linux-kernel - Re: [PATCH v2 2/4] nSVM: introduce smv->nested.save to cache save area fields

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Message-ID: <46b08118-b5a2-ee9b-f0fa-49f830465243@redhat.com>
Date:   Tue, 28 Sep 2021 18:51:42 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Emanuele Giuseppe Esposito <eesposit@...hat.com>,
        kvm@...r.kernel.org
Cc:     Maxim Levitsky <mlevitsk@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] nSVM: introduce smv->nested.save to cache save
 area fields

On 17/09/21 14:03, Emanuele Giuseppe Esposito wrote:
> +static void copy_vmcb_save_area(struct vmcb_save_area_cached *dst,
> +				struct vmcb_save_area *from)
> +{
> +	/*
> +	 * Copy only necessary fields, as we need them

"Copy only fields that are validated" etc.

Paolo

> +	 * to avoid TOC/TOU races.
> +	 */