From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3854FC433B4 for ; Wed, 14 Apr 2021 15:45:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AE79611EE for ; Wed, 14 Apr 2021 15:45:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350644AbhDNPqQ (ORCPT ); Wed, 14 Apr 2021 11:46:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:54068 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233199AbhDNPqP (ORCPT ); Wed, 14 Apr 2021 11:46:15 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6B73761164; Wed, 14 Apr 2021 15:45:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618415154; bh=hfUH+l4yceoC3AqTD4Kdw7lyf+fTM5LhOB+L96OLehc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=0tjSNZK6avIABrfXwQbVKug5rACXB5oWomA2ezly6jw95g6/7PUCtVF1oFXJ5wVHE FcBEykVjCai8T/rSms3YMehK5wMagFIRVK/CLORkifh3WpNOfF3hyOve3c38SON951 OhI8K1OOAlcNulMnOPPJBC9QO9eAi8eEwbOuV7Q8= Date: Wed, 14 Apr 2021 17:45:51 +0200 From: Greg KH To: Tianyu Lan Cc: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, akpm@linux-foundation.org, konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, Tianyu Lan , iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: Re: [Resend RFC PATCH V2 08/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM. Message-ID: References: <20210414144945.3460554-1-ltykernel@gmail.com> <20210414144945.3460554-9-ltykernel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210414144945.3460554-9-ltykernel@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org On Wed, Apr 14, 2021 at 10:49:41AM -0400, Tianyu Lan wrote: > From: Tianyu Lan > > UIO HV driver should not load in the isolation VM for security reason. > Return ENOTSUPP in the hv_uio_probe() in the isolation VM. > > Signed-off-by: Tianyu Lan > --- > drivers/uio/uio_hv_generic.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c > index 0330ba99730e..678b021d66f8 100644 > --- a/drivers/uio/uio_hv_generic.c > +++ b/drivers/uio/uio_hv_generic.c > @@ -29,6 +29,7 @@ > #include > #include > #include > +#include > > #include "../hv/hyperv_vmbus.h" > > @@ -241,6 +242,10 @@ hv_uio_probe(struct hv_device *dev, > void *ring_buffer; > int ret; > > + /* UIO driver should not be loaded in the isolation VM.*/ > + if (hv_is_isolation_supported()) > + return -ENOTSUPP; > + > /* Communicating with host has to be via shared memory not hypercall */ > if (!channel->offermsg.monitor_allocated) { > dev_err(&dev->device, "vmbus channel requires hypercall\n"); > -- > 2.25.1 > Again you send out known-wrong patches? :(