diff options
| author | James Morse <james.morse@arm.com> | 2021-07-02 15:47:38 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-11-15 10:11:52 +0000 |
| commit | a85988befb6841a51ce77062663de73a38eefb21 (patch) | |
| tree | 2ab72e76370e02204e206d35e117ac55157f6df5 /include/linux/acpi.h | |
| parent | e685105f0b1efbd4771bde4da0fa99f2780a55a7 (diff) | |
ACPI: Rename ACPI_HOTPLUG_CPU to include 'present'
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
Changes since RFC v3:
* Dropped ia64 changes
Diffstat (limited to 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 54189e0e5f41..e75313539ae0 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -301,12 +301,12 @@ 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); @@ -629,7 +629,7 @@ 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 |