linux-kernel - Re: [PATCH v6 04/12] KVM: SVM: Modify intercept

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Message-ID: <20200914150627.GB6855@sjchrist-ice>
Date:   Mon, 14 Sep 2020 08:06:27 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Babu Moger <babu.moger@....com>, vkuznets@...hat.com,
        jmattson@...gle.com, wanpengli@...cent.com, kvm@...r.kernel.org,
        joro@...tes.org, x86@...nel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, tglx@...utronix.de
Subject: Re: [PATCH v6 04/12] KVM: SVM: Modify intercept_exceptions to
 generic intercepts

On Sat, Sep 12, 2020 at 06:52:20PM +0200, Paolo Bonzini wrote:
> On 11/09/20 21:28, Babu Moger wrote:
> > diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> > index 1a5f3908b388..11892e86cb39 100644
> > --- a/arch/x86/kvm/svm/svm.c
> > +++ b/arch/x86/kvm/svm/svm.c
> > @@ -1003,11 +1003,11 @@ static void init_vmcb(struct vcpu_svm *svm)
> >  
> >  	set_dr_intercepts(svm);
> >  
> > -	set_exception_intercept(svm, PF_VECTOR);
> > -	set_exception_intercept(svm, UD_VECTOR);
> > -	set_exception_intercept(svm, MC_VECTOR);
> > -	set_exception_intercept(svm, AC_VECTOR);
> > -	set_exception_intercept(svm, DB_VECTOR);
> > +	set_exception_intercept(svm, INTERCEPT_PF_VECTOR);
> > +	set_exception_intercept(svm, INTERCEPT_UD_VECTOR);
> > +	set_exception_intercept(svm, INTERCEPT_MC_VECTOR);
> > +	set_exception_intercept(svm, INTERCEPT_AC_VECTOR);
> > +	set_exception_intercept(svm, INTERCEPT_DB_VECTOR);
> 
> I think these should take a vector instead, and add 64 in the functions.

And "s/int bit/u32 vector" + BUILD_BUG_ON(vector > 32)?