linux-kernel - Re: [PATCH] intel-iommu: Turn off translations at shutdown

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Message-ID: <CABeXuvoiX639HchLbgTHLiXPh=Yr2dJHUp2Yqc6pNJ3As1OJ8A@mail.gmail.com>
Date:   Fri, 8 Nov 2019 14:48:51 -0800
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     "Zeng, Jason" <jason.zeng@...el.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        "joro@...tes.org" <joro@...tes.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "Tian, Kevin" <kevin.tian@...el.com>
Subject: Re: [PATCH] intel-iommu: Turn off translations at shutdown

> > > For VMM live update case, we should be able to detect and bypass
> > > the shutdown that Deepa introduced here, so keep IOMMU still operating?
> >
> > Is that a 'yes' to Deepa's "if someone wants to make it conditional, we
> > can do that" ?
>
> Yes, I think so. Thanks!

Are these changes already part of the kernel like avoiding shutdown of
the passthrough devices? device_shutdown() doesn't seem to be doing
anything selectively as of now.

Thanks,
Deepa