• Lukasz Anaczkowski's avatar
    ACPI / SRAT: fix SRAT parsing order with both LAPIC and X2APIC present · 702b07fc
    Lukasz Anaczkowski authored
    SRAT maps APIC ID to proximity domains ids (PXM). Mapping from PXM to
    NUMA node ids is based on order of entries in SRAT table.
    SRAT table has just LAPIC entires or mix of LAPIC and X2APIC entries.
    As long as there are only LAPIC entires, mapping from proximity domain
    id to NUMA node id is as assumed by BIOS. However, once APIC entries are
    mixed, X2APIC entries would be first mapped which causes unexpected NUMA
    node mapping.
    
    To fix that, change parsing to check each entry against both LAPIC and
    X2APIC so mapping is in the SRAT/PXM order.
    
    This is supplemental change to the fix made by commit d81056b5
    (Handle apic/x2apic entries in MADT in correct order) and using the
    mechanism introduced by 9b3fedde (ACPI / tables: Add acpi_subtable_proc
    to ACPI table parsers).
    
    Fixes: d81056b5 (Handle apic/x2apic entries in MADT in correct order)
    Signed-off-by: default avatarLukasz Anaczkowski <lukasz.anaczkowski@intel.com>
    [ rjw : Subject & changelog ]
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    702b07fc
numa.c 9.7 KB