diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0068-arm64-topology-Define-JUNO-energy-and-provide-it-to-.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0068-arm64-topology-Define-JUNO-energy-and-provide-it-to-.patch | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0068-arm64-topology-Define-JUNO-energy-and-provide-it-to-.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0068-arm64-topology-Define-JUNO-energy-and-provide-it-to-.patch new file mode 100644 index 0000000..809e37f --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0068-arm64-topology-Define-JUNO-energy-and-provide-it-to-.patch @@ -0,0 +1,171 @@ +From 5ef504e0ddfbc6856799fc6c342f36e0e4d18cbd Mon Sep 17 00:00:00 2001 +From: Juri Lelli <juri.lelli@arm.com> +Date: Tue, 10 Feb 2015 12:05:22 +0000 +Subject: [PATCH 68/92] arm64, topology: Define JUNO energy and provide it to + the scheduler + +This patch is only here to be able to test provisioning of energy related +data from an arch topology shim layer to the scheduler. Since there is no +code today which deals with extracting energy related data from the dtb or +acpi, and process it in the topology shim layer, the content of the +sched_group_energy structures as well as the idle_state and capacity_state +arrays are hard-coded here. + +This patch defines the sched_group_energy structure as well as the +idle_state and capacity_state array for the cluster (relates to sched +groups (sgs) in DIE sched domain level) and for the core (relates to sgs +in MC sd level) for a Cortex A53 as well as for a Cortex A57. +It further provides related implementations of the sched_domain_energy_f +functions (cpu_cluster_energy() and cpu_core_energy()). + +To be able to propagate this information from the topology shim layer to +the scheduler, the elements of the arm_topology[] table have been +provisioned with the appropriate sched_domain_energy_f functions. + +Signed-off-by: Juri Lelli <juri.lelli@arm.com> +(cherry picked from commit 037aceb5c5b768295bdda8f111ac9b0c8f97cc79) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + arch/arm64/kernel/topology.c | 118 ++++++++++++++++++++++++++++++++++++++++++- + 1 file changed, 116 insertions(+), 2 deletions(-) + +diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c +index a8d986e..a75db2b 100644 +--- a/arch/arm64/kernel/topology.c ++++ b/arch/arm64/kernel/topology.c +@@ -525,6 +525,120 @@ static int __init parse_dt_topology(void) + struct cpu_topology cpu_topology[NR_CPUS]; + EXPORT_SYMBOL_GPL(cpu_topology); + ++/* ++ * ARM JUNO specific energy cost model data. There are no unit requirements for ++ * the data. Data can be normalized to any reference point, but the ++ * normalization must be consistent. That is, one bogo-joule/watt must be the ++ * same quantity for all data, but we don't care what it is. ++ */ ++ ++static struct idle_state idle_states_cluster_a53[] = { ++ { .power = 56 }, /* arch_cpu_idle() (active idle) = WFI */ ++ { .power = 56 }, /* WFI */ ++ { .power = 56 }, /* cpu-sleep-0 */ ++ { .power = 17 }, /* cluster-sleep-0 */ ++}; ++ ++static struct idle_state idle_states_cluster_a57[] = { ++ { .power = 65 }, /* arch_cpu_idle() (active idle) = WFI */ ++ { .power = 65 }, /* WFI */ ++ { .power = 65 }, /* cpu-sleep-0 */ ++ { .power = 24 }, /* cluster-sleep-0 */ ++}; ++ ++static struct capacity_state cap_states_cluster_a53[] = { ++ /* Power per cluster */ ++ { .cap = 235, .power = 26, }, /* 450 MHz */ ++ { .cap = 303, .power = 30, }, /* 575 MHz */ ++ { .cap = 368, .power = 39, }, /* 700 MHz */ ++ { .cap = 406, .power = 47, }, /* 775 MHz */ ++ { .cap = 447, .power = 57, }, /* 850 Mhz */ ++}; ++ ++static struct capacity_state cap_states_cluster_a57[] = { ++ /* Power per cluster */ ++ { .cap = 417, .power = 24, }, /* 450 MHz */ ++ { .cap = 579, .power = 32, }, /* 625 MHz */ ++ { .cap = 744, .power = 43, }, /* 800 MHz */ ++ { .cap = 883, .power = 49, }, /* 950 MHz */ ++ { .cap = 1024, .power = 64, }, /* 1100 MHz */ ++}; ++ ++static struct sched_group_energy energy_cluster_a53 = { ++ .nr_idle_states = ARRAY_SIZE(idle_states_cluster_a53), ++ .idle_states = idle_states_cluster_a53, ++ .nr_cap_states = ARRAY_SIZE(cap_states_cluster_a53), ++ .cap_states = cap_states_cluster_a53, ++}; ++ ++static struct sched_group_energy energy_cluster_a57 = { ++ .nr_idle_states = ARRAY_SIZE(idle_states_cluster_a57), ++ .idle_states = idle_states_cluster_a57, ++ .nr_cap_states = ARRAY_SIZE(cap_states_cluster_a57), ++ .cap_states = cap_states_cluster_a57, ++}; ++ ++static struct idle_state idle_states_core_a53[] = { ++ { .power = 6 }, /* arch_cpu_idle() (active idle) = WFI */ ++ { .power = 6 }, /* WFI */ ++ { .power = 0 }, /* cpu-sleep-0 */ ++ { .power = 0 }, /* cluster-sleep-0 */ ++}; ++ ++static struct idle_state idle_states_core_a57[] = { ++ { .power = 15 }, /* arch_cpu_idle() (active idle) = WFI */ ++ { .power = 15 }, /* WFI */ ++ { .power = 0 }, /* cpu-sleep-0 */ ++ { .power = 0 }, /* cluster-sleep-0 */ ++}; ++ ++static struct capacity_state cap_states_core_a53[] = { ++ /* Power per cpu */ ++ { .cap = 235, .power = 33, }, /* 450 MHz */ ++ { .cap = 302, .power = 46, }, /* 575 MHz */ ++ { .cap = 368, .power = 61, }, /* 700 MHz */ ++ { .cap = 406, .power = 76, }, /* 775 MHz */ ++ { .cap = 447, .power = 93, }, /* 850 Mhz */ ++}; ++ ++static struct capacity_state cap_states_core_a57[] = { ++ /* Power per cpu */ ++ { .cap = 417, .power = 168, }, /* 450 MHz */ ++ { .cap = 579, .power = 251, }, /* 625 MHz */ ++ { .cap = 744, .power = 359, }, /* 800 MHz */ ++ { .cap = 883, .power = 479, }, /* 950 MHz */ ++ { .cap = 1024, .power = 616, }, /* 1100 MHz */ ++}; ++ ++static struct sched_group_energy energy_core_a53 = { ++ .nr_idle_states = ARRAY_SIZE(idle_states_core_a53), ++ .idle_states = idle_states_core_a53, ++ .nr_cap_states = ARRAY_SIZE(cap_states_core_a53), ++ .cap_states = cap_states_core_a53, ++}; ++ ++static struct sched_group_energy energy_core_a57 = { ++ .nr_idle_states = ARRAY_SIZE(idle_states_core_a57), ++ .idle_states = idle_states_core_a57, ++ .nr_cap_states = ARRAY_SIZE(cap_states_core_a57), ++ .cap_states = cap_states_core_a57, ++}; ++ ++/* sd energy functions */ ++static inline ++const struct sched_group_energy * const cpu_cluster_energy(int cpu) ++{ ++ return cpu_topology[cpu].cluster_id ? &energy_cluster_a53 : ++ &energy_cluster_a57; ++} ++ ++static inline ++const struct sched_group_energy * const cpu_core_energy(int cpu) ++{ ++ return cpu_topology[cpu].cluster_id ? &energy_core_a53 : ++ &energy_core_a57; ++} ++ + const struct cpumask *cpu_coregroup_mask(int cpu) + { + return &cpu_topology[cpu].core_sibling; +@@ -636,9 +750,9 @@ static void __init reset_cpu_topology(void) + + static struct sched_domain_topology_level arm64_topology[] = { + #ifdef CONFIG_SCHED_MC +- { cpu_coregroup_mask, cpu_coregroup_flags, SD_INIT_NAME(MC) }, ++ { cpu_coregroup_mask, cpu_coregroup_flags, cpu_core_energy, SD_INIT_NAME(MC) }, + #endif +- { cpu_cpu_mask, cpu_cpu_flags, SD_INIT_NAME(DIE) }, ++ { cpu_cpu_mask, cpu_cpu_flags, cpu_cluster_energy, SD_INIT_NAME(DIE) }, + { NULL, } + }; + +-- +1.9.1 + |