linux-kernel - Re: [PATCH V13 10/10] arm/arm64: KVM: add guest SEA support

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Date:   Tue, 28 Mar 2017 12:19:43 +0800
From:   gengdongjiu <gengdongjiu@...wei.com>
To:     Christoffer Dall <cdall@...aro.org>,
        Tyler Baicar <tbaicar@...eaurora.org>
CC:     <christoffer.dall@...aro.org>, <marc.zyngier@....com>,
        <pbonzini@...hat.com>, <rkrcmar@...hat.com>,
        <linux@...linux.org.uk>, <catalin.marinas@....com>,
        <will.deacon@....com>, <rjw@...ysocki.net>, <lenb@...nel.org>,
        <matt@...eblueprint.co.uk>, <robert.moore@...el.com>,
        <lv.zheng@...el.com>, <nkaje@...eaurora.org>,
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        <tn@...ihalf.com>, <fu.wei@...aro.org>, <rostedt@...dmis.org>,
        <bristot@...hat.com>, <linux-arm-kernel@...ts.infradead.org>,
        <kvmarm@...ts.cs.columbia.edu>, <kvm@...r.kernel.org>,
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        <hanjun.guo@...aro.org>, <john.garry@...wei.com>,
        <shiju.jose@...wei.com>, <joe@...ches.com>
Subject: Re: [PATCH V13 10/10] arm/arm64: KVM: add guest SEA support

Hi Tyler,

I have a question for below code.

On 2017/3/25 0:01, Christoffer Dall wrote:
>  	is_iabt = kvm_vcpu_trap_is_iabt(vcpu);
> -	if (unlikely(!is_iabt && kvm_vcpu_dabt_isextabt(vcpu))) {
> +	if (unlikely(!is_iabt && kvm_vcpu_dabt_isextabt(vcpu)) && sea_status) {
>  		kvm_inject_vabt(vcpu);
when it is SEA synchronized abort, why here inject a asynchronous abort through kvm_inject_vabt(vcpu) instead of synchronized abort? seem the original kvm source code is also do that, so I am confused about that.
thanks .

>  		return 1;
>  	}