linux-kernel - Re: [PATCH] KVM: x86: Exit to userspace when kvm_check_nested

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Message-ID: <73c45041-6bb3-801c-bd80-f48b2e525548@redhat.com>
Date:   Wed, 28 Jul 2021 17:55:29 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     Jim Mattson <jmattson@...gle.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH] KVM: x86: Exit to userspace when kvm_check_nested_events
 fails

On 28/07/21 14:39, Vitaly Kuznetsov wrote:
> Shouldn't we also change kvm_arch_vcpu_runnable() and check
> 'kvm_vcpu_running() > 0' now?

I think leaving kvm_vcpu_block on error is the better choice, so it 
should be good with returning true if kvm_vcpu_running(vcpu) < 0.

Paolo