On 15.12.2011, at 13:04, Paul Mackerras wrote:

> This adds implementations for the H_CLEAR_REF (test and clear reference
> bit) and H_CLEAR_MOD (test and clear changed bit) hypercalls.  These
> hypercalls are not used by Linux guests at this stage, and these
> implementations are only compile tested.

Do we need them then? Are they mandatory in PAPR? I don't feel all that great 
having unused / untested code accessible from the guest.

Alex

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