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SubjectRe: [PATCH v10 0/4] Add uacce module for Accelerator
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On 2020/1/10 上午1:49, Jonathan Cameron wrote:
> On Mon, 16 Dec 2019 11:08:13 +0800
> Zhangfei Gao <zhangfei.gao@linaro.org> 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

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