Re: [RFC/PATCH 21/22] KVM: s390: Add KVM HPAGE capability

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On 07.11.2017 11:07, Cornelia Huck wrote:
> On Mon,  6 Nov 2017 23:29:59 +0100
> Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx> wrote:
> 
>> KVM huge page backing support can not be easily tested under
>> s390. Currently testing is only possible after most of the guest has
>> already been set up.
>>
>> To indicate, that KVM has huge page backing support, we add the
>> KVM_CAP_S390_HPAGE capability. This does not mean, that transparent
>> huge pages are supported.
>>
>> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
>> ---
>>  include/uapi/linux/kvm.h | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
>> index 8388875..2cd359a 100644
>> --- a/include/uapi/linux/kvm.h
>> +++ b/include/uapi/linux/kvm.h
>> @@ -930,6 +930,7 @@ struct kvm_ppc_resize_hpt {
>>  #define KVM_CAP_PPC_SMT_POSSIBLE 147
>>  #define KVM_CAP_HYPERV_SYNIC2 148
>>  #define KVM_CAP_HYPERV_VP_INDEX 149
>> +#define KVM_CAP_S390_HPAGE 150
>>  
>>  #ifdef KVM_CAP_IRQ_ROUTING
>>  
> 
> Not looking into the rest of this patch set (for fear of my sanity :),
> but I think this needs to be documented in
> Documentation/virtual/kvm/api.txt.

I'll add it right away, before I forget it :)
Thanks for looking and risking your sanity.


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