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Commit 515afdcb authored by Hanjun Guo's avatar Hanjun Guo Committed by Rafael J. Wysocki
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ACPI / processor: Make it possible to get local x2apic id via _MAT 



Logical processors with APIC ID values of 255 and greater are
required to have a Processor Device object and must convey the
processor's APIC information to OSPM using the Processor Local
X2APIC structure, but not until ACPI 5.1, X2APIC structure was
not supported in _MAT method.

_MAT is needed for CPU hotplug and system with more than 255
CPUs will definitely need X2APIC structure, so add its support
in map_mat_entry() to make it possible to get local x2apic id
via _MAT based on ACPI 5.1.

Signed-off-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 64aa90f2

drivers/acpi/processor_core.c

+2 −0
Original line number Diff line number Diff line
@@ -135,6 +135,8 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) 
		map_lapic_id(header, acpi_id, &apic_id);

	} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {

		map_lsapic_id(header, type, acpi_id, &apic_id);

	} else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {

		map_x2apic_id(header, type, acpi_id, &apic_id);

	}



exit: