From patchwork Thu Jul 28 14:51:40 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 72974 Delivered-To: patch@linaro.org Received: by 10.140.29.52 with SMTP id a49csp894621qga; Thu, 28 Jul 2016 07:54:21 -0700 (PDT) X-Received: by 10.36.23.21 with SMTP id 21mr40461118ith.67.1469717661233; Thu, 28 Jul 2016 07:54:21 -0700 (PDT) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org. [192.237.175.120]) by mx.google.com with ESMTPS id l134si13459515ith.67.2016.07.28.07.54.20 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 28 Jul 2016 07:54:21 -0700 (PDT) Received-SPF: neutral (google.com: 192.237.175.120 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) client-ip=192.237.175.120; Authentication-Results: mx.google.com; spf=neutral (google.com: 192.237.175.120 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 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bSmfa-0003EB-F2; Thu, 28 Jul 2016 14:52:18 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bSmfZ-0003CI-Ge for xen-devel@lists.xen.org; Thu, 28 Jul 2016 14:52:17 +0000 Received: from [85.158.137.68] by server-7.bemta-3.messagelabs.com id 00/AB-03271-02C1A975; Thu, 28 Jul 2016 14:52:16 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrALMWRWlGSWpSXmKPExsVysyfVTVdBZla 4wax2MYslHxezODB6HN39mymAMYo1My8pvyKBNePpfY6CQ6wVxz9vYmxgvMjSxcjFISSwiVHi 8a0JbBDOaUaJh/3PmLoYOTnYBDQl7nz+BGaLCEhLXPt8mRGkiFmgnVFibX8vcxcjB4ewQKTE2 d31IDUsAqoSNyasZgUJ8wq4SFz9mggSlhCQkzh5bDJYmBMo/LpbCCQsJOAsMX3mUsYJjNwLGB lWMWoUpxaVpRbpGhrqJRVlpmeU5CZm5ugaGhjr5aYWFyemp+YkJhXrJefnbmIE+pYBCHYwrv7 tdIhRkoNJSZQ3LHRmuBBfUn5KZUZicUZ8UWlOavEhRhkODiUJ3ltSs8KFBItS01Mr0jJzgEEG k5bg4FES4ZWTBkrzFhck5hZnpkOkTjHqciz4cXstkxBLXn5eqpQ4bw3IDAGQoozSPLgRsIC/x CgrJczLCHSUEE9BalFuZgmq/CtGcQ5GJWFeZpBVPJl5JXCbXgEdwQR0RHHsDJAjShIRUlINjH oyKSUuVmtzPgXs+B9bnFx9MXb7n2PnZyudYLPl76qs31K2smvXnLI9roWCHxcmR32JPB5wqay Bo7pnDpu6zqwDbOK96ze0//KalBepm7v8g3Gdt0qYd3yvtnzf1AU+k30f8vDVPW8oF5lX7id/ uscpY/Ke/OwZVkx6kstL7tnPXPHCYZmvEktxRqKhFnNRcSIAQ9lOmnMCAAA= X-Env-Sender: julien.grall@arm.com X-Msg-Ref: server-3.tower-31.messagelabs.com!1469717535!52886556!1 X-Originating-IP: [217.140.101.70] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 8.77; banners=-,-,- X-VirusChecked: Checked Received: (qmail 54534 invoked from network); 28 Jul 2016 14:52:16 -0000 Received: from foss.arm.com (HELO foss.arm.com) (217.140.101.70) by server-3.tower-31.messagelabs.com with SMTP; 28 Jul 2016 14:52:16 -0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B60C7BFC; Thu, 28 Jul 2016 07:53:32 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.218.32]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 825A83F21A; Thu, 28 Jul 2016 07:52:14 -0700 (PDT) From: Julien Grall To: xen-devel@lists.xen.org Date: Thu, 28 Jul 2016 15:51:40 +0100 Message-Id: <1469717505-8026-18-git-send-email-julien.grall@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1469717505-8026-1-git-send-email-julien.grall@arm.com> References: <1469717505-8026-1-git-send-email-julien.grall@arm.com> Cc: proskurin@sec.in.tum.de, Julien Grall , sstabellini@kernel.org, steve.capper@arm.com, wei.chen@linaro.org Subject: [Xen-devel] [RFC 17/22] xen/arm: p2m: Introduce a helper to check if an entry is a superpage 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: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" Use the level and the entry to know whether an entry is a superpage. A superpage can only happen below level 3. Signed-off-by: Julien Grall --- xen/arch/arm/p2m.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index ca2f1b0..c93e554 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -57,6 +57,11 @@ static inline bool_t p2m_mapping(lpae_t pte) return p2m_valid(pte) && !pte.p2m.table; } +static inline bool_t p2m_is_superpage(lpae_t pte, unsigned int level) +{ + return (level < 3) && p2m_mapping(pte); +} + static inline void p2m_write_lock(struct p2m_domain *p2m) { write_lock(&p2m->lock);