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

2008-09-23 Thread Jan-Bernd Themann 
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 00:29:55.0 +0200
+++ a/arch/powerpc/kernel/ibmebus.c 2008-09-23 12:04:53.0 +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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Re: [PATCH HACK] powerpc: quick hack to get a functional eHEA with hardirq preemption, eHCA is close

2008-09-18 Thread Sebastien Dugue 
On Thu, 18 Sep 2008 12:42:05 +0200 Christoph Raisch <[EMAIL PROTECTED]> wrote:

> 
> Sebastien Dugue <[EMAIL PROTECTED]> wrote on 18.09.2008 11:27:13:
> 
> >
> >   It would be really interresting to know if the eHCA exhibits the same
> > problem under -rt as it's the only other user of the ibmebus.
> > Unfortunately I don't have the hardware to test.
> >
> 
> eHCA is very close from the interrupt generation and handling perspective,
> so yes, could be an issue there as well.

  That's what I was speculating.

  Thanks,

  Sebastien.

> 
> 
> Gruss / Regards
> Christoph Raisch
> 
> 
> 
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Re: [PATCH HACK] powerpc: quick hack to get a functional eHEA with hardirq preemption, eHCA is close

2008-09-18 Thread Christoph Raisch 

Sebastien Dugue <[EMAIL PROTECTED]> wrote on 18.09.2008 11:27:13:

>
>   It would be really interresting to know if the eHCA exhibits the same
> problem under -rt as it's the only other user of the ibmebus.
> Unfortunately I don't have the hardware to test.
>

eHCA is very close from the interrupt generation and handling perspective,
so yes, could be an issue there as well.


Gruss / Regards
Christoph Raisch


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