From patchwork Thu Mar 17 09:41:04 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 8609061 Return-Path: X-Original-To: patchwork-xen-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8135BC0553 for ; Thu, 17 Mar 2016 09:50:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 89C0D2026C for ; Thu, 17 Mar 2016 09:50:41 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AF62F201CD for ; Thu, 17 Mar 2016 09:50:40 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1agUXz-0007dQ-GF; Thu, 17 Mar 2016 09:48:51 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1agUXy-0007ch-9Y for xen-devel@lists.xen.org; Thu, 17 Mar 2016 09:48:50 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id 5C/CE-29419-08D7AE65; Thu, 17 Mar 2016 09:48:48 +0000 X-Env-Sender: zhaoshenglong@huawei.com X-Msg-Ref: server-2.tower-206.messagelabs.com!1458208125!13586073!1 X-Originating-IP: [119.145.14.66] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTE5LjE0NS4xNC42NiA9PiA4NTI3\n X-StarScan-Received: X-StarScan-Version: 8.11; banners=-,-,- X-VirusChecked: Checked Received: (qmail 62486 invoked from network); 17 Mar 2016 09:48:48 -0000 Received: from szxga03-in.huawei.com (HELO szxga03-in.huawei.com) (119.145.14.66) by server-2.tower-206.messagelabs.com with RC4-SHA encrypted SMTP; 17 Mar 2016 09:48:48 -0000 Received: from 172.24.1.48 (EHLO szxeml432-hub.china.huawei.com) ([172.24.1.48]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id BYG52654; Thu, 17 Mar 2016 17:42:20 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by szxeml432-hub.china.huawei.com (10.82.67.209) with Microsoft SMTP Server id 14.3.235.1; Thu, 17 Mar 2016 17:41:47 +0800 From: Shannon Zhao To: Date: Thu, 17 Mar 2016 17:41:04 +0800 Message-ID: <1458207668-12012-19-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1458207668-12012-1-git-send-email-zhaoshenglong@huawei.com> References: <1458207668-12012-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020203.56EA7BFF.0001, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: bfde3f63c72c75962db61e0b4525ce22 Cc: julien.grall@arm.com, zhaoshenglong@huawei.com, stefano.stabellini@citrix.com, shannon.zhao@linaro.org, peter.huangpeng@huawei.com Subject: [Xen-devel] [PATCH v6 18/22] arm/acpi: Permit MMIO access of Xen unused devices for Dom0 X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Shannon Zhao Firstly it permits full MMIO capabilities for Dom0. Then deny MMIO access of Xen used devices, such as UART, GIC, SMMU. Currently, it only denies the MMIO access of UART and GIC regions. For other Xen used devices it could be added later when they are supported. Signed-off-by: Shannon Zhao Reviewed-by: Stefano Stabellini Acked-by: Julien Grall --- xen/arch/arm/domain_build.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 1e5ee0e..a4abf28 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1359,6 +1359,38 @@ static int prepare_dtb(struct domain *d, struct kernel_info *kinfo) #ifdef CONFIG_ACPI #define ACPI_DOM0_FDT_MIN_SIZE 4096 +static int acpi_iomem_deny_access(struct domain *d) +{ + acpi_status status; + struct acpi_table_spcr *spcr = NULL; + unsigned long gfn; + int rc; + + /* Firstly permit full MMIO capabilities. */ + rc = iomem_permit_access(d, 0UL, ~0UL); + if ( rc ) + return rc; + + /* TODO: Deny MMIO access for SMMU, GIC ITS */ + status = acpi_get_table(ACPI_SIG_SPCR, 0, + (struct acpi_table_header **)&spcr); + + if ( ACPI_FAILURE(status) ) + { + printk("Failed to get SPCR table\n"); + return -EINVAL; + } + + gfn = spcr->serial_port.address >> PAGE_SHIFT; + /* Deny MMIO access for UART */ + rc = iomem_deny_access(d, gfn, gfn + 1); + if ( rc ) + return rc; + + /* Deny MMIO access for GIC regions */ + return gic_iomem_deny_access(d); +} + static int acpi_permit_spi_access(struct domain *d) { int i, res; @@ -1880,6 +1912,10 @@ static int prepare_acpi(struct domain *d, struct kernel_info *kinfo) if ( rc != 0 ) return rc; + rc = acpi_iomem_deny_access(d); + if ( rc != 0 ) + return rc; + return 0; } #else