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[124.171.83.152]) by smtp.gmail.com with ESMTPSA id 66sm15775112pfd.93.2020.07.14.00.12.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jul 2020 00:12:48 -0700 (PDT) Subject: Re: [PATCH 4/5] dma-mapping: add a dma_ops_bypass flag to struct device To: Christoph Hellwig References: <20200708152449.316476-1-hch@lst.de> <20200708152449.316476-5-hch@lst.de> <9bff7460-e6fa-f765-dcb4-cc96eb86d92c@ozlabs.ru> <20200714070757.GA776@lst.de> From: Alexey Kardashevskiy Autocrypt: addr=aik@ozlabs.ru; keydata= mQINBE+rT0sBEADFEI2UtPRsLLvnRf+tI9nA8T91+jDK3NLkqV+2DKHkTGPP5qzDZpRSH6mD EePO1JqpVuIow/wGud9xaPA5uvuVgRS1q7RU8otD+7VLDFzPRiRE4Jfr2CW89Ox6BF+q5ZPV /pS4v4G9eOrw1v09lEKHB9WtiBVhhxKK1LnUjPEH3ifkOkgW7jFfoYgTdtB3XaXVgYnNPDFo PTBYsJy+wr89XfyHr2Ev7BB3Xaf7qICXdBF8MEVY8t/UFsesg4wFWOuzCfqxFmKEaPDZlTuR tfLAeVpslNfWCi5ybPlowLx6KJqOsI9R2a9o4qRXWGP7IwiMRAC3iiPyk9cknt8ee6EUIxI6 t847eFaVKI/6WcxhszI0R6Cj+N4y+1rHfkGWYWupCiHwj9DjILW9iEAncVgQmkNPpUsZECLT 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XrB5p+6ML7Bd84xOEGsj/vdaXmz1esuH7BOZAGEZfLRCHJ0GVCSssg== Message-ID: <4883e908-2e8d-6c13-6e28-154aa8ab3a78@ozlabs.ru> Date: Tue, 14 Jul 2020 17:12:42 +1000 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: <20200714070757.GA776@lst.de> Content-Language: en-US Cc: Daniel Borkmann , Greg Kroah-Hartman , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jesper Dangaard Brouer , Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 14/07/2020 17:07, Christoph Hellwig wrote: > On Mon, Jul 13, 2020 at 02:59:39PM +1000, Alexey Kardashevskiy wrote: >> >> >> On 09/07/2020 01:24, Christoph Hellwig wrote: >>> Several IOMMU drivers have a bypass mode where they can use a direct >>> mapping if the devices DMA mask is large enough. Add generic support >>> to the core dma-mapping code to do that to switch those drivers to >>> a common solution. >>> >>> Signed-off-by: Christoph Hellwig >>> --- >>> include/linux/device.h | 8 +++++ >>> kernel/dma/Kconfig | 8 +++++ >>> kernel/dma/mapping.c | 74 +++++++++++++++++++++++++++++------------- >>> 3 files changed, 68 insertions(+), 22 deletions(-) >>> >>> diff --git a/include/linux/device.h b/include/linux/device.h >>> index 4c4af98321ebd6..1f71acf37f78d7 100644 >>> --- a/include/linux/device.h >>> +++ b/include/linux/device.h >>> @@ -523,6 +523,11 @@ struct dev_links_info { >>> * sync_state() callback. >>> * @dma_coherent: this particular device is dma coherent, even if the >>> * architecture supports non-coherent devices. >>> + * @dma_ops_bypass: If set to %true then the dma_ops are bypassed for the >>> + * streaming DMA operations (->map_* / ->unmap_* / ->sync_*), >>> + * and optionall (if the coherent mask is large enough) also >> >> >> s/optionall/optional/g >> >> Otherwise the series looks good and works well on powernv and pseries. >> Thanks, > > Can you give a formal ACK? It did never matter before but sure :) Tested-by: Alexey Kardashevskiy Reviewed-by: Alexey Kardashevskiy or you want me to reply to individual patches? Thanks, -- Alexey _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu