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=-8.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 B1159C2D0BF for ; Tue, 17 Dec 2019 17:24:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8903324676 for ; Tue, 17 Dec 2019 17:24:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WzgiU9HD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726722AbfLQRYc (ORCPT ); Tue, 17 Dec 2019 12:24:32 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:23609 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726885AbfLQRYb (ORCPT ); Tue, 17 Dec 2019 12:24:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576603470; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=z9EWxVih18eWOWqVZH496crr0Ey2713iPaECnfpP2vE=; b=WzgiU9HD/0RIy1KMYHbppXdRk6cUoxVgmi9ADIbNXvDuhlaFrhZY/lDaAocBIR/hzYsYXY QaiEOkGBdc1Ur9Mq9bBg+Kp0rE81nJwX3KoTmbC4WRH41qMg0RBwjteAjyiYh3HSXyJylv a9FLNw8SS2hJgMuuZRK1jd5W2qfJU08= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-117-rLIk8wDJP16gfQOgon_8HA-1; Tue, 17 Dec 2019 12:24:26 -0500 X-MC-Unique: rLIk8wDJP16gfQOgon_8HA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 42E7E8017DF; Tue, 17 Dec 2019 17:24:24 +0000 (UTC) Received: from [10.36.116.117] (ovpn-116-117.ams2.redhat.com [10.36.116.117]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 12510620A7; Tue, 17 Dec 2019 17:24:19 +0000 (UTC) Subject: Re: [PATCH v3 09/13] iommu/arm-smmu-v3: Handle failure of arm_smmu_write_ctx_desc() To: Jean-Philippe Brucker , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux-foundation.org Cc: joro@8bytes.org, robh+dt@kernel.org, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, guohanjun@huawei.com, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, will@kernel.org, robin.murphy@arm.com, bhelgaas@google.com, jonathan.cameron@huawei.com, zhangfei.gao@linaro.org References: <20191209180514.272727-1-jean-philippe@linaro.org> <20191209180514.272727-10-jean-philippe@linaro.org> From: Auger Eric Message-ID: Date: Tue, 17 Dec 2019 18:24:18 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20191209180514.272727-10-jean-philippe@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hi Jean, On 12/9/19 7:05 PM, Jean-Philippe Brucker wrote: > Second-level context descriptor tables will be allocated lazily in > arm_smmu_write_ctx_desc(). Help with handling allocation failure by > moving the CD write into arm_smmu_domain_finalise_s1(). nit: would rather change the title to something like "Prepare for arm_smmu_write_ctx_desc() failure" > > Signed-off-by: Jean-Philippe Brucker Reviewed-by: Eric Auger Thanks Eric > --- > drivers/iommu/arm-smmu-v3.c | 11 +++++++---- > 1 file changed, 7 insertions(+), 4 deletions(-) > > diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c > index f260abadde6d..fc5119f34187 100644 > --- a/drivers/iommu/arm-smmu-v3.c > +++ b/drivers/iommu/arm-smmu-v3.c > @@ -2301,8 +2301,15 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain, > cfg->cd.ttbr = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0]; > cfg->cd.tcr = pgtbl_cfg->arm_lpae_s1_cfg.tcr; > cfg->cd.mair = pgtbl_cfg->arm_lpae_s1_cfg.mair; > + > + ret = arm_smmu_write_ctx_desc(smmu_domain, 0, &cfg->cd); > + if (ret) > + goto out_free_tables; > + > return 0; > > +out_free_tables: > + arm_smmu_free_cd_tables(smmu_domain); > out_free_asid: > arm_smmu_bitmap_free(smmu->asid_map, asid); > return ret; > @@ -2569,10 +2576,6 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) > if (smmu_domain->stage != ARM_SMMU_DOMAIN_BYPASS) > master->ats_enabled = arm_smmu_ats_supported(master); > > - if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) > - arm_smmu_write_ctx_desc(smmu_domain, 0, > - &smmu_domain->s1_cfg.cd); > - > arm_smmu_install_ste_for_dev(master); > > spin_lock_irqsave(&smmu_domain->devices_lock, flags); >