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 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.
Signed-off-by: James Morse james.morse@arm.com --- arch/ia64/Kconfig | 2 +- arch/ia64/include/asm/acpi.h | 2 +- arch/ia64/kernel/acpi.c | 6 +++--- arch/ia64/kernel/setup.c | 2 +- arch/x86/Kconfig | 2 +- arch/x86/kernel/acpi/boot.c | 4 ++-- drivers/acpi/Kconfig | 4 ++-- drivers/acpi/acpi_processor.c | 10 +++++----- include/linux/acpi.h | 6 +++--- 9 files changed, 19 insertions(+), 19 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 0a60c049c67a..d4eb8c8af2d9 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -15,7 +15,7 @@ config IA64 select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ACPI - select ACPI_HOTPLUG_CPU if ACPI + select ACPI_HOTPLUG_PRESENT_CPU if ACPI 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 87927eb824cc..2fcdfd4ecce8 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 96d13cb7c19f..38b3155ce8d9 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 @@ -822,7 +822,7 @@ 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 fd6301eafa9d..874b4104d99c 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/x86/Kconfig b/arch/x86/Kconfig index c140c64c87c1..6f6e4ac14bbf 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -59,7 +59,7 @@ config X86 # select ACPI_LEGACY_TABLES_LOOKUP if ACPI select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI - select ACPI_HOTPLUG_CPU if ACPI + select ACPI_HOTPLUG_PRESENT_CPU if ACPI 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 907cc98b1938..5a4869d6cd87 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -796,7 +796,7 @@ 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 <acpi/processor.h>
static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) @@ -845,7 +845,7 @@ 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 411601f34ffd..fdcc407abc30 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -307,7 +307,7 @@ 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 @@ -402,7 +402,7 @@ 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 4507934c45cd..6d6da38b730c 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -149,7 +149,7 @@ static int acpi_processor_errata(void) }
/* 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; @@ -194,7 +194,7 @@ 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) { @@ -414,7 +414,7 @@ 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) { @@ -458,7 +458,7 @@ 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_X86 static bool acpi_hwp_native_thermal_lvt_set; @@ -527,7 +527,7 @@ 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/linux/acpi.h b/include/linux/acpi.h index 6f64b2f3dc54..82c31a23ac3c 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -324,12 +324,12 @@ 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); @@ -650,7 +650,7 @@ 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