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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20200109174952.000051e1@Huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/1/10 上午1:49, Jonathan Cameron wrote: > On Mon, 16 Dec 2019 11:08:13 +0800 > Zhangfei Gao wrote: > >> Uacce (Unified/User-space-access-intended Accelerator Framework) targets to >> provide Shared Virtual Addressing (SVA) between accelerators and processes. >> So accelerator can access any data structure of the main cpu. >> This differs from the data sharing between cpu and io device, which share >> data content rather than address. >> Because of unified address, hardware and user space of process can share >> the same virtual address in the communication. >> >> Uacce is intended to be used with Jean Philippe Brucker's SVA >> patchset[1], which enables IO side page fault and PASID support. >> We have keep verifying with Jean's sva patchset [2] >> We also keep verifying with Eric's SMMUv3 Nested Stage patches [3] > Hi Zhangfei Gao, > > Just to check my understanding... > > This patch set is not dependent on either 2 or 3? > > To use it on our hardware, we need 2, but the interfaces used are already > upstream, so this could move forwards in parallel. > > Yes, patch 1, 2 is for uacce. patch 3, 4 is an example using uacce, which happen to be crypto. Thanks