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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 02307C433ED for ; Wed, 14 Apr 2021 15:41:45 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A712261164 for ; Wed, 14 Apr 2021 15:41:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A712261164 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 382556B007D; Wed, 14 Apr 2021 11:41:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3590B6B007E; Wed, 14 Apr 2021 11:41:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 221386B0080; Wed, 14 Apr 2021 11:41:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0060.hostedemail.com [216.40.44.60]) by kanga.kvack.org (Postfix) with ESMTP id 0696F6B007D for ; Wed, 14 Apr 2021 11:41:44 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id B3AA5181EC4A7 for ; Wed, 14 Apr 2021 15:41:43 +0000 (UTC) X-FDA: 78031387686.22.48C2B66 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf28.hostedemail.com (Postfix) with ESMTP id 929F22000268 for ; Wed, 14 Apr 2021 15:41:44 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 4840368C7B; Wed, 14 Apr 2021 17:41:41 +0200 (CEST) Date: Wed, 14 Apr 2021 17:41:41 +0200 From: Christoph Hellwig 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, 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, 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 04/12] HV: Add Write/Read MSR registers via ghcb Message-ID: <20210414154141.GB32045@lst.de> References: <20210414144945.3460554-1-ltykernel@gmail.com> <20210414144945.3460554-5-ltykernel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210414144945.3460554-5-ltykernel@gmail.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 929F22000268 X-Stat-Signature: ccpjpct1gcicu4itd7ze1f6e856ek99h Received-SPF: none (lst.de>: No applicable sender policy available) receiver=imf28; identity=mailfrom; envelope-from=""; helo=verein.lst.de; client-ip=213.95.11.211 X-HE-DKIM-Result: none/none X-HE-Tag: 1618414904-242567 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > +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?