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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 79550C282CE for ; Mon, 22 Apr 2019 19:47:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 490FE218FF for ; Mon, 22 Apr 2019 19:47:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555962446; bh=SWLbllo8DxeoSqq5pqLlUBhpVqixTFUZacJ0l7z86bM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vf80iYLaEHMQJqgjWdcOQLPjapirb9QCiQGg+eeINj3KwyA9ozOGFx26IrvIL2eKx QZtJmk9mF+MujMnlpJGDdz6yk9Ab2mN+Y+cMnLxR6ySkRRzQSOPRNFqe6aHqtC+GGX xfRl5i9KvyEUyYJOYTSFidqQKqS9ekkSbHYN1T/A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730263AbfDVTrY (ORCPT ); Mon, 22 Apr 2019 15:47:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:50092 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730245AbfDVTrV (ORCPT ); Mon, 22 Apr 2019 15:47:21 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 29B5B21906; Mon, 22 Apr 2019 19:47:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555962440; bh=SWLbllo8DxeoSqq5pqLlUBhpVqixTFUZacJ0l7z86bM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pFpylcyOyelgnnGrIJ3Z/rWvYOF23TnDBAyIzKvNh8vQ/bESB0HljZEmAr98/BmC/ 1ZyCM8uHZBUC6AbPHGWpfnE2/bK3Y46PvrI5MbYBDuuqeNSI7jjaHu9bgwwzBuBUkL Az+dFBylK27D55aXM/FYo7NESiue81Sim/SW26TU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Joerg Roedel , Sasha Levin , iommu@lists.linux-foundation.org Subject: [PATCH AUTOSEL 4.19 65/68] iommu/amd: Reserve exclusion range in iova-domain Date: Mon, 22 Apr 2019 15:45:13 -0400 Message-Id: <20190422194516.11634-65-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190422194516.11634-1-sashal@kernel.org> References: <20190422194516.11634-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel [ Upstream commit 8aafaaf2212192012f5bae305bb31cdf7681d777 ] If a device has an exclusion range specified in the IVRS table, this region needs to be reserved in the iova-domain of that device. This hasn't happened until now and can cause data corruption on data transfered with these devices. Treat exclusion ranges as reserved regions in the iommu-core to fix the problem. Fixes: be2a022c0dd0 ('x86, AMD IOMMU: add functions to parse IOMMU memory mapping requirements for devices') Signed-off-by: Joerg Roedel Reviewed-by: Gary R Hook Signed-off-by: Sasha Levin (Microsoft) --- drivers/iommu/amd_iommu.c | 9 ++++++--- drivers/iommu/amd_iommu_init.c | 7 ++++--- drivers/iommu/amd_iommu_types.h | 2 ++ 3 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 0b3877681e4a..8d9920ff4134 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3119,21 +3119,24 @@ static void amd_iommu_get_resv_regions(struct device *dev, return; list_for_each_entry(entry, &amd_iommu_unity_map, list) { + int type, prot = 0; size_t length; - int prot = 0; if (devid < entry->devid_start || devid > entry->devid_end) continue; + type = IOMMU_RESV_DIRECT; length = entry->address_end - entry->address_start; if (entry->prot & IOMMU_PROT_IR) prot |= IOMMU_READ; if (entry->prot & IOMMU_PROT_IW) prot |= IOMMU_WRITE; + if (entry->prot & IOMMU_UNITY_MAP_FLAG_EXCL_RANGE) + /* Exclusion range */ + type = IOMMU_RESV_RESERVED; region = iommu_alloc_resv_region(entry->address_start, - length, prot, - IOMMU_RESV_DIRECT); + length, prot, type); if (!region) { pr_err("Out of memory allocating dm-regions for %s\n", dev_name(dev)); diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index e062ab9687c7..be3801d43d48 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2001,6 +2001,9 @@ static int __init init_unity_map_range(struct ivmd_header *m) if (e == NULL) return -ENOMEM; + if (m->flags & IVMD_FLAG_EXCL_RANGE) + init_exclusion_range(m); + switch (m->type) { default: kfree(e); @@ -2047,9 +2050,7 @@ static int __init init_memory_definitions(struct acpi_table_header *table) while (p < end) { m = (struct ivmd_header *)p; - if (m->flags & IVMD_FLAG_EXCL_RANGE) - init_exclusion_range(m); - else if (m->flags & IVMD_FLAG_UNITY_MAP) + if (m->flags & (IVMD_FLAG_UNITY_MAP | IVMD_FLAG_EXCL_RANGE)) init_unity_map_range(m); p += m->length; diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index e2b342e65a7b..69f3d4c95b53 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -373,6 +373,8 @@ #define IOMMU_PROT_IR 0x01 #define IOMMU_PROT_IW 0x02 +#define IOMMU_UNITY_MAP_FLAG_EXCL_RANGE (1 << 2) + /* IOMMU capabilities */ #define IOMMU_CAP_IOTLB 24 #define IOMMU_CAP_NPCACHE 26 -- 2.19.1