From patchwork Fri Feb 26 17:35:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 8440371 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 7A94CC0553 for ; Fri, 26 Feb 2016 17:41:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A17B6203AD for ; Fri, 26 Feb 2016 17:41:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6C34C203B8 for ; Fri, 26 Feb 2016 17:41:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030289AbcBZRgJ (ORCPT ); Fri, 26 Feb 2016 12:36:09 -0500 Received: from mail-wm0-f48.google.com ([74.125.82.48]:37879 "EHLO mail-wm0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030230AbcBZRgH (ORCPT ); Fri, 26 Feb 2016 12:36:07 -0500 Received: by mail-wm0-f48.google.com with SMTP id g62so79654308wme.0 for ; Fri, 26 Feb 2016 09:36:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=sPP4z9gz+YM5sgwa3CGYUoqQ4UJfqzZ1slgqlt9b3os=; b=R5yhmw4l8R4E6PYfxBDh3/pCdqE1VMr8wJWok7uhGiW+J+aw6NSHGdPTCqmyccPRam tzkn6/p0Y6k1zL9ZC2eO7fFsU4e+diJBguFOMZl5zLMo87XTGjXVB2ki9smdqZWyzg7k Vcdxqt+pgSsJNr4vCM/FpsfbFvxFch9dGYRt8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=sPP4z9gz+YM5sgwa3CGYUoqQ4UJfqzZ1slgqlt9b3os=; b=jseqvFDJiiQdO+6q4BCXw9AVCcOoS5iV7m9yxmCtX2/EZeyQ8D7Jb6BbC6bWPUrTPI TTh7MGb0ezOL9VPd+8Ts8APY9K2fSbv1zyQEeVAgggV4UzaIN1KLBahRMf4yHAH0N/yl LP7HyH5MCUg5T4NKOVI2YmAkZ3q4ZCZGEUMc6f7RGRjM511Y/lfTG1OSOwyFH+fkvKWG T1sSgIbPfWaa+nkwWXbq05uujo33z00MmKu4WeLay6uI5ms0Rjv5GJWQXFnWWdqCrtxj lAyw6tKvifHzWWXZ4DjPl2MjjqmsTWMDiP6xVWS9gJ5dM1QnePajTSO19OOlvb14yXF7 2vvA== X-Gm-Message-State: AD7BkJIPGSH+6fFiNSQV7L0L30JokY5i2jNnRjB/84tsHHd5nZzqK/hez5QdjjWgckLs30uT X-Received: by 10.194.71.177 with SMTP id w17mr3387495wju.36.1456508165684; Fri, 26 Feb 2016 09:36:05 -0800 (PST) Received: from new-host-8.home (LMontsouris-657-1-37-90.w80-11.abo.wanadoo.fr. [80.11.198.90]) by smtp.gmail.com with ESMTPSA id 77sm3750373wmp.18.2016.02.26.09.36.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 26 Feb 2016 09:36:02 -0800 (PST) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, christoffer.dall@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: suravee.suthikulpanit@amd.com, patches@linaro.org, linux-kernel@vger.kernel.org, Manish.Jaggi@caviumnetworks.com, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org Subject: [RFC v4 01/14] iommu: Add DOMAIN_ATTR_MSI_MAPPING attribute Date: Fri, 26 Feb 2016 17:35:41 +0000 Message-Id: <1456508154-2253-2-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1456508154-2253-1-git-send-email-eric.auger@linaro.org> References: <1456508154-2253-1-git-send-email-eric.auger@linaro.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce new DOMAIN_ATTR_MSI_MAPPING domain attribute. If supported, this means the MSI addresses need to be mapped in the IOMMU. ARM SMMUS and FSL PAMU, at least expose this attribute. x86 IOMMUs typically don't expose the attribute since on x86, MSI write transaction addresses always are within the 1MB PA region [FEE0_0000h - FEF0_000h] window which directly targets the APIC configuration space and hence bypass the sMMU. Signed-off-by: Bharat Bhushan Signed-off-by: Eric Auger --- RFC v1 -> v1: - the data field is not used - for this attribute domain_get_attr simply returns 0 if the MSI_MAPPING capability if needed or <0 if not. - removed struct iommu_domain_msi_maps --- drivers/iommu/arm-smmu.c | 2 ++ drivers/iommu/fsl_pamu_domain.c | 2 ++ include/linux/iommu.h | 1 + 3 files changed, 5 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 59ee4b8..c8b7e71 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1409,6 +1409,8 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, case DOMAIN_ATTR_NESTING: *(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED); return 0; + case DOMAIN_ATTR_MSI_MAPPING: + return 0; default: return -ENODEV; } diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c index da0e1e3..46d5c6a 100644 --- a/drivers/iommu/fsl_pamu_domain.c +++ b/drivers/iommu/fsl_pamu_domain.c @@ -856,6 +856,8 @@ static int fsl_pamu_get_domain_attr(struct iommu_domain *domain, case DOMAIN_ATTR_FSL_PAMUV1: *(int *)data = DOMAIN_ATTR_FSL_PAMUV1; break; + case DOMAIN_ATTR_MSI_MAPPING: + break; default: pr_debug("Unsupported attribute type\n"); ret = -EINVAL; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a5c539f..a4fe04a 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -112,6 +112,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMU_ENABLE, DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ + DOMAIN_ATTR_MSI_MAPPING, /* Require MSIs mapping in iommu */ DOMAIN_ATTR_MAX, };