linux-kernel - Re: [RFC PATCH v1 06/37] KVM: guest_memfd: Update kvm_gmem

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Message-ID: <aRG35j3OhMvQo85n@yzhao56-desk.sh.intel.com>
Date: Mon, 10 Nov 2025 18:01:10 +0800
From: Yan Zhao <yan.y.zhao@...el.com>
To: Ackerley Tng <ackerleytng@...gle.com>
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Subject: Re: [RFC PATCH v1 06/37] KVM: guest_memfd: Update
 kvm_gmem_populate() to use gmem attributes

>  #ifdef CONFIG_HAVE_KVM_ARCH_GMEM_POPULATE
> +static bool kvm_gmem_range_is_private(struct gmem_inode *gi, pgoff_t index,
> +				      size_t nr_pages, struct kvm *kvm, gfn_t gfn)
> +{
> +	pgoff_t end = index + nr_pages - 1;
> +	void *entry;
> +
> +	if (vm_memory_attributes)
> +		return kvm_range_has_vm_memory_attributes(kvm, gfn, gfn + nr_pages,
> +						       KVM_MEMORY_ATTRIBUTE_PRIVATE,
> +						       KVM_MEMORY_ATTRIBUTE_PRIVATE);
Can't compile kvm_range_has_vm_memory_attributes() if
CONFIG_KVM_VM_MEMORY_ATTRIBUTES is not set.