From patchwork Wed Sep 13 16:38:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Morse X-Patchwork-Id: 13383485 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C50AEE01E3 for ; Wed, 13 Sep 2023 16:40:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231347AbjIMQkj (ORCPT ); Wed, 13 Sep 2023 12:40:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231231AbjIMQjw (ORCPT ); Wed, 13 Sep 2023 12:39:52 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 58AE72134; Wed, 13 Sep 2023 09:39:29 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5612CC15; Wed, 13 Sep 2023 09:40:06 -0700 (PDT) Received: from merodach.members.linode.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 37C573F5A1; Wed, 13 Sep 2023 09:39:27 -0700 (PDT) From: James Morse To: linux-pm@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev Cc: x86@kernel.org, Salil Mehta , Russell King , Jean-Philippe Brucker , jianyong.wu@arm.com, justin.he@arm.com Subject: [RFC PATCH v2 18/35] ACPI: Rename ACPI_HOTPLUG_CPU to include 'present' Date: Wed, 13 Sep 2023 16:38:06 +0000 Message-Id: <20230913163823.7880-19-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230913163823.7880-1-james.morse@arm.com> References: <20230913163823.7880-1-james.morse@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The code behind ACPI_HOTPLUG_CPU allows a not-present CPU to become present. This isn't the only use of HOTPLUG_CPU. On arm64 and riscv CPUs can be taken offline as a power saving measure. On arm64 an offline CPU may be disabled by firmware, preventing it from being brought back online, but it remains present throughout. Adding code to prevent user-space trying to online these disabled CPUs needs some additional terminology. Rename the Kconfig symbol CONFIG_ACPI_HOTPLUG_PRESENT_CPU to reflect that it makes possible CPUs present. HOTPLUG_CPU is untouched as this is only about the ACPI mechanism. Signed-off-by: James Morse --- arch/ia64/Kconfig | 2 +- arch/ia64/include/asm/acpi.h | 2 +- arch/ia64/kernel/acpi.c | 6 +++--- arch/ia64/kernel/setup.c | 2 +- arch/loongarch/configs/loongson3_defconfig | 2 +- arch/loongarch/kernel/acpi.c | 4 ++-- arch/x86/Kconfig | 2 +- arch/x86/kernel/acpi/boot.c | 4 ++-- drivers/acpi/Kconfig | 4 ++-- drivers/acpi/acpi_processor.c | 10 +++++----- include/acpi/processor.h | 2 +- include/linux/acpi.h | 6 +++--- 12 files changed, 23 insertions(+), 23 deletions(-) diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index a3bfd42467ab..54972f9fe804 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -16,7 +16,7 @@ config IA64 select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ACPI - select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU + select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU select ACPI_NUMA if NUMA select ARCH_ENABLE_MEMORY_HOTPLUG select ARCH_ENABLE_MEMORY_HOTREMOVE diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h index 58500a964238..482ea994d1e1 100644 --- a/arch/ia64/include/asm/acpi.h +++ b/arch/ia64/include/asm/acpi.h @@ -52,7 +52,7 @@ extern unsigned int is_cpu_cpei_target(unsigned int cpu); extern void set_cpei_target_cpu(unsigned int cpu); extern unsigned int get_cpei_target_cpu(void); extern void prefill_possible_map(void); -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU extern int additional_cpus; #else #define additional_cpus 0 diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c index 15f6cfddcc08..35881bf4b016 100644 --- a/arch/ia64/kernel/acpi.c +++ b/arch/ia64/kernel/acpi.c @@ -194,7 +194,7 @@ acpi_parse_plat_int_src(union acpi_subtable_headers * header, return 0; } -#ifdef CONFIG_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU unsigned int can_cpei_retarget(void) { extern int cpe_vector; @@ -711,7 +711,7 @@ int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) /* * ACPI based hotplug CPU support */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) { #ifdef CONFIG_ACPI_NUMA @@ -820,7 +820,7 @@ int acpi_unmap_cpu(int cpu) return (0); } EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ACPI_NUMA static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth, diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 5a55ac82c13a..44591716d07b 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -569,7 +569,7 @@ setup_arch (char **cmdline_p) #ifdef CONFIG_ACPI_NUMA acpi_numa_init(); acpi_numa_fixup(); -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU prefill_possible_map(); #endif per_cpu_scan_finalize((cpumask_empty(&early_cpu_possible_map) ? diff --git a/arch/loongarch/configs/loongson3_defconfig b/arch/loongarch/configs/loongson3_defconfig index a3b52aaa83b3..ef3bc76313e4 100644 --- a/arch/loongarch/configs/loongson3_defconfig +++ b/arch/loongarch/configs/loongson3_defconfig @@ -59,7 +59,7 @@ CONFIG_ACPI_SPCR_TABLE=y CONFIG_ACPI_TAD=y CONFIG_ACPI_DOCK=y CONFIG_ACPI_IPMI=m -CONFIG_ACPI_HOTPLUG_CPU=y +CONFIG_ACPI_HOTPLUG_PRESENT_CPU=y CONFIG_ACPI_PCI_SLOT=y CONFIG_ACPI_HOTPLUG_MEMORY=y CONFIG_EFI_ZBOOT=y diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c index 9450e09073eb..b5153e395ad9 100644 --- a/arch/loongarch/kernel/acpi.c +++ b/arch/loongarch/kernel/acpi.c @@ -289,7 +289,7 @@ void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) memblock_reserve(addr, size); } -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU #include @@ -341,4 +341,4 @@ int acpi_unmap_cpu(int cpu) } EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 133ea5f561b5..295a7a3debb6 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -60,7 +60,7 @@ config X86 # select ACPI_LEGACY_TABLES_LOOKUP if ACPI select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI - select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU + select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU select ARCH_32BIT_OFF_T if X86_32 select ARCH_CLOCKSOURCE_INIT select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 2a0ea38955df..84dd4133754b 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -814,7 +814,7 @@ static void __init acpi_set_irq_model_ioapic(void) /* * ACPI based hotplug support for CPU */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU #include static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) @@ -863,7 +863,7 @@ int acpi_unmap_cpu(int cpu) return (0); } EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) { diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 8456d48ba702..417f9f3077d2 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -305,7 +305,7 @@ config ACPI_IPMI To compile this driver as a module, choose M here: the module will be called as acpi_ipmi. -config ACPI_HOTPLUG_CPU +config ACPI_HOTPLUG_PRESENT_CPU bool depends on ACPI_PROCESSOR && HOTPLUG_CPU select ACPI_CONTAINER @@ -399,7 +399,7 @@ config ACPI_PCI_SLOT config ACPI_CONTAINER bool "Container and Module Devices" - default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) + default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_PRESENT_CPU) help This driver supports ACPI Container and Module devices (IDs ACPI0004, PNP0A05, and PNP0A06). diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 867782bc50b0..75257fae10e7 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -182,7 +182,7 @@ static void __init acpi_pcc_cpufreq_init(void) {} #endif /* CONFIG_X86 */ /* Initialization */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU static int acpi_processor_hotadd_init(struct acpi_processor *pr) { unsigned long long sta; @@ -227,7 +227,7 @@ static inline int acpi_processor_hotadd_init(struct acpi_processor *pr) { return -ENODEV; } -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ static int acpi_processor_get_info(struct acpi_device *device) { @@ -461,7 +461,7 @@ static int acpi_processor_add(struct acpi_device *device, return result; } -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU /* Removal */ static void acpi_processor_remove(struct acpi_device *device) { @@ -505,7 +505,7 @@ static void acpi_processor_remove(struct acpi_device *device) free_cpumask_var(pr->throttling.shared_cpu_map); kfree(pr); } -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC bool __init processor_physically_present(acpi_handle handle) @@ -630,7 +630,7 @@ static const struct acpi_device_id processor_device_ids[] = { static struct acpi_scan_handler processor_handler = { .ids = processor_device_ids, .attach = acpi_processor_add, -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU .detach = acpi_processor_remove, #endif .hotplug = { diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 94181fe9780a..fd6913370c72 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -465,7 +465,7 @@ extern int acpi_processor_ffh_lpi_probe(unsigned int cpu); extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); #endif -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU extern int arch_register_cpu(int cpu); extern void arch_unregister_cpu(int cpu); #endif diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a73246c3c35e..651dd43976a9 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -316,12 +316,12 @@ static inline int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu, } #endif -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU /* Arch dependent functions for cpu hotplug support */ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu); int acpi_unmap_cpu(int cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr); @@ -644,7 +644,7 @@ static inline u32 acpi_osc_ctx_get_cxl_control(struct acpi_osc_context *context) #define ACPI_GSB_ACCESS_ATTRIB_RAW_PROCESS 0x0000000F /* Enable _OST when all relevant hotplug operations are enabled */ -#if defined(CONFIG_ACPI_HOTPLUG_CPU) && \ +#if defined(CONFIG_ACPI_HOTPLUG_PRESENT_CPU) && \ defined(CONFIG_ACPI_HOTPLUG_MEMORY) && \ defined(CONFIG_ACPI_CONTAINER) #define ACPI_HOTPLUG_OST