From patchwork Wed Apr 18 07:24:52 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 153412 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 17CF6B6EEB for ; Wed, 18 Apr 2012 17:22:06 +1000 (EST) Received: from localhost ([::1]:33224 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SKPDH-0000C8-T9 for incoming@patchwork.ozlabs.org; Wed, 18 Apr 2012 03:22:03 -0400 Received: from eggs.gnu.org ([208.118.235.92]:38346) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SKPD5-0000As-7Q for qemu-devel@nongnu.org; Wed, 18 Apr 2012 03:21:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SKPCy-00077G-QP for qemu-devel@nongnu.org; Wed, 18 Apr 2012 03:21:50 -0400 Received: from [222.73.24.84] (port=8658 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SKPCy-00076u-Ee for qemu-devel@nongnu.org; Wed, 18 Apr 2012 03:21:44 -0400 X-IronPort-AV: E=Sophos;i="4.75,440,1330876800"; d="scan'208";a="4781000" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 18 Apr 2012 15:21:22 +0800 Received: from mailserver.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id q3I7LeIl001878; Wed, 18 Apr 2012 15:21:40 +0800 Received: from [10.167.225.226] ([10.167.225.226]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2012041815204708-55176 ; Wed, 18 Apr 2012 15:20:47 +0800 Message-ID: <4F8E6C44.7000409@cn.fujitsu.com> Date: Wed, 18 Apr 2012 15:24:52 +0800 From: Wen Congyang User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 MIME-Version: 1.0 To: qemu-devel , HATAYAMA Daisuke , Luiz Capitulino References: <4F8E6B04.2050807@cn.fujitsu.com> In-Reply-To: <4F8E6B04.2050807@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/04/18 15:20:47, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/04/18 15:20:48, Serialize complete at 2012/04/18 15:20:48 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 222.73.24.84 Subject: [Qemu-devel] [PATCH 04/12 v12] Add API to check whether paging mode is enabled X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This API will be used in the following patch. Signed-off-by: Wen Congyang --- cpu-all.h | 6 ++++++ target-i386/arch_memory_mapping.c | 7 ++++++- 2 files changed, 12 insertions(+), 1 deletions(-) diff --git a/cpu-all.h b/cpu-all.h index bb43548..eb35415 100644 --- a/cpu-all.h +++ b/cpu-all.h @@ -529,12 +529,18 @@ int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr, #if defined(CONFIG_HAVE_GET_MEMORY_MAPPING) int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env); +bool cpu_paging_enabled(CPUArchState *env); #else static inline int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env) { return -1; } + +static inline bool cpu_paging_enabled(CPUArchState *env) +{ + return true; +} #endif #endif /* CPU_ALL_H */ diff --git a/target-i386/arch_memory_mapping.c b/target-i386/arch_memory_mapping.c index dd64bec..bd50e11 100644 --- a/target-i386/arch_memory_mapping.c +++ b/target-i386/arch_memory_mapping.c @@ -233,7 +233,7 @@ static void walk_pml4e(MemoryMappingList *list, int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env) { - if (!(env->cr[0] & CR0_PG_MASK)) { + if (!cpu_paging_enabled(env)) { /* paging is disabled */ return 0; } @@ -264,3 +264,8 @@ int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env) return 0; } + +bool cpu_paging_enabled(CPUArchState *env) +{ + return env->cr[0] & CR0_PG_MASK; +}