Re: [PATCH v5 04/19] KVM: PPC: Move memslot memory allocation into prepare_memory_region()

[Peter Xu]

On Tue, Jan 21, 2020 at 02:31:42PM -0800, Sean Christopherson wrote:
>  static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,
> -					struct kvm_memory_slot *memslot,
> -					const struct kvm_userspace_memory_region *mem)
> +					struct kvm_memory_slot *slot,
> +					const struct kvm_userspace_memory_region *mem,
> +					enum kvm_mr_change change)
>  {
> +	unsigned long npages = mem->memory_size >> PAGE_SHIFT;

Only in case if this patch still needs a respin: IIUC we can directly
use slot->npages below.  No matter what:

Reviewed-by: Peter Xu <peterx@xxxxxxxxxx>

> +
> +	if (change == KVM_MR_CREATE) {
> +		slot->arch.rmap = vzalloc(array_size(npages,
> +					  sizeof(*slot->arch.rmap)));
> +		if (!slot->arch.rmap)
> +			return -ENOMEM;
> +	}
> +
>  	return 0;
>  }

-- 
Peter Xu