linux-kernel - Re: [RFC V2 PATCH 8/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM.

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Message-ID: <YHXAL+83iHPK8O/Q@kroah.com>
Date:   Tue, 13 Apr 2021 18:00:47 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Tianyu Lan <ltykernel@...il.com>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        vkuznets@...hat.com, thomas.lendacky@....com,
        brijesh.singh@....com, sunilmut@...rosoft.com
Subject: Re: [RFC V2 PATCH 8/12] UIO/Hyper-V: Not load UIO HV driver in the
 isolation VM.

On Tue, Apr 13, 2021 at 11:22:13AM -0400, Tianyu Lan wrote:
> From: Tianyu Lan <Tianyu.Lan@...rosoft.com>
> 
> UIO HV driver should not load in the isolation VM for security reason.

Why?  I need a lot more excuse than that.

Why would the vm allow UIO devices to bind to it if it was not possible?
Shouldn't the VM be handling this type of logic and not forcing all
individual hyperv drivers to do this?

This feels wrong...

thanks,

greg k-h