linux-kernel - Re: [PATCH 16/21] KVM: TDX: Premap initial guest memory

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Message-ID: <6d0198fc-02ba-4681-8332-b6c8424eec59@redhat.com>
Date: Tue, 10 Sep 2024 12:24:26 +0200
From: Paolo Bonzini <pbonzini@...hat.com>
To: Rick Edgecombe <rick.p.edgecombe@...el.com>, seanjc@...gle.com,
 kvm@...r.kernel.org
Cc: kai.huang@...el.com, dmatlack@...gle.com, isaku.yamahata@...il.com,
 yan.y.zhao@...el.com, nik.borisov@...e.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 16/21] KVM: TDX: Premap initial guest memory

On 9/4/24 05:07, Rick Edgecombe wrote:
> +static int tdx_mem_page_record_premap_cnt(struct kvm *kvm, gfn_t gfn,
> +					  enum pg_level level, kvm_pfn_t pfn)
> +{
> +	struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm);
> +
> +	/* Returning error here to let TDP MMU bail out early. */
> +	if (KVM_BUG_ON(level != PG_LEVEL_4K, kvm)) {
> +		tdx_unpin(kvm, pfn);
> +		return -EINVAL;
> +	}

Should this "if" already be part of patch 14, and in 
tdx_sept_set_private_spte() rather than tdx_mem_page_record_premap_cnt()?

Thanks,

Paolo