linux-kernel - Re: [PATCH V2 06/12] virtio_pci: harden MSI-X interrupts

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Message-ID: <CACGkMEtZB7y=OVcCvLWkdOyPrifAKJOU_tHLSyfMNGMkPspp4g@mail.gmail.com>
Date:   Thu, 14 Oct 2021 10:29:49 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     virtualization <virtualization@...ts.linux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "Hetzelt, Felicitas" <f.hetzelt@...berlin.de>,
        "kaplan, david" <david.kaplan@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: Re: [PATCH V2 06/12] virtio_pci: harden MSI-X interrupts

On Wed, Oct 13, 2021 at 5:59 PM Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Tue, Oct 12, 2021 at 02:52:21PM +0800, Jason Wang wrote:
> > We used to synchronize pending MSI-X irq handlers via
> > synchronize_irq(), this may not work for the untrusted device which
> > may keep sending interrupts after reset which may lead unexpected
> > results. Similarly, we should not enable MSI-X interrupt until the
> > device is ready.
>
> You mean until the driver is ready.

RIght, I will fix it.

Thanks