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=-4.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 9C76EC43603 for ; Thu, 15 Apr 2021 08:19:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7927161249 for ; Thu, 15 Apr 2021 08:19:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231660AbhDOIUU (ORCPT ); Thu, 15 Apr 2021 04:20:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231215AbhDOIUS (ORCPT ); Thu, 15 Apr 2021 04:20:18 -0400 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 272F5C061574; Thu, 15 Apr 2021 01:19:56 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id g16so2268651pfq.5; Thu, 15 Apr 2021 01:19:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=55qzNVVtKjr2EGfMAcgdM/oHJ/MI5Oe+cwdS/Ji0ZVI=; b=j1tVlhHWeqCzmIWXEopfN2gvVhO87Jr/RyNB0t/arTH8+bg7DKBr+fI040TTp9S9dB /NzzFMy3hbY/ewwcaITstDzoy52Wgs4wGuQ5U5o4uPJowRFrrEnSMnP8N2Qb3i5zZjXQ sCqSMpYbitygg49aIHDhasd3Pi72eqGwhTPoAnW1qgSzqZW7XWXrv/4JCx9LSDXMvhzf znL5/rmGU9y1+OFti8QmL1ryMuD9so/V9sqtlzAaVReyqpoDpbqtdZOG7VIAMj0ZL4w4 Kv0HXVb9dekpbqJdlNhLG+oY2Owt4l/wcViRbNFuH7o1uikboz9/tlwvLhkf0FLxKmmz xTZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=55qzNVVtKjr2EGfMAcgdM/oHJ/MI5Oe+cwdS/Ji0ZVI=; b=JGoz6Crs1qH1AMfpCkqkeQx9IylV5HCIC98ReJTHTGltQGyFP5Y1gGyJVhbjubCG3n wCbX29hjzJ/lRZ/7EgmXo77JFmr8DQC34JfmxNPUoKpvIs/6LPf6zGwYSSzOw0/v3P1Z 8EbcPgcEIZNJHCGnHlGU2SE5LgJ3zdWNbhY2sFPK4WK0MMQkMw7npwH96UUltcIm3NXo k8Wwo0t9T5lAT6w56VgU8S339iO5pOgCBndcfJEvhPeoG5aycyuReXp7TxZudPBliuL5 DsIA3n1u23riz1tBje3sP2wSgSp86dKG4yjZLUtniFi+5xy2Zueh6rDpcXMaxiAIqy82 /sfw== X-Gm-Message-State: AOAM532hy3Pztf/EZCK9am1Mdz5y8WJNLiX0wI0xYmolz8gYTC/PRF6V SFX+sd8qh7zejvuctXTJT9AfqeWyOsh60dyQ X-Google-Smtp-Source: ABdhPJwWGtaQnufAXInm7v66wKabfVJG17NJUFp65axa03YX5DYY821+MSztj4RCKZDgwDB8o2T9wQ== X-Received: by 2002:a63:470f:: with SMTP id u15mr2378163pga.199.1618474795726; Thu, 15 Apr 2021 01:19:55 -0700 (PDT) Received: from ?IPv6:2404:f801:0:6:8000::a31c? ([2404:f801:9000:1a:efeb::a31c]) by smtp.gmail.com with ESMTPSA id h21sm1732615pgi.60.2021.04.15.01.19.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 Apr 2021 01:19:55 -0700 (PDT) Subject: Re: [Resend RFC PATCH V2 04/12] HV: Add Write/Read MSR registers via ghcb To: Christoph Hellwig 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, gregkh@linuxfoundation.org, konrad.wilk@oracle.com, 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 References: <20210414144945.3460554-1-ltykernel@gmail.com> <20210414144945.3460554-5-ltykernel@gmail.com> <20210414154141.GB32045@lst.de> From: Tianyu Lan Message-ID: Date: Thu, 15 Apr 2021 16:19:45 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.9.1 MIME-Version: 1.0 In-Reply-To: <20210414154141.GB32045@lst.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/14/2021 11:41 PM, Christoph Hellwig wrote: >> +EXPORT_SYMBOL_GPL(hv_ghcb_msr_write); > > Just curious, who is going to use all these exports? These seems like > extremely low-level functionality. Isn't there a way to build a more > useful higher level API? > Yes, will remove it.