linux-kernel - Re: [PATCH v3 1/8] KVM: X86: Reset vcpu->arch.cpuid_nent to 0 if SET

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Date:   Wed, 8 Jul 2020 14:00:50 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Xiaoyao Li <xiaoyao.li@...el.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Jim Mattson <jmattson@...gle.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH v3 1/8] KVM: X86: Reset vcpu->arch.cpuid_nent to 0 if
 SET_CPUID* fails

On 08/07/20 08:50, Xiaoyao Li wrote:
> +Note, when this IOCTL fails, KVM gives no guarantees that previous valid CPUID
> +configuration (if there is) is not corrupted. Userspace can get a copy of valid
> +CPUID configuration through KVM_GET_CPUID2 in case.
> +
>  ::

I assume you mean "of the resulting CPUID configuration".

Paolo