• Keir Fraser's avatar
    vt-d: enhance the support of Interrupt Remapping EIM and x2APIC · cda2f6c7
    Keir Fraser authored
    1) Clear Interrupt Remapping(IR) unit's CFI (Compatibility Format
    Interrupt) to enhance security;
    2) Move the iommu_setup() ahead and put it before we begin to use
    IOAPIC so we can make sure after we enable Interrupt Remapping, the
    later IOAPIC (and MSI) initialization would setup IOAPIC RTEs (and
    MSI) with remappable format;
    3) Enable x2APIC only when all VT-d engines support IR with EIM
    (Extended Interrupt Mode). EIM enables external devices to deliver
    interrupts to logical processor with >8-bit APIC ID.
    Signed-off-by: default avatarDexuan Cui <dexuan.cui@intel.com>
xensetup.c 21.2 KB