linux-kernel - Re: [PATCH v2 10/13] KVM: x86: Shrink the usercopy region of the emulation context

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Message-ID: <727b8d16-2bab-6621-1f20-dc024ee65f10@redhat.com>
Date:   Mon, 2 Mar 2020 19:40:27 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 10/13] KVM: x86: Shrink the usercopy region of the
 emulation context

On 26/02/20 18:51, Vitaly Kuznetsov wrote:
>> +
>> +	/* Here begins the usercopy section. */
>> +	struct operand src;
>> +	struct operand src2;
>> +	struct operand dst;
> Out of pure curiosity, how certain are we that this is going to be
> enough for userspaces?
> 

And also, where exactly are the user copies done?

Paolo