Commit d78ef9d2 authored by Chengwen Feng's avatar Chengwen Feng Committed by Rafael J. Wysocki
Browse files

LoongArch: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval 



As a step towards unifying the interface for retrieving ACPI CPU UID
across architectures, introduce a new function acpi_get_cpu_uid() for
loongarch. While at it, add input validation to make the code more
robust.

Signed-off-by: default avatarChengwen Feng <fengchengwen@huawei.com>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20260401081640.26875-3-fengchengwen@huawei.com


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 7cd5f565

arch/loongarch/include/asm/acpi.h

+1 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ static inline u32 get_acpi_id_for_cpu(unsigned int cpu) 
{

	return acpi_core_pic[cpu_logical_map(cpu)].processor_id;

}

int acpi_get_cpu_uid(unsigned int cpu, u32 *uid);



#endif /* !CONFIG_ACPI */

arch/loongarch/kernel/acpi.c

+9 −0
Original line number Diff line number Diff line
@@ -385,3 +385,12 @@ int acpi_unmap_cpu(int cpu) 
EXPORT_SYMBOL(acpi_unmap_cpu);



#endif /* CONFIG_ACPI_HOTPLUG_CPU */



int acpi_get_cpu_uid(unsigned int cpu, u32 *uid)

{

	if (cpu >= nr_cpu_ids)

		return -EINVAL;

	*uid = acpi_core_pic[cpu_logical_map(cpu)].processor_id;

	return 0;

}

EXPORT_SYMBOL_GPL(acpi_get_cpu_uid);