From patchwork Thu Nov 19 12:11:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 328405 Delivered-To: patch@linaro.org Received: by 2002:a05:6e02:5ce:0:0:0:0 with SMTP id l14csp361579ils; Thu, 19 Nov 2020 04:13:57 -0800 (PST) X-Google-Smtp-Source: ABdhPJyKeFN7ojkrsbc5gpIGSqpDb1VjDwJ1jpgYDs85m1CWXHRMFd69HD3tKKzyVM/If6EDxW7W X-Received: by 2002:aa7:d443:: with SMTP id q3mr32093942edr.262.1605788037428; Thu, 19 Nov 2020 04:13:57 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1605788037; cv=none; d=google.com; s=arc-20160816; b=fHmYXgNF0dOfWcHC3APktHc12n0goMOb1DR0M5ANAy10JiUDd5+w5+Ac6RSumvEp6R m+AEHMTH5zcwBrsESX3phT7WrwF05ruIPZDSSH5NFM12yS0OJJKxpuej60t2tCTkSjKO ZvuZxSMaT7qEYP3WNt9sA0xlX1qVcCsCQ/aneME4fW5L1tlIKsHbwUh+/boA/ZdNJx5p 0qKEzg7vFAeWXFsCbnFUCw+6fd5WQtL15zYtbheLYG5d0YtrPgC6RpY0a/UsHjcbIQOk +3+kGEYK2Wrzg19RaqMr1JoTci10DY0E5QoFbnZDhWPuC5gNUatmLcYMy+C2+bwUrzlJ 4+IQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=lGwC+kYTAIamTf87KCNQHqRe7Pcpk6ns/QMMUYyKs30=; b=1JsRkUh6vZLUJtzWOJ4vJ2HBwXbFFKQmlI9HLFtUuel7a9l8rTM2tx5T8tdyQ8/LTU x1IE9IO4bAzGn69OzTKlxFnNCny4P0kdsg48YMfgkboS6TmREb9q9iWqa+KkJ/xzBDg7 UhHdjds9Ahjk7YZRiF/dqYbWNmhjV7GOGHIN75HU14iJylzakXrRgTBERAc3ob1C9FNf H8nEI6K6g4rOji3cEADplZ8R5225kEqdy20FVaRThVtMc63JYOBlflVMpRoqYIiYoduy aoAMea51+tR4tx1xpq7wRQPAiV/fksr/qkwTHhHGwUVEmDwmQS+KAz6wc8VFMfeDnusG GXLw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id qc4si16705640ejb.188.2020.11.19.04.13.57; Thu, 19 Nov 2020 04:13:57 -0800 (PST) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727304AbgKSMNV (ORCPT + 5 others); Thu, 19 Nov 2020 07:13:21 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:8373 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727269AbgKSMNV (ORCPT ); Thu, 19 Nov 2020 07:13:21 -0500 Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4CcJV528Nrz70BV; Thu, 19 Nov 2020 20:13:01 +0800 (CST) Received: from S00345302A-PC.china.huawei.com (10.210.168.73) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.487.0; Thu, 19 Nov 2020 20:13:09 +0800 From: Shameer Kolothum To: , , , CC: , , , , , , , , Subject: [RFC PATCH v2 8/8] =?utf-8?q?iommu/arm-smmu-v3=3A_Reserve_any_RMR?= =?utf-8?q?_regions_associated_with_a=C2=A0dev?= Date: Thu, 19 Nov 2020 12:11:50 +0000 Message-ID: <20201119121150.3316-9-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20201119121150.3316-1-shameerali.kolothum.thodi@huawei.com> References: <20201119121150.3316-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.210.168.73] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Get RMR regions associated with a dev reserved so that there is a unity mapping for them in SMMU. Signed-off-by: Shameer Kolothum --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 38 +++++++++++++++++++++ 1 file changed, 38 insertions(+) -- 2.17.1 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 97df1df001c9..174a9bcfd627 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2492,6 +2492,43 @@ static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args) return iommu_fwspec_add_ids(dev, args->args, 1); } +static bool arm_smmu_dev_has_rmr(struct arm_smmu_master *master, + struct iommu_rmr *e) +{ + int i, j; + + for (i = 0; i < master->num_sids; i++) { + for (j = 0; j < e->num_ids; j++) { + if (e->ids[j] == master->sids[i]) + return true; + } + } + + return false; +} + +static void arm_smmu_rmr_get_resv_regions(struct device *dev, + struct list_head *head) +{ + struct arm_smmu_master *master = dev_iommu_priv_get(dev); + struct arm_smmu_device *smmu = master->smmu; + struct iommu_rmr *rmr; + + list_for_each_entry(rmr, &smmu->rmr_list, list) { + struct iommu_resv_region *region; + int prot = IOMMU_READ | IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO; + + if (!arm_smmu_dev_has_rmr(master, rmr)) + continue; + region = iommu_alloc_resv_region(rmr->base_address, + rmr->length, prot, + IOMMU_RESV_DIRECT); + if (!region) + return; + + list_add_tail(®ion->list, head); + } +} static void arm_smmu_get_resv_regions(struct device *dev, struct list_head *head) { @@ -2506,6 +2543,7 @@ static void arm_smmu_get_resv_regions(struct device *dev, list_add_tail(®ion->list, head); iommu_dma_get_resv_regions(dev, head); + arm_smmu_rmr_get_resv_regions(dev, head); } static bool arm_smmu_dev_has_feature(struct device *dev,