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Tue, 21 Jul 2020 11:39:15 +0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06LBdBGq59375864 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Jul 2020 11:39:11 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0B1FE4204D; Tue, 21 Jul 2020 11:39:11 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 55AFA42042; Tue, 21 Jul 2020 11:39:07 +0000 (GMT) Received: from srikart450.in.ibm.com (unknown [9.85.93.17]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 21 Jul 2020 11:39:07 +0000 (GMT) From: Srikar Dronamraju To: Michael Ellerman Subject: [PATCH v2 09/10] Powerpc/smp: Create coregroup domain Date: Tue, 21 Jul 2020 17:08:13 +0530 Message-Id: <20200721113814.32284-10-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200721113814.32284-1-srikar@linux.vnet.ibm.com> References: <20200721113814.32284-1-srikar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-21_05:2020-07-21, 2020-07-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxscore=0 spamscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 phishscore=0 mlxlogscore=999 suspectscore=0 bulkscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007210077 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nathan Lynch , Gautham R Shenoy , Oliver OHalloran , Michael Neuling , Srikar Dronamraju , Peter Zijlstra , Jordan Niethe , Anton Blanchard , LKML , Valentin Schneider , Nick Piggin , linuxppc-dev , Ingo Molnar Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add percpu coregroup maps and masks to create coregroup domain. If a coregroup doesn't exist, the coregroup domain will be degenerated in favour of SMT/CACHE domain. Cc: linuxppc-dev Cc: LKML Cc: Michael Ellerman Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Valentin Schneider Cc: Nick Piggin Cc: Oliver OHalloran Cc: Nathan Lynch Cc: Michael Neuling Cc: Anton Blanchard Cc: Gautham R Shenoy Cc: Vaidyanathan Srinivasan Cc: Jordan Niethe Signed-off-by: Srikar Dronamraju --- Changelog v1 -> v2: Powerpc/smp: Create coregroup domain Moved coregroup topology fixup to fixup_topology (Gautham) arch/powerpc/include/asm/topology.h | 10 ++++++++ arch/powerpc/kernel/smp.c | 38 +++++++++++++++++++++++++++++ arch/powerpc/mm/numa.c | 5 ++++ 3 files changed, 53 insertions(+) diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index f0b6300e7dd3..6609174918ab 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -88,12 +88,22 @@ static inline int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) extern int find_and_online_cpu_nid(int cpu); +extern int cpu_to_coregroup_id(int cpu); #else static inline int find_and_online_cpu_nid(int cpu) { return 0; } +static inline int cpu_to_coregroup_id(int cpu) +{ +#ifdef CONFIG_SMP + return cpu_to_core_id(cpu); +#else + return 0; +#endif +} + #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */ #include diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 97b762a1944a..a7e1366b7fd3 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -80,6 +80,7 @@ DEFINE_PER_CPU(cpumask_var_t, cpu_sibling_map); DEFINE_PER_CPU(cpumask_var_t, cpu_smallcore_map); DEFINE_PER_CPU(cpumask_var_t, cpu_l2_cache_map); DEFINE_PER_CPU(cpumask_var_t, cpu_core_map); +DEFINE_PER_CPU(cpumask_var_t, cpu_coregroup_map); EXPORT_PER_CPU_SYMBOL(cpu_sibling_map); EXPORT_PER_CPU_SYMBOL(cpu_l2_cache_map); @@ -91,6 +92,7 @@ enum { smt_idx, #endif bigcore_idx, + mc_idx, die_idx, }; @@ -869,6 +871,21 @@ static const struct cpumask *smallcore_smt_mask(int cpu) } #endif +static struct cpumask *cpu_coregroup_mask(int cpu) +{ + return per_cpu(cpu_coregroup_map, cpu); +} + +static bool has_coregroup_support(void) +{ + return coregroup_enabled; +} + +static const struct cpumask *cpu_mc_mask(int cpu) +{ + return cpu_coregroup_mask(cpu); +} + static const struct cpumask *cpu_bigcore_mask(int cpu) { return per_cpu(cpu_sibling_map, cpu); @@ -879,6 +896,7 @@ static struct sched_domain_topology_level powerpc_topology[] = { { cpu_smt_mask, powerpc_smt_flags, SD_INIT_NAME(SMT) }, #endif { cpu_bigcore_mask, SD_INIT_NAME(BIGCORE) }, + { cpu_mc_mask, SD_INIT_NAME(MC) }, { cpu_cpu_mask, SD_INIT_NAME(DIE) }, { NULL, }, }; @@ -927,6 +945,10 @@ void __init smp_prepare_cpus(unsigned int max_cpus) GFP_KERNEL, node); zalloc_cpumask_var_node(&per_cpu(cpu_core_map, cpu), GFP_KERNEL, node); + if (has_coregroup_support()) + zalloc_cpumask_var_node(&per_cpu(cpu_coregroup_map, cpu), + GFP_KERNEL, node); + #ifdef CONFIG_NEED_MULTIPLE_NODES /* * numa_node_id() works after this. @@ -944,6 +966,9 @@ void __init smp_prepare_cpus(unsigned int max_cpus) cpumask_set_cpu(boot_cpuid, cpu_l2_cache_mask(boot_cpuid)); cpumask_set_cpu(boot_cpuid, cpu_core_mask(boot_cpuid)); + if (has_coregroup_support()) + cpumask_set_cpu(boot_cpuid, cpu_coregroup_mask(boot_cpuid)); + init_big_cores(); if (has_big_cores) { cpumask_set_cpu(boot_cpuid, @@ -1235,6 +1260,8 @@ static void remove_cpu_from_masks(int cpu) set_cpus_unrelated(cpu, i, cpu_sibling_mask); if (has_big_cores) set_cpus_unrelated(cpu, i, cpu_smallcore_mask); + if (has_coregroup_support()) + set_cpus_unrelated(cpu, i, cpu_coregroup_mask); } } #endif @@ -1295,6 +1322,14 @@ static void add_cpu_to_masks(int cpu) add_cpu_to_smallcore_masks(cpu); update_mask_by_l2(cpu, cpu_l2_cache_mask); + if (has_coregroup_support()) { + cpumask_set_cpu(cpu, cpu_coregroup_mask(cpu)); + for_each_cpu(i, cpu_online_mask) { + if (cpu_to_coregroup_id(cpu) == cpu_to_coregroup_id(i)) + set_cpus_related(cpu, i, cpu_coregroup_mask); + } + } + if (pkg_id == -1) { struct cpumask *(*mask)(int) = cpu_sibling_mask; @@ -1386,6 +1421,9 @@ int setup_profiling_timer(unsigned int multiplier) static void fixup_topology(void) { + if (!has_coregroup_support()) + powerpc_topology[mc_idx].mask = cpu_bigcore_mask; + if (shared_caches) { pr_info("Using shared cache scheduler topology\n"); powerpc_topology[bigcore_idx].mask = shared_cache_mask; diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 3248160c0327..ef8aa580da21 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1216,6 +1216,11 @@ int find_and_online_cpu_nid(int cpu) return new_nid; } +int cpu_to_coregroup_id(int cpu) +{ + return cpu_to_core_id(cpu); +} + static int topology_update_init(void) { topology_inited = 1; -- 2.17.1