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Fri, 26 Jul 2024 20:13:39 +0000 Received: from CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::25a9:32c2:a7b0:de9e]) by CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::25a9:32c2:a7b0:de9e%4]) with mapi id 15.20.7784.020; Fri, 26 Jul 2024 20:13:39 +0000 From: Ankur Arora To: linux-pm@vger.kernel.org, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, pbonzini@redhat.com, wanpengli@tencent.com, vkuznets@redhat.com, rafael@kernel.org, daniel.lezcano@linaro.org, peterz@infradead.org, arnd@arndb.de, lenb@kernel.org, mark.rutland@arm.com, harisokn@amazon.com, mtosatti@redhat.com, sudeep.holla@arm.com, cl@gentwo.org, misono.tomohiro@fujitsu.com, joao.m.martins@oracle.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, ankur.a.arora@oracle.com Subject: [PATCH v6 02/10] cpuidle: rename ARCH_HAS_CPU_RELAX to ARCH_HAS_OPTIMIZED_POLL Date: Fri, 26 Jul 2024 13:13:24 -0700 Message-Id: <20240726201332.626395-3-ankur.a.arora@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240726201332.626395-1-ankur.a.arora@oracle.com> References: <20240726201332.626395-1-ankur.a.arora@oracle.com> X-ClientProxiedBy: BYAPR07CA0062.namprd07.prod.outlook.com (2603:10b6:a03:60::39) To CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO6PR10MB5409:EE_|CH3PR10MB7715:EE_ X-MS-Office365-Filtering-Correlation-Id: 7e03474b-c240-4f57-cb47-08dcadaf7052 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|1800799024; 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However, recent changes in poll_idle() mean that a higher level primitive -- smp_cond_load_relaxed() is used for polling. This would in-turn use cpu_relax() or an architecture specific implementation. Accordingly condition the polling drivers on ARCH_HAS_OPTIMIZED_POLL instead of ARCH_HAS_CPU_RELAX. While at it, make both intel-idle and cpuidle-haltpoll explicitly depend on ARCH_HAS_CPU_RELAX. Suggested-by: Will Deacon Signed-off-by: Ankur Arora --- arch/x86/Kconfig | 2 +- drivers/acpi/processor_idle.c | 4 ++-- drivers/cpuidle/Kconfig | 2 +- drivers/cpuidle/Makefile | 2 +- drivers/idle/Kconfig | 1 + include/linux/cpuidle.h | 2 +- 6 files changed, 7 insertions(+), 6 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1d7122a1883e..cf78da2ba8fb 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -372,7 +372,7 @@ config ARCH_MAY_HAVE_PC_FDC config GENERIC_CALIBRATE_DELAY def_bool y -config ARCH_HAS_CPU_RELAX +config ARCH_HAS_OPTIMIZED_POLL def_bool y config ARCH_HIBERNATION_POSSIBLE diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 831fa4a12159..44096406d65d 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -35,7 +35,7 @@ #include #endif -#define ACPI_IDLE_STATE_START (IS_ENABLED(CONFIG_ARCH_HAS_CPU_RELAX) ? 1 : 0) +#define ACPI_IDLE_STATE_START (IS_ENABLED(CONFIG_ARCH_HAS_OPTIMIZED_POLL) ? 1 : 0) static unsigned int max_cstate __read_mostly = ACPI_PROCESSOR_MAX_POWER; module_param(max_cstate, uint, 0400); @@ -782,7 +782,7 @@ static int acpi_processor_setup_cstates(struct acpi_processor *pr) if (max_cstate == 0) max_cstate = 1; - if (IS_ENABLED(CONFIG_ARCH_HAS_CPU_RELAX)) { + if (IS_ENABLED(CONFIG_ARCH_HAS_OPTIMIZED_POLL)) { cpuidle_poll_state_init(drv); count = 1; } else { diff --git a/drivers/cpuidle/Kconfig b/drivers/cpuidle/Kconfig index cac5997dca50..75f6e176bbc8 100644 --- a/drivers/cpuidle/Kconfig +++ b/drivers/cpuidle/Kconfig @@ -73,7 +73,7 @@ endmenu config HALTPOLL_CPUIDLE tristate "Halt poll cpuidle driver" - depends on X86 && KVM_GUEST + depends on X86 && KVM_GUEST && ARCH_HAS_OPTIMIZED_POLL select CPU_IDLE_GOV_HALTPOLL default y help diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index d103342b7cfc..f29dfd1525b0 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile @@ -7,7 +7,7 @@ obj-y += cpuidle.o driver.o governor.o sysfs.o governors/ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o obj-$(CONFIG_DT_IDLE_STATES) += dt_idle_states.o obj-$(CONFIG_DT_IDLE_GENPD) += dt_idle_genpd.o -obj-$(CONFIG_ARCH_HAS_CPU_RELAX) += poll_state.o +obj-$(CONFIG_ARCH_HAS_OPTIMIZED_POLL) += poll_state.o obj-$(CONFIG_HALTPOLL_CPUIDLE) += cpuidle-haltpoll.o ################################################################################## diff --git a/drivers/idle/Kconfig b/drivers/idle/Kconfig index 6707d2539fc4..6f9b1d48fede 100644 --- a/drivers/idle/Kconfig +++ b/drivers/idle/Kconfig @@ -4,6 +4,7 @@ config INTEL_IDLE depends on CPU_IDLE depends on X86 depends on CPU_SUP_INTEL + depends on ARCH_HAS_OPTIMIZED_POLL help Enable intel_idle, a cpuidle driver that includes knowledge of native Intel hardware idle features. The acpi_idle driver diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 3183aeb7f5b4..7e7e58a17b07 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -275,7 +275,7 @@ static inline void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev, } #endif -#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_ARCH_HAS_CPU_RELAX) +#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_ARCH_HAS_OPTIMIZED_POLL) void cpuidle_poll_state_init(struct cpuidle_driver *drv); #else static inline void cpuidle_poll_state_init(struct cpuidle_driver *drv) {}