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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, 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 6DAD4C433ED for ; Wed, 19 May 2021 09:44:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 502106109F for ; Wed, 19 May 2021 09:44:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346016AbhESJpd (ORCPT ); Wed, 19 May 2021 05:45:33 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:3028 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239386AbhESJpa (ORCPT ); Wed, 19 May 2021 05:45:30 -0400 Received: from dggems702-chm.china.huawei.com (unknown [172.30.72.58]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4FlSXm3SfrzQpfn; Wed, 19 May 2021 17:40:40 +0800 (CST) Received: from dggema765-chm.china.huawei.com (10.1.198.207) by dggems702-chm.china.huawei.com (10.3.19.179) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Wed, 19 May 2021 17:44:10 +0800 Received: from DESKTOP-6NKE0BC.china.huawei.com (10.174.185.210) by dggema765-chm.china.huawei.com (10.1.198.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 19 May 2021 17:44:10 +0800 From: Kunkun Jiang To: Will Deacon , Robin Murphy , "Eric Auger" , "moderated list:ARM SMMU DRIVERS" , "open list:IOMMU DRIVERS" , open list CC: , Keqian Zhu , "Zenghui Yu" , Kunkun Jiang Subject: [RFC PATCH v1 0/2] iommu/arm-smmu-v3: Add some parameter check in __arm_smmu_tlb_inv_range() Date: Wed, 19 May 2021 17:43:05 +0800 Message-ID: <20210519094307.3275-1-jiangkunkun@huawei.com> X-Mailer: git-send-email 2.26.2.windows.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.174.185.210] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggema765-chm.china.huawei.com (10.1.198.207) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This set of patches solves some errors when I tested the SMMU nested mode. Test scenario description: guest kernel: 4KB translation granule host kernel: 16KB translation granule errors: 1. encountered an endless loop in __arm_smmu_tlb_inv_range because num_pages is 0 2. encountered CERROR_ILL because the fields of TLB invalidation command are as follow: TG = 2, NUM = 0, SCALE = 0, TTL = 0. The combination is exactly the kind of reserved combination pointed out in the SMMUv3 spec(page 143-144, version D.a) In my opinion, it is more appropriate to add parameter check in __arm_smmu_tlb_inv_range(), although these problems only appeared when I tested the SMMU nested mode. What do you think? This series include patches as below: Patch 1: - align the invalid range with leaf page size upwards when smmu supports RIL Patch 2: - add a check to standardize granule size when smmu supports RIL Kunkun Jiang (2): iommu/arm-smmu-v3: Align invalid range with leaf page size upwards when support RIL iommu/arm-smmu-v3: Standardize granule size when support RIL drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 9 +++++++++ 1 file changed, 9 insertions(+) -- 2.23.0