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([2404:f801:9000:1a:efea::4b1]) by smtp.gmail.com with ESMTPSA id y7sm4139094pfp.102.2021.08.12.08.38.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Aug 2021 08:38:42 -0700 (PDT) Subject: Re: [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function To: Christoph Hellwig Cc: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, sfr@canb.auug.org.au, saravanand@fb.com, krish.sadhukhan@oracle.com, aneesh.kumar@linux.ibm.com, xen-devel@lists.xenproject.org, rientjes@google.com, hannes@cmpxchg.org, tj@kernel.org, michael.h.kelley@microsoft.com, iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, parri.andrea@gmail.com, dave.hansen@intel.com References: <20210809175620.720923-1-ltykernel@gmail.com> <20210809175620.720923-10-ltykernel@gmail.com> <20210812122657.GB19050@lst.de> From: Tianyu Lan Message-ID: <0598906d-9a47-34a9-16bf-4bacff7fa058@gmail.com> Date: Thu, 12 Aug 2021 23:38:27 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20210812122657.GB19050@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: netdev@vger.kernel.org On 8/12/2021 8:26 PM, Christoph Hellwig wrote: > On Mon, Aug 09, 2021 at 01:56:13PM -0400, Tianyu Lan wrote: >> From: Tianyu Lan >> >> In Hyper-V Isolation VM with AMD SEV, swiotlb boucne buffer >> needs to be mapped into address space above vTOM and so >> introduce dma_map_decrypted/dma_unmap_encrypted() to map/unmap >> bounce buffer memory. The platform can populate man/unmap callback >> in the dma memory decrypted ops. > > Nothing here looks actually DMA related, and the names are horribly > confusing vs the actual dma_map_* calls. > OK. So this still need to keep in the set_memory.c file.