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,USER_AGENT_GIT autolearn=unavailable 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 EABD2C43616 for ; Wed, 14 Apr 2021 14:51:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D169F6120E for ; Wed, 14 Apr 2021 14:51:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352130AbhDNOv2 (ORCPT ); Wed, 14 Apr 2021 10:51:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351969AbhDNOux (ORCPT ); Wed, 14 Apr 2021 10:50:53 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D4D1C061756; Wed, 14 Apr 2021 07:50:32 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id f29so14577103pgm.8; Wed, 14 Apr 2021 07:50:32 -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=E+2cIG4luSiauZCXt8F0KkKTk61dfk7whIIE/VHBZpNK6ARjyQdSQbpdQClQ4sSrp/ dGr6hJu/fS4Ac4GvGFZRUctlN3UoGYzjwv/J4NIfKYbBrLXDX0DII3Kqd0z13GyzT7N9 3K8eWfVsyRnUmawlgrvkAxuuTExFaWpsJRH42W4ZrmtKgAL9Ko81HY7WIxnfJaEZ8aiH Re9gsUe5b3chBVWCDNntU9qAIDzO3tUL22enF3c2ium4ZddwWgTLyh5yVJnZkUplcHhN 5Di+lzE1Zg2G82MYEnz9s+UIXemJpVVS+BIdIcbJOLkBiyzwWmhzx/daa53C594lB6Z4 MjZA== 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=aDPftXD0vZ+cp0ekM59SlWDwFIKr348YQdK0x7vNhL7sfG9ZdWzWqLRz0Brktf47mJ Bly5vE8eVVMhJO8uBxSvHMDHMfF5gdA4sP5OXh80fLDPcLVMK37Tgi4FOwlE1JUCgW7W 7/BCzuexFCZH25V6k+9B9l94LThQ4se/SX7PjRo0k4CVcGmxyniDCQqny87Gig3T2uVd IxBPGtIB9+Gut0Y9phvxFBpQ3VIOx/quuvyxUOiP+GnmWbXe2SbFphnq+PG/ASsUlMqw WagdgNM1JW6n/ch7Pw2lubs388W3wHUetPYY7gZiUO0IG1N3wT7tlVgx8+mPRCCGQ4AZ 1u1w== X-Gm-Message-State: AOAM533s0XiZ93jVavkCA5rkn8tONKfik7MoLMZaT77DVytldPZ/vh85 r/e7Tzun/rBPp0qn7eg7SHk= X-Google-Smtp-Source: ABdhPJyJQo3QYxkwZd2R/2jbCS/20DZeDnEWp76po+53FmLx6JhMmfhewCcVF2Q2CCy9ma7VhRrp6w== X-Received: by 2002:a63:4e47:: with SMTP id o7mr37301695pgl.286.1618411832013; Wed, 14 Apr 2021 07:50:32 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:35:ebad:12c1:f579:e332]) by smtp.gmail.com with ESMTPSA id w67sm17732522pgb.87.2021.04.14.07.50.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Apr 2021 07:50:31 -0700 (PDT) From: Tianyu Lan To: 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, gregkh@linuxfoundation.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 Cc: 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: [Resend RFC PATCH V2 08/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM. Date: Wed, 14 Apr 2021 10:49:41 -0400 Message-Id: <20210414144945.3460554-9-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210414144945.3460554-1-ltykernel@gmail.com> References: <20210414144945.3460554-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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