From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6635FC433EF for ; Wed, 11 May 2022 11:42:02 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 118A9828BA; Wed, 11 May 2022 11:42:02 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nRbHHFk_YEuU; Wed, 11 May 2022 11:41:59 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTPS id 7D1C8828AA; Wed, 11 May 2022 11:41:59 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5B163C0032; Wed, 11 May 2022 11:41:59 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1B788C002D for ; Wed, 11 May 2022 11:41:58 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id E7C876109C for ; Wed, 11 May 2022 11:41:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id W0uBrsJHssT1 for ; Wed, 11 May 2022 11:41:55 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by smtp3.osuosl.org (Postfix) with ESMTPS id DAB7661096 for ; Wed, 11 May 2022 11:41:54 +0000 (UTC) Received: from fraeml711-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KytDK07y5z67Wgc; Wed, 11 May 2022 19:37:05 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml711-chm.china.huawei.com (10.206.15.60) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 11 May 2022 13:41:51 +0200 Received: from [10.47.91.186] (10.47.91.186) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2375.24; Wed, 11 May 2022 12:41:49 +0100 Message-ID: Date: Wed, 11 May 2022 12:42:02 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.1 Subject: Re: [PATCH v7 1/7] iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity To: Yicong Yang , , , , , , , , , , , , , , , , , , , , , , , , References: <20220407125841.3678-1-yangyicong@hisilicon.com> <20220407125841.3678-2-yangyicong@hisilicon.com> In-Reply-To: <20220407125841.3678-2-yangyicong@hisilicon.com> X-Originating-IP: [10.47.91.186] X-ClientProxiedBy: lhreml705-chm.china.huawei.com (10.201.108.54) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Cc: zhangshaokun@hisilicon.com, liuqi115@huawei.com, linuxarm@huawei.com, prime.zeng@huawei.com 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: , From: John Garry via iommu Reply-To: John Garry Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 07/04/2022 13:58, Yicong Yang wrote: > The DMA operations of HiSilicon PTT device can only work properly with > identical mappings. So add a quirk for the device to force the domain I'm not sure if you meant to write "identity mappings". > as passthrough. > > Signed-off-by: Yicong Yang FWIW, Reviewed-by: John Garry > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > 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 627a3ed5ee8f..5ec15ae2a9b1 100644 > --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > @@ -2839,6 +2839,21 @@ static int arm_smmu_dev_disable_feature(struct device *dev, > } > } > > +#define IS_HISI_PTT_DEVICE(pdev) ((pdev)->vendor == PCI_VENDOR_ID_HUAWEI && \ > + (pdev)->device == 0xa12e) > + > +static int arm_smmu_def_domain_type(struct device *dev) > +{ > + if (dev_is_pci(dev)) { > + struct pci_dev *pdev = to_pci_dev(dev); > + > + if (IS_HISI_PTT_DEVICE(pdev)) > + return IOMMU_DOMAIN_IDENTITY; > + } > + > + return 0; > +} > + > static struct iommu_ops arm_smmu_ops = { > .capable = arm_smmu_capable, > .domain_alloc = arm_smmu_domain_alloc, > @@ -2856,6 +2871,7 @@ static struct iommu_ops arm_smmu_ops = { > .sva_unbind = arm_smmu_sva_unbind, > .sva_get_pasid = arm_smmu_sva_get_pasid, > .page_response = arm_smmu_page_response, > + .def_domain_type = arm_smmu_def_domain_type, > .pgsize_bitmap = -1UL, /* Restricted during device attach */ > .owner = THIS_MODULE, > .default_domain_ops = &(const struct iommu_domain_ops) { _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu