[Xen-devel] [PATCH] ACPI: add support for x2APIC ACPI extensions

["Han, Weidong" <weidong.han@xxxxxxxxx>]

(Most code is back ported from Linux Kernel.)

All logical processors with APIC ID values of 255 and greater will have their 
APIC reported through Processor X2APIC structure (type-9 entry type) and all 
logical processors with APIC ID less than 255 will have their APIC reported 
through legacy Processor Local APIC (type-0 entry type) only. This is the same 
case even for NMI structure reporting.

The Processor X2APIC Affinity structure provides the association between the 
X2APIC ID of a logical processor and the proximity domain to which the logical 
processor belongs.

This patch adds 2 new subtables to MADT and one new subtable to SRAT.

This patch also changes x86_acpiid_to_apicid from u8 to u32 for x2APIC ID, and 
changes mp_register_lapic to accept 32-bit id. But there are still some 8-bit 
apic id hardcode and assumptions in Xen code, it needs to be fixed in future.

Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

Attachment: x2apic-acpi.patch
Description: x2apic-acpi.patch

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