PPC host with a PCI root-complex

[Segher Boessenkool]

> We have a ppc host with a PCI root-complex across which there are  
> multiple PCI end points.
>
> An application running on the ppc host reading one of the device  
> memory regions (not DMA access but direct CPU read) causes a parity  
> error on the PCI interface controller.
>
> We think that the error should be propagated up as a machine-check  
> which is considered a non-recoverable system-wide error. However  
> with multiple PCI devices present we think that this is too generic  
> and could be reduced to be a critical-error which could be  
> recovered from.
>
> Are there any other approaches/thoughts keeping in mind that this  
> is PPC host and we're running a PCI-rootcomplex interface?

You can handle the machine check in a platform-specific way --
see ppc_md.machine_check_exception().


Segher