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([240e:362:4bf:e00:57d:5da4:e49:50d]) by smtp.gmail.com with ESMTPSA id k25sm16744621pfi.10.2021.01.10.19.29.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 10 Jan 2021 19:29:37 -0800 (PST) Subject: Re: [PATCH v9 05/10] uacce: Enable IOMMU_DEV_FEAT_IOPF To: Jean-Philippe Brucker , joro@8bytes.org, will@kernel.org Cc: lorenzo.pieralisi@arm.com, robh+dt@kernel.org, guohanjun@huawei.com, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, robin.murphy@arm.com, Jonathan.Cameron@huawei.com, eric.auger@redhat.com, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-accelerators@lists.ozlabs.org, baolu.lu@linux.intel.com, vdumpa@nvidia.com, shameerali.kolothum.thodi@huawei.com, vivek.gautam@arm.com, Arnd Bergmann , Greg Kroah-Hartman , Zhou Wang References: <20210108145217.2254447-1-jean-philippe@linaro.org> <20210108145217.2254447-6-jean-philippe@linaro.org> From: Zhangfei Gao Message-ID: <2cef454d-d872-d306-ceca-c7ae1dbfea1e@linaro.org> Date: Mon, 11 Jan 2021 11:29:05 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210108145217.2254447-6-jean-philippe@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 2021/1/8 下午10:52, Jean-Philippe Brucker wrote: > The IOPF (I/O Page Fault) feature is now enabled independently from the > SVA feature, because some IOPF implementations are device-specific and > do not require IOMMU support for PCIe PRI or Arm SMMU stall. > > Enable IOPF unconditionally when enabling SVA for now. In the future, if > a device driver implementing a uacce interface doesn't need IOPF > support, it will need to tell the uacce module, for example with a new > flag. > > Signed-off-by: Jean-Philippe Brucker > --- > Cc: Arnd Bergmann > Cc: Greg Kroah-Hartman > Cc: Zhangfei Gao > Cc: Zhou Wang Thanks Jean Acked-by: Zhangfei Gao