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ACPI / processor: Introduce apic_id in struct processor to save parsed APIC id

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For cpu hot add, we evaluate _MAT or parse MADT twice to get APIC id,
here is the code logic:
acpi_processor_add()
	acpi_processor_get_info()
		acpi_get_cpuid() will evaluate _MAT or parse MADT;
	acpi_processor_hotadd_init()
		acpi_map_lsapic() will evaluate _MAT again;

This can be done more effectively, this patch introduces apic_id in struct
processor to save parsed APIC id, and then we can use it and remove the
duplicated _MAT evaluation.

Signed-off-by: Jiang Liu <[email protected]>
Signed-off-by: Hanjun Guo <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Jiang Liu 2013-09-02 11:57:34 +08:00 • committed by Rafael J. Wysocki
commit ca9f62ac78
3 changed files with 27 additions and 6 deletions
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3
include/acpi/processor.h
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@ -199,6 +199,7 @@ struct acpi_processor_flags {
struct acpi_processor {
acpi_handle handle;
u32 acpi_id;
u32 apic_id;
u32 id;
u32 pblk;
int performance_platform_limit;
@ -314,6 +315,8 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
/* in processor_core.c */
void acpi_processor_set_pdc(acpi_handle handle);
int acpi_get_apicid(acpi_handle, int type, u32 acpi_id);
int acpi_map_cpuid(int apic_id, u32 acpi_id);
int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
/* in processor_throttling.c */