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    SubjectRe: [PATCH HACK] powerpc: quick hack to get a functional eHEA with hardirq preemption, eHCA is close
    Date
    Hi,

    I think these are the "functional" changes that need to be included in
    the ibmebus driver. We'll add a RT flag in the final version to enable
    these changes only for RT-Linux for now.
    Ben, can you / your team look into the implementation
    of the set_irq_type functionality needed for XICS?

    Regards,
    Jan-Bernd & Christoph

    diff -Nurp b/arch/powerpc/kernel/ibmebus.c a/arch/powerpc/kernel/ibmebus.c
    --- b/arch/powerpc/kernel/ibmebus.c 2008-09-22 00:29:55.000000000 +0200
    +++ a/arch/powerpc/kernel/ibmebus.c 2008-09-23 12:04:53.000000000 +0200
    @@ -216,12 +216,16 @@ int ibmebus_request_irq(u32 ist, irq_han
    unsigned long irq_flags, const char *devname,
    void *dev_id)
    {
    + int ret;
    unsigned int irq = irq_create_mapping(NULL, ist);

    if (irq == NO_IRQ)
    return -EINVAL;

    - return request_irq(irq, handler, irq_flags, devname, dev_id);
    + ret = request_irq(irq, handler, irq_flags, devname, dev_id);
    + set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
    +
    + return ret;
    }
    EXPORT_SYMBOL(ibmebus_request_irq);




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