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    SubjectRe: [PATCH 0/3] Boot IRQ quirks for Broadcom and AMD/ATI

    * Olaf Dabrunz <> wrote:

    > This is against linux-2.6-tip, branch pci-ioapic-boot-irq-quirks.
    > The corrected versions of the Broadcom and AMD/ATI boot IRQ quirks,
    > and a patch that uses DECLARE_PCI_FIXUP_FINAL instead of *_EARLY, and
    > adds *_RESUME.
    > The AMD/ATI SB700S does not need a quirk. The boot IRQs here are
    > active even when the IO-APIC lines are not masked. So even for
    > traditional IRQ handling that does not use masking, the boot IRQs need
    > to be disabled by the BIOS. If there are actual cases of BIOSes that
    > do not disable these boot IRQs in APIC mode, we could consider
    > including an SB700S patch. But I doubt this will be needed, as this
    > problem would quickly surface during testing with any general-purpose
    > OS.
    > The quirk for the AMD 8131 and AMD 8132 takes identical action as an
    > existing quirk for the AMD 8131 rev. A0 and B0. The existing quirk is
    > due to an AMD erratum to fix IO-APIC mode. Our patch now deletes the
    > older quirk and adds a comment to the new one that describes the two
    > purposes of the quirk.

    applied to tip/x86/pci-ioapic-boot-irq-quirks, thanks Olaf.

    Jesse, what do you think about this topic? We are keeping it separate
    for the time being. They are not particularly pretty, but being able to
    mask/unmask irqs (without generating those legacy IRQs and creating an
    IRQ storm) is essential to -rt.


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