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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 1F65FC432BE for ; Wed, 28 Jul 2021 16:00:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A3306101B for ; Wed, 28 Jul 2021 16:00:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237570AbhG1QAY (ORCPT ); Wed, 28 Jul 2021 12:00:24 -0400 Received: from foss.arm.com ([217.140.110.172]:59488 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237485AbhG1P7s (ORCPT ); Wed, 28 Jul 2021 11:59:48 -0400 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 031BE1FB; Wed, 28 Jul 2021 08:59:47 -0700 (PDT) Received: from 010265703453.arm.com (unknown [10.57.36.146]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 862A93F70D; Wed, 28 Jul 2021 08:59:45 -0700 (PDT) From: Robin Murphy To: joro@8bytes.org, will@kernel.org Cc: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, suravee.suthikulpanit@amd.com, baolu.lu@linux.intel.com, john.garry@huawei.com, dianders@chromium.org Subject: [PATCH v2 23/24] iommu/arm-smmu: Allow non-strict in pgtable_quirks interface Date: Wed, 28 Jul 2021 16:58:44 +0100 Message-Id: <0fcd1f5225a6b435cbc697551a6247cd435c04db.1627468310.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To make io-pgtable aware of a flush queue being dynamically enabled, allow IO_PGTABLE_QUIRK_NON_STRICT to be set even after a domain has been attached to, and hook up the final piece of the puzzle in iommu-dma. Signed-off-by: Robin Murphy --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 15 +++++++++++++++ drivers/iommu/arm/arm-smmu/arm-smmu.c | 11 +++++++++++ drivers/iommu/dma-iommu.c | 3 +++ 3 files changed, 29 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 19400826eba7..40fa9cb382c3 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2711,6 +2711,20 @@ static int arm_smmu_enable_nesting(struct iommu_domain *domain) return ret; } +static int arm_smmu_set_pgtable_quirks(struct iommu_domain *domain, + unsigned long quirks) +{ + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + + if (quirks == IO_PGTABLE_QUIRK_NON_STRICT && smmu_domain->pgtbl_ops) { + struct io_pgtable *iop = io_pgtable_ops_to_pgtable(smmu_domain->pgtbl_ops); + + iop->cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT; + return 0; + } + return -EINVAL; +} + static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args) { return iommu_fwspec_add_ids(dev, args->args, 1); @@ -2825,6 +2839,7 @@ static struct iommu_ops arm_smmu_ops = { .release_device = arm_smmu_release_device, .device_group = arm_smmu_device_group, .enable_nesting = arm_smmu_enable_nesting, + .set_pgtable_quirks = arm_smmu_set_pgtable_quirks, .of_xlate = arm_smmu_of_xlate, .get_resv_regions = arm_smmu_get_resv_regions, .put_resv_regions = generic_iommu_put_resv_regions, diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index 109e4723f9f5..f18684f308b9 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -1518,6 +1518,17 @@ static int arm_smmu_set_pgtable_quirks(struct iommu_domain *domain, struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); int ret = 0; + if (quirks == IO_PGTABLE_QUIRK_NON_STRICT) { + struct io_pgtable *iop; + + if (!smmu_domain->pgtbl_ops) + return -EINVAL; + + iop = io_pgtable_ops_to_pgtable(smmu_domain->pgtbl_ops); + iop->cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT; + return 0; + } + mutex_lock(&smmu_domain->init_mutex); if (smmu_domain->smmu) ret = -EPERM; diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 304a3ec71223..6e3eca778267 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -326,6 +327,8 @@ int iommu_dma_init_fq(struct iommu_domain *domain) return -ENODEV; } cookie->fq_domain = domain; + if (domain->ops->set_pgtable_quirks) + domain->ops->set_pgtable_quirks(domain, IO_PGTABLE_QUIRK_NON_STRICT); return 0; } -- 2.25.1