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[81.172.57.81]) by smtp.gmail.com with ESMTPSA id g82sm22104920wma.37.2020.07.06.08.23.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Jul 2020 08:23:00 -0700 (PDT) Subject: Re: [PATCH v6 09/10] iommu/mediatek: Modify MMU_CTRL register setting To: Chao Hao , Joerg Roedel , Rob Herring References: <20200703044127.27438-1-chao.hao@mediatek.com> <20200703044127.27438-10-chao.hao@mediatek.com> From: Matthias Brugger Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa OhLZuSKB1F5JcvLbETRjNzNU7B3TdS2+zkgQQdEyt7Ij2HXGLJ2w+yG2GuR9/iyCJRf10Okq gTh//XESJZ8S6KlOWbLXRE+yfkKDXQx2Jr1XuVvM3zPqH5FMg8reRVFsQ+vI0b+OlyekT/Xe 0Hwvqkev95GG6x7yseJwI+2ydDH6M5O7fPKFW5mzAdDE2g/K9B4e2tYK6/rA7Fq4cqiAw1+u EgO44+eFgv082xtBez5WNkGn18vtw0LW3ESmKh19u6kEGoi0WZwslCNaGFrS4M7OH+aOJeqK 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+abzEL6QDAAxn9md8KwrA3RtucNh87cHlDXfUBKa7SRvBjTczDg+HEPNk2u3hrz1j3l2rliQ y1UfYx7Vk/TrdwUIJgKS8QAr8Lw9WuvY2hSqL9vEjx8VAkPWNWPwrQ== Message-ID: <17fe4a7b-8732-7bad-6aaa-1a20a4921c7b@gmail.com> Date: Mon, 6 Jul 2020 17:22:59 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20200703044127.27438-10-chao.hao@mediatek.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200706_112302_465325_AC1DA600 X-CRM114-Status: GOOD ( 20.29 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, FY Yang , wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, TH Yang , linux-mediatek@lists.infradead.org, Yong Wu , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 03/07/2020 06:41, Chao Hao wrote: > The MMU_CTRL register of MT8173 is different from other SoCs. > The in_order_wr_en is bit[9] which is zero by default. > Other SoCs have the vitcim_tlb_en feature mapped to bit[12]. > This bit is set to one by default. We need to preserve the bit > when setting F_MMU_TF_PROT_TO_PROGRAM_ADDR as otherwise the > bit will be cleared and IOMMU performance will drop. > > Cc: Matthias Brugger > Cc: Yong Wu > Signed-off-by: Chao Hao Reviewed-by: Matthias Brugger > --- > drivers/iommu/mtk_iommu.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c > index e71003037ffa..a816030d00f1 100644 > --- a/drivers/iommu/mtk_iommu.c > +++ b/drivers/iommu/mtk_iommu.c > @@ -555,11 +555,13 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) > return ret; > } > > - if (data->plat_data->m4u_plat == M4U_MT8173) > + if (data->plat_data->m4u_plat == M4U_MT8173) { > regval = F_MMU_PREFETCH_RT_REPLACE_MOD | > F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173; > - else > - regval = F_MMU_TF_PROT_TO_PROGRAM_ADDR; > + } else { > + regval = readl_relaxed(data->base + REG_MMU_CTRL_REG); > + regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR; > + } > writel_relaxed(regval, data->base + REG_MMU_CTRL_REG); > > regval = F_L2_MULIT_HIT_EN | > _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek