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[76.14.218.44]) by smtp.gmail.com with ESMTPSA id r5sm5092591pjd.38.2021.04.14.09.17.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Apr 2021 09:17:48 -0700 (PDT) Date: Wed, 14 Apr 2021 09:17:38 -0700 From: Stephen Hemminger To: Greg KH Cc: Tianyu Lan , 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: <20210414091738.3df4bed5@hermes.local> In-Reply-To: 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-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Wed, 14 Apr 2021 17:45:51 +0200 Greg KH wrote: > 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 This is debatable, in isolation VM's shouldn't userspace take responsibility to validate host communication. If that is an issue please participate with the DPDK community (main user of this) to make sure netvsc userspace driver has the required checks.