[RFC PATCH 14/32] ACPI: Rename ACPI_HOTPLUG_CPU to include 'present'

From: James Morse
Date: Fri Feb 03 2023 - 08:55:07 EST

Next message: James Morse: "[RFC PATCH 12/32] ACPI: processor: Register CPUs that are online, but not described in the DSDT"
Previous message: James Morse: "[RFC PATCH 11/32] ACPI: processor: Add support for processors described as container packages"
In reply to: James Morse: "[RFC PATCH 11/32] ACPI: processor: Add support for processors described as container packages"
Next in thread: James Morse: "[RFC PATCH 12/32] ACPI: processor: Register CPUs that are online, but not described in the DSDT"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

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@xxxxxxx>
---
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 146a2226e2a3..f02894cafef8 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 c05728044272..1e826ed3bd56 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 e1aaee2f8412..23620969dfc0 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 4845e5b525ac..702b1ff1b7ad 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 a93a6c4115c4..682721594820 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)
{
@@ -413,7 +413,7 @@ 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)
{
@@ -457,7 +457,7 @@ 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;
@@ -526,7 +526,7 @@ 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 5e6a876e17ba..0bc1eacd0dfc 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -327,12 +327,12 @@ 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);
@@ -655,7 +655,7 @@ 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 message: James Morse: "[RFC PATCH 12/32] ACPI: processor: Register CPUs that are online, but not described in the DSDT"
Previous message: James Morse: "[RFC PATCH 11/32] ACPI: processor: Add support for processors described as container packages"
In reply to: James Morse: "[RFC PATCH 11/32] ACPI: processor: Add support for processors described as container packages"
Next in thread: James Morse: "[RFC PATCH 12/32] ACPI: processor: Register CPUs that are online, but not described in the DSDT"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]