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spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:Cc:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=c11fhX1wj0UP9SeU+Rs77pPW9+GGnW7/ZMSZHiAb29U=; b=VOYkhGz+mcqh/1ppA4yFoYjYh zYO7qa8JoZs3Nv0D495TsQl2kz7IlXmm4cYyp+20aU27jH+Yp8c1TIiRiFp3gsVy/n6uAFGAJdWpO ce/zQzBza/3WDiHIjtFHdLFHG8OBjKjoMbh9pAVt1xl4ahsXWmzHYd67X6yIlYbjlCG8FI/rIKwlH zvIn9YdPnoCnjFAKK1jnkhhmWRn3aPEbc97pei30uj4MGmXqXbOoRcwTGlbt6Ic2lUIPZvdC2jUR7 Bm3WSi2jbYUU1gQ9XTCkc9vwtvVi3ayCmYTHftOy2hHglYB9REz3w6md/47H8mTKcXlup8iPD8ocg DIs6SVWsQ==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lRdO5-00713v-Ec; Wed, 31 Mar 2021 16:08:09 +0000 Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lRdO2-007134-04 for linux-arm-kernel@lists.infradead.org; Wed, 31 Mar 2021 16:08:07 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6D11FD6E; Wed, 31 Mar 2021 09:08:04 -0700 (PDT) Received: from [10.57.24.208] (unknown [10.57.24.208]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3FF463F792; Wed, 31 Mar 2021 09:08:02 -0700 (PDT) Subject: Re: [PATCH 16/18] iommu: remove DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE To: Christoph Hellwig , Joerg Roedel , Will Deacon , Li Yang Cc: freedreno@lists.freedesktop.org, kvm@vger.kernel.org, Michael Ellerman , linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, David Woodhouse , linux-arm-kernel@lists.infradead.org References: <20210316153825.135976-1-hch@lst.de> <20210316153825.135976-17-hch@lst.de> From: Robin Murphy Message-ID: <163376d7-ab23-a470-5bba-7fcd8ae95a4e@arm.com> Date: Wed, 31 Mar 2021 17:07:56 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: <20210316153825.135976-17-hch@lst.de> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210331_170806_242722_20564FEB X-CRM114-Status: GOOD ( 15.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2021-03-16 15:38, Christoph Hellwig wrote: [...] > diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > index f1e38526d5bd40..996dfdf9d375dd 100644 > --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > @@ -2017,7 +2017,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain, > .iommu_dev = smmu->dev, > }; > > - if (smmu_domain->non_strict) > + if (!iommu_get_dma_strict()) As Will raised, this also needs to be checking "domain->type == IOMMU_DOMAIN_DMA" to maintain equivalent behaviour to the attribute code below. > pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT; > > pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain); > @@ -2449,52 +2449,6 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev) > return group; > } > > -static int arm_smmu_domain_get_attr(struct iommu_domain *domain, > - enum iommu_attr attr, void *data) > -{ > - struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); > - > - switch (domain->type) { > - case IOMMU_DOMAIN_DMA: > - switch (attr) { > - case DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE: > - *(int *)data = smmu_domain->non_strict; > - return 0; > - default: > - return -ENODEV; > - } > - break; > - default: > - return -EINVAL; > - } > -} [...] > diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h > index f985817c967a25..edb1de479dd1a7 100644 > --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h > +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h > @@ -668,7 +668,6 @@ struct arm_smmu_domain { > struct mutex init_mutex; /* Protects smmu pointer */ > > struct io_pgtable_ops *pgtbl_ops; > - bool non_strict; > atomic_t nr_ats_masters; > > enum arm_smmu_domain_stage stage; > diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c > index 0aa6d667274970..3dde22b1f8ffb0 100644 > --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c > +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c > @@ -761,6 +761,9 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain, > .iommu_dev = smmu->dev, > }; > > + if (!iommu_get_dma_strict()) Ditto here. Sorry for not spotting that sooner :( Robin. > + pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT; > + > if (smmu->impl && smmu->impl->init_context) { > ret = smmu->impl->init_context(smmu_domain, &pgtbl_cfg, dev); > if (ret) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel