From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Michael Ellerman <michaele@au1.ibm.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Valentin Schneider <valentin.schneider@arm.com>,
Nick Piggin <npiggin@au1.ibm.com>,
Oliver OHalloran <oliveroh@au1.ibm.com>,
Nathan Lynch <nathanl@linux.ibm.com>,
Michael Neuling <mikey@linux.ibm.com>,
Anton Blanchard <anton@au1.ibm.com>,
Gautham R Shenoy <ego@linux.vnet.ibm.com>,
Vaidyanathan Srinivasan <svaidy@linux.ibm.com>,
Jordan Niethe <jniethe5@gmail.com>
Subject: [PATCH v2 03/10] powerpc/smp: Move powerpc_topology above
Date: Tue, 21 Jul 2020 17:08:07 +0530 [thread overview]
Message-ID: <20200721113814.32284-4-srikar@linux.vnet.ibm.com> (raw)
In-Reply-To: <20200721113814.32284-1-srikar@linux.vnet.ibm.com>
Just moving the powerpc_topology description above.
This will help in using functions in this file and avoid declarations.
No other functional changes
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Valentin Schneider <valentin.schneider@arm.com>
Cc: Nick Piggin <npiggin@au1.ibm.com>
Cc: Oliver OHalloran <oliveroh@au1.ibm.com>
Cc: Nathan Lynch <nathanl@linux.ibm.com>
Cc: Michael Neuling <mikey@linux.ibm.com>
Cc: Anton Blanchard <anton@au1.ibm.com>
Cc: Gautham R Shenoy <ego@linux.vnet.ibm.com>
Cc: Vaidyanathan Srinivasan <svaidy@linux.ibm.com>
Cc: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
arch/powerpc/kernel/smp.c | 116 +++++++++++++++++++-------------------
1 file changed, 58 insertions(+), 58 deletions(-)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 0e0b118d9b6e..1ce95da00cb6 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -818,6 +818,64 @@ static int init_cpu_l1_cache_map(int cpu)
return err;
}
+static bool shared_caches;
+
+#ifdef CONFIG_SCHED_SMT
+/* cpumask of CPUs with asymmetric SMT dependency */
+static int powerpc_smt_flags(void)
+{
+ int flags = SD_SHARE_CPUCAPACITY | SD_SHARE_PKG_RESOURCES;
+
+ if (cpu_has_feature(CPU_FTR_ASYM_SMT)) {
+ printk_once(KERN_INFO "Enabling Asymmetric SMT scheduling\n");
+ flags |= SD_ASYM_PACKING;
+ }
+ return flags;
+}
+#endif
+
+/*
+ * P9 has a slightly odd architecture where pairs of cores share an L2 cache.
+ * This topology makes it *much* cheaper to migrate tasks between adjacent cores
+ * since the migrated task remains cache hot. We want to take advantage of this
+ * at the scheduler level so an extra topology level is required.
+ */
+static int powerpc_shared_cache_flags(void)
+{
+ return SD_SHARE_PKG_RESOURCES;
+}
+
+/*
+ * We can't just pass cpu_l2_cache_mask() directly because
+ * returns a non-const pointer and the compiler barfs on that.
+ */
+static const struct cpumask *shared_cache_mask(int cpu)
+{
+ if (shared_caches)
+ return cpu_l2_cache_mask(cpu);
+
+ if (has_big_cores)
+ return cpu_smallcore_mask(cpu);
+
+ return per_cpu(cpu_sibling_map, cpu);
+}
+
+#ifdef CONFIG_SCHED_SMT
+static const struct cpumask *smallcore_smt_mask(int cpu)
+{
+ return cpu_smallcore_mask(cpu);
+}
+#endif
+
+static struct sched_domain_topology_level powerpc_topology[] = {
+#ifdef CONFIG_SCHED_SMT
+ { cpu_smt_mask, powerpc_smt_flags, SD_INIT_NAME(SMT) },
+#endif
+ { shared_cache_mask, powerpc_shared_cache_flags, SD_INIT_NAME(CACHE) },
+ { cpu_cpu_mask, SD_INIT_NAME(DIE) },
+ { NULL, },
+};
+
static int init_big_cores(void)
{
int cpu;
@@ -1249,8 +1307,6 @@ static void add_cpu_to_masks(int cpu)
set_cpus_related(cpu, i, cpu_core_mask);
}
-static bool shared_caches;
-
/* Activate a secondary processor. */
void start_secondary(void *unused)
{
@@ -1314,62 +1370,6 @@ int setup_profiling_timer(unsigned int multiplier)
return 0;
}
-#ifdef CONFIG_SCHED_SMT
-/* cpumask of CPUs with asymmetric SMT dependency */
-static int powerpc_smt_flags(void)
-{
- int flags = SD_SHARE_CPUCAPACITY | SD_SHARE_PKG_RESOURCES;
-
- if (cpu_has_feature(CPU_FTR_ASYM_SMT)) {
- printk_once(KERN_INFO "Enabling Asymmetric SMT scheduling\n");
- flags |= SD_ASYM_PACKING;
- }
- return flags;
-}
-#endif
-
-/*
- * P9 has a slightly odd architecture where pairs of cores share an L2 cache.
- * This topology makes it *much* cheaper to migrate tasks between adjacent cores
- * since the migrated task remains cache hot. We want to take advantage of this
- * at the scheduler level so an extra topology level is required.
- */
-static int powerpc_shared_cache_flags(void)
-{
- return SD_SHARE_PKG_RESOURCES;
-}
-
-/*
- * We can't just pass cpu_l2_cache_mask() directly because
- * returns a non-const pointer and the compiler barfs on that.
- */
-static const struct cpumask *shared_cache_mask(int cpu)
-{
- if (shared_caches)
- return cpu_l2_cache_mask(cpu);
-
- if (has_big_cores)
- return cpu_smallcore_mask(cpu);
-
- return per_cpu(cpu_sibling_map, cpu);
-}
-
-#ifdef CONFIG_SCHED_SMT
-static const struct cpumask *smallcore_smt_mask(int cpu)
-{
- return cpu_smallcore_mask(cpu);
-}
-#endif
-
-static struct sched_domain_topology_level powerpc_topology[] = {
-#ifdef CONFIG_SCHED_SMT
- { cpu_smt_mask, powerpc_smt_flags, SD_INIT_NAME(SMT) },
-#endif
- { shared_cache_mask, powerpc_shared_cache_flags, SD_INIT_NAME(CACHE) },
- { cpu_cpu_mask, SD_INIT_NAME(DIE) },
- { NULL, },
-};
-
void __init smp_cpus_done(unsigned int max_cpus)
{
/*
--
2.17.1
next prev parent reply other threads:[~2020-07-21 11:40 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 11:38 [PATCH v2 00/10] Coregroup support on Powerpc Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 01/10] powerpc/smp: Cache node for reuse Srikar Dronamraju
2020-07-22 7:41 ` Michael Ellerman
2020-07-22 8:04 ` Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 02/10] powerpc/smp: Merge Power9 topology with Power topology Srikar Dronamraju
2020-07-22 5:48 ` Gautham R Shenoy
2020-07-21 11:38 ` Srikar Dronamraju [this message]
2020-07-21 11:38 ` [PATCH v2 04/10] powerpc/smp: Enable small core scheduling sooner Srikar Dronamraju
2020-07-22 5:59 ` Gautham R Shenoy
2020-07-22 6:59 ` Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 05/10] powerpc/smp: Dont assume l2-cache to be superset of sibling Srikar Dronamraju
2020-07-22 6:21 ` Gautham R Shenoy
2020-07-22 6:57 ` Srikar Dronamraju
2020-07-24 7:10 ` Gautham R Shenoy
2020-07-21 11:38 ` [PATCH v2 06/10] powerpc/smp: Generalize 2nd sched domain Srikar Dronamraju
2020-07-22 6:56 ` Gautham R Shenoy
2020-07-22 7:39 ` Srikar Dronamraju
2020-07-22 7:46 ` peterz
2020-07-22 8:18 ` Srikar Dronamraju
2020-07-22 8:48 ` Peter Zijlstra
2020-07-22 8:54 ` peterz
2020-07-21 11:38 ` [PATCH v2 07/10] Powerpc/numa: Detect support for coregroup Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 08/10] powerpc/smp: Allocate cpumask only after searching thread group Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 09/10] Powerpc/smp: Create coregroup domain Srikar Dronamraju
2020-07-22 7:04 ` Gautham R Shenoy
2020-07-22 7:29 ` Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 10/10] powerpc/smp: Implement cpu_to_coregroup_id Srikar Dronamraju
2020-07-22 7:06 ` Gautham R Shenoy
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