• Mark Rutland's avatar
    arm_pmu: explicitly enable/disable SPIs at hotplug · 6de3f791
    Mark Rutland authored
    To support ACPI systems, we need to request IRQs before CPUs are
    hotplugged, and thus we need to request IRQs before we know their
    associated PMU.
    
    This is problematic if a PMU IRQ is pending out of reset, as it may be
    taken before we know the PMU, and thus the IRQ handler won't be able to
    handle it, leaving it screaming.
    
    To avoid such problems, lets request all IRQs in a disabled state, and
    explicitly enable/disable them at hotplug time, when we're sure the PMU
    has been probed.
    Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    6de3f791
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