Re: [Qemu-ppc] [Qemu-devel] [PATCH 2/5] target-ppc: Register and handle HCALL to receive updated RTAS region

[David Gibson]

On Mon, Aug 25, 2014 at 07:15:26PM +0530, Aravinda Prasad wrote:
> Receive updates from SLOF about the updated rtas-base.
> A separate patch for SLOF [1] adds functionality to invoke a
> a private HCALL whenever OS issues instantiate-rtas with
> a new rtas-base.
> 
> This is required as qemu needs to know the updated rtas-base
> as it allocates error reporting structure in RTAS space upon
> a machine check exception.

This also seems really awkward.  Specifically it seems like a rather
arbitrary and complex division of what qemu's responsible for and what
SLOF is responsible for.

Instead I'd suggest that we add an H_INSTANTIATE_RTAS hcall, and we
move the loading of the spapr-rtas blob from normal reset to when that
hcall is invoked.

-- 
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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