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Thu, 07 May 2020 14:14:02 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 97F91C43637; Thu, 7 May 2020 14:14:02 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: sibis) by smtp.codeaurora.org (Postfix) with ESMTPSA id DC865C433F2; Thu, 7 May 2020 14:14:01 +0000 (UTC) MIME-Version: 1.0 Date: Thu, 07 May 2020 19:44:01 +0530 From: Sibi Sankar To: Will Deacon Subject: Re: [PATCHv4 4/6] iommu/arm-smmu-qcom: Request direct mapping for modem device In-Reply-To: <20200507130210.GB31783@willie-the-truck> References: <8ef5d93c74f5cd9e4a6edab86d1d46efbf3aa038.1587407458.git.saiprakash.ranjan@codeaurora.org> <20200507130210.GB31783@willie-the-truck> Message-ID: X-Sender: sibis@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Cc: linux-kernel-owner@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Bjorn Andersson , Matthias Kaehlcke , Evan Green , linux-arm-msm@vger.kernel.org, Stephen Boyd , Robin Murphy , linux-arm-kernel@lists.infradead.org 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hey WIll, On 2020-05-07 18:32, Will Deacon wrote: > On Tue, Apr 21, 2020 at 12:03:52AM +0530, Sai Prakash Ranjan wrote: >> From: Sibi Sankar >> >> The Q6 modem sub-system has direct access to DDR through memnoc. >> Also SMMU is not expected to provide access control/translation >> for these SIDs (sandboxing of the modem is achieved through XPUs >> engaged using SMC calls). So request direct mapping for modem on >> platforms which don't have TrustZone. > > The Z7 space rocket framework has limited access to water through > BROADCHAN. > Also, this commit message really sucks. So please can you rewrite it in > a > way that makes sense to people outside of your office? lol, sure I'll re-word ^^ tday > > Will -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu