From: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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,
x86@kernel.org, linux-csky@vger.kernel.org,
linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-parisc@vger.kernel.org
Cc: Salil Mehta <salil.mehta@huawei.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
jianyong.wu@arm.com, justin.he@arm.com,
James Morse <james.morse@arm.com>,
Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Subject: [PATCH 22/39] ACPI: Rename ACPI_HOTPLUG_CPU to include 'present'
Date: Tue, 24 Oct 2023 16:18:02 +0100 [thread overview]
Message-ID: <E1qvJAQ-00AqQy-G0@rmk-PC.armlinux.org.uk> (raw)
In-Reply-To: <ZTffkAdOqL2pI2la@shell.armlinux.org.uk>
From: James Morse <james.morse@arm.com>
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 <james.morse@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
Changes since RFC v2:
* Add Loongarch update
---
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/Kconfig | 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/linux/acpi.h | 6 +++---
12 files changed, 23 insertions(+), 23 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 06692e1c7c62..3b30305407ac 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 41e8fe55cd98..381ce50fa54c 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/Kconfig b/arch/loongarch/Kconfig
index 5bed51adc68c..754c22214c4c 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -5,7 +5,7 @@ config LOONGARCH
select ACPI
select ACPI_GENERIC_GSI if ACPI
select ACPI_MCFG if ACPI
- select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU
+ select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU
select ACPI_PPTT if ACPI
select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
select ARCH_BINFMT_ELF_STATE
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 8e00a754e548..dfa56119b56f 100644
--- a/arch/loongarch/kernel/acpi.c
+++ b/arch/loongarch/kernel/acpi.c
@@ -288,7 +288,7 @@ 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 <acpi/processor.h>
@@ -340,4 +340,4 @@ 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 a11c0aea5176..2a859f597a94 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 <acpi/processor.h>
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 e7ed4730cbbe..c8e960ff0aca 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -183,7 +183,7 @@ 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;
@@ -228,7 +228,7 @@ 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/linux/acpi.h b/include/linux/acpi.h
index ebfea7bf663d..48ee36086577 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -321,12 +321,12 @@ 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);
@@ -649,7 +649,7 @@ 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
--
2.30.2
next prev parent reply other threads:[~2023-10-24 15:21 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-24 15:15 [RFC PATCH v3 00/39] ACPI/arm64: add support for virtual cpuhotplug Russell King (Oracle)
2023-10-24 15:16 ` [PATCH 01/39] parisc: simplify smp_prepare_boot_cpu() Russell King (Oracle)
2023-10-24 15:16 ` [PATCH 02/39] ACPI: Use the acpi_device_is_present() helper in more places Russell King
2023-10-24 15:16 ` [PATCH 03/39] ACPI: Rename acpi_scan_device_not_present() to be about enumeration Russell King
2023-10-24 15:16 ` [PATCH 04/39] arm64, irqchip/gic-v3, ACPI: Move MADT GICC enabled check into a helper Russell King
2023-10-24 15:16 ` [PATCH 05/39] ACPI: Move ACPI_HOTPLUG_CPU to be disabled on arm64 and riscv Russell King
2023-10-24 15:16 ` [PATCH 06/39] drivers: base: Use present CPUs in GENERIC_CPU_DEVICES Russell King
2023-10-24 15:16 ` [PATCH 07/39] drivers: base: Allow parts of GENERIC_CPU_DEVICES to be overridden Russell King
2023-10-24 15:16 ` [PATCH 08/39] drivers: base: Move cpu_dev_init() after node_dev_init() Russell King
2023-10-24 15:16 ` [PATCH 09/39] drivers: base: remove unnecessary call to register_cpu_under_node() Russell King (Oracle)
2023-10-24 15:17 ` [PATCH 10/39] drivers: base: Print a warning instead of panic() when register_cpu() fails Russell King
2023-10-24 15:17 ` [PATCH 11/39] arm64: setup: Switch over to GENERIC_CPU_DEVICES using arch_register_cpu() Russell King
2023-10-24 15:17 ` [PATCH 12/39] ia64/topology: Switch over to GENERIC_CPU_DEVICES Russell King
2023-10-24 15:17 ` [PATCH 13/39] x86: intel_epb: Don't rely on link order Russell King
2023-10-24 15:17 ` [PATCH 14/39] x86/topology: Switch over to GENERIC_CPU_DEVICES Russell King
2023-10-24 15:17 ` [PATCH 15/39] LoongArch: " Russell King
2023-10-24 15:17 ` [PATCH 16/39] riscv: " Russell King
2023-10-24 15:17 ` [PATCH 17/39] arch_topology: Make register_cpu_capacity_sysctl() tolerant to late CPUs Russell King
2023-10-24 15:17 ` [PATCH 18/39] ACPI: Only enumerate enabled (or functional) devices Russell King
2023-10-24 18:07 ` Rafael J. Wysocki
2023-10-24 15:17 ` [PATCH 19/39] ACPI: processor: Add support for processors described as container packages Russell King
2023-10-24 15:17 ` [PATCH 20/39] ACPI: processor: Register CPUs that are online, but not described in the DSDT Russell King
2023-10-24 15:17 ` [PATCH 21/39] ACPI: processor: Register all CPUs from acpi_processor_get_info() Russell King
2023-10-24 15:18 ` Russell King [this message]
2023-10-24 15:18 ` [PATCH 23/39] drivers: base: Implement weak arch_unregister_cpu() Russell King
2023-10-24 15:18 ` [PATCH 24/39] ACPI: Move acpi_bus_trim_one() before acpi_scan_hot_remove() Russell King
2023-10-24 15:18 ` [PATCH 25/39] ACPI: Rename acpi_processor_hotadd_init and remove pre-processor guards Russell King
2023-10-24 15:18 ` [PATCH 26/39] ACPI: Add post_eject to struct acpi_scan_handler for cpu hotplug Russell King
2023-10-24 15:18 ` [PATCH 27/39] ACPI: Check _STA present bit before making CPUs not present Russell King
2023-10-24 15:18 ` [PATCH 28/39] ACPI: Warn when the present bit changes but the feature is not enabled Russell King
2023-10-24 15:18 ` [PATCH 29/39] LoongArch: Use the __weak version of arch_unregister_cpu() Russell King
2023-10-24 15:18 ` [PATCH 30/39] arm64: acpi: Move get_cpu_for_acpi_id() to a header Russell King
2023-10-24 15:18 ` [PATCH 31/39] ACPICA: Add new MADT GICC flags fields Russell King
2023-10-24 15:18 ` [PATCH 32/39] irqchip/gic-v3: Don't return errors from gic_acpi_match_gicc() Russell King
2023-10-24 15:18 ` [PATCH 33/39] irqchip/gic-v3: Add support for ACPI's disabled but 'online capable' CPUs Russell King
2023-10-24 15:19 ` [PATCH 34/39] arm64: psci: Ignore DENIED CPUs Russell King
2023-11-16 7:45 ` Jianyong Wu
2023-11-20 9:24 ` Russell King (Oracle)
2023-11-20 9:36 ` Jianyong Wu
2023-11-20 9:58 ` Russell King (Oracle)
2023-11-21 1:44 ` Jianyong Wu
2023-10-24 15:19 ` [PATCH 35/39] ACPI: add support to register CPUs based on the _STA enabled bit Russell King
2023-10-24 15:19 ` [PATCH 36/39] arm64: document virtual CPU hotplug's expectations Russell King
2023-10-24 15:19 ` [PATCH 37/39] ACPI: Add _OSC bits to advertise OS support for toggling CPU present/enabled Russell King
2023-10-24 15:19 ` [PATCH 38/39] cpumask: Add enabled cpumask for present CPUs that can be brought online Russell King
2023-10-24 15:32 ` Andy Shevchenko
2023-10-24 16:02 ` Greg Kroah-Hartman
2023-10-24 16:05 ` Russell King (Oracle)
2023-10-24 15:19 ` [PATCH 39/39] ACPI: processor: Only call arch_unregister_cpu() if HOTPLUG_CPU is selected Russell King
2023-10-24 16:31 ` [RFC PATCH v3 00/39] ACPI/arm64: add support for virtual cpuhotplug Russell King (Oracle)
2023-10-24 18:26 ` Rafael J. Wysocki
2023-10-24 19:28 ` Russell King (Oracle)
2023-12-04 18:23 ` Russell King (Oracle)
2023-12-12 19:58 ` Russell King (Oracle)
2023-12-12 20:05 ` Rafael J. Wysocki
2023-12-12 20:16 ` Russell King (Oracle)
2023-10-30 16:41 ` Miguel Luis
2023-10-30 17:51 ` Russell King (Oracle)
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