Re: [PATCH] KVM: PPC: Implement extension to report number of memslots

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On 16/10/15 06:57, Nikunj A Dadhania wrote:
> QEMU assumes 32 memslots if this extension is not implemented. Although,
> current value of KVM_USER_MEM_SLOTS is 32, once KVM_USER_MEM_SLOTS
> changes QEMU would take a wrong value.
> 
> Signed-off-by: Nikunj A Dadhania <nikunj@xxxxxxxxxxxxxxxxxx>
> ---
>  arch/powerpc/kvm/powerpc.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index 2e51289..6fd2405 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -559,6 +559,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
>  		else
>  			r = num_online_cpus();
>  		break;
> +	case KVM_CAP_NR_MEMSLOTS:
> +		r = KVM_USER_MEM_SLOTS;
> +		break;
>  	case KVM_CAP_MAX_VCPUS:
>  		r = KVM_MAX_VCPUS;
>  		break;

Yes, we'll likely need this soon! 32 slots are not enough...

Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>

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