netdev - RE: [PATCH v2 4/4] hv_netvsc: Restrict configurations on isolated guests

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Date:   Tue, 26 Jan 2021 15:36:09 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     "Andrea Parri (Microsoft)" <parri.andrea@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        Michael Kelley <mikelley@...rosoft.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        Saruhan Karademir <skarade@...rosoft.com>,
        Juan Vazquez <juvazq@...rosoft.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH v2 4/4] hv_netvsc: Restrict configurations on isolated
 guests



> -----Original Message-----
> From: Andrea Parri (Microsoft) <parri.andrea@...il.com>
> Sent: Tuesday, January 26, 2021 6:57 AM
> To: linux-kernel@...r.kernel.org
> Cc: KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; Wei Liu <wei.liu@...nel.org>; Michael Kelley
> <mikelley@...rosoft.com>; linux-hyperv@...r.kernel.org; Tianyu Lan
> <Tianyu.Lan@...rosoft.com>; Saruhan Karademir
> <skarade@...rosoft.com>; Juan Vazquez <juvazq@...rosoft.com>; Andrea
> Parri (Microsoft) <parri.andrea@...il.com>; Jakub Kicinski
> <kuba@...nel.org>; David S. Miller <davem@...emloft.net>;
> netdev@...r.kernel.org
> Subject: [PATCH v2 4/4] hv_netvsc: Restrict configurations on isolated guests
> 
> Restrict the NVSP protocol version(s) that will be negotiated with the host to
> be NVSP_PROTOCOL_VERSION_61 or greater if the guest is running isolated.
> Moreover, do not advertise the SR-IOV capability and ignore
> NVSP_MSG_4_TYPE_SEND_VF_ASSOCIATION messages in isolated guests,
> which are not supposed to support SR-IOV.  This reduces the footprint of the
> code that will be exercised by Confidential VMs and hence the exposure to
> bugs and vulnerabilities.
> 
> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@...il.com>
> Acked-by: Jakub Kicinski <kuba@...nel.org>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: netdev@...r.kernel.org

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
Thanks.