From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [RFC v5 02/17] iommu/arm-smmu: advertise DOMAIN_ATTR_MSI_MAPPING attribute Date: Tue, 1 Mar 2016 18:27:42 +0000 Message-ID: <1456856877-4817-3-git-send-email-eric.auger@linaro.org> References: <1456856877-4817-1-git-send-email-eric.auger@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id D51BB411BE for ; Tue, 1 Mar 2016 13:21:11 -0500 (EST) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AwkQ9b0zAo-i for ; Tue, 1 Mar 2016 13:21:11 -0500 (EST) Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id DE3EA41267 for ; Tue, 1 Mar 2016 13:21:10 -0500 (EST) Received: by mail-wm0-f41.google.com with SMTP id l68so48079452wml.0 for ; Tue, 01 Mar 2016 10:28:18 -0800 (PST) In-Reply-To: <1456856877-4817-1-git-send-email-eric.auger@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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: patches@linaro.org, Manish.Jaggi@caviumnetworks.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org List-Id: kvmarm@lists.cs.columbia.edu On ARM, MSI write transactions from device upstream to the smmu are conveyed through the iommu. Therefore target physical addresses must be mapped and DOMAIN_ATTR_MSI_MAPPING is set to advertise this requirement on arm-smmu and arm-smmu-v3. Signed-off-by: Eric Auger Signed-off-by: Bharat Bhushan --- v4 -> v5: - don't handle fsl_pamu_domain anymore - handle arm-smmu-v3 --- drivers/iommu/arm-smmu-v3.c | 2 ++ drivers/iommu/arm-smmu.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 2087534..1d7b506 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1895,6 +1895,8 @@ 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/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; } -- 1.9.1