[PATCH 5/5] KVM: PPC: Book3s HV: Implement H_CLEAR_REF and H_CLEAR_MOD hcalls

[Alexander Graf]

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