From patchwork Tue Nov 17 09:40:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 56754 Delivered-To: patch@linaro.org Received: by 10.112.155.196 with SMTP id vy4csp1828081lbb; Tue, 17 Nov 2015 01:50:22 -0800 (PST) X-Received: by 10.55.71.19 with SMTP id u19mr40164554qka.82.1447753822195; Tue, 17 Nov 2015 01:50:22 -0800 (PST) Return-Path: Received: from lists.xen.org (lists.xenproject.org. [50.57.142.19]) by mx.google.com with ESMTPS id b7si2647091qgb.119.2015.11.17.01.50.21 (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 17 Nov 2015 01:50:22 -0800 (PST) Received-SPF: neutral (google.com: 50.57.142.19 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) client-ip=50.57.142.19; Authentication-Results: mx.google.com; spf=neutral (google.com: 50.57.142.19 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) smtp.mailfrom=xen-devel-bounces@lists.xen.org; dkim=neutral (body hash did not verify) header.i=@linaro-org.20150623.gappssmtp.com Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1Zycsz-0008TP-3x; Tue, 17 Nov 2015 09:49:13 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1Zycsx-0008Rf-GB for xen-devel@lists.xen.org; Tue, 17 Nov 2015 09:49:11 +0000 Received: from [85.158.139.211] by server-11.bemta-5.messagelabs.com id 14/CF-24494-618FA465; Tue, 17 Nov 2015 09:49:10 +0000 X-Env-Sender: shannon.zhao@linaro.org X-Msg-Ref: server-11.tower-206.messagelabs.com!1447753749!4242215!1 X-Originating-IP: [74.125.82.45] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.19.2; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11481 invoked from network); 17 Nov 2015 09:49:10 -0000 Received: from mail-wm0-f45.google.com (HELO mail-wm0-f45.google.com) (74.125.82.45) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Nov 2015 09:49:10 -0000 Received: by wmww144 with SMTP id w144so17408507wmw.0 for ; Tue, 17 Nov 2015 01:49:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=gTHWlsBMQb7L77wM40SnuoGOpu1Y4qSe43F5NslAT4M=; b=wRPN7xRPTm11JfzjoohG5AQeUbSIAywakuXmBhBpbMYO6ZjHKkifYH75mt+kBL/5aX tG23TjFqOmvkX90iAb2czS6xo+0lhSrzjfEmT/NbqHXI46yDrGty4kn0rF+hq87frvp/ l84piMgtQa+3eRK+vwFg3jPMRB1gqNPVHNEG19Hiygx1MnLwUanvOihFXIx32W6sS9iF dlMD4jpgNA0jw/DXbsjMnqPoElRly62VR0pz5mRIOoRXL3hqZYDza+YvMTqoSacfD6wc kOVJ9XmH0He3RQ3x6aBmIBCvZXdsFroRdPTxFrPGbmOTwRz2uXV5bVXk06nsBn1JyhF7 xVJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=gTHWlsBMQb7L77wM40SnuoGOpu1Y4qSe43F5NslAT4M=; b=NMtM8TdQtehEaVbI4p2bzSH8UMi0QzUa2cANOpZgL//c7QlDfPtKu/WIfOejz1m07U W0HeXo8QhEqy2Bb7eALZg7JIkkP0PN90luljRZbKiehGYzaV/B/3JQuzTc84r1ghndb3 OVNg2U+roHFPcgs0di0p+xmK1Yke0J9r25sS3rLDhvesJRZXC79LlEwNzGLFeeN1j1aB 1C7n1PcNPmmh1y4Xef8px5hkCFRBlGc94M/sGxjrLUak3gdLV4s/C9D5wjqiOUytl8J5 QeRsFlDpRroBU9uOWzXX95ASemn6Cm1Sc0ok774aSiBzXF8f+NfeEiDVkx0H8F73dgxq g3Og== X-Gm-Message-State: ALoCoQlzzgPcHi6rjrpZeQoKY5Uqm1chyCFd0j6/gbPWdubN2EeDmAywHukuTVQhMFp1IsApOXPj X-Received: by 10.28.217.18 with SMTP id q18mr1550551wmg.10.1447753749690; Tue, 17 Nov 2015 01:49:09 -0800 (PST) Received: from localhost ([78.129.251.54]) by smtp.gmail.com with ESMTPSA id wh10sm13265904wjb.45.2015.11.17.01.49.07 (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 17 Nov 2015 01:49:09 -0800 (PST) From: shannon.zhao@linaro.org To: ian.campbell@citrix.com, stefano.stabellini@citrix.com, keir@xen.org, jbeulich@suse.com, andrew.cooper3@citrix.com, julien.grall@citrix.com, xen-devel@lists.xen.org Date: Tue, 17 Nov 2015 17:40:55 +0800 Message-Id: <1447753261-7552-57-git-send-email-shannon.zhao@linaro.org> X-Mailer: git-send-email 1.9.5.msysgit.1 In-Reply-To: <1447753261-7552-1-git-send-email-shannon.zhao@linaro.org> References: <1447753261-7552-1-git-send-email-shannon.zhao@linaro.org> Cc: mark.rutland@arm.com, hangaohuai@huawei.com, ard.biesheuvel@linaro.org, shannon.zhao@linaro.org, christoffer.dall@linaro.org, peter.huangpeng@huawei.com, david.vrabel@citrix.com, zhaoshenglong@huawei.com, linux-arm-kernel@lists.infradead.org, roger.pau@citrix.com Subject: [Xen-devel] [PATCH v3 56/62] arm/acpi: Deny MMIO access of UART X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org From: Shannon Zhao Firstly it permits full MMIO capabilities for Dom0. Then deny MMIO access of UART device. Signed-off-by: Shannon Zhao --- xen/arch/arm/domain_build.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 6945f89..9532807 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1360,6 +1360,32 @@ static int prepare_dtb(struct domain *d, struct kernel_info *kinfo) #define XEN_HYPERVISOR_ID 0x000058656E564D4D /* "XenVMM" */ #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; + + 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 */ + return iomem_deny_access(d, gfn, gfn + 1); +} + static int acpi_route_spi(struct domain *d) { int i, res; @@ -1930,6 +1956,10 @@ 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