Re: [Xen-devel] [RFC 6/6] xen/arm: Replace early_printk call to printk call

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2014-02-20 at 11:01 +0000, Julien Grall wrote:
> 
> On 20/02/14 09:04, Ian Campbell wrote:
> > I was actually thinking more along the lines of a .word at a defined
> > offset which you could hex edit to a specific value to activate a
> > particular flavour of early printk handling. That would be sufficient
> > e.g. for osstest to activate the appropriate stuff for the specific
> > platform.
> 
> I don't see useful use case to have a such early printk implementation 
> in Xen. When the board is fully supported, failed at early stage (e.g 
> before console is initialized) is very unlikely. At least if you don't 
> play with memory.

a) there are boards which aren't fully supported, getting some debug out
of a distro package might be useful

b) even for boards which are fully supported there may still be bugs
which only appear under particular circumstances.

Ian.


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