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 X-Spam-Level: X-Spam-Status: No, score=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5010C433E0 for ; Tue, 2 Mar 2021 12:17:35 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4A0F564F2C for ; Tue, 2 Mar 2021 12:17:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A0F564F2C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id F3A6443104; Tue, 2 Mar 2021 12:17:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BBXZ_uMKYDeW; Tue, 2 Mar 2021 12:17:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTP id E0607430A5; Tue, 2 Mar 2021 12:17:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id B9540C000A; Tue, 2 Mar 2021 12:17:33 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5BAB2C0001 for ; Tue, 2 Mar 2021 12:17:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 574C44EC94 for ; Tue, 2 Mar 2021 12:17:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id khwFWga_JijF for ; Tue, 2 Mar 2021 12:17:31 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp4.osuosl.org (Postfix) with ESMTP id 562E04EC65 for ; Tue, 2 Mar 2021 12:17:31 +0000 (UTC) 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 858D212FC; Tue, 2 Mar 2021 04:17:30 -0800 (PST) Received: from [10.57.48.219] (unknown [10.57.48.219]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 79C8C3F766; Tue, 2 Mar 2021 04:17:29 -0800 (PST) Subject: Re: [PATCH v3 1/3] iommu/arm-smmu: Add support for driver IOMMU fault handlers To: Jordan Crouse , linux-arm-msm@vger.kernel.org References: <20210225175135.91922-1-jcrouse@codeaurora.org> <20210225175135.91922-2-jcrouse@codeaurora.org> From: Robin Murphy Message-ID: <2d3c7595-0186-7231-96dc-ae52414480ee@arm.com> Date: Tue, 2 Mar 2021 12:17:24 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <20210225175135.91922-2-jcrouse@codeaurora.org> Content-Language: en-GB Cc: iommu@lists.linux-foundation.org, Will Deacon , linux-kernel@vger.kernel.org, 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" On 2021-02-25 17:51, Jordan Crouse wrote: > Call report_iommu_fault() to allow upper-level drivers to register their > own fault handlers. > > Signed-off-by: Jordan Crouse > --- > > drivers/iommu/arm/arm-smmu/arm-smmu.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c > index d8c6bfde6a61..0f3a9b5f3284 100644 > --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c > +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c > @@ -408,6 +408,7 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev) > struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); > struct arm_smmu_device *smmu = smmu_domain->smmu; > int idx = smmu_domain->cfg.cbndx; > + int ret; > > fsr = arm_smmu_cb_read(smmu, idx, ARM_SMMU_CB_FSR); > if (!(fsr & ARM_SMMU_FSR_FAULT)) > @@ -417,8 +418,12 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev) > iova = arm_smmu_cb_readq(smmu, idx, ARM_SMMU_CB_FAR); > cbfrsynra = arm_smmu_gr1_read(smmu, ARM_SMMU_GR1_CBFRSYNRA(idx)); > > - dev_err_ratelimited(smmu->dev, > - "Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n", > + ret = report_iommu_fault(domain, dev, iova, Beware that "dev" here is not a struct device, so this isn't right. I'm not entirely sure what we *should* be passing here, since we can't easily attribute a context fault to a specific client device, and passing the IOMMU device seems a bit dubious too, so maybe just NULL? Robin. > + fsynr & ARM_SMMU_FSYNR0_WNR ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ); > + > + if (ret == -ENOSYS) > + dev_err_ratelimited(smmu->dev, > + "Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n", > fsr, iova, fsynr, cbfrsynra, idx); > > arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_FSR, fsr); > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu