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Date: Sat, 30 Mar 2024 21:31:40 +0100
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Subject: Re: [PATCH v12 11/29] KVM: SEV: Add KVM_SEV_SNP_LAUNCH_UPDATE command
To: Michael Roth <michael.roth@amd.com>, kvm@vger.kernel.org
Cc: linux-coco@lists.linux.dev, linux-mm@kvack.org,
 linux-crypto@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org,
 tglx@linutronix.de, mingo@redhat.com, jroedel@suse.de,
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 Brijesh Singh <brijesh.singh@amd.com>
References: <20240329225835.400662-1-michael.roth@amd.com>
 <20240329225835.400662-12-michael.roth@amd.com>
From: Paolo Bonzini <pbonzini@redhat.com>
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In-Reply-To: <20240329225835.400662-12-michael.roth@amd.com>
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On 3/29/24 23:58, Michael Roth wrote:
> +	memslot = gfn_to_memslot(kvm, params.gfn_start);
> +	if (!kvm_slot_can_be_private(memslot)) {
> +		ret = -EINVAL;
> +		goto out;
> +	}
> +

This can be moved to kvm_gmem_populate.

> +	populate_args.src = u64_to_user_ptr(params.uaddr);

This is not used if !do_memcpy, and in fact src is redundant with 
do_memcpy.  Overall the arguments can be "kvm, gfn, src, npages, 
post_populate, opaque" which are relatively few and do not need the struct.

I'll do that when posting the next version of the patches in kvm-coco-queue.

Paolo