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([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 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: DE92940002C4 X-Stat-Signature: to59aywkb1kkn3zf6qf9963d3kz61g7f Received-SPF: none (gmail.com>: No applicable sender policy available) receiver=imf02; identity=mailfrom; envelope-from=""; helo=mail-pg1-f176.google.com; client-ip=209.85.215.176 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618474779-513892 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000066, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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.