Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and SMI

From	Paolo Bonzini <pbonzini@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and SMI
Date	2016-06-06 10:20 +0200
Message-ID	<rGXVo-2jv-17@gated-at.bofh.it> (permalink)
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On 05/06/2016 05:28, Wanpeng Li wrote:
>> > No, I don't think so, the existing req_immediate_exit case is only after
>> > a VMLAUNCH/VMRESUME vmexit, in which case we already have a
>> >
>> >         if (vmx->nested.nested_run_pending)
>> >                 kvm_make_request(KVM_REQ_EVENT, vcpu);
>> >
>> > in vmx_vcpu_run.
> Do you think this can be removed since it blindly request a
> KVM_REQ_EVENT even if there is no still-pending event to L1 which
> blocked by nested_run_pending, however, req_immediate_exit can
> indicate there is a pending event blocked by nested_run_pending and
> the request KVM_REQUEST_EVENT added in your patch can guarantee inject
> this pending event in the next nested vmexit.

Yes, I think so.

Thanks,

Paolo

Thread

[PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and SMI Paolo Bonzini <pbonzini@redhat.com> - 2016-06-01 14:40 +0200
  Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ  and SMI Radim Krčmář <rkrcmar@redhat.com> - 2016-06-01 18:50 +0200
    Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and  SMI Paolo Bonzini <pbonzini@redhat.com> - 2016-06-01 20:10 +0200
      Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and SMI Wanpeng Li <kernellwp@gmail.com> - 2016-06-05 05:30 +0200
        Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and  SMI Paolo Bonzini <pbonzini@redhat.com> - 2016-06-06 10:20 +0200
          Re: [PATCH 1/2] KVM: x86: avoid simultaneous queueing of both IRQ and SMI Wanpeng Li <kernellwp@gmail.com> - 2016-06-06 10:30 +0200

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