linux-kernel - Re: [PATCH 3/4] KVM: x86: inject nested page faults on emulated instructions

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Message-ID: <54089EA5.5080407@redhat.com>
Date:	Thu, 04 Sep 2014 19:17:25 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Gleb Natapov <gleb@...nel.org>
CC:	Gleb Natapov <gleb@...udius-systems.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org, jroedel@...e.de,
	agraf@...e.de, valentine.sinitsyn@...il.com,
	jan.kiszka@...mens.com, avi@...udius-systems.com
Subject: Re: [PATCH 3/4] KVM: x86: inject nested page faults on emulated instructions

Il 04/09/2014 17:05, Gleb Natapov ha scritto:
>> >         if (ctxt->have_exception) {
>> >                 inject_emulated_exception(vcpu);
>> > -               r = EMULATE_DONE;
>> > +               return EMULATE_DONE;
> If there was no vmexit we still want to writeback. Perhaps:
>     writeback = inject_emulated_exception(vcpu);
> and return false if there was vmexit due to nested page fault (or any fault,
> can't L1 ask for #GP/#UD intercept that need to be handled here too?)
> 

Sounds good.

Paolo
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