Re: [PATCH/RFC 5/9] s390 virtual console for guests

[Anthony Liguori <aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

Christian Borntraeger wrote:
> On Monday 14 May 2007 18:23, Christian Bornträger wrote:
>   
>> On Friday 11 May 2007 21:00, Anthony Liguori wrote:
>>     
>>> I think it would be better to use hvc_console as Xen now uses it too.
>>>       
>> I just had a look at hvc_console, and indeed this driver looks appropriate 
>>     
>
> As I started prototyping this frontend I realized that hvc_console requires 
> some interfaces, which are not present on s390, e.g. we have no request_irq 
> and free_irq. Dont know if hvc_console is still the right way to go for us. 
>   

It seems like request_irq is roughly the same as 
register_external_interrupt.  I suspect that you could get away with 
either patching hvc_console to use register_external_interrupt if 
CONFIG_S390 or perhaps providing a common interface.

I suspect that this is going to come up again for sharing other paravirt 
drivers.

Regards,

Anthony Liguori

> This needs more thinking. 
>
> Christian
>
>   


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