linux-kernel - Re: [PATCH] KVM: SVM: Analyze is_guest_mode() in svm_vcpu

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Message-ID: <CAB5KdOaV81ro=F8BiuFfR_OWrY1+AJ4QngSOXOZt7vH_bXPR5A@mail.gmail.com>
Date:   Tue, 22 Sep 2020 22:54:52 +0800
From:   Haiwei Li <lihaiwei.kernel@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Krish Sadhukhan <krish.sadhukhan@...cle.com>,
        Wanpeng Li <kernellwp@...il.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH] KVM: SVM: Analyze is_guest_mode() in svm_vcpu_run()

On 20/9/22 21:43, Paolo Bonzini wrote:
> On 14/09/20 22:43, Krish Sadhukhan wrote:
>>>
>>
>> Not related to your changes, but should we get rid of the variable
>> 'exit_fastpath' and just do,
>>
>>          return svm_exit_handler_fastpath(vcpu);
>>
>> It seems the variable isn't used anywhere else and svm_vcpu_run()
>> doesn't return from anywhere else either.
>
> Yes (also because vmx will do the same once we can push
> EXIT_FASTPATH_REENTER_GUEST handling up to vcpu_enter_guest)...

Hi, Paolo

I have sent a patch to do this,

https://lore.kernel.org/kvm/20200915113033.61817-1-lihaiwei.kernel@gmail.com/

Thanks.

     Haiwei