Re: [Qemu-devel] [PATCHv3 0/4] Start allowing ISA to be configured out

[David Gibson]

On Fri, Jan 15, 2016 at 11:21:20PM +1100, David Gibson wrote:
> Finally got around to respinning this series I last sent out ~6 months
> ago.
> 
> At the moment isa-bus.c is compiled unconditionally for all targets.
> However, some targets have never used legacy ISA devices.  Many more
> targets have at least some machine types without ISA.
> 
> These patches allow ISA bus to be disabled in the configuration, thus
> allowing cut down configurations for targets and machine types that
> don't have ISA.
> 
> Actually turning off ISA will require more than this for most targets
> - there are a number of non-obvious dependencies on the ISA code.
> b19c1c0 "isa: remove isa_mem_base variable" already got rid of an
> important one (VGA depended on ISA).  Patches 2/4 and 4/4 in this
> series remove some more.  There are a number more though, for example
> CONFIG_IDE_CORE depends on ISA and the HMP "info irq" command depends
> on I8259 code.
> 
> But, these patches patch should allow easier experimentation so we can
> chip away at those dependencies on legacy code in the future.

I'm not really sure how to go about moving this forward.

Michael, should this go through your tree, or should I send a pull
request direct to Peter?  If the latter, whose acks will I need?

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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