[RFC PATCH 01/10] KVM: PPC: BOOK3S: PR: Fix PURR and SPURR emulation

Aneesh Kumar K.V aneesh.kumar at linux.vnet.ibm.com
Fri Jan 31 21:38:39 EST 2014

Alexander Graf <agraf at suse.de> writes:

> On 01/28/2014 05:44 PM, Aneesh Kumar K.V wrote:
>> We definitely don't need to emulate mtspr, because both the registers
>> are hypervisor resource.
> This patch description doesn't cover what the patch actually does. It 
> changes the implementation from "always tell the guest it uses 100%" to 
> "give the guest an accurate amount of cpu time spent inside guest
> context".

Will fix that

> Also, I think we either go with full hyp semantics which means we also 
> emulate the offset or we go with no hyp awareness in the guest at all 
> which means we also don't emulate SPURR which is a hyp privileged
> register.

Can you clarify this ?

> Otherwise I like the patch :).


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