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As suggested by Suresh Siddha and Yinghai Lu: For x2apic pre-enabled systems, apic driver is set already early through early_acpi_boot_init()/early_acpi_process_madt()/ acpi_parse_madt()/default_acpi_madt_oem_check() path so that apic_id_valid() checking will be sufficient during MADT and SRAT parsing. For non-x2apic pre-enabled systems, all apic ids should be less than 255. This allows us to substitute the checks in arch/x86/kernel/acpi/boot.c::acpi_parse_x2apic() and arch/x86/mm/srat.c::acpi_numa_x2apic_affinity_init() with apic->apic_id_valid(). In addition we can avoid feigning the x2apic cpu feature in the NumaChip apic code. The following apic drivers have separate apic_id_valid() functions which will accept x2apic type IDs : x2apic_phys x2apic_cluster x2apic_uv_x apic_numachip Signed-off-by: Steffen Persvold <sp@numascale.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Daniel J Blueman <daniel@numascale-asia.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Jack Steiner <steiner@sgi.com> Link: http://lkml.kernel.org/r/1331925935-13372-1-git-send-email-sp@numascale.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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