From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50531) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S3PRv-00026W-BO for qemu-devel@nongnu.org; Fri, 02 Mar 2012 05:11:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S3PRt-0005pb-CK for qemu-devel@nongnu.org; Fri, 02 Mar 2012 05:10:54 -0500 Received: from [222.73.24.84] (port=39279 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S3PRt-0005pM-1R for qemu-devel@nongnu.org; Fri, 02 Mar 2012 05:10:53 -0500 Message-ID: <4F509CFC.8010800@cn.fujitsu.com> Date: Fri, 02 Mar 2012 18:12:12 +0800 From: Wen Congyang MIME-Version: 1.0 References: <4F509A00.80207@cn.fujitsu.com> In-Reply-To: <4F509A00.80207@cn.fujitsu.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Subject: [Qemu-devel] [RFC][PATCH 04/16 v8] Add API to check whether paging mode is enabled List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel , Jan Kiszka , Dave Anderson , HATAYAMA Daisuke , Luiz Capitulino , Eric Blake 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 cb72680..01c3c23 100644 --- a/cpu-all.h +++ b/cpu-all.h @@ -526,11 +526,17 @@ int cpu_memory_rw_debug(CPUState *env, target_ulong addr, #if defined(CONFIG_HAVE_GET_MEMORY_MAPPING) int cpu_get_memory_mapping(MemoryMappingList *list, CPUState *env); +bool cpu_paging_enabled(CPUState *env); #else static inline int cpu_get_memory_mapping(MemoryMappingList *list, CPUState *env) { return -1; } + +static inline bool cpu_paging_enabled(CPUState *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 10d9b2c..824f293 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, CPUState *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, CPUState *env) return 0; } + +bool cpu_paging_enabled(CPUState *env) +{ + return env->cr[0] & CR0_PG_MASK; +} -- 1.7.1