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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 331E6C433B4 for ; Tue, 13 Apr 2021 15:22:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16B2C611CE for ; Tue, 13 Apr 2021 15:22:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346648AbhDMPXD (ORCPT ); Tue, 13 Apr 2021 11:23:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346622AbhDMPXB (ORCPT ); Tue, 13 Apr 2021 11:23:01 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CCD44C06175F; Tue, 13 Apr 2021 08:22:40 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id m18so6192333plc.13; Tue, 13 Apr 2021 08:22:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=bVkRTqUPBzQHoWP1iz19JnEvLpWiwpbLKKeUDMKlliw=; b=BxTMUp2Tm3RQTq4YSIMuJR/D6780D5gZyzHemutlmtyueknTeg1We2imlEqzQX+FnK 01feR2OKBOA6cd9A6CKKn72znoP4HtNQnBzNlu3efI7Pis0eEEVHaZ8LMotJiK/1WHjb d6IoPQGblP1eQwP5+Rdfmu5/MapIl6Q0uv88et+TE1RdYahpCBTvfUlT+J1fHsZFXKEo Zc64Y2lqsNqdOlqFP+FomzSli7veeMR7LAklgVpkSZNGdzXBKBHEilCwgTluQECPfFcX B/n5QpDbRgnpDEHUn6toU+5VOMRKE9rh0uQgiF4Aaa77+2nxWav4DdYplVVlMgp9Qt8z inAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bVkRTqUPBzQHoWP1iz19JnEvLpWiwpbLKKeUDMKlliw=; b=piNjAoIt4D6TMqDeUH+E5hPSMoI1Zya7wvfWFwyivZRyfTkrNGuXubtJ0zeOoqqaOJ cGSPiVq0ZlrqHhoJ3jFY+SYN+nnBHh5wQOMINoKbfaaiY+/5V6HO0eHxtIWH3D5NoLUH 2V8CpkUiMYKsAig8Aa6lWnylvQHk7a0weDDMtuqZ34Roq6CUAfabgpY7xRo8uqn95w/B wUS6nXwPnd0L7uZeXsbUS4ozJt0A9LE7q86OYs6bcLPsyCyN2os2FQbbSeupye2X6XKH v32BvQhHA0VtMY1CBgz1fT6fFBdoXwWQKYFgi8g2LiFBpF89XAUUITMHZPpUYnmvVgMU sbIw== X-Gm-Message-State: AOAM532TV2fynsySjeYhv0hC06qab39iK1vSF9w6T9CzbmlhDJHJHSdm w4tUKMQsW+MP4Iz6ioiFuIiD1/q1JIU7J3rq X-Google-Smtp-Source: ABdhPJzpfpV7JLPNYjuLc6pXxs2sJiQ3wltDlDvLgyVk7Yfs2esa7665OnanlRLzGjue8Lbv00JqPQ== X-Received: by 2002:a17:90a:7e03:: with SMTP id i3mr556228pjl.234.1618327360484; Tue, 13 Apr 2021 08:22:40 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:36:5b29:fe1a:45c9:c61c]) by smtp.gmail.com with ESMTPSA id y3sm12882026pfg.145.2021.04.13.08.22.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Apr 2021 08:22:40 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, gregkh@linuxfoundation.org Cc: Tianyu Lan , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, vkuznets@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: [RFC V2 PATCH 8/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM. Date: Tue, 13 Apr 2021 11:22:13 -0400 Message-Id: <20210413152217.3386288-9-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210413152217.3386288-1-ltykernel@gmail.com> References: <20210413152217.3386288-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org 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