cpu)
+ 
+ 	sd = highest_flag_domain(cpu, SD_ASYM_PACKING);
+ 	rcu_assign_pointer(per_cpu(sd_asym, cpu), sd);
++
++	for_each_domain(cpu, sd) {
++		if (sd->groups->sge)
++			ea_sd = sd;
++		else
++			break;
++	}
++	rcu_assign_pointer(per_cpu(sd_ea, cpu), ea_sd);
+ }
+ 
+ /*
+diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
+index 46787bd..22b7cfd 100644
+--- a/kernel/sched/sched.h
++++ b/kernel/sched/sched.h
+@@ -892,6 +892,7 @@ static inline struct sched_domain *lowest_flag_domain(int cpu, int flag)
+ DECLARE_PER_CPU(struct sched_domain_shared *, sd_llc_shared);
+ DECLARE_PER_CPU(struct sched_domain *, sd_numa);
+ DECLARE_PER_CPU(struct sched_domain *, sd_asym);
++DECLARE_PER_CPU(struct sched_domain *, sd_ea);
+ 
+ struct sched_group_capacity {
+ 	atomic_t ref;
+-- 
+1.9.1
+